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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.weaver.bcel;
-
- import java.io.File;
- import java.io.IOException;
- import java.lang.reflect.Modifier;
- import java.util.ArrayList;
- import java.util.List;
- import java.util.StringTokenizer;
-
- import org.aspectj.apache.bcel.classfile.ClassParser;
- import org.aspectj.apache.bcel.classfile.JavaClass;
- import org.aspectj.apache.bcel.classfile.Method;
- import org.aspectj.apache.bcel.generic.ConstantPoolGen;
- import org.aspectj.apache.bcel.generic.FieldInstruction;
- import org.aspectj.apache.bcel.generic.GETSTATIC;
- import org.aspectj.apache.bcel.generic.INVOKEINTERFACE;
- import org.aspectj.apache.bcel.generic.INVOKESPECIAL;
- import org.aspectj.apache.bcel.generic.INVOKESTATIC;
- import org.aspectj.apache.bcel.generic.InvokeInstruction;
- import org.aspectj.apache.bcel.generic.PUTSTATIC;
- import org.aspectj.apache.bcel.generic.Type;
- import org.aspectj.apache.bcel.util.ClassPath;
- import org.aspectj.bridge.IMessageHandler;
- import org.aspectj.weaver.Advice;
- import org.aspectj.weaver.AdviceKind;
- import org.aspectj.weaver.AjAttribute;
- import org.aspectj.weaver.ConcreteTypeMunger;
- import org.aspectj.weaver.ICrossReferenceHandler;
- import org.aspectj.weaver.Member;
- import org.aspectj.weaver.ResolvedMember;
- import org.aspectj.weaver.ResolvedTypeMunger;
- import org.aspectj.weaver.ResolvedTypeX;
- import org.aspectj.weaver.TypeX;
- import org.aspectj.weaver.World;
- import org.aspectj.weaver.patterns.FormalBinding;
- import org.aspectj.weaver.patterns.Pointcut;
- import org.aspectj.weaver.patterns.SimpleScope;
-
- public class BcelWorld extends World {
- private ClassPathManager classPath;
-
- //private ClassPathManager aspectPath = null;
- // private List aspectPathEntries;
-
- // ---- constructors
-
- public BcelWorld() {
- this("");
- }
-
- public BcelWorld(String cp) {
- this(makeDefaultClasspath(cp), IMessageHandler.THROW, null);
- }
-
- private static List makeDefaultClasspath(String cp) {
- List classPath = new ArrayList();
- classPath.addAll(getPathEntries(cp));
- classPath.addAll(getPathEntries(ClassPath.getClassPath()));
- //System.err.println("classpath: " + classPath);
- return classPath;
-
- }
-
- private static List getPathEntries(String s) {
- List ret = new ArrayList();
- StringTokenizer tok = new StringTokenizer(s, File.pathSeparator);
-
- while(tok.hasMoreTokens()) ret.add(tok.nextToken());
-
- return ret;
- }
-
- public BcelWorld(List classPath, IMessageHandler handler, ICrossReferenceHandler xrefHandler) {
- //this.aspectPath = new ClassPathManager(aspectPath, handler);
- this.classPath = new ClassPathManager(classPath, handler);
- setMessageHandler(handler);
- setXRefHandler(xrefHandler);
- }
-
- public BcelWorld(ClassPathManager cpm, IMessageHandler handler, ICrossReferenceHandler xrefHandler) {
- this.classPath = cpm;
- setMessageHandler(handler);
- setXRefHandler(xrefHandler);
- }
-
- public void addPath (String name) {
- classPath.addPath(name, this.getMessageHandler());
- }
-
- /**
- * Parse a string into advice.
