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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 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:
- * PARC initial implementation
- * ******************************************************************/
-
- package org.aspectj.weaver.patterns;
-
- import java.io.IOException;
- import java.util.Map;
-
- import org.aspectj.bridge.MessageUtil;
- import org.aspectj.util.FuzzyBoolean;
- import org.aspectj.weaver.CompressingDataOutputStream;
- import org.aspectj.weaver.ISourceContext;
- import org.aspectj.weaver.IntMap;
- import org.aspectj.weaver.ResolvedType;
- import org.aspectj.weaver.Shadow;
- import org.aspectj.weaver.UnresolvedType;
- import org.aspectj.weaver.VersionedDataInputStream;
- import org.aspectj.weaver.WeaverMessages;
- import org.aspectj.weaver.World;
- import org.aspectj.weaver.ast.Literal;
- import org.aspectj.weaver.ast.Test;
-
- /**
- * This is a kind of KindedPointcut. This belongs either in a hierarchy with it or in a new place to share code with other potential
- * future statement-level pointcuts like synchronized and throws
- */
- public class HandlerPointcut extends Pointcut {
- TypePattern exceptionType;
-
- private static final int MATCH_KINDS = Shadow.ExceptionHandler.bit;
-
- public HandlerPointcut(TypePattern exceptionType) {
- this.exceptionType = exceptionType;
- this.pointcutKind = HANDLER;
- }
-
- public int couldMatchKinds() {
- return MATCH_KINDS;
- }
-
- public FuzzyBoolean fastMatch(FastMatchInfo type) {
- // ??? should be able to do better by finding all referenced types in type
- return FuzzyBoolean.MAYBE;
- }
-
- protected FuzzyBoolean matchInternal(Shadow shadow) {
- if (shadow.getKind() != Shadow.ExceptionHandler) {
- return FuzzyBoolean.NO;
- }
-
- exceptionType.resolve(shadow.getIWorld());
-
- // we know we have exactly one parameter since we're checking an exception handler
- return exceptionType.matches(shadow.getSignature().getParameterTypes()[0].resolve(shadow.getIWorld()), TypePattern.STATIC);
- }
-
- public Pointcut parameterizeWith(Map typeVariableMap, World w) {
- HandlerPointcut ret = new HandlerPointcut(exceptionType.parameterizeWith(typeVariableMap, w));
- ret.copyLocationFrom(this);
- return ret;
- }
-
- public boolean equals(Object other) {
- if (!(other instanceof HandlerPointcut)) {
- return false;
- }
- HandlerPointcut o = (HandlerPointcut) other;
- return o.exceptionType.equals(this.exceptionType);
- }
-
- public int hashCode() {
- int result = 17;
- result = 37 * result + exceptionType.hashCode();
- return result;
- }
-
- public String toString() {
- StringBuilder buf = new StringBuilder();
- buf.append("handler(");
- buf.append(exceptionType.toString());
- buf.append(")");
- return buf.toString();
- }
-
- public void write(CompressingDataOutputStream s) throws IOException {
- s.writeByte(Pointcut.HANDLER);
- exceptionType.write(s);
- writeLocation(s);
- }
-
- public static Pointcut read(VersionedDataInputStream s, ISourceContext context) throws IOException {
- HandlerPointcut ret = new HandlerPointcut(TypePattern.read(s, context));
- ret.readLocation(context, s);
- return ret;
- }
-
- // XXX note: there is no namebinding in any kinded pointcut.
- // still might want to do something for better error messages
- // We want to do something here to make sure we don't sidestep the parameter
- // list in capturing type identifiers.
- public void resolveBindings(IScope scope, Bindings bindings) {
- exceptionType = exceptionType.resolveBindings(scope, bindings, false, false);
- boolean invalidParameterization = false;
- if (exceptionType.getTypeParameters().size() > 0) {
- invalidParameterization = true;
- }
- UnresolvedType exactType = exceptionType.getExactType();
- if (exactType != null && exactType.isParameterizedType()) {
- invalidParameterization = true;
- }
- if (invalidParameterization) {
- // no parameterized or generic types for handler
- scope.message(MessageUtil.error(WeaverMessages.format(WeaverMessages.HANDLER_PCD_DOESNT_SUPPORT_PARAMETERS),
- getSourceLocation()));
- }
- // XXX add error if exact binding and not an exception
- }
-
- protected Test findResidueInternal(Shadow shadow, ExposedState state) {
- return match(shadow).alwaysTrue() ? Literal.TRUE : Literal.FALSE;
- }
-
- public Pointcut concretize1(ResolvedType inAspect, ResolvedType declaringType, IntMap bindings) {
- Pointcut ret = new HandlerPointcut(exceptionType);
- ret.copyLocationFrom(this);
- return ret;
- }
-
- public Object accept(PatternNodeVisitor visitor, Object data) {
- return visitor.visit(this, data);
- }
- }
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