org.aspectj/weaver/src/main/java/org/aspectj/weaver/bcel/BcelTypeMunger.java

/* *******************************************************************
 * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     PARC     initial implementation
 *     Alexandre Vasseur    @AspectJ ITDs
 * ******************************************************************/

package org.aspectj.weaver.bcel;

import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.ClassFormatException;
import org.aspectj.apache.bcel.classfile.ConstantPool;
import org.aspectj.apache.bcel.classfile.Signature;
import org.aspectj.apache.bcel.classfile.annotation.AnnotationGen;
import org.aspectj.apache.bcel.generic.FieldGen;
import org.aspectj.apache.bcel.generic.InstructionBranch;
import org.aspectj.apache.bcel.generic.InstructionConstants;
import org.aspectj.apache.bcel.generic.InstructionFactory;
import org.aspectj.apache.bcel.generic.InstructionHandle;
import org.aspectj.apache.bcel.generic.InstructionList;
import org.aspectj.apache.bcel.generic.InvokeInstruction;
import org.aspectj.apache.bcel.generic.Type;
import org.aspectj.asm.AsmManager;
import org.aspectj.asm.IProgramElement;
import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.ISourceLocation;
import org.aspectj.bridge.Message;
import org.aspectj.bridge.MessageUtil;
import org.aspectj.bridge.WeaveMessage;
import org.aspectj.bridge.context.CompilationAndWeavingContext;
import org.aspectj.bridge.context.ContextToken;
import org.aspectj.weaver.AjcMemberMaker;
import org.aspectj.weaver.AnnotationAJ;
import org.aspectj.weaver.AnnotationOnTypeMunger;
import org.aspectj.weaver.BCException;
import org.aspectj.weaver.ConcreteTypeMunger;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.MemberUtils;
import org.aspectj.weaver.MethodDelegateTypeMunger;
import org.aspectj.weaver.NameMangler;
import org.aspectj.weaver.NewConstructorTypeMunger;
import org.aspectj.weaver.NewFieldTypeMunger;
import org.aspectj.weaver.NewMemberClassTypeMunger;
import org.aspectj.weaver.NewMethodTypeMunger;
import org.aspectj.weaver.NewParentTypeMunger;
import org.aspectj.weaver.PerObjectInterfaceTypeMunger;
import org.aspectj.weaver.PrivilegedAccessMunger;
import org.aspectj.weaver.ResolvedMember;
import org.aspectj.weaver.ResolvedMemberImpl;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.ResolvedTypeMunger;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.TypeVariableReference;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.WeaverStateInfo;
import org.aspectj.weaver.World;
import org.aspectj.weaver.model.AsmRelationshipProvider;
import org.aspectj.weaver.patterns.DeclareAnnotation;
import org.aspectj.weaver.patterns.Pointcut;

public class BcelTypeMunger extends ConcreteTypeMunger {

	public BcelTypeMunger(ResolvedTypeMunger munger, ResolvedType aspectType) {
		super(munger, aspectType);
	}

	@Override
	public String toString() {
		return "(BcelTypeMunger " + getMunger() + ")";
	}

	@Override
	public boolean shouldOverwrite() {
		return false;
	}

	public boolean munge(BcelClassWeaver weaver) {
		ContextToken tok = CompilationAndWeavingContext.enteringPhase(CompilationAndWeavingContext.MUNGING_WITH, this);
		boolean changed = false;
		boolean worthReporting = true;

		if (weaver.getWorld().isOverWeaving()) {
			WeaverStateInfo typeWeaverState = weaver.getLazyClassGen().getType().getWeaverState();
			if (typeWeaverState != null && typeWeaverState.isAspectAlreadyApplied(getAspectType())) {
				return false;
			}
		}

		if (munger.getKind() == ResolvedTypeMunger.Field) {
			changed = mungeNewField(weaver, (NewFieldTypeMunger) munger);
		} else if (munger.getKind() == ResolvedTypeMunger.Method) {
			changed = mungeNewMethod(weaver, (NewMethodTypeMunger) munger);
		} else if (munger.getKind() == ResolvedTypeMunger.InnerClass) {
			changed = mungeNewMemberType(weaver, (NewMemberClassTypeMunger) munger);
		} else if (munger.getKind() == ResolvedTypeMunger.MethodDelegate2) {
			changed = mungeMethodDelegate(weaver, (MethodDelegateTypeMunger) munger);
		} else if (munger.getKind() == ResolvedTypeMunger.FieldHost) {
			changed = mungeFieldHost(weaver, (MethodDelegateTypeMunger.FieldHostTypeMunger) munger);
		} else if (munger.getKind() == ResolvedTypeMunger.PerObjectInterface) {
			changed = mungePerObjectInterface(weaver, (PerObjectInterfaceTypeMunger) munger);
			worthReporting = false;
		} else if (munger.getKind() == ResolvedTypeMunger.PerTypeWithinInterface) {
			// PTWIMPL Transform the target type (add the aspect instance field)
			changed = mungePerTypeWithinTransformer(weaver);
			worthReporting = false;
		} else if (munger.getKind() == ResolvedTypeMunger.PrivilegedAccess) {
			changed = mungePrivilegedAccess(weaver, (PrivilegedAccessMunger) munger);
			worthReporting = false;
		} else if (munger.getKind() == ResolvedTypeMunger.Constructor) {
			changed = mungeNewConstructor(weaver, (NewConstructorTypeMunger) munger);
		} else if (munger.getKind() == ResolvedTypeMunger.Parent) {
			changed = mungeNewParent(weaver, (NewParentTypeMunger) munger);
		} else if (munger.getKind() == ResolvedTypeMunger.AnnotationOnType) {
			changed = mungeNewAnnotationOnType(weaver, (AnnotationOnTypeMunger) munger);
			worthReporting = false;
		} else {
			throw new RuntimeException("unimplemented");
		}

		if (changed && munger.changesPublicSignature()) {
			WeaverStateInfo info = weaver.getLazyClassGen().getOrCreateWeaverStateInfo(weaver.getReweavableMode());
			info.addConcreteMunger(this);
		}

		if (changed && worthReporting) {
			ResolvedType declaringAspect = null;
			AsmManager model = ((BcelWorld) getWorld()).getModelAsAsmManager();
			if (model != null) {
				if (munger instanceof NewParentTypeMunger) {
					NewParentTypeMunger nptMunger = (NewParentTypeMunger) munger;
					declaringAspect = nptMunger.getDeclaringType();
					if (declaringAspect.isParameterizedOrGenericType()) {
						declaringAspect = declaringAspect.getRawType();
					}
					ResolvedType thisAspect = getAspectType();
					AsmRelationshipProvider.addRelationship(model, weaver.getLazyClassGen().getType(), munger, thisAspect);

					// Add a relationship on the actual declaring aspect too
					if (!thisAspect.equals(declaringAspect)) {
						// Might be the case the declaring aspect is generic and thisAspect is parameterizing it. In that case
						// record the actual parameterizations

						ResolvedType target = weaver.getLazyClassGen().getType();
						ResolvedType newParent = nptMunger.getNewParent();
						IProgramElement thisAspectNode = model.getHierarchy().findElementForType(thisAspect.getPackageName(),
								thisAspect.getClassName());
						Map<String, List<String>> declareParentsMap = thisAspectNode.getDeclareParentsMap();
						if (declareParentsMap == null) {
							declareParentsMap = new HashMap<>();
							thisAspectNode.setDeclareParentsMap(declareParentsMap);
						}
						String tname = target.getName();
						String pname = newParent.getName();
						List<String> newparents = declareParentsMap.computeIfAbsent(tname, k -> new ArrayList<>());
						newparents.add(pname);
						AsmRelationshipProvider.addRelationship(model, weaver.getLazyClassGen().getType(), munger, declaringAspect);
					}
				} else {
					declaringAspect = getAspectType();
					AsmRelationshipProvider.addRelationship(model, weaver.getLazyClassGen().getType(), munger, declaringAspect);
				}
			}
		}

		// TAG: WeavingMessage
		if (changed && worthReporting && munger != null && !weaver.getWorld().getMessageHandler().isIgnoring(IMessage.WEAVEINFO)) {
			String tName = weaver.getLazyClassGen().getType().getSourceLocation().getSourceFile().getName();
			if (tName.contains("no debug info available")) {
				tName = "no debug info available";
			} else {
				tName = getShortname(weaver.getLazyClassGen().getType().getSourceLocation().getSourceFile().getPath());
			}
			String fName = getShortname(getAspectType().getSourceLocation().getSourceFile().getPath());
			if (munger.getKind().equals(ResolvedTypeMunger.Parent)) {
				// This message could come out of AjLookupEnvironment.addParent
				// if doing parents munging at compile time only...
				NewParentTypeMunger parentTM = (NewParentTypeMunger) munger;
				if (parentTM.isMixin()) {
					weaver.getWorld()
						.getMessageHandler()
						.handleMessage(
							WeaveMessage.constructWeavingMessage(
								WeaveMessage.WEAVEMESSAGE_MIXIN,
								new String[] {
									parentTM.getNewParent().getName(), fName,
									weaver.getLazyClassGen().getType().getName(), tName
								},
								weaver.getLazyClassGen().getClassName(), getAspectType().getName(),
								parentTM.getNewParent().getSourceLocation(), weaver.getLazyClassGen().getType().getSourceLocation()
							)
						);
				}
				else {
					if (parentTM.getNewParent().isInterface()) {
						weaver.getWorld()
							.getMessageHandler()
							.handleMessage(
								WeaveMessage.constructWeavingMessage(
									WeaveMessage.WEAVEMESSAGE_DECLAREPARENTSIMPLEMENTS,
									new String[] {
										weaver.getLazyClassGen().getType().getName(), tName,
										parentTM.getNewParent().getName(), fName
									},
									weaver.getLazyClassGen().getClassName(), getAspectType().getName(),
									parentTM.getNewParent().getSourceLocation(), weaver.getLazyClassGen().getType().getSourceLocation()
								)
							);
					}
					else {
						weaver.getWorld()
								.getMessageHandler()
								.handleMessage(
										WeaveMessage.constructWeavingMessage(WeaveMessage.WEAVEMESSAGE_DECLAREPARENTSEXTENDS,
												new String[] { weaver.getLazyClassGen().getType().getName(), tName,
														parentTM.getNewParent().getName(), fName }));
						// TAG: WeavingMessage DECLARE PARENTS: EXTENDS
						// reportDeclareParentsMessage(WeaveMessage.
						// WEAVEMESSAGE_DECLAREPARENTSEXTENDS,sourceType,parent);

					}
				}
			} else if (munger.getKind().equals(ResolvedTypeMunger.FieldHost)) {
				// hidden
			} else {
				ResolvedMember declaredSig = munger.getSignature();
				String fromString = fName + ":'" + declaredSig + "'";
				// if (declaredSig==null) declaredSig= munger.getSignature();
				String kindString = munger.getKind().toString().toLowerCase();
				if (kindString.equals("innerclass")) {
					kindString = "member class";
					fromString = fName;
				}
				weaver.getWorld()
					.getMessageHandler()
					.handleMessage(
						WeaveMessage.constructWeavingMessage(
							WeaveMessage.WEAVEMESSAGE_ITD,
							new String[] {
								weaver.getLazyClassGen().getType().getName(), tName,
								kindString, getAspectType().getName(), fromString
							},
							weaver.getLazyClassGen().getClassName(), getAspectType().getName(),
							weaver.getLazyClassGen().getType().getSourceLocation(), getAspectType().getSourceLocation()
						)
					);
			}
		}

		CompilationAndWeavingContext.leavingPhase(tok);
		return changed;
	}

	private String getShortname(String path) {
		int takefrom = path.lastIndexOf('/');
		if (takefrom == -1) {
			takefrom = path.lastIndexOf('\\');
		}
		return path.substring(takefrom + 1);
	}

	private boolean mungeNewAnnotationOnType(BcelClassWeaver weaver, AnnotationOnTypeMunger munger) {
		// FIXME asc this has already been done up front, need to do it here too?
		try {
			BcelAnnotation anno = (BcelAnnotation) munger.getNewAnnotation();
			weaver.getLazyClassGen().addAnnotation(anno.getBcelAnnotation());
		} catch (ClassCastException cce) {
			throw new IllegalStateException("DiagnosticsFor318237: The typemunger "+munger+" contains an annotation of type "+
					munger.getNewAnnotation().getClass().getName()+" when it should be a BcelAnnotation",cce);
		}
		return true;
	}

