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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/* *******************************************************************
* Copyright (c) 1999-2001 Xerox Corporation,
* 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:
* Xerox/PARC initial implementation
* ******************************************************************/
package org.aspectj.runtime.reflect;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.reflect.SourceLocation;
import org.aspectj.runtime.internal.AroundClosure;
import java.util.ArrayList;
import java.util.List;
class JoinPointImpl implements ProceedingJoinPoint {
static class StaticPartImpl implements JoinPoint.StaticPart {
String kind;
Signature signature;
SourceLocation sourceLocation;
private int id;
public StaticPartImpl(int id, String kind, Signature signature, SourceLocation sourceLocation) {
this.kind = kind;
this.signature = signature;
this.sourceLocation = sourceLocation;
this.id = id;
}
public int getId() {
return id;
}
public String getKind() {
return kind;
}
public Signature getSignature() {
return signature;
}
public SourceLocation getSourceLocation() {
return sourceLocation;
}
String toString(StringMaker sm) {
StringBuilder buf = new StringBuilder();
buf.append(sm.makeKindName(getKind()));
buf.append("(");
buf.append(((SignatureImpl) getSignature()).toString(sm));
buf.append(")");
return buf.toString();
}
public final String toString() {
return toString(StringMaker.middleStringMaker);
}
public final String toShortString() {
return toString(StringMaker.shortStringMaker);
}
public final String toLongString() {
return toString(StringMaker.longStringMaker);
}
}
static class EnclosingStaticPartImpl extends StaticPartImpl implements EnclosingStaticPart {
public EnclosingStaticPartImpl(int count, String kind, Signature signature, SourceLocation sourceLocation) {
super(count, kind, signature, sourceLocation);
}
}
Object _this;
Object target;
Object[] args;
org.aspectj.lang.JoinPoint.StaticPart staticPart;
public JoinPointImpl(org.aspectj.lang.JoinPoint.StaticPart staticPart, Object _this, Object target, Object[] args) {
this.staticPart = staticPart;
this._this = _this;
this.target = target;
this.args = args;
}
public Object getThis() {
return _this;
}
public Object getTarget() {
return target;
}
public Object[] getArgs() {
if (args == null) {
args = new Object[0];
}
Object[] argsCopy = new Object[args.length];
System.arraycopy(args, 0, argsCopy, 0, args.length);
return argsCopy;
}
public org.aspectj.lang.JoinPoint.StaticPart getStaticPart() {
return staticPart;
}
public String getKind() {
return staticPart.getKind();
}
public Signature getSignature() {
return staticPart.getSignature();
}
public SourceLocation getSourceLocation() {
return staticPart.getSourceLocation();
}
public final String toString() {
return staticPart.toString();
}
public final String toShortString() {
return staticPart.toShortString();
}
public final String toLongString() {
return staticPart.toLongString();
}
// To proceed we need a closure to proceed on. Generated code
// will either be using arc or arcs but not both. arcs being non-null
// indicates it is in use (even if an empty stack)
private AroundClosure arc = null;
private List arcs = null;
private final ThreadLocal arcIndex = ThreadLocal.withInitial(() -> arcs == null ? -1 : arcs.size() - 1);
public void set$AroundClosure(AroundClosure arc) {
this.arc = arc;
}
public void stack$AroundClosure(AroundClosure arc) {
// If input parameter arc is null this is the 'unlink' call from AroundClosure
if (arcs == null) {
arcs = new ArrayList<>();
}
if (arc == null) {
arcIndex.set(arcIndex.get() - 1);
}
else {
this.arcs.add(arc);
arcIndex.set(arcs.size() - 1);
}
}
public Object proceed() throws Throwable {
// when called from a before advice, but be a no-op
if (arcs == null) {
if (arc == null) {
return null;
} else {
return arc.run(arc.getState());
}
} else {
final AroundClosure ac = arcs.get(arcIndex.get());
return ac.run(ac.getState());
}
}
public Object proceed(Object[] adviceBindings) throws Throwable {
// when called from a before advice, but be a no-op
AroundClosure ac = arcs == null ? arc : arcs.get(arcIndex.get());
if (ac == null) {
return null;
} else {
// Based on the bit flags in the AroundClosure we can determine what to
// expect in the adviceBindings array. We may or may not be expecting
// the first value to be a new this or a new target... (see pr126167)
int flags = ac.getFlags();
boolean unset = (flags & 0x100000) != 0;
boolean thisTargetTheSame = (flags & 0x010000) != 0;
boolean hasThis = (flags & 0x001000) != 0;
boolean bindsThis = (flags & 0x000100) != 0;
boolean hasTarget = (flags & 0x000010) != 0;
boolean bindsTarget = (flags & 0x000001) != 0;
// state is always consistent with caller?,callee?,formals...,jp
Object[] state = ac.getState();
// these next two numbers can differ because some join points have a this and
// target that are the same (eg. call) - and yet you can bind this and target
// separately.
// In the state array, [0] may be this, [1] may be target
int firstArgumentIndexIntoAdviceBindings = 0;
int firstArgumentIndexIntoState = 0;
firstArgumentIndexIntoState += (hasThis ? 1 : 0);
firstArgumentIndexIntoState += (hasTarget && !thisTargetTheSame ? 1 : 0);
if (hasThis) {
if (bindsThis) {
// replace [0] (this)
firstArgumentIndexIntoAdviceBindings = 1;
state[0] = adviceBindings[0];
} else {
// leave state[0] alone, its OK
}
}
if (hasTarget) {
if (bindsTarget) {
if (thisTargetTheSame) {
// this and target are the same so replace state[0]
firstArgumentIndexIntoAdviceBindings = 1 + (bindsThis ? 1 : 0);
state[0] = adviceBindings[(bindsThis ? 1 : 0)];
} else {
// need to replace the target, and it is different to this, whether
// that means replacing state[0] or state[1] depends on whether
// the join point has a this
// This previous variant doesn't seem to cope with only binding target at a joinpoint
// which has both this and target. It forces you to supply this even if you didn't bind
// it.
// firstArgumentIndexIntoAdviceBindings = (hasThis ? 1 : 0) + 1;
// state[hasThis ? 1 : 0] = adviceBindings[hasThis ? 1 : 0];
int targetPositionInAdviceBindings = (hasThis && bindsThis) ? 1 : 0;
firstArgumentIndexIntoAdviceBindings = ((hasThis&&bindsThis)?1:0)+((hasTarget&&bindsTarget&&!thisTargetTheSame)?1:0);
state[hasThis ? 1 : 0] = adviceBindings[targetPositionInAdviceBindings];
}
} else {
// leave state[0]/state[1] alone, they are OK
}
}
// copy the rest across
for (int i = firstArgumentIndexIntoAdviceBindings; i < adviceBindings.length; i++) {
state[firstArgumentIndexIntoState + (i - firstArgumentIndexIntoAdviceBindings)] = adviceBindings[i];
}
// old code that did this, didnt allow this/target overriding
// for (int i = state.length-2; i >= 0; i--) {
// int formalIndex = (adviceBindings.length - 1) - (state.length-2) + i;
// if (formalIndex >= 0 && formalIndex < adviceBindings.length) {
// state[i] = adviceBindings[formalIndex];
// }
// }
return ac.run(state);
}
}
}