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- /* *******************************************************************
- * 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<AroundClosure> arcs = null;
- private final ThreadLocal<Integer> 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) {
- int newIndex = arcIndex.get() - 1;
- if (newIndex > -1)
- arcIndex.set(newIndex);
- else
- arcIndex.remove();
- }
- 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);
- }
- }
-
- }
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