	/**
	 * For a long time, AspectJ did not allow binary weaving of declare parents. This restriction is now lifted but could do with
	 * more testing!
	 */
	private boolean mungeNewParent(BcelClassWeaver weaver, NewParentTypeMunger typeTransformer) {
		LazyClassGen newParentTarget = weaver.getLazyClassGen();
		ResolvedType newParent = typeTransformer.getNewParent();

		boolean performChange = true;
		performChange = enforceDecpRule1_abstractMethodsImplemented(weaver, typeTransformer.getSourceLocation(), newParentTarget,
				newParent);
		performChange = enforceDecpRule2_cantExtendFinalClass(weaver, typeTransformer.getSourceLocation(), newParentTarget,
				newParent) && performChange;

		List<ResolvedMember> methods = newParent.getMethodsWithoutIterator(false, true, false);
		for (ResolvedMember method : methods) {
			if (!method.getName().equals("<init>")) {
				LazyMethodGen subMethod = findMatchingMethod(newParentTarget, method);
				// FIXME asc is this safe for all bridge methods?
				if (subMethod != null && !subMethod.isBridgeMethod()) {
					if (!(subMethod.isSynthetic() && method.isSynthetic())) {
						if (!(subMethod.isStatic() && subMethod.getName().startsWith("access$"))) {
							// ignore generated accessors
							performChange = enforceDecpRule3_visibilityChanges(weaver, newParent, method, subMethod)
									&& performChange;
							performChange = enforceDecpRule4_compatibleReturnTypes(weaver, method, subMethod) && performChange;
							performChange = enforceDecpRule5_cantChangeFromStaticToNonstatic(weaver,
									typeTransformer.getSourceLocation(), method, subMethod)
									&& performChange;
						}
					}
				}
			}
		}
		if (!performChange) {
			// A rule was violated and an error message already reported
			return false;
		}

		if (newParent.isClass()) {
			// Changing the supertype
			if (!attemptToModifySuperCalls(weaver, newParentTarget, newParent)) {
				return false;
			}
			newParentTarget.setSuperClass(newParent);
		} else {
			// Add a new interface
			newParentTarget.addInterface(newParent, getSourceLocation());
		}
		return true;
	}

	/**
	 * Rule 1: For the declare parents to be allowed, the target type must override and implement inherited abstract methods (if the
	 * type is not declared abstract)
	 */
	private boolean enforceDecpRule1_abstractMethodsImplemented(BcelClassWeaver weaver, ISourceLocation mungerLoc,
			LazyClassGen newParentTarget, ResolvedType newParent) {
		// Ignore abstract classes or interfaces
		if (newParentTarget.isAbstract() || newParentTarget.isInterface()) {
			return true;
		}
		boolean ruleCheckingSucceeded = true;
		List<ResolvedMember> newParentMethods = newParent.getMethodsWithoutIterator(false, true, false);
		for (ResolvedMember newParentMethod : newParentMethods) {
			String newParentMethodName = newParentMethod.getName();
			// Ignore abstract ajc$interField prefixed methods
			if (newParentMethod.isAbstract() && !newParentMethodName.startsWith("ajc$interField")) {
				ResolvedMember discoveredImpl = null;
				List<ResolvedMember> targetMethods = newParentTarget.getType().getMethodsWithoutIterator(false, true, false);
				for (ResolvedMember targetMethod : targetMethods) {
					if (!targetMethod.isAbstract() && targetMethod.getName().equals(newParentMethodName)) {
						String newParentMethodSig = newParentMethod.getParameterSignature(); // ([TT;)
						String targetMethodSignature = targetMethod.getParameterSignature(); // ([Ljava/lang/Object;)
						// could be a match
						if (targetMethodSignature.equals(newParentMethodSig)) {
							discoveredImpl = targetMethod;
						} else {
							// Does the erasure match? In which case a bridge method will be created later to
							// satisfy the abstract method
							if (targetMethod.hasBackingGenericMember()
									&& targetMethod.getBackingGenericMember().getParameterSignature().equals(newParentMethodSig)) {
								discoveredImpl = targetMethod;
							} else if (newParentMethod.hasBackingGenericMember()) {
 								if (newParentMethod.getBackingGenericMember().getParameterSignature().equals(targetMethodSignature)) { // newParentMethod.getBackingGenericMember().getParameterSignature gives: (Pjava/util/List<TI;>;)  targetMethodSignature= (Ljava/util/List;)
									discoveredImpl = targetMethod;
								} else if (targetMethod instanceof BcelMethod) {
									// BcelMethod does not have backing generic member set (need to investigate why). For now, special case here:
									UnresolvedType[] targetMethodGenericParameterTypes = targetMethod.getGenericParameterTypes();
									if (targetMethodGenericParameterTypes !=null) {
										StringBuilder b = new StringBuilder("(");
										for (UnresolvedType p: targetMethodGenericParameterTypes) {
											b.append(p.getSignature());
										}
										b.append(')');
										if (b.toString().equals(newParentMethodSig)) {
											discoveredImpl = targetMethod;
										}
									}
								}
							}
						}
						if (discoveredImpl != null) {
							break;
						}
					}
				}
				if (discoveredImpl == null) {
					// didnt find a valid implementation, lets check the
					// ITDs on this type to see if they satisfy it
					boolean satisfiedByITD = false;
					for (ConcreteTypeMunger m : newParentTarget.getType().getInterTypeMungersIncludingSupers()) {
						if (m.getMunger() != null && m.getMunger().getKind() == ResolvedTypeMunger.Method) {
							ResolvedMember sig = m.getSignature();
							if (!Modifier.isAbstract(sig.getModifiers())) {
								// If the ITD shares a type variable with some target type, we need to tailor it
								// for that type
								if (m.isTargetTypeParameterized()) {
									ResolvedType genericOnType = getWorld().resolve(sig.getDeclaringType()).getGenericType();
									ResolvedType actualOccurrence = newParent.discoverActualOccurrenceOfTypeInHierarchy(genericOnType);
									if (actualOccurrence == null) {
									    // Handle the case where the ITD is onto the type targeted by the declare parents (PR478003)
										actualOccurrence = newParentTarget.getType().discoverActualOccurrenceOfTypeInHierarchy(genericOnType);
									}
									m = m.parameterizedFor(actualOccurrence);
									// possible sig change when type parameters filled in
									sig = m.getSignature();
								}
								if (ResolvedType.matches(
										AjcMemberMaker.interMethod(sig, m.getAspectType(),
												sig.getDeclaringType().resolve(weaver.getWorld()).isInterface()), newParentMethod)) {
									satisfiedByITD = true;
								}
							}
						} else if (m.getMunger() != null && m.getMunger().getKind() == ResolvedTypeMunger.MethodDelegate2) {
							// AV - that should be enough, no need to check more
							satisfiedByITD = true;
						}
					}
					if (!satisfiedByITD) {
						error(weaver,
								"The type " + newParentTarget.getName() + " must implement the inherited abstract method "
										+ newParentMethod.getDeclaringType() + "." + newParentMethodName
										+ newParentMethod.getParameterSignature(), newParentTarget.getType().getSourceLocation(),
								new ISourceLocation[] { newParentMethod.getSourceLocation(), mungerLoc });
						ruleCheckingSucceeded = false;
					}
				}
			}
		}
		return ruleCheckingSucceeded;
	}

	/**
	 * Rule 2. Can't extend final types
	 */
	private boolean enforceDecpRule2_cantExtendFinalClass(BcelClassWeaver weaver, ISourceLocation transformerLoc,
			LazyClassGen targetType, ResolvedType newParent) {
		if (newParent.isFinal()) {
			error(weaver, "Cannot make type " + targetType.getName() + " extend final class " + newParent.getName(), targetType
					.getType().getSourceLocation(), new ISourceLocation[] { transformerLoc });
			return false;
		}
		return true;
	}

	/**
	 * Rule 3. Can't narrow visibility of methods when overriding
	 */
	private boolean enforceDecpRule3_visibilityChanges(BcelClassWeaver weaver, ResolvedType newParent, ResolvedMember superMethod,
			LazyMethodGen subMethod) {
		boolean cont = true;
		if (Modifier.isPublic(superMethod.getModifiers())) {
			if (subMethod.isProtected() || subMethod.isDefault() || subMethod.isPrivate()) {
				weaver.getWorld()
						.getMessageHandler()
						.handleMessage(
								MessageUtil.error("Cannot reduce the visibility of the inherited method '" + superMethod
										+ "' from " + newParent.getName(), superMethod.getSourceLocation()));
				cont = false;
			}
		} else if (Modifier.isProtected(superMethod.getModifiers())) {
			if (subMethod.isDefault() || subMethod.isPrivate()) {
				weaver.getWorld()
						.getMessageHandler()
						.handleMessage(
								MessageUtil.error("Cannot reduce the visibility of the inherited method '" + superMethod
										+ "' from " + newParent.getName(), superMethod.getSourceLocation()));
				cont = false;
			}
		} else if (superMethod.isDefault()) {
			if (subMethod.isPrivate()) {
				weaver.getWorld()
						.getMessageHandler()
						.handleMessage(
								MessageUtil.error("Cannot reduce the visibility of the inherited method '" + superMethod
										+ "' from " + newParent.getName(), superMethod.getSourceLocation()));
				cont = false;
			}
		}
		return cont;
	}

	/**
	 * Rule 4. Can't have incompatible return types
	 */
	private boolean enforceDecpRule4_compatibleReturnTypes(BcelClassWeaver weaver, ResolvedMember superMethod,
			LazyMethodGen subMethod) {
		boolean cont = true;
		String superReturnTypeSig = superMethod.getGenericReturnType().getSignature(); // eg. Pjava/util/Collection<LFoo;>
		String subReturnTypeSig = subMethod.getGenericReturnTypeSignature();
		superReturnTypeSig = superReturnTypeSig.replace('.', '/');
		subReturnTypeSig = subReturnTypeSig.replace('.', '/');
		if (!superReturnTypeSig.equals(subReturnTypeSig)) {
			// Check for covariance
			ResolvedType subType = weaver.getWorld().resolve(subMethod.getReturnType());
			ResolvedType superType = weaver.getWorld().resolve(superMethod.getReturnType());
			if (!superType.isAssignableFrom(subType)) {
				weaver.getWorld()
						.getMessageHandler()
						.handleMessage(
								MessageUtil.error("The return type is incompatible with " + superMethod.getDeclaringType() + "."
										+ superMethod.getName() + superMethod.getParameterSignature(),
										subMethod.getSourceLocation()));
				// this just might be a better error message...
				// "The return type '"+subReturnTypeSig+
				// "' is incompatible with the overridden method "
				// +superMethod.getDeclaringType()+"."+
				// superMethod.getName()+superMethod.getParameterSignature()+
				// " which returns '"+superReturnTypeSig+"'",
				cont = false;
			}
		}
		return cont;
	}

	/**
	 * Rule5. Method overrides can't change the staticality (word?) - you can't override and make an instance method static or
	 * override and make a static method an instance method.
	 */
	private boolean enforceDecpRule5_cantChangeFromStaticToNonstatic(BcelClassWeaver weaver, ISourceLocation mungerLoc,
			ResolvedMember superMethod, LazyMethodGen subMethod) {
		boolean superMethodStatic = Modifier.isStatic(superMethod.getModifiers());
		if (superMethodStatic && !subMethod.isStatic()) {
			error(weaver, "This instance method " + subMethod.getName() + subMethod.getParameterSignature()
					+ " cannot override the static method from " + superMethod.getDeclaringType().getName(),
					subMethod.getSourceLocation(), new ISourceLocation[] { mungerLoc });
			return false;
		} else if (!superMethodStatic && subMethod.isStatic()) {
			error(weaver, "The static method " + subMethod.getName() + subMethod.getParameterSignature()
					+ " cannot hide the instance method from " + superMethod.getDeclaringType().getName(),
					subMethod.getSourceLocation(), new ISourceLocation[] { mungerLoc });
			return false;
		}
		return true;
	}

	public void error(BcelClassWeaver weaver, String text, ISourceLocation primaryLoc, ISourceLocation[] extraLocs) {
		IMessage msg = new Message(text, primaryLoc, true, extraLocs);
		weaver.getWorld().getMessageHandler().handleMessage(msg);
	}

