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The AspectJ weaver introduces advices to java classes
/* *******************************************************************
* 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 v1.0
* which accompanies this distribution and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* PARC initial implementation
* Alexandre Vasseur perClause support for @AJ aspects
* ******************************************************************/
package org.aspectj.weaver.bcel;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Modifier;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.ClassParser;
import org.aspectj.apache.bcel.classfile.ConstantPool;
import org.aspectj.apache.bcel.classfile.JavaClass;
import org.aspectj.apache.bcel.generic.FieldInstruction;
import org.aspectj.apache.bcel.generic.INVOKEINTERFACE;
import org.aspectj.apache.bcel.generic.Instruction;
import org.aspectj.apache.bcel.generic.InstructionHandle;
import org.aspectj.apache.bcel.generic.InvokeInstruction;
import org.aspectj.apache.bcel.generic.MULTIANEWARRAY;
import org.aspectj.apache.bcel.generic.ObjectType;
import org.aspectj.apache.bcel.generic.Type;
import org.aspectj.apache.bcel.util.ClassLoaderReference;
import org.aspectj.apache.bcel.util.ClassLoaderRepository;
import org.aspectj.apache.bcel.util.ClassPath;
import org.aspectj.apache.bcel.util.NonCachingClassLoaderRepository;
import org.aspectj.apache.bcel.util.Repository;
import org.aspectj.asm.AsmManager;
import org.aspectj.asm.IRelationship;
import org.aspectj.asm.internal.CharOperation;
import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.IMessageHandler;
import org.aspectj.bridge.ISourceLocation;
import org.aspectj.bridge.Message;
import org.aspectj.bridge.MessageUtil;
import org.aspectj.bridge.WeaveMessage;
import org.aspectj.weaver.Advice;
import org.aspectj.weaver.AdviceKind;
import org.aspectj.weaver.AnnotationAJ;
import org.aspectj.weaver.AnnotationOnTypeMunger;
import org.aspectj.weaver.BCException;
import org.aspectj.weaver.Checker;
import org.aspectj.weaver.ICrossReferenceHandler;
import org.aspectj.weaver.IWeavingSupport;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.MemberImpl;
import org.aspectj.weaver.MemberKind;
import org.aspectj.weaver.NewParentTypeMunger;
import org.aspectj.weaver.ReferenceType;
import org.aspectj.weaver.ReferenceTypeDelegate;
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.ShadowMunger;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.World;
import org.aspectj.weaver.loadtime.definition.Definition;
import org.aspectj.weaver.loadtime.definition.DocumentParser;
import org.aspectj.weaver.model.AsmRelationshipProvider;
import org.aspectj.weaver.patterns.DeclareAnnotation;
import org.aspectj.weaver.patterns.DeclareParents;
import org.aspectj.weaver.patterns.ParserException;
import org.aspectj.weaver.patterns.PatternParser;
import org.aspectj.weaver.patterns.TypePattern;
import org.aspectj.weaver.tools.Trace;
import org.aspectj.weaver.tools.TraceFactory;
public class BcelWorld extends World implements Repository {
private final ClassPathManager classPath;
protected Repository delegate;
private BcelWeakClassLoaderReference loaderRef;
private final BcelWeavingSupport bcelWeavingSupport = new BcelWeavingSupport();
private boolean isXmlConfiguredWorld = false;
private WeavingXmlConfig xmlConfiguration;
private List typeDelegateResolvers;
private static Trace trace = TraceFactory.getTraceFactory().getTrace(BcelWorld.class);
public BcelWorld() {
this("");
}
public BcelWorld(String cp) {
this(makeDefaultClasspath(cp), IMessageHandler.THROW, null);
}
public IRelationship.Kind determineRelKind(ShadowMunger munger) {
AdviceKind ak = ((Advice) munger).getKind();
if (ak.getKey() == AdviceKind.Before.getKey()) {
return IRelationship.Kind.ADVICE_BEFORE;
} else if (ak.getKey() == AdviceKind.After.getKey()) {
return IRelationship.Kind.ADVICE_AFTER;
} else if (ak.getKey() == AdviceKind.AfterThrowing.getKey()) {
return IRelationship.Kind.ADVICE_AFTERTHROWING;
} else if (ak.getKey() == AdviceKind.AfterReturning.getKey()) {
return IRelationship.Kind.ADVICE_AFTERRETURNING;
} else if (ak.getKey() == AdviceKind.Around.getKey()) {
return IRelationship.Kind.ADVICE_AROUND;
} else if (ak.getKey() == AdviceKind.CflowEntry.getKey() || ak.getKey() == AdviceKind.CflowBelowEntry.getKey()
|| ak.getKey() == AdviceKind.InterInitializer.getKey() || ak.getKey() == AdviceKind.PerCflowEntry.getKey()
|| ak.getKey() == AdviceKind.PerCflowBelowEntry.getKey() || ak.getKey() == AdviceKind.PerThisEntry.getKey()
|| ak.getKey() == AdviceKind.PerTargetEntry.getKey() || ak.getKey() == AdviceKind.Softener.getKey()
|| ak.getKey() == AdviceKind.PerTypeWithinEntry.getKey()) {
// System.err.println("Dont want a message about this: "+ak);
return null;
}
throw new RuntimeException("Shadow.determineRelKind: What the hell is it? " + ak);
}
@Override
public void reportMatch(ShadowMunger munger, Shadow shadow) {
if (getCrossReferenceHandler() != null) {
getCrossReferenceHandler().addCrossReference(munger.getSourceLocation(), // What is being applied
shadow.getSourceLocation(), // Where is it being applied
determineRelKind(munger).getName(), // What kind of advice?
