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PointcutExpressionImpl.java

/* *******************************************************************
 * Copyright (c) 2004 IBM Corporation.
 * 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 
 *  
 * ******************************************************************/
package org.aspectj.weaver.internal.tools;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Method;

import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Literal;
import org.aspectj.weaver.ast.Test;
import org.aspectj.weaver.patterns.AbstractPatternNodeVisitor;
import org.aspectj.weaver.patterns.AnnotationPointcut;
import org.aspectj.weaver.patterns.ArgsAnnotationPointcut;
import org.aspectj.weaver.patterns.ArgsPointcut;
import org.aspectj.weaver.patterns.CflowPointcut;
import org.aspectj.weaver.patterns.ExposedState;
import org.aspectj.weaver.patterns.IfPointcut;
import org.aspectj.weaver.patterns.NotAnnotationTypePattern;
import org.aspectj.weaver.patterns.NotPointcut;
import org.aspectj.weaver.patterns.Pointcut;
import org.aspectj.weaver.patterns.ThisOrTargetAnnotationPointcut;
import org.aspectj.weaver.patterns.ThisOrTargetPointcut;
import org.aspectj.weaver.patterns.WithinAnnotationPointcut;
import org.aspectj.weaver.patterns.WithinCodeAnnotationPointcut;
import org.aspectj.weaver.reflect.ReflectionFastMatchInfo;
import org.aspectj.weaver.reflect.ReflectionShadow;
import org.aspectj.weaver.reflect.ShadowMatchImpl;
import org.aspectj.weaver.tools.DefaultMatchingContext;
import org.aspectj.weaver.tools.MatchingContext;
import org.aspectj.weaver.tools.PointcutExpression;
import org.aspectj.weaver.tools.PointcutParameter;
import org.aspectj.weaver.tools.ShadowMatch;

/**
 * Map from weaver.tools interface to internal Pointcut implementation...
 */
00048 public class PointcutExpressionImpl implements PointcutExpression {
      
      private World world;
      private Pointcut pointcut;
      private String expression;
      private PointcutParameter[] parameters;
      private MatchingContext matchContext = new DefaultMatchingContext();
      
      public PointcutExpressionImpl(Pointcut pointcut, String expression, PointcutParameter[] params, World inWorld) {
            this.pointcut = pointcut;
            this.expression = expression;
            this.world = inWorld;
            this.parameters = params;
            if (this.parameters == null) this.parameters = new PointcutParameter[0];
      }
      
      public Pointcut getUnderlyingPointcut() {
            return this.pointcut;
      }
      
      /* (non-Javadoc)
       * @see org.aspectj.weaver.tools.PointcutExpression#setMatchingContext(org.aspectj.weaver.tools.MatchingContext)
       */
00071       public void setMatchingContext(MatchingContext aMatchContext) {
            this.matchContext = aMatchContext;
      }
      
00075       public boolean couldMatchJoinPointsInType(Class aClass) {
            ResolvedType matchType = world.resolve(aClass.getName());
            ReflectionFastMatchInfo info = new ReflectionFastMatchInfo(matchType,null,this.matchContext);
            return pointcut.fastMatch(info).maybeTrue();
      }
      
00081       public boolean mayNeedDynamicTest() {
            HasPossibleDynamicContentVisitor visitor = new HasPossibleDynamicContentVisitor();
            pointcut.traverse(visitor, null);
            return visitor.hasDynamicContent();
      }
      
      private ExposedState getExposedState() {
            return new ExposedState(parameters.length);
      }

00091       public ShadowMatch matchesMethodExecution(Method aMethod) {
            return matchesExecution(aMethod);
      }
      
00095       public ShadowMatch matchesConstructorExecution(Constructor aConstructor) {
            return matchesExecution(aConstructor);
      }
      
      private ShadowMatch matchesExecution(Member aMember) {
            Shadow s = ReflectionShadow.makeExecutionShadow(world, aMember,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aMember);
            sm.setWithinCode(null);
            sm.setWithinType(aMember.getDeclaringClass());
            return sm;
      }
      
00108       public ShadowMatch matchesStaticInitialization(Class aClass) {
            Shadow s = ReflectionShadow.makeStaticInitializationShadow(world, aClass,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(null);
            sm.setWithinCode(null);
            sm.setWithinType(aClass);
            return sm;
      }     
      
00117       public ShadowMatch matchesAdviceExecution(Method aMethod) {
            Shadow s = ReflectionShadow.makeAdviceExecutionShadow(world, aMethod,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aMethod);
            sm.setWithinCode(null);
            sm.setWithinType(aMethod.getDeclaringClass());
            return sm;
      }
      
00126       public ShadowMatch matchesInitialization(Constructor aConstructor) {
            Shadow s = ReflectionShadow.makeInitializationShadow(world, aConstructor,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aConstructor);
            sm.setWithinCode(null);
            sm.setWithinType(aConstructor.getDeclaringClass());
            return sm;
      }
      
00135       public ShadowMatch matchesPreInitialization(Constructor aConstructor) {
            Shadow s = ReflectionShadow.makePreInitializationShadow(world, aConstructor,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aConstructor);
            sm.setWithinCode(null);
            sm.setWithinType(aConstructor.getDeclaringClass());
            return sm;
      }
      