	/**
	 * Search the specified type for a particular method - do not use the return value in the comparison as it is not considered for
	 * overriding.
	 */
	private LazyMethodGen findMatchingMethod(LazyClassGen type, ResolvedMember searchMethod) {
		String searchName = searchMethod.getName();
		String searchSig = searchMethod.getParameterSignature();
		for (LazyMethodGen method : type.getMethodGens()) {
			if (method.getName().equals(searchName) && method.getParameterSignature().equals(searchSig)) {
				return method;
			}
		}
		return null;
	}

	/**
	 * The main part of implementing declare parents extends. Modify super ctor calls to target the new type.
	 */
	public boolean attemptToModifySuperCalls(BcelClassWeaver weaver, LazyClassGen newParentTarget, ResolvedType newParent) {
		ResolvedType currentParentType = newParentTarget.getSuperClass();
		if (currentParentType.getGenericType() != null) {
			currentParentType = currentParentType.getGenericType();
		}
		String currentParent = currentParentType.getName();
		if (newParent.getGenericType() != null) {
			newParent = newParent.getGenericType(); // target new super calls at
		}
		// the generic type if its raw or parameterized
		List<LazyMethodGen> mgs = newParentTarget.getMethodGens();

		// Look for ctors to modify
		for (LazyMethodGen aMethod : mgs) {
			if (LazyMethodGen.isConstructor(aMethod)) {
				InstructionList insList = aMethod.getBody();
				InstructionHandle handle = insList.getStart();
				while (handle != null) {
					if (handle.getInstruction().opcode == Constants.INVOKESPECIAL) {
						ConstantPool cpg = newParentTarget.getConstantPool();
						InvokeInstruction invokeSpecial = (InvokeInstruction) handle.getInstruction();
						if (invokeSpecial.getClassName(cpg).equals(currentParent)
								&& invokeSpecial.getMethodName(cpg).equals("<init>")) {
							// System.err.println("Transforming super call '<init>" + invokeSpecial.getSignature(cpg) + "'");

							// 1. Check there is a ctor in the new parent with
							// the same signature
							ResolvedMember newCtor = getConstructorWithSignature(newParent, invokeSpecial.getSignature(cpg));

							if (newCtor == null) {

								// 2. Check ITDCs to see if the necessary ctor is provided that way
								boolean satisfiedByITDC = false;
								for (Iterator<ConcreteTypeMunger> ii = newParentTarget.getType()
										.getInterTypeMungersIncludingSupers().iterator(); ii.hasNext() && !satisfiedByITDC;) {
									ConcreteTypeMunger m = ii.next();
									if (m.getMunger() instanceof NewConstructorTypeMunger) {
										if (m.getSignature().getSignature().equals(invokeSpecial.getSignature(cpg))) {
											satisfiedByITDC = true;
										}
									}
								}

								if (!satisfiedByITDC) {
									String csig = createReadableCtorSig(newParent, cpg, invokeSpecial);
									weaver.getWorld()
											.getMessageHandler()
											.handleMessage(
													MessageUtil.error(
															"Unable to modify hierarchy for " + newParentTarget.getClassName()
																	+ " - the constructor " + csig + " is missing",
															this.getSourceLocation()));
									return false;
								}
							}

							int idx = cpg.addMethodref(newParent.getName(), invokeSpecial.getMethodName(cpg),
									invokeSpecial.getSignature(cpg));
							invokeSpecial.setIndex(idx);
						}
					}
					handle = handle.getNext();
				}
			}
		}
		return true;
	}

	/**
	 * Creates a nice signature for the ctor, something like "(int,Integer,String)"
	 */
	private String createReadableCtorSig(ResolvedType newParent, ConstantPool cpg, InvokeInstruction invokeSpecial) {
		StringBuilder sb = new StringBuilder();
		Type[] ctorArgs = invokeSpecial.getArgumentTypes(cpg);
		sb.append(newParent.getClassName());
		sb.append("(");
		for (int i = 0; i < ctorArgs.length; i++) {
			String argtype = ctorArgs[i].toString();
			if (argtype.lastIndexOf(".") != -1) {
				sb.append(argtype.substring(argtype.lastIndexOf(".") + 1));
			} else {
				sb.append(argtype);
			}
			if (i + 1 < ctorArgs.length) {
				sb.append(",");
			}
		}
		sb.append(")");
		return sb.toString();
	}

	private ResolvedMember getConstructorWithSignature(ResolvedType type, String searchSig) {
		for (ResolvedMember method : type.getDeclaredJavaMethods()) {
			if (MemberUtils.isConstructor(method)) {
				if (method.getSignature().equals(searchSig)) {
					return method;
				}
			}
		}
		return null;
	}

	private boolean mungePrivilegedAccess(BcelClassWeaver weaver, PrivilegedAccessMunger munger) {
		LazyClassGen gen = weaver.getLazyClassGen();
		ResolvedMember member = munger.getMember();

		ResolvedType onType = weaver.getWorld().resolve(member.getDeclaringType(), munger.getSourceLocation());
		if (onType.isRawType()) {
			onType = onType.getGenericType();
		}

		// System.out.println("munging: " + gen + " with " + member);
		if (onType.equals(gen.getType())) {
			if (member.getKind() == Member.FIELD) {
				// System.out.println("matched: " + gen);
				addFieldGetter(gen, member,
						AjcMemberMaker.privilegedAccessMethodForFieldGet(aspectType, member, munger.shortSyntax));
				addFieldSetter(gen, member,
						AjcMemberMaker.privilegedAccessMethodForFieldSet(aspectType, member, munger.shortSyntax));
				return true;
			} else if (member.getKind() == Member.METHOD) {
				addMethodDispatch(gen, member, AjcMemberMaker.privilegedAccessMethodForMethod(aspectType, member));
				return true;
			} else if (member.getKind() == Member.CONSTRUCTOR) {
				for (LazyMethodGen m : gen.getMethodGens()) {
					if (m.getMemberView() != null && m.getMemberView().getKind() == Member.CONSTRUCTOR) {
						// m.getMemberView().equals(member)) {
						m.forcePublic();
						// return true;
					}
				}
				return true;
				// throw new BCException("no match for " + member + " in " +
				// gen);
			} else if (member.getKind() == Member.STATIC_INITIALIZATION) {
				gen.forcePublic();
				return true;
			} else {
				throw new RuntimeException("unimplemented");
			}
		}
		return false;
	}

	private void addFieldGetter(LazyClassGen gen, ResolvedMember field, ResolvedMember accessMethod) {
		LazyMethodGen mg = makeMethodGen(gen, accessMethod);
		InstructionList il = new InstructionList();
		InstructionFactory fact = gen.getFactory();
		if (Modifier.isStatic(field.getModifiers())) {
			il.append(fact.createFieldAccess(gen.getClassName(), field.getName(), BcelWorld.makeBcelType(field.getType()),
					Constants.GETSTATIC));
		} else {
			il.append(InstructionConstants.ALOAD_0);
			il.append(fact.createFieldAccess(gen.getClassName(), field.getName(), BcelWorld.makeBcelType(field.getType()),
					Constants.GETFIELD));
		}
		il.append(InstructionFactory.createReturn(BcelWorld.makeBcelType(field.getType())));
		mg.getBody().insert(il);

		gen.addMethodGen(mg, getSignature().getSourceLocation());
	}

	private void addFieldSetter(LazyClassGen gen, ResolvedMember field, ResolvedMember accessMethod) {
		LazyMethodGen mg = makeMethodGen(gen, accessMethod);
		InstructionList il = new InstructionList();
		InstructionFactory fact = gen.getFactory();
		Type fieldType = BcelWorld.makeBcelType(field.getType());

		if (Modifier.isStatic(field.getModifiers())) {
			il.append(InstructionFactory.createLoad(fieldType, 0));
			il.append(fact.createFieldAccess(gen.getClassName(), field.getName(), fieldType, Constants.PUTSTATIC));
		} else {
			il.append(InstructionConstants.ALOAD_0);
			il.append(InstructionFactory.createLoad(fieldType, 1));
			il.append(fact.createFieldAccess(gen.getClassName(), field.getName(), fieldType, Constants.PUTFIELD));
		}
		il.append(InstructionFactory.createReturn(Type.VOID));
		mg.getBody().insert(il);

		gen.addMethodGen(mg, getSignature().getSourceLocation());
	}

	private void addMethodDispatch(LazyClassGen gen, ResolvedMember method, ResolvedMember accessMethod) {
		LazyMethodGen mg = makeMethodGen(gen, accessMethod);
		InstructionList il = new InstructionList();
		InstructionFactory fact = gen.getFactory();
		Type[] paramTypes = BcelWorld.makeBcelTypes(method.getParameterTypes());

		int pos = 0;

		if (!Modifier.isStatic(method.getModifiers())) {
			il.append(InstructionConstants.ALOAD_0);
			pos++;
		}
		for (Type paramType : paramTypes) {
			il.append(InstructionFactory.createLoad(paramType, pos));
			pos += paramType.getSize();
		}
		il.append(Utility.createInvoke(fact, (BcelWorld) aspectType.getWorld(), method));
		il.append(InstructionFactory.createReturn(BcelWorld.makeBcelType(method.getReturnType())));

		mg.getBody().insert(il);

		gen.addMethodGen(mg);
	}

	protected LazyMethodGen makeMethodGen(LazyClassGen gen, ResolvedMember member) {
		try {
			Type returnType = BcelWorld.makeBcelType(member.getReturnType());
			Type[] parameterTypes = BcelWorld.makeBcelTypes(member.getParameterTypes());
			LazyMethodGen ret = new LazyMethodGen(member.getModifiers(), returnType,
					member.getName(), parameterTypes, UnresolvedType.getNames(member
							.getExceptions()), gen);

			// 43972 : Static crosscutting makes interfaces unusable for javac
			// ret.makeSynthetic();
			return ret;
		} catch (ClassFormatException cfe) {
			throw new RuntimeException("Problem with makeMethodGen for method "+member.getName()+" in type "+gen.getName()+"  ret="+member.getReturnType(),cfe);
		}
	}

	protected FieldGen makeFieldGen(LazyClassGen gen, ResolvedMember member) {
		return new FieldGen(member.getModifiers(), BcelWorld.makeBcelType(member.getReturnType()), member.getName(),
				gen.getConstantPool());
	}

	private boolean mungePerObjectInterface(BcelClassWeaver weaver, PerObjectInterfaceTypeMunger munger) {
		// System.err.println("Munging perobject ["+munger+"] onto "+weaver.
		// getLazyClassGen().getClassName());
		LazyClassGen gen = weaver.getLazyClassGen();

		if (couldMatch(gen.getBcelObjectType(), munger.getTestPointcut())) {
			FieldGen fg = makeFieldGen(gen, AjcMemberMaker.perObjectField(gen.getType(), aspectType));

			gen.addField(fg, getSourceLocation());

			Type fieldType = BcelWorld.makeBcelType(aspectType);
			LazyMethodGen mg = new LazyMethodGen(Modifier.PUBLIC, fieldType, NameMangler.perObjectInterfaceGet(aspectType),
					Type.NO_ARGS, new String[0], gen);
			InstructionList il = new InstructionList();
			InstructionFactory fact = gen.getFactory();
			il.append(InstructionConstants.ALOAD_0);
			il.append(fact.createFieldAccess(gen.getClassName(), fg.getName(), fieldType, Constants.GETFIELD));
			il.append(InstructionFactory.createReturn(fieldType));
			mg.getBody().insert(il);

			gen.addMethodGen(mg);