((Advice) munger).hasDynamicTests() // Is a runtime test being stuffed in the code?
);
}
if (!getMessageHandler().isIgnoring(IMessage.WEAVEINFO)) {
reportWeavingMessage(munger, shadow);
}
if (getModel() != null) {
AsmRelationshipProvider.addAdvisedRelationship(getModelAsAsmManager(), shadow, munger);
}
}
/*
* Report a message about the advice weave that has occurred. Some messing about to make it pretty ! This code is just asking
* for an NPE to occur ...
*/
private void reportWeavingMessage(ShadowMunger munger, Shadow shadow) {
Advice advice = (Advice) munger;
AdviceKind aKind = advice.getKind();
// Only report on interesting advice kinds ...
if (aKind == null || advice.getConcreteAspect() == null) {
// We suspect someone is programmatically driving the weaver
// (e.g. IdWeaveTestCase in the weaver testcases)
return;
}
if (!(aKind.equals(AdviceKind.Before) || aKind.equals(AdviceKind.After) || aKind.equals(AdviceKind.AfterReturning)
|| aKind.equals(AdviceKind.AfterThrowing) || aKind.equals(AdviceKind.Around) || aKind.equals(AdviceKind.Softener))) {
return;
}
// synchronized blocks are implemented with multiple monitor_exit instructions in the bytecode
// (one for normal exit from the method, one for abnormal exit), we only want to tell the user
// once we have advised the end of the sync block, even though under the covers we will have
// woven both exit points
if (shadow.getKind() == Shadow.SynchronizationUnlock) {
if (advice.lastReportedMonitorExitJoinpointLocation == null) {
// this is the first time through, let's continue...
advice.lastReportedMonitorExitJoinpointLocation = shadow.getSourceLocation();
} else {
if (areTheSame(shadow.getSourceLocation(), advice.lastReportedMonitorExitJoinpointLocation)) {
// Don't report it again!
advice.lastReportedMonitorExitJoinpointLocation = null;
return;
}
// hmmm, this means some kind of nesting is going on, urgh
advice.lastReportedMonitorExitJoinpointLocation = shadow.getSourceLocation();
}
}
String description = advice.getKind().toString();
String advisedType = shadow.getEnclosingType().getName();
String advisingType = advice.getConcreteAspect().getName();
Message msg = null;
if (advice.getKind().equals(AdviceKind.Softener)) {
msg = WeaveMessage.constructWeavingMessage(WeaveMessage.WEAVEMESSAGE_SOFTENS, new String[] { advisedType,
beautifyLocation(shadow.getSourceLocation()), advisingType, beautifyLocation(munger.getSourceLocation()) },
advisedType, advisingType);
} else {
boolean runtimeTest = advice.hasDynamicTests();
String joinPointDescription = shadow.toString();
msg = WeaveMessage
.constructWeavingMessage(WeaveMessage.WEAVEMESSAGE_ADVISES,
new String[] { joinPointDescription, advisedType, beautifyLocation(shadow.getSourceLocation()),
description, advisingType, beautifyLocation(munger.getSourceLocation()),
(runtimeTest ? " [with runtime test]" : "") }, advisedType, advisingType);
// Boolean.toString(runtimeTest)});
}
getMessageHandler().handleMessage(msg);
}
private boolean areTheSame(ISourceLocation locA, ISourceLocation locB) {
if (locA == null) {
return locB == null;
}
if (locB == null) {
return false;
}
if (locA.getLine() != locB.getLine()) {
return false;
}
File fA = locA.getSourceFile();
File fB = locA.getSourceFile();
if (fA == null) {
return fB == null;
}
if (fB == null) {
return false;
}
return fA.getName().equals(fB.getName());
}
/*
* Ensure we report a nice source location - particular in the case where the source info is missing (binary weave).