- *
- * <blockquote><pre>
- * Kind ( Id , ... ) : Pointcut -> MethodSignature
- * </pre></blockquote>
- */
- public Advice shadowMunger(String str, int extraFlag) {
- str = str.trim();
- int start = 0;
- int i = str.indexOf('(');
- AdviceKind kind =
- AdviceKind.stringToKind(str.substring(start, i));
- start = ++i;
- i = str.indexOf(')', i);
- String[] ids = parseIds(str.substring(start, i).trim());
- //start = ++i;
-
-
-
- i = str.indexOf(':', i);
- start = ++i;
- i = str.indexOf("->", i);
- Pointcut pointcut = Pointcut.fromString(str.substring(start, i).trim());
- Member m = Member.methodFromString(str.substring(i+2, str.length()).trim());
-
- // now, we resolve
- TypeX[] types = m.getParameterTypes();
- FormalBinding[] bindings = new FormalBinding[ids.length];
- for (int j = 0, len = ids.length; j < len; j++) {
- bindings[j] = new FormalBinding(types[j], ids[j], j, 0, 0, "fromString");
- }
-
- Pointcut p =
- pointcut.resolve(new SimpleScope(this, bindings));
-
- return new BcelAdvice(kind, p, m, extraFlag, 0, 0, null, null);
- }
-
- private String[] parseIds(String str) {
- if (str.length() == 0) return ZERO_STRINGS;
- List l = new ArrayList();
- int start = 0;
- while (true) {
- int i = str.indexOf(',', start);
- if (i == -1) {
- l.add(str.substring(start).trim());
- break;
- }
- l.add(str.substring(start, i).trim());
- start = i+1;
- }
- return (String[]) l.toArray(new String[l.size()]);
- }
-
- // ---- various interactions with bcel
-
- public static Type makeBcelType(TypeX type) {
- return Type.getType(type.getSignature());
- }
-
- static Type[] makeBcelTypes(TypeX[] types) {
- Type[] ret = new Type[types.length];
- for (int i = 0, len = types.length; i < len; i++) {
- ret[i] = makeBcelType(types[i]);
- }
- return ret;
- }
-
- public static TypeX fromBcel(Type t) {
- return TypeX.forSignature(t.getSignature());
- }
-
- static TypeX[] fromBcel(Type[] ts) {
- TypeX[] ret = new TypeX[ts.length];
- for (int i = 0, len = ts.length; i < len; i++) {
- ret[i] = fromBcel(ts[i]);
- }
- return ret;
- }
-
- public ResolvedTypeX resolve(Type t) {
- return resolve(fromBcel(t));
- }
-
-
- protected ResolvedTypeX.ConcreteName resolveObjectType(ResolvedTypeX.Name ty) {
- String name = ty.getName();
- JavaClass jc = null;
- //UnwovenClassFile classFile = (UnwovenClassFile)sourceJavaClasses.get(name);
- //if (classFile != null) jc = classFile.getJavaClass();
- // if (jc == null) {
- // jc = lookupJavaClass(aspectPath, name);
- // }
- if (jc == null) {
- jc = lookupJavaClass(classPath, name);
- }
- if (jc == null) {
- return null;
- } else {
- return makeBcelObjectType(ty, jc, false);
- }
- }
-
- private BcelObjectType makeBcelObjectType(ResolvedTypeX.Name resolvedTypeX, JavaClass jc, boolean exposedToWeaver) {
- BcelObjectType ret = new BcelObjectType(resolvedTypeX, jc, exposedToWeaver);
- resolvedTypeX.setDelegate(ret);
- return ret;
- }
-
-
- private JavaClass lookupJavaClass(ClassPathManager classPath, String name) {
- if (classPath == null) return null;
- try {
- ClassPathManager.ClassFile file = classPath.find(TypeX.forName(name));
- if (file == null) return null;
-
- ClassParser parser = new ClassParser(file.getInputStream(), file.getPath());
-
- JavaClass jc = parser.parse();
-
- return jc;
- } catch (IOException ioe) {
- return null;
- }
- }
-
-
- public BcelObjectType addSourceObjectType(JavaClass jc) {
- String signature = TypeX.forName(jc.getClassName()).getSignature();
- ResolvedTypeX.Name nameTypeX = (ResolvedTypeX.Name)typeMap.get(signature);
-
- if (nameTypeX == null) {
- nameTypeX = new ResolvedTypeX.Name(signature, this);
- }
- BcelObjectType ret = makeBcelObjectType(nameTypeX, jc, true);
