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/* *******************************************************************
* Copyright (c) 2002-2009 Contributors
* 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
* ******************************************************************/
package org.aspectj.weaver;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.MessageUtil;
import org.aspectj.weaver.patterns.Declare;
import org.aspectj.weaver.patterns.DeclareAnnotation;
import org.aspectj.weaver.patterns.DeclareParents;
import org.aspectj.weaver.patterns.DeclareSoft;
import org.aspectj.weaver.patterns.DeclareTypeErrorOrWarning;
import org.aspectj.weaver.patterns.IVerificationRequired;
/**
* This holds on to all CrosscuttingMembers for a world. It handles management of change.
*
* @author Jim Hugunin
* @author Andy Clement
*/
public class CrosscuttingMembersSet {
private transient World world;
// FIXME AV - ? we may need a sequencedHashMap there to ensure source based precedence for @AJ advice
private final Map members = new HashMap();
// List of things to be verified once the type system is 'complete'
private transient List verificationList = null;
private List shadowMungers = null;
private List typeMungers = null;
private List lateTypeMungers = null;
private List declareSofts = null;
private List declareParents = null;
private List declareAnnotationOnTypes = null;
private List declareAnnotationOnFields = null;
private List declareAnnotationOnMethods = null; // includes constructors
private List declareTypeEows = null;
private List declareDominates = null;
private boolean changedSinceLastReset = false;
public CrosscuttingMembersSet(World world) {
this.world = world;
}
public boolean addOrReplaceAspect(ResolvedType aspectType) {
return addOrReplaceAspect(aspectType, true);
}
/**
* Check if any parent aspects of the supplied aspect have unresolved dependencies (and so
* should cause this aspect to be turned off).
* @param aspectType the aspect whose parents should be checked
* @return true if this aspect should be excluded because of a parents' missing dependencies
*/
private boolean excludeDueToParentAspectHavingUnresolvedDependency(ResolvedType aspectType) {
ResolvedType parent = aspectType.getSuperclass();
boolean excludeDueToParent = false;
while (parent != null) {
if (parent.isAspect() && parent.isAbstract() && world.hasUnsatisfiedDependency(parent)) {
if (!world.getMessageHandler().isIgnoring(IMessage.INFO)) {
world.getMessageHandler().handleMessage(
MessageUtil.info("deactivating aspect '" + aspectType.getName() + "' as the parent aspect '"+parent.getName()+
"' has unsatisfied dependencies"));
}
excludeDueToParent = true;
}
parent = parent.getSuperclass();
}
return excludeDueToParent;
}
/**
* @return whether or not that was a change to the global signature XXX for efficiency we will need a richer representation than
* this
*/
public boolean addOrReplaceAspect(ResolvedType aspectType, boolean inWeavingPhase) {
if (!world.isAspectIncluded(aspectType)) {
return false;
}
if (world.hasUnsatisfiedDependency(aspectType)) {
return false;
}
// Abstract super aspects might have unsatisfied dependencies
if (excludeDueToParentAspectHavingUnresolvedDependency(aspectType)) {
return false;
}
boolean change = false;
CrosscuttingMembers xcut = members.get(aspectType);
if (xcut == null) {
members.put(aspectType, aspectType.collectCrosscuttingMembers(inWeavingPhase));
clearCaches();
change = true;
} else {
if (xcut.replaceWith(aspectType.collectCrosscuttingMembers(inWeavingPhase), inWeavingPhase)) {
clearCaches();
change = true;
} else {
if (inWeavingPhase) {
// bug 134541 - even though we haven't changed we may have updated the
// sourcelocation for the shadowMunger which we need to pick up
shadowMungers = null;
}
change = false;
}
}
if (aspectType.isAbstract()) {
// we might have sub-aspects that need to re-collect their crosscutting members from us
boolean ancestorChange = addOrReplaceDescendantsOf(aspectType, inWeavingPhase);
change = change || ancestorChange;
}
changedSinceLastReset = changedSinceLastReset || change;
return change;
}
private boolean addOrReplaceDescendantsOf(ResolvedType aspectType, boolean inWeavePhase) {
// System.err.println("Looking at descendants of "+aspectType.getName());
Set knownAspects = members.keySet();
Set toBeReplaced = new HashSet();
for (Iterator it = knownAspects.iterator(); it.hasNext();) {
ResolvedType candidateDescendant = it.next();
// allowMissing = true - if something is missing, it really probably is not a descendant
if ((candidateDescendant != aspectType) && (aspectType.isAssignableFrom(candidateDescendant, true))) {
