Package org.aspectj.weaver.reflect

Source Code of org.aspectj.weaver.reflect.StandardShadow

/* *******************************************************************
* Copyright (c) 2005 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://eclipse.org/legal/epl-v10.html
* Contributors:
*   Adrian Colyer      Initial implementation
* ******************************************************************/
package org.aspectj.weaver.reflect;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Map;

import org.aspectj.bridge.ISourceLocation;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.ResolvedMember;
import org.aspectj.weaver.ResolvedMemberImpl;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Var;
import org.aspectj.weaver.tools.MatchingContext;

/**
* @author colyer
*
*/
public class StandardShadow extends Shadow {

  private final World world;
  private final ResolvedType enclosingType;
  private final ResolvedMember enclosingMember;
  private final MatchingContext matchContext;
  private Var thisVar = null;
  private Var targetVar = null;
  private Var[] argsVars = null;
  private Var atThisVar = null;
  private Var atTargetVar = null;
  private Map atArgsVars = new HashMap();
  private Map withinAnnotationVar = new HashMap();
  private Map withinCodeAnnotationVar = new HashMap();
  private Map annotationVar = new HashMap();
  private AnnotationFinder annotationFinder;

  public static Shadow makeExecutionShadow(World inWorld, java.lang.reflect.Member forMethod, MatchingContext withContext) {
    Kind kind = (forMethod instanceof Method) ? Shadow.MethodExecution : Shadow.ConstructorExecution;
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(forMethod, inWorld);
    ResolvedType enclosingType = signature.getDeclaringType().resolve(inWorld);
    return new StandardShadow(inWorld, kind, signature, null, enclosingType, null, withContext);
  }

  public static Shadow makeExecutionShadow(World inWorld, ResolvedMember forMethod, MatchingContext withContext) {
    Kind kind = forMethod.getName().equals("<init>") ? Shadow.ConstructorExecution : Shadow.MethodExecution;
    // Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(forMethod, inWorld);
    // ResolvedType enclosingType = signature.getDeclaringType().resolve(inWorld);
    return new StandardShadow(inWorld, kind, forMethod, null, (ResolvedType) forMethod.getDeclaringType(), null, withContext);
  }

  public static Shadow makeAdviceExecutionShadow(World inWorld, java.lang.reflect.Method forMethod, MatchingContext withContext) {
    Kind kind = Shadow.AdviceExecution;
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedAdviceMember(forMethod, inWorld);
    ResolvedType enclosingType = signature.getDeclaringType().resolve(inWorld);
    return new StandardShadow(inWorld, kind, signature, null, enclosingType, null, withContext);
  }

  public static Shadow makeCallShadow(World inWorld, ResolvedMember aMember, ResolvedMember withinCode,
      MatchingContext withContext) {
    Shadow enclosingShadow = makeExecutionShadow(inWorld, withinCode, withContext);
    // Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(aMember, inWorld);
    // ResolvedMember enclosingMember = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(withinCode, inWorld);
    // ResolvedType enclosingType = enclosingMember.getDeclaringType().resolve(inWorld);
    Kind kind = !aMember.getName().equals("<init>") ? Shadow.MethodCall : Shadow.ConstructorCall;
    return new StandardShadow(inWorld, kind, aMember, enclosingShadow, (ResolvedType) withinCode.getDeclaringType(),
        withinCode, withContext);
  }

  public static Shadow makeCallShadow(World inWorld, java.lang.reflect.Member aMember, Class thisClass,
      MatchingContext withContext) {
    Shadow enclosingShadow = makeStaticInitializationShadow(inWorld, thisClass, withContext);
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(aMember, inWorld);
    ResolvedMember enclosingMember = ReflectionBasedReferenceTypeDelegateFactory.createStaticInitMember(thisClass, inWorld);
    ResolvedType enclosingType = enclosingMember.getDeclaringType().resolve(inWorld);
    Kind kind = aMember instanceof Method ? Shadow.MethodCall : Shadow.ConstructorCall;
    return new StandardShadow(inWorld, kind, signature, enclosingShadow, enclosingType, enclosingMember, withContext);
  }

  public static Shadow makeStaticInitializationShadow(World inWorld, Class forType, MatchingContext withContext) {
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createStaticInitMember(forType, inWorld);
    ResolvedType enclosingType = signature.getDeclaringType().resolve(inWorld);
    Kind kind = Shadow.StaticInitialization;
    return new StandardShadow(inWorld, kind, signature, null, enclosingType, null, withContext);
  }

  public static Shadow makeStaticInitializationShadow(World inWorld, ResolvedType forType, MatchingContext withContext) {
    ResolvedMember[] members = forType.getDeclaredMethods();
    int clinit = -1;
    for (int i = 0; i < members.length && clinit == -1; i++) {
      if (members[i].getName().equals("<clinit>")) {
        clinit = i;
      }
    }
    // Member signature = ReflectionBasedReferenceTypeDelegateFactory.createStaticInitMember(forType, inWorld);
    Kind kind = Shadow.StaticInitialization;
    if (clinit == -1) {
      Member clinitMember = new ResolvedMemberImpl(org.aspectj.weaver.Member.STATIC_INITIALIZATION, forType, Modifier.STATIC,
          UnresolvedType.VOID, "<clinit>", new UnresolvedType[0], new UnresolvedType[0]);
      return new StandardShadow(inWorld, kind, clinitMember, null, forType, null, withContext);
    } else {
      return new StandardShadow(inWorld, kind, members[clinit], null, forType, null, withContext);
    }
  }