- nameTypeX.setDelegate(ret);
- typeMap.put(signature, nameTypeX);
- return ret;
- }
-
- void deleteSourceObjectType(TypeX ty) {
- typeMap.remove(ty.getSignature());
- }
-
- public static Member makeFieldSignature(LazyClassGen cg, FieldInstruction fi) {
- ConstantPoolGen cpg = cg.getConstantPoolGen();
- return
- Member.field(
- fi.getClassName(cpg),
- (fi instanceof GETSTATIC || fi instanceof PUTSTATIC)
- ? Modifier.STATIC
- : 0,
- fi.getName(cpg),
- fi.getSignature(cpg));
- }
-
- public static Member makeFieldSetSignature(LazyClassGen cg, FieldInstruction fi) {
- ConstantPoolGen cpg = cg.getConstantPoolGen();
- return
- Member.field(
- fi.getClassName(cpg),
- (fi instanceof GETSTATIC || fi instanceof PUTSTATIC)
- ? Modifier.STATIC
- : 0,
- fi.getName(cpg),
- "(" + fi.getSignature(cpg) + ")" +fi.getSignature(cpg));
- }
-
- public Member makeMethodSignature(LazyMethodGen mg) {
- return makeMethodSignature(mg, null);
- }
-
-
- public Member makeMethodSignature(LazyMethodGen mg, Member.Kind kind) {
- ResolvedMember ret = mg.getMemberView();
- if (ret == null) {
- int mods = mg.getAccessFlags();
- if (mg.getEnclosingClass().isInterface()) {
- mods |= Modifier.INTERFACE;
- }
- if (kind == null) {
- if (mg.getName().equals("<init>")) {
- kind = Member.CONSTRUCTOR;
- } else if (mg.getName().equals("<clinit>")) {
- kind = Member.STATIC_INITIALIZATION;
- } else {
- kind = Member.METHOD;
- }
- }
- return new ResolvedMember(kind,
- TypeX.forName(mg.getClassName()),
- mods,
- fromBcel(mg.getReturnType()),
- mg.getName(),
- fromBcel(mg.getArgumentTypes())
- );
- } else {
- return ret;
- }
-
- }
-
- public static Member makeMethodSignature(LazyClassGen cg, InvokeInstruction ii) {
- ConstantPoolGen cpg = cg.getConstantPoolGen();
- String declaring = ii.getClassName(cpg);
- String name = ii.getName(cpg);
- String signature = ii.getSignature(cpg);
-
- int modifier =
- (ii instanceof INVOKEINTERFACE)
- ? Modifier.INTERFACE
- : (ii instanceof INVOKESTATIC)
- ? Modifier.STATIC
- : (ii instanceof INVOKESPECIAL && ! name.equals("<init>"))
- ? Modifier.PRIVATE
- : 0;
- return Member.method(TypeX.forName(declaring), modifier, name, signature);
- }
-
- public static Member makeMungerMethodSignature(JavaClass javaClass, Method method) {
- int mods = 0;
- if (method.isStatic()) mods = Modifier.STATIC;
- else if (javaClass.isInterface()) mods = Modifier.INTERFACE;
- else if (method.isPrivate()) mods = Modifier.PRIVATE;
- return Member.method(
- TypeX.forName(javaClass.getClassName()), mods, method.getName(), method.getSignature());
- }
-
- private static final String[] ZERO_STRINGS = new String[0];
-
- public String toString() {
- StringBuffer buf = new StringBuffer();
- buf.append("BcelWorld(");
- //buf.append(shadowMungerMap);
- buf.append(")");
- return buf.toString();
- }
-
- public Advice concreteAdvice(
- AjAttribute.AdviceAttribute attribute,
- Pointcut pointcut,
- Member signature)
- {
- //System.err.println("concrete advice: " + signature + " context " + sourceContext);
- return new BcelAdvice(attribute, pointcut, signature, null);
- }
-
- public ConcreteTypeMunger concreteTypeMunger(
- ResolvedTypeMunger munger, ResolvedTypeX aspectType)
- {
- return new BcelTypeMunger(munger, aspectType);
- }
-
- public ConcreteTypeMunger makeCflowStackFieldAdder(ResolvedMember cflowField) {
- return new BcelCflowStackFieldAdder(cflowField);
- }
-
- public static BcelObjectType getBcelObjectType(ResolvedTypeX concreteAspect) {
- //XXX need error checking
- return (BcelObjectType) ((ResolvedTypeX.Name)concreteAspect).getDelegate();
- }
-
- }
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