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- /* *******************************************************************
- * 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 Common Public License v1.0
- * which accompanies this distribution and is available at
- * http://www.eclipse.org/legal/cpl-v10.html
- *
- * Contributors:
- * PARC initial implementation
- * ******************************************************************/
-
-
- package org.aspectj.ajdt.internal.compiler.ast;
-
- import java.lang.reflect.Modifier;
- import java.util.ArrayList;
- import java.util.List;
-
- import org.aspectj.ajdt.internal.compiler.lookup.AjTypeConstants;
- import org.aspectj.ajdt.internal.compiler.lookup.EclipseFactory;
- import org.aspectj.ajdt.internal.compiler.lookup.PrivilegedHandler;
- import org.aspectj.weaver.Advice;
- import org.aspectj.weaver.AdviceKind;
- import org.aspectj.weaver.AjAttribute;
- import org.aspectj.weaver.NameMangler;
- import org.aspectj.weaver.ResolvedMember;
- import org.aspectj.weaver.TypeX;
- import org.eclipse.jdt.internal.compiler.ClassFile;
- import org.eclipse.jdt.internal.compiler.CompilationResult;
- import org.eclipse.jdt.internal.compiler.ast.Argument;
- import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
- import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
- import org.eclipse.jdt.internal.compiler.ast.TypeReference;
- import org.eclipse.jdt.internal.compiler.codegen.CodeStream;
- import org.eclipse.jdt.internal.compiler.lookup.ArrayBinding;
- import org.eclipse.jdt.internal.compiler.lookup.ClassScope;
- import org.eclipse.jdt.internal.compiler.lookup.MethodBinding;
- import org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;
- import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
- import org.eclipse.jdt.core.compiler.CharOperation;
-
- /**
- * Represents before, after and around advice in an aspect.
- * Will generate a method corresponding to the body of the advice with an
- * attribute including additional information.
- *
- * @author Jim Hugunin
- */
- public class AdviceDeclaration extends MethodDeclaration {
- public PointcutDesignator pointcutDesignator;
- int baseArgumentCount;
-
- public Argument extraArgument;
-
- public AdviceKind kind;
- private int extraArgumentFlags = 0;
-
- public MethodBinding proceedMethodBinding;
-
-
- public List proceedCalls = new ArrayList(2);
- public boolean proceedInInners;
- public ResolvedMember[] proceedCallSignatures;
- public boolean[] formalsUnchangedToProceed;
- public TypeX[] declaredExceptions;
-
-
- public AdviceDeclaration(CompilationResult result, AdviceKind kind) {
- super(result);
- this.returnType = TypeReference.baseTypeReference(T_void, 0);
- this.kind = kind;
- }
-
-
- protected int generateInfoAttributes(ClassFile classFile) {
- List l = new ArrayList(1);
- l.add(new EclipseAttributeAdapter(makeAttribute()));
-
- return classFile.generateMethodInfoAttribute(binding, l);
- }
-
- public AjAttribute makeAttribute() {
- if (kind == AdviceKind.Around) {
- return new AjAttribute.AdviceAttribute(kind, pointcutDesignator.getPointcut(),
- extraArgumentFlags, sourceStart, sourceEnd, null,
- proceedInInners, proceedCallSignatures, formalsUnchangedToProceed,
- declaredExceptions);
- } else {
- return new AjAttribute.AdviceAttribute(kind, pointcutDesignator.getPointcut(),
- extraArgumentFlags, sourceStart, sourceEnd, null);
- }
- }
-
- public void resolveStatements() {
- if (binding == null || ignoreFurtherInvestigation) return;
-
- ClassScope upperScope = (ClassScope)scope.parent; //!!! safety
-
- modifiers = binding.modifiers = checkAndSetModifiers(modifiers, upperScope);
-
- if (kind == AdviceKind.AfterThrowing && extraArgument != null) {
- TypeBinding argTb = extraArgument.binding.type;
- TypeBinding expectedTb = upperScope.getJavaLangThrowable();
- if (!argTb.isCompatibleWith(expectedTb)) {
- scope.problemReporter().typeMismatchError(argTb, expectedTb, extraArgument);
- ignoreFurtherInvestigation = true;
- return;
- }
- }
-
-
- pointcutDesignator.finishResolveTypes(this, this.binding,
- baseArgumentCount, upperScope.referenceContext.binding);
-
- if (binding == null || ignoreFurtherInvestigation) return;
-
- if (kind == AdviceKind.Around) {
- ReferenceBinding[] exceptions =
- new ReferenceBinding[] { upperScope.getJavaLangThrowable() };
- proceedMethodBinding = new MethodBinding(Modifier.STATIC,
- "proceed".toCharArray(), binding.returnType,