			LazyMethodGen mg1 = new LazyMethodGen(Modifier.PUBLIC, Type.VOID, NameMangler.perObjectInterfaceSet(aspectType),

			new Type[] { fieldType, }, new String[0], gen);
			InstructionList il1 = new InstructionList();
			il1.append(InstructionConstants.ALOAD_0);
			il1.append(InstructionFactory.createLoad(fieldType, 1));
			il1.append(fact.createFieldAccess(gen.getClassName(), fg.getName(), fieldType, Constants.PUTFIELD));
			il1.append(InstructionFactory.createReturn(Type.VOID));
			mg1.getBody().insert(il1);

			gen.addMethodGen(mg1);

			gen.addInterface(munger.getInterfaceType().resolve(weaver.getWorld()), getSourceLocation());

			return true;
		} else {
			return false;
		}
	}

	// PTWIMPL Add field to hold aspect instance and an accessor
	private boolean mungePerTypeWithinTransformer(BcelClassWeaver weaver) {
		LazyClassGen gen = weaver.getLazyClassGen();

		// if (couldMatch(gen.getBcelObjectType(), munger.getTestPointcut())) {

		// Add (to the target type) the field that will hold the aspect instance
		// e.g ajc$com_blah_SecurityAspect$ptwAspectInstance
		FieldGen fg = makeFieldGen(gen, AjcMemberMaker.perTypeWithinField(gen.getType(), aspectType));
		gen.addField(fg, getSourceLocation());
		if (!gen.getType().canBeSeenBy(aspectType) && aspectType.isPrivilegedAspect()) {
			gen.forcePublic();
		}
		// Add an accessor for this new field, the
		// ajc$<aspectname>$localAspectOf() method
		// e.g.
		// "public com_blah_SecurityAspect ajc$com_blah_SecurityAspect$localAspectOf()"
		Type fieldType = BcelWorld.makeBcelType(aspectType);
		LazyMethodGen mg = new LazyMethodGen(Modifier.PUBLIC | Modifier.STATIC, fieldType,
				NameMangler.perTypeWithinLocalAspectOf(aspectType), Type.NO_ARGS, new String[0], gen);
		InstructionList il = new InstructionList();
		// PTWIMPL ?? Should check if it is null and throw
		// NoAspectBoundException
		InstructionFactory fact = gen.getFactory();
		il.append(fact.createFieldAccess(gen.getClassName(), fg.getName(), fieldType, Constants.GETSTATIC));
		il.append(InstructionFactory.createReturn(fieldType));
		mg.getBody().insert(il);
		gen.addMethodGen(mg);
		return true;
		// } else {
		// return false;
		// }
	}

	// ??? Why do we have this method? I thought by now we would know if it
	// matched or not
	private boolean couldMatch(BcelObjectType bcelObjectType, Pointcut pointcut) {
		return !bcelObjectType.isInterface();
	}

	private boolean mungeNewMemberType(BcelClassWeaver classWeaver, NewMemberClassTypeMunger munger) {
		World world = classWeaver.getWorld();
		ResolvedType onType = world.resolve(munger.getTargetType());
		if (onType.isRawType()) {
			onType = onType.getGenericType();
		}
		return onType.equals(classWeaver.getLazyClassGen().getType());
	}

	private boolean mungeNewMethod(BcelClassWeaver classWeaver, NewMethodTypeMunger munger) {
		World world = classWeaver.getWorld();

		// Resolving it will sort out the tvars
		ResolvedMember unMangledInterMethod = munger.getSignature().resolve(world);

		// do matching on the unMangled one, but actually add them to the mangled method
		ResolvedMember interMethodBody = munger.getDeclaredInterMethodBody(aspectType, world);
		ResolvedMember interMethodDispatcher = munger.getDeclaredInterMethodDispatcher(aspectType, world);
		ResolvedMember memberHoldingAnyAnnotations = interMethodDispatcher;
		LazyClassGen classGen = classWeaver.getLazyClassGen();

		ResolvedType onType = world.resolve(unMangledInterMethod.getDeclaringType(), munger.getSourceLocation());
		if (onType.isRawType()) {
			onType = onType.getGenericType();
		}

		// Simple checks, can't ITD on annotations or enums
		if (onType.isAnnotation()) {
			signalError(WeaverMessages.ITDM_ON_ANNOTATION_NOT_ALLOWED, classWeaver, onType);
			return false;
		}

		if (onType.isEnum()) {
			signalError(WeaverMessages.ITDM_ON_ENUM_NOT_ALLOWED, classWeaver, onType);
			return false;
		}

		boolean mungingInterface = classGen.isInterface();
		boolean onInterface = onType.isInterface();

		if (onInterface
				&& classGen.getLazyMethodGen(unMangledInterMethod.getName(), unMangledInterMethod.getSignature(), true) != null) {
			// this is ok, we could be providing the default implementation of a
			// method
			// that the target has already declared
			return false;
		}

		// If we are processing the intended ITD target type (might be an interface)
		if (onType.equals(classGen.getType())) {
			ResolvedMember mangledInterMethod = AjcMemberMaker.interMethod(unMangledInterMethod, aspectType, onInterface);

			LazyMethodGen newMethod = makeMethodGen(classGen, mangledInterMethod);
			if (mungingInterface) {
				// we want the modifiers of the ITD to be used for all *implementors* of the
				// interface, but the method itself we add to the interface must be public abstract
				newMethod.setAccessFlags(Modifier.PUBLIC | Modifier.ABSTRACT);
			}

			// pr98901
			// For copying the annotations across, we have to discover the real
			// member in the aspect which is holding them.
			if (classWeaver.getWorld().isInJava5Mode()) {
				AnnotationAJ annotationsOnRealMember[] = null;
				ResolvedType toLookOn = aspectType;
				if (aspectType.isRawType()) {
					toLookOn = aspectType.getGenericType();
				}
				ResolvedMember realMember = getRealMemberForITDFromAspect(toLookOn, memberHoldingAnyAnnotations, false);
				// 266602 - consider it missing to mean that the corresponding aspect had errors
				if (realMember == null) {
					// signalWarning("Unable to apply any annotations attached to " + munger.getSignature(), weaver);
					// throw new BCException("Couldn't find ITD init member '" + interMethodBody + "' on aspect " + aspectType);
				} else {
					annotationsOnRealMember = realMember.getAnnotations();
				}
				Set<ResolvedType> addedAnnotations = new HashSet<>();
				if (annotationsOnRealMember != null) {
					for (AnnotationAJ anno : annotationsOnRealMember) {
						AnnotationGen a = ((BcelAnnotation) anno).getBcelAnnotation();
						AnnotationGen ag = new AnnotationGen(a, classGen.getConstantPool(), true);
						newMethod.addAnnotation(new BcelAnnotation(ag, classWeaver.getWorld()));
						addedAnnotations.add(anno.getType());
					}
				}
				if (realMember != null) {
					copyOverParameterAnnotations(newMethod, realMember);
				}
				// the code below was originally added to cope with the case where an aspect declares an annotation on an ITD
				// declared within itself (an unusual situation). However, it also addresses the case where we may not find the
				// annotation on the real representation of the ITD. This can happen in a load-time weaving situation where
				// we couldn't add the annotation in time - and so here we recheck the declare annotations. Not quite ideal but
				// works. pr288635
				List<DeclareAnnotation> allDecams = world.getDeclareAnnotationOnMethods();
				for (DeclareAnnotation declareAnnotationMC : allDecams) {
					if (declareAnnotationMC.matches(unMangledInterMethod, world)) {
						// && newMethod.getEnclosingClass().getType() == aspectType) {
						AnnotationAJ annotation = declareAnnotationMC.getAnnotation();
						if (!addedAnnotations.contains(annotation.getType())) {
							newMethod.addAnnotation(annotation);
						}
					}
				}
			}

			// If it doesn't target an interface and there is a body (i.e. it isnt abstract)
			if (!onInterface && !Modifier.isAbstract(mangledInterMethod.getModifiers())) {
				InstructionList body = newMethod.getBody();
				InstructionFactory fact = classGen.getFactory();
				int pos = 0;

				if (!Modifier.isStatic(unMangledInterMethod.getModifiers())) {
					body.append(InstructionFactory.createThis());
					pos++;
				}
				Type[] paramTypes = BcelWorld.makeBcelTypes(mangledInterMethod.getParameterTypes());
				for (Type paramType : paramTypes) {
					body.append(InstructionFactory.createLoad(paramType, pos));
					pos += paramType.getSize();
				}
				body.append(Utility.createInvoke(fact, classWeaver.getWorld(), interMethodBody));
				body.append(InstructionFactory.createReturn(BcelWorld.makeBcelType(mangledInterMethod.getReturnType())));

				if (classWeaver.getWorld().isInJava5Mode()) { // Don't need bridge
					// methods if not in
					// 1.5 mode.
					createAnyBridgeMethodsForCovariance(classWeaver, munger, unMangledInterMethod, onType, classGen, paramTypes);
				}

			} else {
				// ??? this is okay
				// if (!(mg.getBody() == null)) throw new
				// RuntimeException("bas");
			}

			if (world.isInJava5Mode()) {
				String basicSignature = mangledInterMethod.getSignature();
				String genericSignature = ((ResolvedMemberImpl) mangledInterMethod).getSignatureForAttribute();
				if (!basicSignature.equals(genericSignature)) {
					// Add a signature attribute to it
					newMethod.addAttribute(createSignatureAttribute(classGen.getConstantPool(), genericSignature));
				}
			}
			// XXX make sure to check that we set exceptions properly on this
			// guy.
			classWeaver.addLazyMethodGen(newMethod);
			classWeaver.getLazyClassGen().warnOnAddedMethod(newMethod.getMethod(), getSignature().getSourceLocation());

			addNeededSuperCallMethods(classWeaver, onType, munger.getSuperMethodsCalled());

			return true;

		} else if (onInterface && !Modifier.isAbstract(unMangledInterMethod.getModifiers())) {

			// This means the 'gen' should be the top most implementor
			// - if it is *not* then something went wrong after we worked
			// out that it was the top most implementor (see pr49657)
			if (!classGen.getType().isTopmostImplementor(onType)) {
				ResolvedType rtx = classGen.getType().getTopmostImplementor(onType);
				if (rtx == null) {
					// pr302460
					// null means there is something wrong with what we are looking at
					ResolvedType rt = classGen.getType();
					if (rt.isInterface()) {
						ISourceLocation sloc = munger.getSourceLocation();
						classWeaver
								.getWorld()
								.getMessageHandler()
								.handleMessage(
										MessageUtil.error(
												"ITD target "
														+ rt.getName()
														+ " is an interface but has been incorrectly determined to be the topmost implementor of "
														+ onType.getName() + ". ITD is " + this.getSignature(), sloc));
					}
					if (!onType.isAssignableFrom(rt)) {
						ISourceLocation sloc = munger.getSourceLocation();
						classWeaver
								.getWorld()
								.getMessageHandler()
								.handleMessage(
										MessageUtil.error(
												"ITD target " + rt.getName() + " doesn't appear to implement " + onType.getName()
														+ " why did we consider it the top most implementor? ITD is "
														+ this.getSignature(), sloc));
					}
				} else if (!rtx.isExposedToWeaver()) {
					ISourceLocation sLoc = munger.getSourceLocation();
					classWeaver
							.getWorld()
							.getMessageHandler()
							.handleMessage(
									MessageUtil.error(WeaverMessages.format(WeaverMessages.ITD_NON_EXPOSED_IMPLEMENTOR, rtx,
											getAspectType().getName()), (sLoc == null ? getAspectType().getSourceLocation() : sLoc)));
				} else {
					// XXX what does this state mean?
					// We have incorrectly identified what is the top most
					// implementor and its not because
					// a type wasn't exposed to the weaver
				}
				return false;
			} else {

				ResolvedMember mangledInterMethod = AjcMemberMaker.interMethod(unMangledInterMethod, aspectType, false);

				LazyMethodGen mg = makeMethodGen(classGen, mangledInterMethod);