toBeReplaced.add(candidateDescendant);
}
}
boolean change = false;
for (Iterator it = toBeReplaced.iterator(); it.hasNext();) {
ResolvedType next = it.next();
boolean thisChange = addOrReplaceAspect(next, inWeavePhase);
change = change || thisChange;
}
return change;
}
public void addAdviceLikeDeclares(ResolvedType aspectType) {
if (!members.containsKey(aspectType)) {
return;
}
CrosscuttingMembers xcut = members.get(aspectType);
xcut.addDeclares(aspectType.collectDeclares(true));
}
public boolean deleteAspect(UnresolvedType aspectType) {
boolean isAspect = members.remove(aspectType) != null;
clearCaches();
return isAspect;
}
public boolean containsAspect(UnresolvedType aspectType) {
return members.containsKey(aspectType);
}
// XXX only for testing
public void addFixedCrosscuttingMembers(ResolvedType aspectType) {
members.put(aspectType, aspectType.crosscuttingMembers);
clearCaches();
}
private void clearCaches() {
shadowMungers = null;
typeMungers = null;
lateTypeMungers = null;
declareSofts = null;
declareParents = null;
declareAnnotationOnFields = null;
declareAnnotationOnMethods = null;
declareAnnotationOnTypes = null;
declareDominates = null;
}
public List getShadowMungers() {
if (shadowMungers == null) {
List ret = new ArrayList();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getShadowMungers());
}
shadowMungers = ret;
}
return shadowMungers;
}
public List getTypeMungers() {
if (typeMungers == null) {
List ret = new ArrayList();
for (CrosscuttingMembers xmembers : members.values()) {
// With 1.6.9 there is a change that enables use of more optimal accessors (accessors for private fields).
// Here is where we determine if two aspects are asking for access to the same field. If they are
// and
// In the new style multiple aspects can share the same privileged accessors, so here we check if
// two aspects are asking for access to the same field. If they are then we don't add a duplicate
// accessor.
for (ConcreteTypeMunger mungerToAdd : xmembers.getTypeMungers()) {
ResolvedTypeMunger resolvedMungerToAdd = mungerToAdd.getMunger();
if (isNewStylePrivilegedAccessMunger(resolvedMungerToAdd)) {
String newFieldName = resolvedMungerToAdd.getSignature().getName();
boolean alreadyExists = false;
for (ConcreteTypeMunger existingMunger : ret) {
ResolvedTypeMunger existing = existingMunger.getMunger();
if (isNewStylePrivilegedAccessMunger(existing)) {
String existingFieldName = existing.getSignature().getName();
if (existingFieldName.equals(newFieldName)
&& existing.getSignature().getDeclaringType().equals(
resolvedMungerToAdd.getSignature().getDeclaringType())) {
alreadyExists = true;
break;
}
}
}
if (!alreadyExists) {
ret.add(mungerToAdd);
}
} else {
ret.add(mungerToAdd);
}
}
}
typeMungers = ret;
}
return typeMungers;
}
/**
* Retrieve a subset of all known mungers, those of a specific kind.
*
* @param kind the kind of munger requested
* @return a list of those mungers (list is empty if none found)
*/
public List getTypeMungersOfKind(ResolvedTypeMunger.Kind kind) {
List collected = null;
for (ConcreteTypeMunger typeMunger : typeMungers) {
if (typeMunger.getMunger() != null && typeMunger.getMunger().getKind() == kind) {
if (collected == null) {
collected = new ArrayList();
}
collected.add(typeMunger);
}
}
if (collected == null) {
return Collections.emptyList();
} else {
return collected;
}
}
/**
* Determine if the type munger is: (1) for privileged access (2) for a normally non visible field (3) is from an aspect wanting
* 'old style' (ie. long) accessor names
*/
private boolean isNewStylePrivilegedAccessMunger(ResolvedTypeMunger typeMunger) {
boolean b = (typeMunger != null && typeMunger.getKind() == ResolvedTypeMunger.PrivilegedAccess && typeMunger.getSignature()
.getKind() == Member.FIELD);
if (!b) {
return b;
}
PrivilegedAccessMunger privAccessMunger = (PrivilegedAccessMunger) typeMunger;
return privAccessMunger.shortSyntax;
}
public List getLateTypeMungers() {
if (lateTypeMungers == null) {
List ret = new ArrayList();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getLateTypeMungers());
}
lateTypeMungers = ret;
}
return lateTypeMungers;
}
public List getDeclareSofts() {
if (declareSofts == null) {
Set ret = new HashSet();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getDeclareSofts());
}
declareSofts = new ArrayList();
declareSofts.addAll(ret);
}
return declareSofts;
}
public List getDeclareParents() {
if (declareParents == null) {
Set ret = new HashSet();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getDeclareParents());
}
declareParents = new ArrayList();
declareParents.addAll(ret);
}
return declareParents;
}
/**
* @return an amalgamation of the declare @type statements.