- resize(baseArgumentCount+1, binding.parameters),
- exceptions, binding.declaringClass);
- proceedMethodBinding.selector =
- CharOperation.concat(selector, proceedMethodBinding.selector);
- }
-
- super.resolveStatements(); //upperScope);
- if (binding != null) determineExtraArgumentFlags();
-
- if (kind == AdviceKind.Around) {
- int n = proceedCalls.size();
- EclipseFactory world = EclipseFactory.fromScopeLookupEnvironment(upperScope);
-
- //System.err.println("access to: " + Arrays.asList(handler.getMembers()));
-
- //XXX set these correctly
- formalsUnchangedToProceed = new boolean[baseArgumentCount];
- proceedCallSignatures = new ResolvedMember[0];
- proceedInInners = false;
- declaredExceptions = new TypeX[0];
-
- for (int i=0; i < n; i++) {
- Proceed call = (Proceed)proceedCalls.get(i);
- if (call.inInner) {
- //System.err.println("proceed in inner: " + call);
- proceedInInners = true;
- //XXX wrong
- //proceedCallSignatures[i] = world.makeResolvedMember(call.binding);
- }
- }
-
- // ??? should reorganize into AspectDeclaration
- // if we have proceed in inners we won't ever be inlined so the code below is unneeded
- if (!proceedInInners) {
- PrivilegedHandler handler = (PrivilegedHandler)upperScope.referenceContext.binding.privilegedHandler;
- if (handler == null) {
- handler = new PrivilegedHandler((AspectDeclaration)upperScope.referenceContext);
- //upperScope.referenceContext.binding.privilegedHandler = handler;
- }
-
- this.traverse(new MakeDeclsPublicVisitor(), (ClassScope)null);
-
- AccessForInlineVisitor v = new AccessForInlineVisitor((AspectDeclaration)upperScope.referenceContext, handler);
- this.traverse(v, (ClassScope) null);
-
- // ??? if we found a construct that we can't inline, set
- // proceedInInners so that we won't try to inline this body
- if (!v.isInlinable) proceedInInners = true;
- }
- }
- }
-
-
- public int getDeclaredParameterCount() {
- // this only works before code generation
- return this.arguments.length - 3 - ((extraArgument == null) ? 0 : 1);
- //Advice.countOnes(extraArgumentFlags);
- }
-
- public void generateProceedMethod(ClassScope classScope, ClassFile classFile) {
- MethodBinding binding = (MethodBinding)proceedMethodBinding;
-
- classFile.generateMethodInfoHeader(binding);
- int methodAttributeOffset = classFile.contentsOffset;
- int attributeNumber = classFile.generateMethodInfoAttribute(binding, AstUtil.getAjSyntheticAttribute());
- int codeAttributeOffset = classFile.contentsOffset;
- classFile.generateCodeAttributeHeader();
- CodeStream codeStream = classFile.codeStream;
- codeStream.reset(this, classFile);
-
- // push the closure
- int nargs = binding.parameters.length;
- int closureIndex = 0;
- for (int i=0; i < nargs-1; i++) {
- closureIndex += AstUtil.slotsNeeded(binding.parameters[i]);
- }
-
-
- codeStream.loadObject(closureIndex);
-
- // build the Object[]
-
- codeStream.generateInlinedValue(nargs-1);
- codeStream.newArray(classScope, new ArrayBinding(classScope.getType(TypeBinding.JAVA_LANG_OBJECT), 1));
-
- int index = 0;
- for (int i=0; i < nargs-1; i++) {
- TypeBinding type = binding.parameters[i];
- codeStream.dup();
- codeStream.generateInlinedValue(i);
- codeStream.load(type, index);
- index += AstUtil.slotsNeeded(type);
- if (type.isBaseType()) {
- codeStream.invokestatic(AjTypeConstants.getConversionMethodToObject(classScope, type));
- }
-
- codeStream.aastore();
- }
-
- // call run
- ReferenceBinding closureType = (ReferenceBinding)binding.parameters[nargs-1];
- MethodBinding runMethod = closureType.getMethods("run".toCharArray())[0];
- codeStream.invokevirtual(runMethod);
-
- TypeBinding returnType = binding.returnType;
- if (returnType.isBaseType()) {
- codeStream.invokestatic(AjTypeConstants.getConversionMethodFromObject(classScope, returnType));
- } else {
- codeStream.checkcast(returnType);
- }
- AstUtil.generateReturn(returnType, codeStream);
-
- classFile.completeCodeAttribute(codeAttributeOffset);
- attributeNumber++;
- classFile.completeMethodInfo(methodAttributeOffset, attributeNumber);
- }
-
-
-
- public void generateCode(ClassScope classScope, ClassFile classFile) {
- if (ignoreFurtherInvestigation) return;
-
- super.generateCode(classScope, classFile);
- if (proceedMethodBinding != null) {
- generateProceedMethod(classScope, classFile);
- }
- }
-
-
- private void determineExtraArgumentFlags() {
- if (extraArgument != null) extraArgumentFlags |= Advice.ExtraArgument;
-