				// From 98901#29 - need to copy annotations across
				if (classWeaver.getWorld().isInJava5Mode()) {
					AnnotationAJ annotationsOnRealMember[] = null;
					ResolvedType toLookOn = aspectType;
					if (aspectType.isRawType()) {
						toLookOn = aspectType.getGenericType();
					}
					ResolvedMember realMember = getRealMemberForITDFromAspect(toLookOn, memberHoldingAnyAnnotations, false);
					if (realMember == null) {
						throw new BCException("Couldn't find ITD holder member '" + memberHoldingAnyAnnotations + "' on aspect "
								+ aspectType);
					}
					annotationsOnRealMember = realMember.getAnnotations();

					if (annotationsOnRealMember != null) {
						for (AnnotationAJ annotationX : annotationsOnRealMember) {
							AnnotationGen a = ((BcelAnnotation) annotationX).getBcelAnnotation();
							AnnotationGen ag = new AnnotationGen(a, classWeaver.getLazyClassGen().getConstantPool(), true);
							mg.addAnnotation(new BcelAnnotation(ag, classWeaver.getWorld()));
						}
					}

					copyOverParameterAnnotations(mg, realMember);
				}

				if (mungingInterface) {
					// we want the modifiers of the ITD to be used for all
					// *implementors* of the
					// interface, but the method itself we add to the interface
					// must be public abstract
					mg.setAccessFlags(Modifier.PUBLIC | Modifier.ABSTRACT);
				}

				Type[] paramTypes = BcelWorld.makeBcelTypes(mangledInterMethod.getParameterTypes());
				Type returnType = BcelWorld.makeBcelType(mangledInterMethod.getReturnType());

				InstructionList body = mg.getBody();
				InstructionFactory fact = classGen.getFactory();
				int pos = 0;

				if (!Modifier.isStatic(mangledInterMethod.getModifiers())) {
					body.append(InstructionFactory.createThis());
					pos++;
				}
				for (Type paramType : paramTypes) {
					body.append(InstructionFactory.createLoad(paramType, pos));
					pos += paramType.getSize();
				}

				body.append(Utility.createInvoke(fact, classWeaver.getWorld(), interMethodBody));
				Type t = BcelWorld.makeBcelType(interMethodBody.getReturnType());
				if (!t.equals(returnType)) {
					body.append(fact.createCast(t, returnType));
				}
				body.append(InstructionFactory.createReturn(returnType));
				mg.definingType = onType;

				if (world.isInJava5Mode()) {
					String basicSignature = mangledInterMethod.getSignature();
					String genericSignature = ((ResolvedMemberImpl) mangledInterMethod).getSignatureForAttribute();
					if (!basicSignature.equals(genericSignature)) {
						// Add a signature attribute to it
						mg.addAttribute(createSignatureAttribute(classGen.getConstantPool(), genericSignature));
					}
				}

				classWeaver.addOrReplaceLazyMethodGen(mg);

				addNeededSuperCallMethods(classWeaver, onType, munger.getSuperMethodsCalled());

				// Work out if we need a bridge method for the new method added to the topmostimplementor.

				// Check if the munger being processed is a parameterized form of the original munger
				createBridgeIfNecessary(classWeaver, munger, unMangledInterMethod, classGen);

				return true;
			}
		} else {
			return false;
		}
	}

	private void createBridgeIfNecessary(BcelClassWeaver classWeaver, NewMethodTypeMunger munger,
			ResolvedMember unMangledInterMethod, LazyClassGen classGen) {
		if (munger.getDeclaredSignature() != null) {
			boolean needsbridging = false;
			ResolvedMember mungerSignature = munger.getSignature();
			ResolvedMember toBridgeTo = munger.getDeclaredSignature().parameterizedWith(null,
					mungerSignature.getDeclaringType().resolve(getWorld()), false, munger.getTypeVariableAliases());
			if (!toBridgeTo.getReturnType().getErasureSignature().equals(mungerSignature.getReturnType().getErasureSignature())) {
				needsbridging = true;
			}
			UnresolvedType[] originalParams = toBridgeTo.getParameterTypes();
			UnresolvedType[] newParams = mungerSignature.getParameterTypes();
			for (int ii = 0; ii < originalParams.length; ii++) {
				if (!originalParams[ii].getErasureSignature().equals(newParams[ii].getErasureSignature())) {
					needsbridging = true;
				}
			}
			if (needsbridging) {
				createBridge(classWeaver, unMangledInterMethod, classGen, toBridgeTo);
			}
		}
	}

	private void copyOverParameterAnnotations(LazyMethodGen receiverMethod, ResolvedMember donorMethod) {
		AnnotationAJ[][] pAnnos = donorMethod.getParameterAnnotations();
		if (pAnnos != null) {
			int offset = receiverMethod.isStatic() ? 0 : 1;
			int param = 0;
			for (int i = offset; i < pAnnos.length; i++) {
				AnnotationAJ[] annosOnParam = pAnnos[i];
				if (annosOnParam != null) {
					for (AnnotationAJ anno : annosOnParam) {
						receiverMethod.addParameterAnnotation(param, anno);
					}
				}
				param++;
			}
		}
	}

	private void createBridge(BcelClassWeaver weaver, ResolvedMember unMangledInterMethod, LazyClassGen classGen,
			ResolvedMember toBridgeTo) {
		Type[] paramTypes;
		Type returnType;
		InstructionList body;
		InstructionFactory fact;
		int pos;
		ResolvedMember bridgerMethod = AjcMemberMaker.bridgerToInterMethod(unMangledInterMethod, classGen.getType());
		ResolvedMember bridgingSetter = AjcMemberMaker.interMethodBridger(toBridgeTo, aspectType, false); // pr250493

		LazyMethodGen bridgeMethod = makeMethodGen(classGen, bridgingSetter);
		paramTypes = BcelWorld.makeBcelTypes(bridgingSetter.getParameterTypes());
		Type[] bridgingToParms = BcelWorld.makeBcelTypes(unMangledInterMethod.getParameterTypes());
		returnType = BcelWorld.makeBcelType(bridgingSetter.getReturnType());
		body = bridgeMethod.getBody();
		fact = classGen.getFactory();
		pos = 0;
		if (!Modifier.isStatic(bridgingSetter.getModifiers())) {
			body.append(InstructionFactory.createThis());
			pos++;
		}
		for (int i = 0, len = paramTypes.length; i < len; i++) {
			Type paramType = paramTypes[i];
			body.append(InstructionFactory.createLoad(paramType, pos));
			if (!bridgingSetter.getParameterTypes()[i].getErasureSignature().equals(
					unMangledInterMethod.getParameterTypes()[i].getErasureSignature())) {
				// System.err.println("Putting in cast from "+
				// paramType+" to "+bridgingToParms[i]);
				body.append(fact.createCast(paramType, bridgingToParms[i]));
			}
			pos += paramType.getSize();
		}

		body.append(Utility.createInvoke(fact, weaver.getWorld(), bridgerMethod));
		body.append(InstructionFactory.createReturn(returnType));
		classGen.addMethodGen(bridgeMethod);
		// mg.definingType = onType;
	}

	/**
	 * Helper method to create a signature attribute based on a string signature: e.g. "Ljava/lang/Object;LI<Ljava/lang/Double;>;"
	 */
	private Signature createSignatureAttribute(ConstantPool cp, String signature) {
		int nameIndex = cp.addUtf8("Signature");
		int sigIndex = cp.addUtf8(signature);
		return new Signature(nameIndex, 2, sigIndex, cp);
	}

	/**
	 * Create any bridge method required because of covariant returns being used. This method is used in the case where an ITD is
	 * applied to some type and it may be in an override relationship with a method from the supertype - but due to covariance there
	 * is a mismatch in return values. Example of when required: Super defines: Object m(String s) Sub defines: String m(String s)
	 * then we need a bridge method in Sub called 'Object m(String s)' that forwards to 'String m(String s)'
	 */
	private void createAnyBridgeMethodsForCovariance(BcelClassWeaver weaver, NewMethodTypeMunger munger,
			ResolvedMember unMangledInterMethod, ResolvedType onType, LazyClassGen gen, Type[] paramTypes) {
		// PERFORMANCE BOTTLENECK? Might need investigating, method analysis
		// between types in a hierarchy just seems expensive...
		// COVARIANCE BRIDGING
		// Algorithm: Step1. Check in this type - has someone already created
		// the bridge method?
		// Step2. Look above us - do we 'override' a method and yet differ in
		// return type (i.e. covariance)
		// Step3. Create a forwarding bridge method
		// ResolvedType superclass = onType.getSuperclass();
		boolean quitRightNow = false;

		String localMethodName = unMangledInterMethod.getName();
		String erasedSig = unMangledInterMethod.getSignatureErased(); // will be something like (LSuperB;)LFoo;
		String localParameterSig = erasedSig.substring(0,erasedSig.lastIndexOf(')')+1);//unMangledInterMethod.getParameterSignature();
		// getParameterSignatureErased() does not include parens, which we do need.
		String localReturnTypeESig = unMangledInterMethod.getReturnType().getErasureSignature();

		// Step1
		boolean alreadyDone = false; // Compiler might have done it
		ResolvedMember[] localMethods = onType.getDeclaredMethods();
		for (ResolvedMember member : localMethods) {
			if (member.getName().equals(localMethodName)) {
				// Check the params
				if (member.getParameterSignature().equals(localParameterSig)) {
					alreadyDone = true;
				}
			}
		}

		// Step2
		if (!alreadyDone) {
			// Use the iterator form of 'getMethods()' so we do as little work as necessary
			ResolvedType supertype = onType.getSuperclass();
			if (supertype != null) {
				for (Iterator<ResolvedMember> iter = supertype.getMethods(true, true); iter.hasNext() && !quitRightNow;) {
					ResolvedMember aMethod = iter.next();
					if (aMethod.getName().equals(localMethodName) && aMethod.getParameterSignature().equals(localParameterSig)) {
						// check the return types, if they are different we need a
						// bridging method.
						if (!aMethod.getReturnType().getErasureSignature().equals(localReturnTypeESig)
								&& !Modifier.isPrivate(aMethod.getModifiers())) {
							// Step3
							createBridgeMethod(weaver.getWorld(), munger, unMangledInterMethod, gen, paramTypes, aMethod);
							quitRightNow = true;
						}
					}
				}
			}
		}
	}

	/**
	 * Create a bridge method for a particular munger.
	 *
	 * @param world
	 * @param munger
	 * @param unMangledInterMethod the method to bridge 'to' that we have already created in the 'subtype'
	 * @param clazz the class in which to put the bridge method
	 * @param paramTypes Parameter types for the bridge method, passed in as an optimization since the caller is likely to have
	 *        already created them.
	 * @param theBridgeMethod
	 */
	private void createBridgeMethod(BcelWorld world, NewMethodTypeMunger munger, ResolvedMember unMangledInterMethod,
			LazyClassGen clazz, Type[] paramTypes, ResolvedMember theBridgeMethod) {
		InstructionList body;
		InstructionFactory fact;
		int pos = 0;

		// The bridge method in this type will have the same signature as the one in the supertype
		LazyMethodGen bridgeMethod = makeMethodGen(clazz, theBridgeMethod);
		bridgeMethod.setAccessFlags(bridgeMethod.getAccessFlags() | 0x00000040 /* BRIDGE = 0x00000040 */);
		// UnresolvedType[] newParams = munger.getSignature().getParameterTypes();
		Type returnType = BcelWorld.makeBcelType(theBridgeMethod.getReturnType());
		body = bridgeMethod.getBody();
		fact = clazz.getFactory();

		if (!Modifier.isStatic(unMangledInterMethod.getModifiers())) {
			body.append(InstructionFactory.createThis());
			pos++;
		}
		for (Type paramType : paramTypes) {
			body.append(InstructionFactory.createLoad(paramType, pos));
			// if (!bridgingSetter.getParameterTypes()[i].getErasureSignature().
			// equals
			// (unMangledInterMethod.getParameterTypes()[i].getErasureSignature
			// ())) {
			// System.err.println("Putting in cast from "+paramType+" to "+
			// bridgingToParms[i]);
			// body.append(fact.createCast(paramType,bridgingToParms[i]));
			// }
			pos += paramType.getSize();
		}

		body.append(Utility.createInvoke(fact, world, unMangledInterMethod));
		body.append(InstructionFactory.createReturn(returnType));
		clazz.addMethodGen(bridgeMethod);
	}