*/
public List getDeclareAnnotationOnTypes() {
if (declareAnnotationOnTypes == null) {
Set ret = new LinkedHashSet();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getDeclareAnnotationOnTypes());
}
declareAnnotationOnTypes = new ArrayList();
declareAnnotationOnTypes.addAll(ret);
}
return declareAnnotationOnTypes;
}
/**
* @return an amalgamation of the declare @field statements.
*/
public List getDeclareAnnotationOnFields() {
if (declareAnnotationOnFields == null) {
Set ret = new LinkedHashSet();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getDeclareAnnotationOnFields());
}
declareAnnotationOnFields = new ArrayList();
declareAnnotationOnFields.addAll(ret);
}
return declareAnnotationOnFields;
}
/**
* @return an amalgamation of the declare @method/@constructor statements.
*/
public List getDeclareAnnotationOnMethods() {
if (declareAnnotationOnMethods == null) {
Set ret = new LinkedHashSet();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getDeclareAnnotationOnMethods());
}
declareAnnotationOnMethods = new ArrayList();
declareAnnotationOnMethods.addAll(ret);
// world.sortDeclareAnnotations(declareAnnotationOnMethods);
}
return declareAnnotationOnMethods;
}
/**
* Return an amalgamation of the declare type eow statements
*/
public List getDeclareTypeEows() {
if (declareTypeEows == null) {
Set ret = new HashSet();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getDeclareTypeErrorOrWarning());
}
declareTypeEows = new ArrayList();
declareTypeEows.addAll(ret);
}
return declareTypeEows;
}
public List getDeclareDominates() {
if (declareDominates == null) {
List ret = new ArrayList();
for (Iterator i = members.values().iterator(); i.hasNext();) {
ret.addAll(i.next().getDeclareDominates());
}
declareDominates = ret;
}
return declareDominates;
}
public ResolvedType findAspectDeclaringParents(DeclareParents p) {
Set keys = this.members.keySet();
for (Iterator iter = keys.iterator(); iter.hasNext();) {
ResolvedType element = iter.next();
for (Iterator i = members.get(element).getDeclareParents().iterator(); i.hasNext();) {
DeclareParents dp = (DeclareParents) i.next();
if (dp.equals(p)) {
return element;
}
}
}
return null;
}
public void reset() {
verificationList = null;
changedSinceLastReset = false;
}
public boolean hasChangedSinceLastReset() {
return changedSinceLastReset;
}
/**
* Record something that needs verifying when we believe the type system is complete. Used for things that can't be verified as
* we go along - for example some recursive type variable references (pr133307)
*/
public void recordNecessaryCheck(IVerificationRequired verification) {
if (verificationList == null) {
verificationList = new ArrayList();
}
verificationList.add(verification);
}
/**
* Called when type bindings are complete - calls all registered verification objects in turn.
*/
public void verify() {
if (verificationList == null) {
return;
}
for (Iterator iter = verificationList.iterator(); iter.hasNext();) {
IVerificationRequired element = iter.next();
element.verify();
}
verificationList = null;
}
public int serializationVersion = 1;
public void write(CompressingDataOutputStream stream) throws IOException {
// stream.writeInt(serializationVersion);
stream.writeInt(shadowMungers.size());
for (Iterator iterator = shadowMungers.iterator(); iterator.hasNext();) {
ShadowMunger shadowMunger = (ShadowMunger) iterator.next();
shadowMunger.write(stream);
}
// // private List /* ShadowMunger */shadowMungers = null;
// // private List typeMungers = null;
// // private List lateTypeMungers = null;
// // private List declareSofts = null;
// // private List declareParents = null;
// // private List declareAnnotationOnTypes = null;
// // private List declareAnnotationOnFields = null;
// // private List declareAnnotationOnMethods = null; // includes constructors
// // private List declareDominates = null;
// // private boolean changedSinceLastReset = false;
//
}
}
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