- ThisJoinPointVisitor tjp = new ThisJoinPointVisitor(this);
- extraArgumentFlags |= tjp.removeUnusedExtraArguments();
- }
-
- private static TypeBinding[] resize(int newSize, TypeBinding[] bindings) {
- int len = bindings.length;
- TypeBinding[] ret = new TypeBinding[newSize];
- System.arraycopy(bindings, 0, ret, 0, Math.min(newSize, len));
- return ret;
- }
-
-
-
- public void postParse(TypeDeclaration typeDec) {
- this.selector =
- NameMangler.adviceName(EclipseFactory.fromBinding(typeDec.binding), kind, sourceStart).toCharArray();
- if (arguments != null) {
- baseArgumentCount = arguments.length;
- }
-
- if (kind == AdviceKind.Around) {
- extraArgument = makeFinalArgument("ajc_aroundClosure",
- AjTypeConstants.getAroundClosureType());
- }
-
- int addedArguments = 3;
- if (extraArgument != null) {
- addedArguments += 1;
- }
-
- arguments = extendArgumentsLength(arguments, addedArguments);
-
- int index = baseArgumentCount;
- if (extraArgument != null) {
- arguments[index++] = extraArgument;
- }
-
- arguments[index++] = makeFinalArgument("thisJoinPointStaticPart", AjTypeConstants.getJoinPointStaticPartType());
- arguments[index++] = makeFinalArgument("thisJoinPoint", AjTypeConstants.getJoinPointType());
- arguments[index++] = makeFinalArgument("thisEnclosingJoinPointStaticPart", AjTypeConstants.getJoinPointStaticPartType());
-
- if (pointcutDesignator.isError()) {
- this.ignoreFurtherInvestigation = true;
- }
- pointcutDesignator.postParse(typeDec, this);
- }
-
- private int checkAndSetModifiers(int modifiers, ClassScope scope) {
- if (modifiers == 0) return Modifier.PUBLIC;
- else if (modifiers == Modifier.STRICT) return Modifier.PUBLIC | Modifier.STRICT;
- else {
- tagAsHavingErrors();
- scope.problemReporter().signalError(declarationSourceStart, sourceStart-1, "illegal modifier on advice, only strictfp is allowed");
- return Modifier.PUBLIC;
- }
- }
-
-
- public static Argument[] addTjpArguments(Argument[] arguments) {
- int index = arguments.length;
- arguments = extendArgumentsLength(arguments, 3);
-
- arguments[index++] = makeFinalArgument("thisJoinPointStaticPart", AjTypeConstants.getJoinPointStaticPartType());
- arguments[index++] = makeFinalArgument("thisJoinPoint", AjTypeConstants.getJoinPointType());
- arguments[index++] = makeFinalArgument("thisEnclosingJoinPointStaticPart", AjTypeConstants.getJoinPointStaticPartType());
-
- return arguments;
- }
-
-
-
- private static Argument makeFinalArgument(String name, TypeReference typeRef) {
- long pos = 0; //XXX encode start and end location
- return new Argument(name.toCharArray(), pos, typeRef, Modifier.FINAL);
- }
-
-
- private static Argument[] extendArgumentsLength(Argument[] args, int addedArguments) {
- if (args == null) {
- return new Argument[addedArguments];
- }
- int len = args.length;
- Argument[] ret = new Argument[len + addedArguments];
- System.arraycopy(args, 0, ret, 0, len);
- return ret;
- }
-
-
- // public String toString(int tab) {
- // String s = tabString(tab);
- // if (modifiers != AccDefault) {
- // s += modifiersString(modifiers);
- // }
- //
- // if (kind == AdviceKind.Around) {
- // s += returnTypeToString(0);
- // }
- //
- // s += new String(selector) + "("; //$NON-NLS-1$
- // if (arguments != null) {
- // for (int i = 0; i < arguments.length; i++) {
- // s += arguments[i].toString(0);
- // if (i != (arguments.length - 1))
- // s = s + ", "; //$NON-NLS-1$
- // };
- // };
- // s += ")"; //$NON-NLS-1$
- //
- // if (extraArgument != null) {
- // s += "(" + extraArgument.toString(0) + ")";
- // }
- //
- //
- //
- // if (thrownExceptions != null) {
- // s += " throws "; //$NON-NLS-1$
- // for (int i = 0; i < thrownExceptions.length; i++) {
- // s += thrownExceptions[i].toString(0);
- // if (i != (thrownExceptions.length - 1))
- // s = s + ", "; //$NON-NLS-1$
- // };
- // };
- //
- // s += ": ";
- // if (pointcutDesignator != null) {
- // s += pointcutDesignator.toString(0);
- // }
- //
- // s += toStringStatements(tab + 1);
- // return s;
- // }
-
- public StringBuffer printBody(int indent, StringBuffer output) {
- output.append(": ");
- if (pointcutDesignator != null) {
- output.append(pointcutDesignator.toString());
- }
- return super.printBody(indent,output);
- }
-
- public StringBuffer printReturnType(int indent, StringBuffer output) {
- if (this.kind == AdviceKind.Around) {
- return super.printReturnType(indent,output);
- }
- return output;
- }
- }
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