*/
private String beautifyLocation(ISourceLocation isl) {
StringBuffer nice = new StringBuffer();
if (isl == null || isl.getSourceFile() == null || isl.getSourceFile().getName().indexOf("no debug info available") != -1) {
nice.append("no debug info available");
} else {
// can't use File.getName() as this fails when a Linux box encounters a path created on Windows and vice-versa
int takeFrom = isl.getSourceFile().getPath().lastIndexOf('/');
if (takeFrom == -1) {
takeFrom = isl.getSourceFile().getPath().lastIndexOf('\\');
}
int binary = isl.getSourceFile().getPath().lastIndexOf('!');
if (binary != -1 && binary < takeFrom) {
// we have been woven by a binary aspect
String pathToBinaryLoc = isl.getSourceFile().getPath().substring(0, binary + 1);
if (pathToBinaryLoc.indexOf(".jar") != -1) {
// only want to add the extra info if we're from a jar file
int lastSlash = pathToBinaryLoc.lastIndexOf('/');
if (lastSlash == -1) {
lastSlash = pathToBinaryLoc.lastIndexOf('\\');
}
nice.append(pathToBinaryLoc.substring(lastSlash + 1));
}
}
nice.append(isl.getSourceFile().getPath().substring(takeFrom + 1));
if (isl.getLine() != 0) {
nice.append(":").append(isl.getLine());
}
// if it's a binary file then also want to give the file name
if (isl.getSourceFileName() != null) {
nice.append("(from " + isl.getSourceFileName() + ")");
}
}
return nice.toString();
}
private static List makeDefaultClasspath(String cp) {
List classPath = new ArrayList();
classPath.addAll(getPathEntries(cp));
classPath.addAll(getPathEntries(ClassPath.getClassPath()));
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);
setCrossReferenceHandler(xrefHandler);
// Tell BCEL to use us for resolving any classes
delegate = this;
}
public BcelWorld(ClassPathManager cpm, IMessageHandler handler, ICrossReferenceHandler xrefHandler) {
classPath = cpm;
setMessageHandler(handler);
setCrossReferenceHandler(xrefHandler);
// Tell BCEL to use us for resolving any classes
delegate = this;
}
/**
* Build a World from a ClassLoader, for LTW support
*
* @param loader
* @param handler
* @param xrefHandler
*/
public BcelWorld(ClassLoader loader, IMessageHandler handler, ICrossReferenceHandler xrefHandler) {
classPath = null;
loaderRef = new BcelWeakClassLoaderReference(loader);
setMessageHandler(handler);
setCrossReferenceHandler(xrefHandler);
// Tell BCEL to use us for resolving any classes
// delegate = getClassLoaderRepositoryFor(loader);
}
public void ensureRepositorySetup() {
if (delegate == null) {
delegate = getClassLoaderRepositoryFor(loaderRef);
}
}
public Repository getClassLoaderRepositoryFor(ClassLoaderReference loader) {
if (bcelRepositoryCaching) {
return new ClassLoaderRepository(loader);
} else {
return new NonCachingClassLoaderRepository(loader);
}
}
public void addPath(String name) {
classPath.addPath(name, this.getMessageHandler());
}
// ---- various interactions with bcel
public static Type makeBcelType(UnresolvedType type) {
return Type.getType(type.getErasureSignature());
}
static Type[] makeBcelTypes(UnresolvedType[] 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 Type[] makeBcelTypes(String[] types) {
if (types == null || types.length==0 ) {
return null;
}
Type[] ret = new Type[types.length];
for (int i=0, len=types.length; i", new ResolvedType[] { INT });
} else if (i instanceof MULTIANEWARRAY) {
MULTIANEWARRAY arrayInstruction = (MULTIANEWARRAY) i;
UnresolvedType ut = null;
short dimensions = arrayInstruction.getDimensions();
ObjectType ot = arrayInstruction.getLoadClassType(cpg);
if (ot != null) {
ut = fromBcel(ot);
ut = UnresolvedType.makeArray(ut, dimensions);
} else {
Type t = arrayInstruction.getType(cpg);
ut = fromBcel(t);
}
ResolvedType[] parms = new ResolvedType[dimensions];
for (int ii = 0; ii < dimensions; ii++) {
parms[ii] = INT;
}
retval = MemberImpl.method(ut, Modifier.PUBLIC, UnresolvedType.VOID, "", parms);
} else if (i.opcode == Constants.NEWARRAY) {
// NEWARRAY arrayInstruction = (NEWARRAY)i;
Type ot = i.getType();
UnresolvedType ut = fromBcel(ot);
retval = MemberImpl.method(ut, Modifier.PUBLIC, UnresolvedType.VOID, "", new ResolvedType[] { INT });