	// Unlike toString() on a member, this does not include the declaring type
	private String stringifyMember(ResolvedMember member) {
		StringBuilder buf = new StringBuilder();
		buf.append(member.getReturnType().getName());
		buf.append(' ');
		buf.append(member.getName());
		if (member.getKind() != Member.FIELD) {
			buf.append("(");
			UnresolvedType[] params = member.getParameterTypes();
			if (params.length != 0) {
				buf.append(params[0]);
				for (int i = 1, len = params.length; i < len; i++) {
					buf.append(", ");
					buf.append(params[i].getName());
				}
			}
			buf.append(")");
		}
		return buf.toString();
	}

	private boolean mungeMethodDelegate(BcelClassWeaver weaver, MethodDelegateTypeMunger munger) {
		World world = weaver.getWorld();

		LazyClassGen gen = weaver.getLazyClassGen();
		if (gen.getType().isAnnotation() || gen.getType().isEnum()) {
			// don't signal error as it could be a consequence of a wild type pattern
			return false;
		}

		ResolvedMember introduced = munger.getSignature();

		ResolvedType fromType = world.resolve(introduced.getDeclaringType(), munger.getSourceLocation());
		if (fromType.isRawType()) {
			fromType = fromType.getGenericType();
		}

		boolean shouldApply = munger.matches(weaver.getLazyClassGen().getType(), aspectType);

		if (shouldApply) {
			Type bcelReturnType = BcelWorld.makeBcelType(introduced.getReturnType());

			// If no implementation class was specified, the intention was that
			// the types matching the pattern
			// already implemented the interface, let's check that now!
			if (munger.getImplClassName() == null && !munger.specifiesDelegateFactoryMethod()) {
				boolean isOK = false;
				List<LazyMethodGen> existingMethods = gen.getMethodGens();
				for (LazyMethodGen m : existingMethods) {
					if (m.getName().equals(introduced.getName())
							&& m.getParameterSignature().equals(introduced.getParameterSignature())
							&& m.getReturnType().equals(bcelReturnType)) {
						isOK = true;
					}
				}
				if (!isOK) {
					// the class does not implement this method, they needed to
					// supply a default impl class
					IMessage msg = new Message("@DeclareParents: No defaultImpl was specified but the type '" + gen.getName()
							+ "' does not implement the method '" + stringifyMember(introduced) + "' defined on the interface '"
							+ introduced.getDeclaringType() + "'", weaver.getLazyClassGen().getType().getSourceLocation(), true,
							new ISourceLocation[] { munger.getSourceLocation() });
					weaver.getWorld().getMessageHandler().handleMessage(msg);
					return false;
				}

				return true;
			}

			LazyMethodGen mg = new LazyMethodGen(introduced.getModifiers() - Modifier.ABSTRACT, bcelReturnType,
					introduced.getName(), BcelWorld.makeBcelTypes(introduced.getParameterTypes()),
					BcelWorld.makeBcelTypesAsClassNames(introduced.getExceptions()), gen);

			// annotation copy from annotation on ITD interface
			if (weaver.getWorld().isInJava5Mode()) {
				AnnotationAJ annotationsOnRealMember[] = null;
				ResolvedType toLookOn = weaver.getWorld().lookupOrCreateName(introduced.getDeclaringType());
				if (fromType.isRawType()) {
					toLookOn = fromType.getGenericType();
				}
				// lookup the method
				ResolvedMember[] ms = toLookOn.getDeclaredJavaMethods();
				for (ResolvedMember m : ms) {
					if (introduced.getName().equals(m.getName()) && introduced.getSignature().equals(m.getSignature())) {
						annotationsOnRealMember = m.getAnnotations();
						break;
					}
				}
				if (annotationsOnRealMember != null) {
					for (AnnotationAJ anno : annotationsOnRealMember) {
						AnnotationGen a = ((BcelAnnotation) anno).getBcelAnnotation();
						AnnotationGen ag = new AnnotationGen(a, weaver.getLazyClassGen().getConstantPool(), true);
						mg.addAnnotation(new BcelAnnotation(ag, weaver.getWorld()));
					}
				}
			}

			InstructionList body = new InstructionList();
			InstructionFactory fact = gen.getFactory();

			// Create a delegate method body which basically looks as follows:
			//
			// public void methodOne() {
			//   if (this.ajc$instance$MyAspect$MyMixin == null) {
			//     synchronized(this) {
			//       if (this.ajc$instance$MyAspect$MyMixin == null) {
			//         this.ajc$instance$MyAspect$MyMixin = MyAspect.aspectOf().createImplementation(this);
			//       }
			//     }
			//   }
			//   this.ajc$instance$MyAspect$MyMixin.methodOne();
			// }

			// Before synchronising on 'this', perform a preliminary null check on the delegate field. Only if it is null,
			// it makes sense to synchronise, then check for null again and initialise the delegate, if null.
			body.append(InstructionConstants.ALOAD_0);
			body.append(Utility.createGet(fact, munger.getDelegate(weaver.getLazyClassGen().getType())));
			InstructionBranch outerIfNonNull = InstructionFactory.createBranchInstruction(Constants.IFNONNULL, null);
			body.append(outerIfNonNull);

			// Wrap delegate field initialisation in 'synchronized(this)' block - MONITORENTER (beginning of 'try')
			body.append(InstructionConstants.ALOAD_0);
			body.append(InstructionConstants.MONITORENTER);

			// The JVM spec requires us add an exception handler ensuring MONITOREXIT in case of an exception inside the
			// synchronized block, see https://docs.oracle.com/javase/specs/jvms/se17/html/jvms-3.html#jvms-3.14.
			InstructionHandle tryStart = body.append(InstructionConstants.ALOAD_0);
			body.append(Utility.createGet(fact, munger.getDelegate(weaver.getLazyClassGen().getType())));
			InstructionBranch innerIfNonNull = InstructionFactory.createBranchInstruction(Constants.IFNONNULL, null);
			body.append(innerIfNonNull);

			// Create and store a new instance
			body.append(InstructionConstants.ALOAD_0); // 'this' is where we'll store the field value

			// TODO for non-static case, call aspectOf() then call the factory method on the retval
			// TODO decide whether the value can really be cached

			// locate the aspect and call the static method in it
			if (munger.specifiesDelegateFactoryMethod()) {
				ResolvedMember rm = munger.getDelegateFactoryMethod(weaver.getWorld());

				// Check the method parameter is compatible with the type of the instance to be passed
				if (rm.getArity() != 0) {
					ResolvedType parameterType = rm.getParameterTypes()[0].resolve(weaver.getWorld());
					if (!parameterType.isAssignableFrom(weaver.getLazyClassGen().getType())) {
						signalError("For mixin factory method '" + rm + "': Instance type '" + weaver.getLazyClassGen().getType()
								+ "' is not compatible with factory parameter type '" + parameterType + "'", weaver);
						return false;
					}
				}
				if (Modifier.isStatic(rm.getModifiers())) {
					if (rm.getArity() != 0) {
						body.append(InstructionConstants.ALOAD_0);
					}
					body.append(fact.createInvoke(rm.getDeclaringType().getName(), rm.getName(), rm.getSignature(),
							Constants.INVOKESTATIC));
					body.append(Utility.createSet(fact, munger.getDelegate(weaver.getLazyClassGen().getType())));
				} else {
					// Need to call aspectOf() to obtain the aspect instance then call the factory method upon that
					UnresolvedType theAspect = munger.getAspect();
					body.append(fact.createInvoke(theAspect.getName(), "aspectOf", "()" + theAspect.getSignature(),
							Constants.INVOKESTATIC));
					if (rm.getArity() != 0) {
						body.append(InstructionConstants.ALOAD_0);
					}
					body.append(fact.createInvoke(rm.getDeclaringType().getName(), rm.getName(), rm.getSignature(),
							Constants.INVOKEVIRTUAL));
					body.append(Utility.createSet(fact, munger.getDelegate(weaver.getLazyClassGen().getType())));
				}
			} else {
				body.append(fact.createNew(munger.getImplClassName()));
				body.append(InstructionConstants.DUP);
				body.append(fact.createInvoke(munger.getImplClassName(), "<init>", Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL));
				body.append(Utility.createSet(fact, munger.getDelegate(weaver.getLazyClassGen().getType())));
			}

			// Wrap delegate field initialisation in 'synchronized(this)' block - MONITOREXIT (end of 'try')
			InstructionHandle ifNonNullElse = body.append(InstructionConstants.ALOAD_0);
			innerIfNonNull.setTarget(ifNonNullElse);
			body.append(InstructionConstants.MONITOREXIT);

			// There was no error in the 'synchronized(this)' block -> jump to first instruction after exception handler
			InstructionBranch gotoAfterTryCatch = new InstructionBranch(Constants.GOTO, null);
			InstructionHandle tryEnd = body.append(gotoAfterTryCatch);

			// Exception handler (logical 'catch') for the 'synchronized(this)' block ensures that MONITOREXIT is also called
			// in case of an error
			InstructionHandle catchStart = body.append(InstructionConstants.ALOAD_0);
			body.append(InstructionConstants.MONITOREXIT);
			InstructionHandle catchEnd = body.append(InstructionConstants.ATHROW);

			// Add exception handler for 'synchronized(this)' block
			mg.addExceptionHandler(tryStart, tryEnd.getPrev(), catchStart, null, false);

			// CAVEAT: Add an extra, self-referential exception handler entry. I.e., the handler handles its own exceptions.
			// According to https://docs.oracle.com/javase/specs/jvms/se17/html/jvms-3.html#jvms-3.14, this is required, and
			// Javac also creates code like this, which is why we are mimicking it.
			mg.addExceptionHandler(catchStart, catchEnd.getPrev(), catchStart, null, false);

			// if not null use the instance we've got
			InstructionHandle afterTryCatch = body.append(InstructionConstants.ALOAD_0);
			// Tell 'gotoAfterTryCatch' where to find the first statement after the exception handler
			gotoAfterTryCatch.setTarget(afterTryCatch);
			// The outer delegate field null check should also jump to the same place, if the delegate field is not null
			outerIfNonNull.setTarget(afterTryCatch);
			body.append(Utility.createGet(fact, munger.getDelegate(weaver.getLazyClassGen().getType())));

			// args
			int pos = 0;
			if (!Modifier.isStatic(introduced.getModifiers())) { // skip 'this' (?? can this really
				// happen)
				// body.append(InstructionFactory.createThis());
				pos++;
			}
			Type[] paramTypes = BcelWorld.makeBcelTypes(introduced.getParameterTypes());
			for (Type paramType : paramTypes) {
				body.append(InstructionFactory.createLoad(paramType, pos));
				pos += paramType.getSize();
			}
			body.append(Utility.createInvoke(fact, Constants.INVOKEINTERFACE, introduced));
			body.append(InstructionFactory.createReturn(bcelReturnType));

			mg.getBody().append(body);
			weaver.addLazyMethodGen(mg);
			weaver.getLazyClassGen().warnOnAddedMethod(mg.getMethod(), getSignature().getSourceLocation());
			return true;
		}
		return false;
	}

	private boolean mungeFieldHost(BcelClassWeaver weaver, MethodDelegateTypeMunger.FieldHostTypeMunger munger) {
		LazyClassGen gen = weaver.getLazyClassGen();
		if (gen.getType().isAnnotation() || gen.getType().isEnum()) {
			// don't signal error as it could be a consequence of a wild type
			// pattern
			return false;
		}
		// boolean shouldApply =
		munger.matches(weaver.getLazyClassGen().getType(), aspectType); // why
		// do
		// this?
		ResolvedMember host = AjcMemberMaker.itdAtDeclareParentsField(weaver.getLazyClassGen().getType(), munger.getSignature()
				.getType(), aspectType);
		FieldGen field = makeFieldGen(weaver.getLazyClassGen(), host);
		field.setModifiers(field.getModifiers() | BcelField.AccSynthetic);
		weaver.getLazyClassGen().addField(field, null);
		return true;
	}

	private ResolvedMember getRealMemberForITDFromAspect(ResolvedType aspectType, ResolvedMember lookingFor, boolean isCtorRelated) {
		World world = aspectType.getWorld();
		boolean debug = false;
		if (debug) {
			System.err.println("Searching for a member on type: " + aspectType);
			System.err.println("Member we are looking for: " + lookingFor);
		}