00144       public ShadowMatch matchesMethodCall(Method aMethod, Member withinCode) {
            Shadow s = ReflectionShadow.makeCallShadow(world, aMethod, withinCode,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aMethod);
            sm.setWithinCode(withinCode);
            sm.setWithinType(withinCode.getDeclaringClass());
            return sm;
      }
      
00153       public ShadowMatch matchesMethodCall(Method aMethod, Class callerType) {
            Shadow s = ReflectionShadow.makeCallShadow(world, aMethod, callerType,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aMethod);
            sm.setWithinCode(null);
            sm.setWithinType(callerType);
            return sm;
      }
      
00162       public ShadowMatch matchesConstructorCall(Constructor aConstructor, Class callerType) {
            Shadow s = ReflectionShadow.makeCallShadow(world, aConstructor, callerType,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aConstructor);
            sm.setWithinCode(null);
            sm.setWithinType(callerType);
            return sm;
      }
      
00171       public ShadowMatch matchesConstructorCall(Constructor aConstructor, Member withinCode) {
            Shadow s = ReflectionShadow.makeCallShadow(world, aConstructor,withinCode,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aConstructor);
            sm.setWithinCode(withinCode);
            sm.setWithinType(withinCode.getDeclaringClass());
            return sm;
      }

00180       public ShadowMatch matchesHandler(Class exceptionType, Class handlingType) {
            Shadow s = ReflectionShadow.makeHandlerShadow(world,exceptionType,handlingType,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(null);
            sm.setWithinCode(null);
            sm.setWithinType(handlingType);
            return sm;
      }
      
00189       public ShadowMatch matchesHandler(Class exceptionType, Member withinCode) {
            Shadow s = ReflectionShadow.makeHandlerShadow(world,exceptionType,withinCode,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(null);
            sm.setWithinCode(withinCode);
            sm.setWithinType(withinCode.getDeclaringClass());
            return sm;
      }
      
00198       public ShadowMatch matchesFieldGet(Field aField, Class withinType) {
            Shadow s = ReflectionShadow.makeFieldGetShadow(world, aField, withinType,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aField);
            sm.setWithinCode(null);
            sm.setWithinType(withinType);
            return sm;
      }
      
00207       public ShadowMatch matchesFieldGet(Field aField, Member withinCode) {
            Shadow s = ReflectionShadow.makeFieldGetShadow(world, aField, withinCode,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aField);
            sm.setWithinCode(withinCode);
            sm.setWithinType(withinCode.getDeclaringClass());
            return sm;
      }
      
00216       public ShadowMatch matchesFieldSet(Field aField, Class withinType) {
            Shadow s = ReflectionShadow.makeFieldSetShadow(world, aField, withinType,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aField);
            sm.setWithinCode(null);
            sm.setWithinType(withinType);
            return sm;
      }
      
00225       public ShadowMatch matchesFieldSet(Field aField, Member withinCode) {
            Shadow s = ReflectionShadow.makeFieldSetShadow(world, aField, withinCode,this.matchContext);
            ShadowMatchImpl sm = getShadowMatch(s);
            sm.setSubject(aField);
            sm.setWithinCode(withinCode);
            sm.setWithinType(withinCode.getDeclaringClass());
            return sm;
      }
      
      private ShadowMatchImpl getShadowMatch(Shadow forShadow) {
            org.aspectj.util.FuzzyBoolean match = pointcut.match(forShadow);
            Test residueTest = Literal.TRUE;
            ExposedState state = getExposedState();
            if (match.maybeTrue()) {
                  residueTest = pointcut.findResidue(forShadow, state);
            }
            ShadowMatchImpl sm = new ShadowMatchImpl(match,residueTest,state,parameters);
            sm.setMatchingContext(this.matchContext);
            return sm;
      }

      /* (non-Javadoc)
       * @see org.aspectj.weaver.tools.PointcutExpression#getPointcutExpression()
       */
00249       public String getPointcutExpression() {
            return expression;
      }

      private static class HasPossibleDynamicContentVisitor extends AbstractPatternNodeVisitor {
            private boolean hasDynamicContent = false;
            
            public boolean hasDynamicContent() { return hasDynamicContent; }
            
            public Object visit(WithinAnnotationPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }
            
            public Object visit(WithinCodeAnnotationPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }
            
            public Object visit(AnnotationPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }
            
            public Object visit(ArgsAnnotationPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }
            
            public Object visit(ArgsPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }

            public Object visit(CflowPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }
            
            public Object visit(IfPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }
            
            public Object visit(NotAnnotationTypePattern node, Object data) {
                  return node.getNegatedPattern().accept(this, data);
            }
            
            public Object visit(NotPointcut node, Object data) {
                  return node.getNegatedPointcut().accept(this, data);
            }
            
            public Object visit(ThisOrTargetAnnotationPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }
            
            public Object visit(ThisOrTargetPointcut node, Object data) {
                  hasDynamicContent = true;
                  return null;
            }
            
      }
      
      public static class Handler implements Member {

            private Class decClass;
            private Class exType;
            
            public Handler(Class decClass, Class exType) {
                  this.decClass = decClass;
                  this.exType = exType;
            }
            
            public int getModifiers() {
                  return 0;
            }

            public Class getDeclaringClass() {
                  return decClass;
            }

            public String getName() {
                  return null;
            }

            public Class getHandledExceptionType() {
                  return exType;
            }

            public boolean isSynthetic() {
                  return false;
            }
      }
}

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