} else {
throw new BCException("Cannot create array construction signature for this non-array instruction:" + i);
}
return retval;
}
public Member makeJoinPointSignatureForMethodInvocation(LazyClassGen cg, InvokeInstruction ii) {
ConstantPool cpg = cg.getConstantPool();
String name = ii.getName(cpg);
String declaring = ii.getClassName(cpg);
UnresolvedType declaringType = null;
String signature = ii.getSignature(cpg);
// 307147
if (name.startsWith("ajc$privMethod$")) {
// The invoke is on a privileged accessor. These may be created for different
// kinds of target, not necessarily just private methods. In bug 307147 it is
// for a private method. This code is identifying the particular case in 307147
try {
declaringType = UnresolvedType.forName(declaring);
String typeNameAsFoundInAccessorName = declaringType.getName().replace('.', '_');
int indexInAccessorName = name.lastIndexOf(typeNameAsFoundInAccessorName);
if (indexInAccessorName != -1) {
String methodName = name.substring(indexInAccessorName+typeNameAsFoundInAccessorName.length()+1);
ResolvedType resolvedDeclaringType = declaringType.resolve(this);
ResolvedMember[] methods = resolvedDeclaringType.getDeclaredMethods();
for (ResolvedMember method: methods) {
if (method.getName().equals(methodName) && method.getSignature().equals(signature) && Modifier.isPrivate(method.getModifiers())) {
return method;
}
}
}
} catch (Exception e) {
// Remove this once confident above code isn't having unexpected side effects
// Added 1.8.7
e.printStackTrace();
}
}
int modifier = (ii instanceof INVOKEINTERFACE) ? Modifier.INTERFACE
: (ii.opcode == Constants.INVOKESTATIC) ? Modifier.STATIC : (ii.opcode == Constants.INVOKESPECIAL && !name
.equals("")) ? Modifier.PRIVATE : 0;
// in Java 1.4 and after, static method call of super class within
// subclass method appears
// as declared by the subclass in the bytecode - but they are not
// see #104212
if (ii.opcode == Constants.INVOKESTATIC) {
ResolvedType appearsDeclaredBy = resolve(declaring);
// look for the method there
for (Iterator iterator = appearsDeclaredBy.getMethods(true, true); iterator.hasNext();) {
ResolvedMember method = iterator.next();
if (Modifier.isStatic(method.getModifiers())) {
if (name.equals(method.getName()) && signature.equals(method.getSignature())) {
// we found it
declaringType = method.getDeclaringType();
break;
}
}
}
}
if (declaringType == null) {
if (declaring.charAt(0) == '[') {
declaringType = UnresolvedType.forSignature(declaring);
} else {
declaringType = UnresolvedType.forName(declaring);
}
}
return MemberImpl.method(declaringType, modifier, name, signature);
}
@Override
public String toString() {
StringBuffer buf = new StringBuffer();
buf.append("BcelWorld(");
// buf.append(shadowMungerMap);
buf.append(")");
return buf.toString();
}
/**
* Retrieve a bcel delegate for an aspect - this will return NULL if the delegate is an EclipseSourceType and not a
* BcelObjectType - this happens quite often when incrementally compiling.
*/
public static BcelObjectType getBcelObjectType(ResolvedType concreteAspect) {
if (concreteAspect == null) {
return null;
}
if (!(concreteAspect instanceof ReferenceType)) { // Might be Missing
return null;
}
ReferenceTypeDelegate rtDelegate = ((ReferenceType) concreteAspect).getDelegate();
if (rtDelegate instanceof BcelObjectType) {
return (BcelObjectType) rtDelegate;
} else {
return null;
}
}
public void tidyUp() {
// At end of compile, close any open files so deletion of those archives
// is possible
classPath.closeArchives();
typeMap.report();
typeMap.demote(true);
// ResolvedType.resetPrimitives();
}
// / The repository interface methods
@Override
public JavaClass findClass(String className) {
return lookupJavaClass(classPath, className);
}
@Override
public JavaClass loadClass(String className) throws ClassNotFoundException {
return lookupJavaClass(classPath, className);
}
@Override
public void storeClass(JavaClass clazz) {
// doesn't need to do anything
}
@Override
public void removeClass(JavaClass clazz) {
throw new RuntimeException("Not implemented");
}
@Override