		ResolvedMember[] aspectMethods = aspectType.getDeclaredMethods();
		UnresolvedType[] lookingForParams = lookingFor.getParameterTypes();

		ResolvedMember realMember = null;
		for (int i = 0; realMember == null && i < aspectMethods.length; i++) {
			ResolvedMember member = aspectMethods[i];
			if (member.getName().equals(lookingFor.getName())) {
				UnresolvedType[] memberParams = member.getGenericParameterTypes();
				if (memberParams.length == lookingForParams.length) {
					if (debug)
						System.err.println("Reviewing potential candidates: " + member);
					boolean matchOK = true;

					// Check that all method/ctor params all match, although only the erasure
					for (int j = 0; j < memberParams.length && matchOK; j++) {
						ResolvedType pMember = memberParams[j].resolve(world);
						ResolvedType pLookingFor = lookingForParams[j].resolve(world);

						if (pMember.isTypeVariableReference())
							pMember = ((TypeVariableReference) pMember).getTypeVariable().getFirstBound().resolve(world);
						if (pMember.isParameterizedType() || pMember.isGenericType())
							pMember = pMember.getRawType().resolve(aspectType.getWorld());

						if (pLookingFor.isTypeVariableReference())
							pLookingFor = ((TypeVariableReference) pLookingFor).getTypeVariable().getFirstBound().resolve(world);
						if (pLookingFor.isParameterizedType() || pLookingFor.isGenericType())
							pLookingFor = pLookingFor.getRawType().resolve(world);

						if (debug)
							System.err.println("Comparing parameter " + j + "   member=" + pMember + "   lookingFor=" + pLookingFor);
						if (!pMember.equals(pLookingFor))
							matchOK = false;
					}

					if (matchOK)
						realMember = member;
				}
			}
		}
		if (debug && realMember == null)
			System.err.println("Didn't find a match");
		return realMember;
	}

	private void addNeededSuperCallMethods(BcelClassWeaver weaver, ResolvedType onType, Set<ResolvedMember> neededSuperCalls) {
		LazyClassGen gen = weaver.getLazyClassGen();
		for (ResolvedMember superMethod: neededSuperCalls) {
			if (weaver.addDispatchTarget(superMethod)) {
				// System.err.println("super type: " + superMethod.getDeclaringType() + ", " + gen.getType());
				boolean isSuper = !superMethod.getDeclaringType().equals(gen.getType());
				String dispatchName;
				if (isSuper) {
					dispatchName = NameMangler.superDispatchMethod(onType, superMethod.getName());
				} else {
					dispatchName = NameMangler.protectedDispatchMethod(onType, superMethod.getName());
				}
				superMethod = superMethod.resolve(weaver.getWorld());
				LazyMethodGen dispatcher = makeDispatcher(gen, dispatchName, superMethod, weaver.getWorld(), isSuper);
				weaver.addLazyMethodGen(dispatcher);
			}
		}
	}

	private void signalError(String msgid, BcelClassWeaver weaver, UnresolvedType onType) {
		IMessage msg = MessageUtil.error(WeaverMessages.format(msgid, onType.getName()), getSourceLocation());
		weaver.getWorld().getMessageHandler().handleMessage(msg);
	}

	// private void signalWarning(String msgString, BcelClassWeaver weaver) {
	// IMessage msg = MessageUtil.warn(msgString, getSourceLocation());
	// weaver.getWorld().getMessageHandler().handleMessage(msg);
	// }

	private void signalError(String msgString, BcelClassWeaver weaver) {
		IMessage msg = MessageUtil.error(msgString, getSourceLocation());
		weaver.getWorld().getMessageHandler().handleMessage(msg);
	}

	private boolean mungeNewConstructor(BcelClassWeaver weaver, NewConstructorTypeMunger newConstructorTypeMunger) {

		final LazyClassGen currentClass = weaver.getLazyClassGen();
		final InstructionFactory fact = currentClass.getFactory();

		ResolvedMember newConstructorMember = newConstructorTypeMunger.getSyntheticConstructor();
		ResolvedType onType = newConstructorMember.getDeclaringType().resolve(weaver.getWorld());
		if (onType.isRawType()) {
			onType = onType.getGenericType();
		}

		if (onType.isAnnotation()) {
			signalError(WeaverMessages.ITDC_ON_ANNOTATION_NOT_ALLOWED, weaver, onType);
			return false;
		}

		if (onType.isEnum()) {
			signalError(WeaverMessages.ITDC_ON_ENUM_NOT_ALLOWED, weaver, onType);
			return false;
		}

		if (!onType.equals(currentClass.getType())) {
			return false;
		}

		ResolvedMember explicitConstructor = newConstructorTypeMunger.getExplicitConstructor();
		// int declaredParameterCount =
		// newConstructorTypeMunger.getDeclaredParameterCount();
		LazyMethodGen mg = makeMethodGen(currentClass, newConstructorMember);
		mg.setEffectiveSignature(newConstructorTypeMunger.getSignature(), Shadow.ConstructorExecution, true);

		// pr98901
		// For copying the annotations across, we have to discover the real
		// member in the aspect
		// which is holding them.
		if (weaver.getWorld().isInJava5Mode()) {

			ResolvedMember interMethodDispatcher = AjcMemberMaker.postIntroducedConstructor(aspectType, onType,
					newConstructorTypeMunger.getSignature().getParameterTypes());
			AnnotationAJ annotationsOnRealMember[] = null;
			ResolvedMember realMember = getRealMemberForITDFromAspect(aspectType, interMethodDispatcher, true);
			// 266602 - consider it missing to mean that the corresponding aspect had errors
			if (realMember == null) {
				// signalWarning("Unable to apply any annotations attached to " + munger.getSignature(), weaver);
				// throw new BCException("Couldn't find ITD init member '" + interMethodBody + "' on aspect " + aspectType);
			} else {
				annotationsOnRealMember = realMember.getAnnotations();
			}
			if (annotationsOnRealMember != null) {
				for (AnnotationAJ annotationX : annotationsOnRealMember) {
					AnnotationGen a = ((BcelAnnotation) annotationX).getBcelAnnotation();
					AnnotationGen ag = new AnnotationGen(a, weaver.getLazyClassGen().getConstantPool(), true);
					mg.addAnnotation(new BcelAnnotation(ag, weaver.getWorld()));
				}
			}
			// the below loop fixes the very special (and very stupid)
			// case where an aspect declares an annotation
			// on an ITD it declared on itself.
			List<DeclareAnnotation> allDecams = weaver.getWorld().getDeclareAnnotationOnMethods();
			for (DeclareAnnotation decaMC : allDecams) {
				if (decaMC.matches(explicitConstructor, weaver.getWorld()) && mg.getEnclosingClass().getType() == aspectType) {
					mg.addAnnotation(decaMC.getAnnotation());
				}
			}
		}

		// Might have to remove the default constructor - b275032
		// TODO could have tagged the type munger when the fact we needed to do this was detected earlier
		if (mg.getArgumentTypes().length == 0) {
			LazyMethodGen toRemove = null;
			for (LazyMethodGen object : currentClass.getMethodGens()) {
				if (object.getName().equals("<init>") && object.getArgumentTypes().length == 0) {
					toRemove = object;
				}
			}
			if (toRemove != null) {
				currentClass.removeMethodGen(toRemove);
			}
		}

		currentClass.addMethodGen(mg);
		// weaver.addLazyMethodGen(freshConstructor);

		InstructionList body = mg.getBody();

		// add to body: push arts for call to pre, from actual args starting at
		// 1 (skipping this), going to
		// declared argcount + 1
		UnresolvedType[] declaredParams = newConstructorTypeMunger.getSignature().getParameterTypes();
		Type[] paramTypes = mg.getArgumentTypes();
		int frameIndex = 1;
		for (int i = 0, len = declaredParams.length; i < len; i++) {
			body.append(InstructionFactory.createLoad(paramTypes[i], frameIndex));
			frameIndex += paramTypes[i].getSize();
		}
		// do call to pre
		Member preMethod = AjcMemberMaker.preIntroducedConstructor(aspectType, onType, declaredParams);
		body.append(Utility.createInvoke(fact, null, preMethod));

		// create a local, and store return pre stuff into it.
		int arraySlot = mg.allocateLocal(1);
		body.append(InstructionFactory.createStore(Type.OBJECT, arraySlot));

		// put this on the stack
		body.append(InstructionConstants.ALOAD_0);

		// unpack pre args onto stack
		UnresolvedType[] superParamTypes = explicitConstructor.getParameterTypes();

		for (int i = 0, len = superParamTypes.length; i < len; i++) {
			body.append(InstructionFactory.createLoad(Type.OBJECT, arraySlot));
			body.append(Utility.createConstant(fact, i));
			body.append(InstructionFactory.createArrayLoad(Type.OBJECT));
			body.append(Utility.createConversion(fact, Type.OBJECT, BcelWorld.makeBcelType(superParamTypes[i])));
		}

		// call super/this

		body.append(Utility.createInvoke(fact, null, explicitConstructor));

		// put this back on the stack

		body.append(InstructionConstants.ALOAD_0);

		// unpack params onto stack
		Member postMethod = AjcMemberMaker.postIntroducedConstructor(aspectType, onType, declaredParams);
		UnresolvedType[] postParamTypes = postMethod.getParameterTypes();

		for (int i = 1, len = postParamTypes.length; i < len; i++) {
			body.append(InstructionFactory.createLoad(Type.OBJECT, arraySlot));
			body.append(Utility.createConstant(fact, superParamTypes.length + i - 1));
			body.append(InstructionFactory.createArrayLoad(Type.OBJECT));
			body.append(Utility.createConversion(fact, Type.OBJECT, BcelWorld.makeBcelType(postParamTypes[i])));
		}

		// call post
		body.append(Utility.createInvoke(fact, null, postMethod));

		// don't forget to return!!
		body.append(InstructionConstants.RETURN);

		addNeededSuperCallMethods(weaver, onType, munger.getSuperMethodsCalled());

		return true;
	}

	private static LazyMethodGen makeDispatcher(LazyClassGen onGen, String dispatchName, ResolvedMember superMethod,
			BcelWorld world, boolean isSuper) {
		Type[] paramTypes = BcelWorld.makeBcelTypes(superMethod.getParameterTypes());
		Type returnType = BcelWorld.makeBcelType(superMethod.getReturnType());

		int modifiers = Modifier.PUBLIC;
		if (onGen.isInterface()) {
			modifiers |= Modifier.ABSTRACT;
		}

		LazyMethodGen mg = new LazyMethodGen(modifiers, returnType, dispatchName, paramTypes, UnresolvedType.getNames(superMethod
				.getExceptions()), onGen);
		InstructionList body = mg.getBody();

		if (onGen.isInterface()) {
			return mg;
		}

		// assert (!superMethod.isStatic())
		InstructionFactory fact = onGen.getFactory();
		int pos = 0;

		body.append(InstructionFactory.createThis());
		pos++;
		for (Type paramType : paramTypes) {
			body.append(InstructionFactory.createLoad(paramType, pos));
			pos += paramType.getSize();
		}
		if (isSuper) {
			body.append(Utility.createSuperInvoke(fact, world, superMethod));
		} else {
			body.append(Utility.createInvoke(fact, world, superMethod));
		}
		body.append(InstructionFactory.createReturn(returnType));

		return mg;
	}

	private boolean mungeNewField(BcelClassWeaver weaver, NewFieldTypeMunger munger) {
		/* ResolvedMember initMethod = */munger.getInitMethod(aspectType);
		LazyClassGen gen = weaver.getLazyClassGen();
		ResolvedMember field = munger.getSignature();

		ResolvedType onType = weaver.getWorld().resolve(field.getDeclaringType(), munger.getSourceLocation());
		if (onType.isRawType()) {
			onType = onType.getGenericType();
		}

		boolean onInterface = onType.isInterface();

		if (onType.isAnnotation()) {
			signalError(WeaverMessages.ITDF_ON_ANNOTATION_NOT_ALLOWED, weaver, onType);
			return false;
		}

		if (onType.isEnum()) {
			signalError(WeaverMessages.ITDF_ON_ENUM_NOT_ALLOWED, weaver, onType);
			return false;
		}

		ResolvedMember interMethodBody = munger.getInitMethod(aspectType);

		AnnotationAJ annotationsOnRealMember[] = null;
		// pr98901
		// For copying the annotations across, we have to discover the real
		// member in the aspect
		// which is holding them.
		if (weaver.getWorld().isInJava5Mode()) {
			// the below line just gets the method with the same name in
			// aspectType.getDeclaredMethods();
			ResolvedType toLookOn = aspectType;
			if (aspectType.isRawType()) {
				toLookOn = aspectType.getGenericType();
			}
			ResolvedMember realMember = getRealMemberForITDFromAspect(toLookOn, interMethodBody, false);
			if (realMember == null) {
				// signalWarning("Unable to apply any annotations attached to " + munger.getSignature(), weaver);
				// throw new BCException("Couldn't find ITD init member '" + interMethodBody + "' on aspect " + aspectType);
			} else {
				annotationsOnRealMember = realMember.getAnnotations();
			}
		}

		if (onType.equals(gen.getType())) {
			if (onInterface) {
				ResolvedMember itdfieldGetter = AjcMemberMaker.interFieldInterfaceGetter(field, onType, aspectType);
				LazyMethodGen mg = makeMethodGen(gen, itdfieldGetter);
				gen.addMethodGen(mg);

				LazyMethodGen mg1 = makeMethodGen(gen, AjcMemberMaker.interFieldInterfaceSetter(field, onType, aspectType));
				gen.addMethodGen(mg1);
			} else {
				weaver.addInitializer(this);
				ResolvedMember newField = AjcMemberMaker.interFieldClassField(field, aspectType,
						munger.version == NewFieldTypeMunger.VersionTwo);
				FieldGen fg = makeFieldGen(gen, newField);

				if (annotationsOnRealMember != null) {
					for (AnnotationAJ annotationX : annotationsOnRealMember) {
						AnnotationGen a = ((BcelAnnotation) annotationX).getBcelAnnotation();
						AnnotationGen ag = new AnnotationGen(a, weaver.getLazyClassGen().getConstantPool(), true);
						fg.addAnnotation(ag);
					}
				}

				if (weaver.getWorld().isInJava5Mode()) {
					String basicSignature = field.getSignature();
					String genericSignature = field.getReturnType().resolve(weaver.getWorld()).getSignatureForAttribute();
					// String genericSignature =
					// ((ResolvedMemberImpl)field).getSignatureForAttribute();
					if (!basicSignature.equals(genericSignature)) {
						// Add a signature attribute to it
						fg.addAttribute(createSignatureAttribute(gen.getConstantPool(), genericSignature));
					}
				}
				gen.addField(fg, getSourceLocation());

			}
			return true;
		} else if (onInterface && gen.getType().isTopmostImplementor(onType)) {
			// we know that we can't be static since we don't allow statics on interfaces
			if (Modifier.isStatic(field.getModifiers())) {
				throw new RuntimeException("unimplemented");
			}

			boolean alreadyExists = false;
			// only need to check for version 2 style mungers
			if (munger.version==NewFieldTypeMunger.VersionTwo) {
				for (BcelField fieldgen: gen.getFieldGens()) {
					if (fieldgen.getName().equals(field.getName())) {
						alreadyExists=true;
						break;
					}
				}
			}

			// FieldGen fg = makeFieldGen(gen, AjcMemberMaker.interFieldInterfaceField(field, onType, aspectType));
			ResolvedMember newField = AjcMemberMaker.interFieldInterfaceField(field, onType, aspectType, munger.version == NewFieldTypeMunger.VersionTwo);
			String fieldName = newField.getName();

			Type fieldType = BcelWorld.makeBcelType(field.getType());
			if (!alreadyExists) {
				weaver.addInitializer(this);
				FieldGen fg = makeFieldGen(gen,newField);
				if (annotationsOnRealMember != null) {
					for (AnnotationAJ annotationX : annotationsOnRealMember) {
						AnnotationGen a = ((BcelAnnotation) annotationX).getBcelAnnotation();
						AnnotationGen ag = new AnnotationGen(a, weaver.getLazyClassGen().getConstantPool(), true);
						fg.addAnnotation(ag);
					}
				}

				if (weaver.getWorld().isInJava5Mode()) {
					String basicSignature = field.getSignature();
					String genericSignature = field.getReturnType().resolve(weaver.getWorld()).getSignatureForAttribute();
					// String genericSignature =
					// ((ResolvedMemberImpl)field).getSignatureForAttribute();
					if (!basicSignature.equals(genericSignature)) {
						// Add a signature attribute to it
						fg.addAttribute(createSignatureAttribute(gen.getConstantPool(), genericSignature));
					}
				}
				gen.addField(fg, getSourceLocation());
			}
			// this uses a shadow munger to add init method to constructors
			// weaver.getShadowMungers().add(makeInitCallShadowMunger(initMethod)
			// );

			ResolvedMember itdfieldGetter = AjcMemberMaker.interFieldInterfaceGetter(field, gen.getType()/* onType */, aspectType);
			LazyMethodGen mg = makeMethodGen(gen, itdfieldGetter);
			InstructionList il = new InstructionList();
			InstructionFactory fact = gen.getFactory();
			if (Modifier.isStatic(field.getModifiers())) {
				il.append(fact.createFieldAccess(gen.getClassName(), fieldName, fieldType, Constants.GETSTATIC));
			} else {
				il.append(InstructionConstants.ALOAD_0);
				il.append(fact.createFieldAccess(gen.getClassName(), fieldName, fieldType, Constants.GETFIELD));
			}
			il.append(InstructionFactory.createReturn(fieldType));
			mg.getBody().insert(il);

			gen.addMethodGen(mg);

			// Check if we need bridge methods for the field getter and setter
			if (munger.getDeclaredSignature() != null) { // is this munger a
				// parameterized
				// form of some
				// original munger?
				ResolvedMember toBridgeTo = munger.getDeclaredSignature().parameterizedWith(null,
						munger.getSignature().getDeclaringType().resolve(getWorld()), false, munger.getTypeVariableAliases());
				boolean needsbridging = false;
				if (!toBridgeTo.getReturnType().getErasureSignature()
						.equals(munger.getSignature().getReturnType().getErasureSignature())) {
					needsbridging = true;
				}
				if (needsbridging) {
					ResolvedMember bridgingGetter = AjcMemberMaker.interFieldInterfaceGetter(toBridgeTo, gen.getType(), aspectType);
					createBridgeMethodForITDF(weaver, gen, itdfieldGetter, bridgingGetter);
				}
			}

			ResolvedMember itdfieldSetter = AjcMemberMaker.interFieldInterfaceSetter(field, gen.getType(), aspectType);
			LazyMethodGen mg1 = makeMethodGen(gen, itdfieldSetter);
			InstructionList il1 = new InstructionList();
			if (Modifier.isStatic(field.getModifiers())) {
				il1.append(InstructionFactory.createLoad(fieldType, 0));
				il1.append(fact.createFieldAccess(gen.getClassName(), fieldName, fieldType, Constants.PUTSTATIC));
			} else {
				il1.append(InstructionConstants.ALOAD_0);
				il1.append(InstructionFactory.createLoad(fieldType, 1));
				il1.append(fact.createFieldAccess(gen.getClassName(), fieldName, fieldType, Constants.PUTFIELD));
			}
			il1.append(InstructionFactory.createReturn(Type.VOID));
			mg1.getBody().insert(il1);

			gen.addMethodGen(mg1);

			if (munger.getDeclaredSignature() != null) {
				ResolvedMember toBridgeTo = munger.getDeclaredSignature().parameterizedWith(null,
						munger.getSignature().getDeclaringType().resolve(getWorld()), false, munger.getTypeVariableAliases());
				boolean needsbridging = false;
				if (!toBridgeTo.getReturnType().getErasureSignature()
						.equals(munger.getSignature().getReturnType().getErasureSignature())) {
					needsbridging = true;
				}
				if (needsbridging) {
					ResolvedMember bridgingSetter = AjcMemberMaker.interFieldInterfaceSetter(toBridgeTo, gen.getType(), aspectType);
					createBridgeMethodForITDF(weaver, gen, itdfieldSetter, bridgingSetter);
				}
			}

			return true;
		} else {
			return false;
		}
	}

	// FIXME asc combine with other createBridge.. method in this class, avoid
	// the duplication...
	private void createBridgeMethodForITDF(BcelClassWeaver weaver, LazyClassGen gen, ResolvedMember itdfieldSetter,
			ResolvedMember bridgingSetter) {
		InstructionFactory fact;
		LazyMethodGen bridgeMethod = makeMethodGen(gen, bridgingSetter);
		bridgeMethod.setAccessFlags(bridgeMethod.getAccessFlags() | 0x00000040); // BRIDGE = 0x00000040
		Type[] paramTypes = BcelWorld.makeBcelTypes(bridgingSetter.getParameterTypes());
		Type[] bridgingToParms = BcelWorld.makeBcelTypes(itdfieldSetter.getParameterTypes());
		Type returnType = BcelWorld.makeBcelType(bridgingSetter.getReturnType());
		InstructionList body = bridgeMethod.getBody();
		fact = gen.getFactory();
		int pos = 0;

		if (!Modifier.isStatic(bridgingSetter.getModifiers())) {
			body.append(InstructionFactory.createThis());
			pos++;
		}
		for (int i = 0, len = paramTypes.length; i < len; i++) {
			Type paramType = paramTypes[i];
			body.append(InstructionFactory.createLoad(paramType, pos));
			if (!bridgingSetter.getParameterTypes()[i].getErasureSignature().equals(
					itdfieldSetter.getParameterTypes()[i].getErasureSignature())) {
				body.append(fact.createCast(paramType, bridgingToParms[i]));
			}
			pos += paramType.getSize();
		}

		body.append(Utility.createInvoke(fact, weaver.getWorld(), itdfieldSetter));
		body.append(InstructionFactory.createReturn(returnType));
		gen.addMethodGen(bridgeMethod);
	}

	@Override
	public ConcreteTypeMunger parameterizedFor(ResolvedType target) {
		return new BcelTypeMunger(munger.parameterizedFor(target), aspectType);
	}

	@Override
	public ConcreteTypeMunger parameterizeWith(Map<String, UnresolvedType> m, World w) {
		return new BcelTypeMunger(munger.parameterizeWith(m, w), aspectType);
	}

	/**
	 * Returns a list of type variable aliases used in this munger. For example, if the ITD is 'int I&lt;A,B&gt;.m(List&lt;A&gt; las,List&lt;B&gt;
	 * lbs) {}' then this returns a list containing the strings "A" and "B".
	 */
	public List<String> getTypeVariableAliases() {
		return munger.getTypeVariableAliases();
	}

	@Override
	public boolean equals(Object other) {
		if (!(other instanceof BcelTypeMunger)) {
			return false;
		}
		BcelTypeMunger o = (BcelTypeMunger) other;
		return ((o.getMunger() == null) ? (getMunger() == null) : o.getMunger().equals(getMunger()))
				&& ((o.getAspectType() == null) ? (getAspectType() == null) : o.getAspectType().equals(getAspectType()));
		// && (AsmManager.getDefault().getHandleProvider().dependsOnLocation() ? ((o.getSourceLocation() == null) ?
		// (getSourceLocation() == null)
		// : o.getSourceLocation().equals(getSourceLocation()))
		// : true); // pr134471 - remove when handles are improved
		// to be independent of location

	}

	private volatile int hashCode = 0;

	@Override
	public int hashCode() {
		if (hashCode == 0) {
			int result = 17;
			result = 37 * result + ((getMunger() == null) ? 0 : getMunger().hashCode());
			result = 37 * result + ((getAspectType() == null) ? 0 : getAspectType().hashCode());
			hashCode = result;
		}
		return hashCode;
	}
}