public JavaClass loadClass(Class clazz) throws ClassNotFoundException {
throw new RuntimeException("Not implemented");
}
@Override
public void clear() {
delegate.clear();
// throw new RuntimeException("Not implemented");
}
/**
* The aim of this method is to make sure a particular type is 'ok'. Some operations on the delegate for a type modify it and
* this method is intended to undo that... see pr85132
*/
@Override
public void validateType(UnresolvedType type) {
ResolvedType result = typeMap.get(type.getSignature());
if (result == null) {
return; // We haven't heard of it yet
}
if (!result.isExposedToWeaver()) {
return; // cant need resetting
}
result.ensureConsistent();
// If we want to rebuild it 'from scratch' then:
// ClassParser cp = new ClassParser(new
// ByteArrayInputStream(newbytes),new String(cs));
// try {
// rt.setDelegate(makeBcelObjectType(rt,cp.parse(),true));
// } catch (ClassFormatException e) {
// e.printStackTrace();
// } catch (IOException e) {
// e.printStackTrace();
// }
}
/**
* Apply a single declare parents - return true if we change the type
*/
private boolean applyDeclareParents(DeclareParents p, ResolvedType onType) {
boolean didSomething = false;
List newParents = p.findMatchingNewParents(onType, true);
if (!newParents.isEmpty()) {
didSomething = true;
BcelObjectType classType = BcelWorld.getBcelObjectType(onType);
// System.err.println("need to do declare parents for: " + onType);
for (ResolvedType newParent : newParents) {
// We set it here so that the imminent matching for ITDs can
// succeed - we still haven't done the necessary changes to the class file
// itself (like transform super calls) - that is done in
// BcelTypeMunger.mungeNewParent()
// classType.addParent(newParent);
onType.addParent(newParent);
ResolvedTypeMunger newParentMunger = new NewParentTypeMunger(newParent, p.getDeclaringType());
newParentMunger.setSourceLocation(p.getSourceLocation());
onType.addInterTypeMunger(new BcelTypeMunger(newParentMunger, getCrosscuttingMembersSet()
.findAspectDeclaringParents(p)), false);
}
}
return didSomething;
}
/**
* Apply a declare @type - return true if we change the type
*/
private boolean applyDeclareAtType(DeclareAnnotation decA, ResolvedType onType, boolean reportProblems) {
boolean didSomething = false;
if (decA.matches(onType)) {
if (onType.hasAnnotation(decA.getAnnotation().getType())) {
// already has it
return false;
}
AnnotationAJ annoX = decA.getAnnotation();
// check the annotation is suitable for the target
boolean isOK = checkTargetOK(decA, onType, annoX);
if (isOK) {
didSomething = true;
ResolvedTypeMunger newAnnotationTM = new AnnotationOnTypeMunger(annoX);
newAnnotationTM.setSourceLocation(decA.getSourceLocation());
onType.addInterTypeMunger(new BcelTypeMunger(newAnnotationTM, decA.getAspect().resolve(this)), false);
decA.copyAnnotationTo(onType);
}
}
return didSomething;
}
/**
* Apply the specified declare @field construct to any matching fields in the specified type.
* @param deca the declare annotation targeting fields
* @param type the type to check for members matching the declare annotation
* @return true if something matched and the type was modified
*/
private boolean applyDeclareAtField(DeclareAnnotation deca, ResolvedType type) {
boolean changedType = false;
ResolvedMember[] fields = type.getDeclaredFields();
for (ResolvedMember field: fields) {
if (deca.matches(field, this)) {
AnnotationAJ anno = deca.getAnnotation();
if (!field.hasAnnotation(anno.getType())) {
field.addAnnotation(anno);
changedType=true;
}
}
}
return changedType;
}
/**
* Checks for an @target() on the annotation and if found ensures it allows the annotation to be attached to the target type
* that matched.
*/
private boolean checkTargetOK(DeclareAnnotation decA, ResolvedType onType, AnnotationAJ annoX) {
if (annoX.specifiesTarget()) {
if ((onType.isAnnotation() && !annoX.allowedOnAnnotationType()) || (!annoX.allowedOnRegularType())) {
return false;
}
}
return true;
}
// Hmmm - very similar to the code in BcelWeaver.weaveParentTypeMungers -
// this code
// doesn't need to produce errors/warnings though as it won't really be
// weaving.
protected void weaveInterTypeDeclarations(ResolvedType onType) {
List declareParentsList = getCrosscuttingMembersSet().getDeclareParents();
if (onType.isRawType()) {
onType = onType.getGenericType();
}
onType.clearInterTypeMungers();
List decpToRepeat = new ArrayList();
boolean aParentChangeOccurred = false;
boolean anAnnotationChangeOccurred = false;
// First pass - apply all decp mungers
for (Iterator i = declareParentsList.iterator(); i.hasNext();) {
DeclareParents decp = i.next();
boolean typeChanged = applyDeclareParents(decp, onType);
if (typeChanged) {
aParentChangeOccurred = true;
} else { // Perhaps it would have matched if a 'dec @type' had
// modified the type
if (!decp.getChild().isStarAnnotation()) {
decpToRepeat.add(decp);
}
}
}
// Still first pass - apply all dec @type mungers
for (DeclareAnnotation decA : getCrosscuttingMembersSet().getDeclareAnnotationOnTypes()) {
boolean typeChanged = applyDeclareAtType(decA, onType, true);
if (typeChanged) {
anAnnotationChangeOccurred = true;
}
}
// apply declare @field
for (DeclareAnnotation deca: getCrosscuttingMembersSet().getDeclareAnnotationOnFields()) {
if (applyDeclareAtField(deca,onType)) {
anAnnotationChangeOccurred = true;
}
}
while ((aParentChangeOccurred || anAnnotationChangeOccurred) && !decpToRepeat.isEmpty()) {
anAnnotationChangeOccurred = aParentChangeOccurred = false;
List decpToRepeatNextTime = new ArrayList();
for (DeclareParents decp: decpToRepeat) {
if (applyDeclareParents(decp, onType)) {
aParentChangeOccurred = true;
} else {
decpToRepeatNextTime.add(decp);
}
}
for (DeclareAnnotation deca: getCrosscuttingMembersSet().getDeclareAnnotationOnTypes()) {
if (applyDeclareAtType(deca, onType, false)) {
anAnnotationChangeOccurred = true;
}
}
for (DeclareAnnotation deca: getCrosscuttingMembersSet().getDeclareAnnotationOnFields()) {
if (applyDeclareAtField(deca, onType)) {
anAnnotationChangeOccurred = true;
}
}
decpToRepeat = decpToRepeatNextTime;
}
}
@Override
public IWeavingSupport getWeavingSupport() {
return bcelWeavingSupport;
}
@Override
public void reportCheckerMatch(Checker checker, Shadow shadow) {
IMessage iMessage = new Message(checker.getMessage(shadow), shadow.toString(), checker.isError() ? IMessage.ERROR
: IMessage.WARNING, shadow.getSourceLocation(), null, new ISourceLocation[] { checker.getSourceLocation() }, true,
0, -1, -1);
getMessageHandler().handleMessage(iMessage);
if (getCrossReferenceHandler() != null) {
getCrossReferenceHandler()
.addCrossReference(
checker.getSourceLocation(),
shadow.getSourceLocation(),
(checker.isError() ? IRelationship.Kind.DECLARE_ERROR.getName() : IRelationship.Kind.DECLARE_WARNING
.getName()), false);
}
if (getModel() != null) {
AsmRelationshipProvider.addDeclareErrorOrWarningRelationship(getModelAsAsmManager(), shadow, checker);
}
}
public AsmManager getModelAsAsmManager() {
return (AsmManager) getModel(); // For now... always an AsmManager in a bcel environment
}
void raiseError(String message) {
getMessageHandler().handleMessage(MessageUtil.error(message));
}
/**
* These are aop.xml files that can be used to alter the aspects that actually apply from those passed in - and also their scope
* of application to other files in the system.
*
* @param xmlFiles list of File objects representing any aop.xml files passed in to configure the build process
*/
public void setXmlFiles(List xmlFiles) {
if (!isXmlConfiguredWorld && !xmlFiles.isEmpty()) {
raiseError("xml configuration files only supported by the compiler when -xmlConfigured option specified");
return;
}
if (!xmlFiles.isEmpty()) {
xmlConfiguration = new WeavingXmlConfig(this, WeavingXmlConfig.MODE_COMPILE);
}
for (File xmlfile : xmlFiles) {
try {
Definition d = DocumentParser.parse(xmlfile.toURI().toURL());
xmlConfiguration.add(d);
} catch (MalformedURLException e) {
raiseError("Unexpected problem processing XML config file '" + xmlfile.getName() + "' :" + e.getMessage());
} catch (Exception e) {
raiseError("Unexpected problem processing XML config file '" + xmlfile.getName() + "' :" + e.getMessage());
}
}
}
/**
* Add a scoped aspects where the scoping was defined in an aop.xml file and this world is being used in a LTW configuration
*/
public void addScopedAspect(String name, String scope) {
this.isXmlConfiguredWorld = true;
if (xmlConfiguration == null) {
xmlConfiguration = new WeavingXmlConfig(this, WeavingXmlConfig.MODE_LTW);
}
xmlConfiguration.addScopedAspect(name, scope);
}
public void setXmlConfigured(boolean b) {
this.isXmlConfiguredWorld = b;
}
@Override
public boolean isXmlConfigured() {
return isXmlConfiguredWorld && xmlConfiguration != null;
}
public WeavingXmlConfig getXmlConfiguration() {
return xmlConfiguration;
}
@Override
public boolean isAspectIncluded(ResolvedType aspectType) {
if (!isXmlConfigured()) {
return true;
}
return xmlConfiguration.specifiesInclusionOfAspect(aspectType.getName());
}
@Override
public TypePattern getAspectScope(ResolvedType declaringType) {
return xmlConfiguration.getScopeFor(declaringType.getName());
}
@Override
public boolean hasUnsatisfiedDependency(ResolvedType aspectType) {
String aspectName = aspectType.getName();
if (aspectType.hasAnnotations()) {
AnnotationAJ[] annos = aspectType.getAnnotations();
for (AnnotationAJ anno: annos) {
if (anno.getTypeName().equals("org.aspectj.lang.annotation.RequiredTypes")) {
String values = anno.getStringFormOfValue("value"); // Example: "[A,org.foo.Bar]"
if (values != null && values.length() > 2) {
values = values.substring(1,values.length()-1);
StringTokenizer tokenizer = new StringTokenizer(values,",");
boolean anythingMissing = false;
while (tokenizer.hasMoreElements()) {
String requiredTypeName = tokenizer.nextToken();
ResolvedType rt = resolve(UnresolvedType.forName(requiredTypeName));
if (rt.isMissing()) {
if (!getMessageHandler().isIgnoring(IMessage.INFO)) {
getMessageHandler().handleMessage(
MessageUtil.info("deactivating aspect '" + aspectName + "' as it requires type '"
+ requiredTypeName + "' which cannot be found on the classpath"));
}
anythingMissing = true;
if (aspectRequiredTypes == null) {
aspectRequiredTypes = new HashMap();
}
// Record that it has an invalid type reference
aspectRequiredTypes.put(aspectName,requiredTypeName);
}
}
if (anythingMissing) {
return true;
}
else {
return false;
}
}
else {
// no value specified for annotation
return false;
}
}
}
}
if (aspectRequiredTypes == null) {
// no aspects require anything, so there can be no unsatisfied dependencies
return false;
}
if (!aspectRequiredTypesProcessed.contains(aspectName)) {
String requiredTypeName = aspectRequiredTypes.get(aspectName);
if (requiredTypeName==null) {
aspectRequiredTypesProcessed.add(aspectName);
return false;
} else {
ResolvedType rt = resolve(UnresolvedType.forName(requiredTypeName));
if (!rt.isMissing()) {
aspectRequiredTypesProcessed.add(aspectName);
aspectRequiredTypes.remove(aspectName);
return false;
} else {
if (!getMessageHandler().isIgnoring(IMessage.INFO)) {
getMessageHandler().handleMessage(
MessageUtil.info("deactivating aspect '" + aspectName + "' as it requires type '"
+ requiredTypeName + "' which cannot be found on the classpath"));
}
aspectRequiredTypesProcessed.add(aspectName);
return true;
}
}
}
return aspectRequiredTypes.containsKey(aspectName);
}
private List aspectRequiredTypesProcessed = new ArrayList();
private Map aspectRequiredTypes = null;
public void addAspectRequires(String aspectClassName, String requiredType) {
if (aspectRequiredTypes == null) {
aspectRequiredTypes = new HashMap();
}
aspectRequiredTypes.put(aspectClassName,requiredType);
}
/**
* A WeavingXmlConfig is initially a collection of definitions from XML files - once the world is ready and weaving is running
* it will initialize and transform those definitions into an optimized set of values (eg. resolve type patterns and string
* names to real entities). It can then answer questions quickly: (1) is this aspect included in the weaving? (2) Is there a
* scope specified for this aspect and does it include type X?
*
*/
static class WeavingXmlConfig {
final static int MODE_COMPILE = 1;
final static int MODE_LTW = 2;
private int mode;
private boolean initialized = false; // Lazily done
private List definitions = new ArrayList();
private List resolvedIncludedAspects = new ArrayList();
private Map scopes = new HashMap();
// these are not set for LTW mode (exclusion of these fast match patterns is handled before the weaver/world are used)
private List includedFastMatchPatterns = Collections.emptyList();
private List includedPatterns = Collections.emptyList();
private List excludedFastMatchPatterns = Collections.emptyList();
private List excludedPatterns = Collections.emptyList();
private BcelWorld world;
public WeavingXmlConfig(BcelWorld bcelWorld, int mode) {
this.world = bcelWorld;
this.mode = mode;
}
public void add(Definition d) {
definitions.add(d);
}
public void addScopedAspect(String aspectName, String scope) {
ensureInitialized();
resolvedIncludedAspects.add(aspectName);
try {
TypePattern scopePattern = new PatternParser(scope).parseTypePattern();
scopePattern.resolve(world);
scopes.put(aspectName, scopePattern);
if (!world.getMessageHandler().isIgnoring(IMessage.INFO)) {
world.getMessageHandler().handleMessage(
MessageUtil.info("Aspect '" + aspectName + "' is scoped to apply against types matching pattern '"
+ scopePattern.toString() + "'"));
}
} catch (Exception e) {
world.getMessageHandler().handleMessage(
MessageUtil.error("Unable to parse scope as type pattern. Scope was '" + scope + "': " + e.getMessage()));
}
}
public void ensureInitialized() {
if (!initialized) {
try {
resolvedIncludedAspects = new ArrayList();
// Process the definitions into something more optimal
for (Definition definition : definitions) {
List aspectNames = definition.getAspectClassNames();
for (String name : aspectNames) {
resolvedIncludedAspects.add(name);
// TODO check for existence?
// ResolvedType resolvedAspect = resolve(UnresolvedType.forName(name));
// if (resolvedAspect.isMissing()) {
// // ERROR
// } else {
// resolvedIncludedAspects.add(resolvedAspect);
// }
String scope = definition.getScopeForAspect(name);
if (scope != null) {
// Resolve the type pattern
try {
TypePattern scopePattern = new PatternParser(scope).parseTypePattern();
scopePattern.resolve(world);
scopes.put(name, scopePattern);
if (!world.getMessageHandler().isIgnoring(IMessage.INFO)) {
world.getMessageHandler().handleMessage(
MessageUtil.info("Aspect '" + name
+ "' is scoped to apply against types matching pattern '"
+ scopePattern.toString() + "'"));
}
} catch (Exception e) {
// TODO definitions should remember which file they came from, for inclusion in this message
world.getMessageHandler().handleMessage(
MessageUtil.error("Unable to parse scope as type pattern. Scope was '" + scope + "': "
+ e.getMessage()));
}
}
}
try {
List includePatterns = definition.getIncludePatterns();
if (includePatterns.size() > 0) {
includedPatterns = new ArrayList();
includedFastMatchPatterns = new ArrayList();
}
for (String includePattern : includePatterns) {
if (includePattern.endsWith("..*")) {
// from 'blah.blah.blah..*' leave the 'blah.blah.blah.'
includedFastMatchPatterns.add(includePattern.substring(0, includePattern.length() - 2));
} else {
TypePattern includedPattern = new PatternParser(includePattern).parseTypePattern();
includedPatterns.add(includedPattern);
}
}
List excludePatterns = definition.getExcludePatterns();
if (excludePatterns.size() > 0) {
excludedPatterns = new ArrayList();
excludedFastMatchPatterns = new ArrayList();
}
for (String excludePattern : excludePatterns) {
if (excludePattern.endsWith("..*")) {
// from 'blah.blah.blah..*' leave the 'blah.blah.blah.'
excludedFastMatchPatterns.add(excludePattern.substring(0, excludePattern.length() - 2));
} else {
TypePattern excludedPattern = new PatternParser(excludePattern).parseTypePattern();
excludedPatterns.add(excludedPattern);
}
}
} catch (ParserException pe) {
// TODO definitions should remember which file they came from, for inclusion in this message
world.getMessageHandler().handleMessage(
MessageUtil.error("Unable to parse type pattern: " + pe.getMessage()));
}
}
} finally {
initialized = true;
}
}
}
public boolean specifiesInclusionOfAspect(String name) {
ensureInitialized();
return resolvedIncludedAspects.contains(name);
}
public TypePattern getScopeFor(String name) {
return scopes.get(name);
}
// Can't quite follow the same rules for exclusion as used for loadtime weaving:
// "The set of types to be woven are those types matched by at least one weaver include element and not matched by any
// weaver
// exclude element. If there are no weaver include statements then all non-excluded types are included."
// Since if the weaver is seeing it during this kind of build, the type is implicitly included. So all we should check
// for is exclusion
public boolean excludesType(ResolvedType type) {
if (mode == MODE_LTW) {
return false;
}
String typename = type.getName();
boolean excluded = false;
for (String excludedPattern : excludedFastMatchPatterns) {
if (typename.startsWith(excludedPattern)) {
excluded = true;
break;
}
}
if (!excluded) {
for (TypePattern excludedPattern : excludedPatterns) {
if (excludedPattern.matchesStatically(type)) {
excluded = true;
break;
}
}
}
return excluded;
}
}
@Override
public TypeMap getTypeMap() {
return typeMap;
}
@Override
public boolean isLoadtimeWeaving() {
return false;
}
public void addTypeDelegateResolver(TypeDelegateResolver typeDelegateResolver) {
if (typeDelegateResolvers == null) {
typeDelegateResolvers = new ArrayList();
}
typeDelegateResolvers.add(typeDelegateResolver);
}
@Override
public void classWriteEvent(char[][] compoundName) {
typeMap.classWriteEvent(new String(CharOperation.concatWith(compoundName, '.')));
}
/**
* Force demote a type.
*/
public void demote(ResolvedType type) {
typeMap.demote(type);
}
}