  public static Shadow makePreInitializationShadow(World inWorld, Constructor forConstructor, MatchingContext withContext) {
    Kind kind = Shadow.PreInitialization;
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(forConstructor, inWorld);
    ResolvedType enclosingType = signature.getDeclaringType().resolve(inWorld);
    return new StandardShadow(inWorld, kind, signature, null, enclosingType, null, withContext);
  }

  public static Shadow makeInitializationShadow(World inWorld, Constructor forConstructor, MatchingContext withContext) {
    Kind kind = Shadow.Initialization;
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(forConstructor, inWorld);
    ResolvedType enclosingType = signature.getDeclaringType().resolve(inWorld);
    return new StandardShadow(inWorld, kind, signature, null, enclosingType, null, withContext);
  }

  public static Shadow makeHandlerShadow(World inWorld, Class exceptionType, Class withinType, MatchingContext withContext) {
    Kind kind = Shadow.ExceptionHandler;
    Shadow enclosingShadow = makeStaticInitializationShadow(inWorld, withinType, withContext);
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createHandlerMember(exceptionType, withinType, inWorld);
    ResolvedMember enclosingMember = ReflectionBasedReferenceTypeDelegateFactory.createStaticInitMember(withinType, inWorld);
    ResolvedType enclosingType = enclosingMember.getDeclaringType().resolve(inWorld);
    return new StandardShadow(inWorld, kind, signature, enclosingShadow, enclosingType, enclosingMember, withContext);
  }

  public static Shadow makeHandlerShadow(World inWorld, Class exceptionType, java.lang.reflect.Member withinCode,
      MatchingContext withContext) {
    Kind kind = Shadow.ExceptionHandler;
    Shadow enclosingShadow = makeExecutionShadow(inWorld, withinCode, withContext);
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createHandlerMember(exceptionType,
        withinCode.getDeclaringClass(), inWorld);
    ResolvedMember enclosingMember = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(withinCode, inWorld);
    ResolvedType enclosingType = enclosingMember.getDeclaringType().resolve(inWorld);
    return new StandardShadow(inWorld, kind, signature, enclosingShadow, enclosingType, enclosingMember, withContext);
  }

  public static Shadow makeFieldGetShadow(World inWorld, Field forField, Class callerType, MatchingContext withContext) {
    Shadow enclosingShadow = makeStaticInitializationShadow(inWorld, callerType, withContext);
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedField(forField, inWorld);
    ResolvedMember enclosingMember = ReflectionBasedReferenceTypeDelegateFactory.createStaticInitMember(callerType, inWorld);
    ResolvedType enclosingType = enclosingMember.getDeclaringType().resolve(inWorld);
    Kind kind = Shadow.FieldGet;
    return new StandardShadow(inWorld, kind, signature, enclosingShadow, enclosingType, enclosingMember, withContext);
  }

  public static Shadow makeFieldGetShadow(World inWorld, Field forField, java.lang.reflect.Member inMember,
      MatchingContext withContext) {
    Shadow enclosingShadow = makeExecutionShadow(inWorld, inMember, withContext);
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedField(forField, inWorld);
    ResolvedMember enclosingMember = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(inMember, inWorld);
    ResolvedType enclosingType = enclosingMember.getDeclaringType().resolve(inWorld);
    Kind kind = Shadow.FieldGet;
    return new StandardShadow(inWorld, kind, signature, enclosingShadow, enclosingType, enclosingMember, withContext);
  }

  public static Shadow makeFieldSetShadow(World inWorld, Field forField, Class callerType, MatchingContext withContext) {
    Shadow enclosingShadow = makeStaticInitializationShadow(inWorld, callerType, withContext);
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedField(forField, inWorld);
    ResolvedMember enclosingMember = ReflectionBasedReferenceTypeDelegateFactory.createStaticInitMember(callerType, inWorld);
    ResolvedType enclosingType = enclosingMember.getDeclaringType().resolve(inWorld);
    Kind kind = Shadow.FieldSet;
    return new StandardShadow(inWorld, kind, signature, enclosingShadow, enclosingType, enclosingMember, withContext);
  }

  public static Shadow makeFieldSetShadow(World inWorld, Field forField, java.lang.reflect.Member inMember,
      MatchingContext withContext) {
    Shadow enclosingShadow = makeExecutionShadow(inWorld, inMember, withContext);
    Member signature = ReflectionBasedReferenceTypeDelegateFactory.createResolvedField(forField, inWorld);
    ResolvedMember enclosingMember = ReflectionBasedReferenceTypeDelegateFactory.createResolvedMember(inMember, inWorld);
    ResolvedType enclosingType = enclosingMember.getDeclaringType().resolve(inWorld);
    Kind kind = Shadow.FieldSet;
    return new StandardShadow(inWorld, kind, signature, enclosingShadow, enclosingType, enclosingMember, withContext);
  }

  public StandardShadow(World world, Kind kind, Member signature, Shadow enclosingShadow, ResolvedType enclosingType,
      ResolvedMember enclosingMember, MatchingContext withContext) {
    super(kind, signature, enclosingShadow);
    this.world = world;
    this.enclosingType = enclosingType;
    this.enclosingMember = enclosingMember;
    this.matchContext = withContext;
    if (world instanceof IReflectionWorld) {
      this.annotationFinder = ((IReflectionWorld) world).getAnnotationFinder();
    }
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getIWorld()
   */
  public World getIWorld() {
    return world;
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getThisVar()
   */
  public Var getThisVar() {
    if (thisVar == null && hasThis()) {
      thisVar = ReflectionVar.createThisVar(getThisType().resolve(world), this.annotationFinder);
    }
    return thisVar;
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getTargetVar()
   */
  public Var getTargetVar() {
    if (targetVar == null && hasTarget()) {
      targetVar = ReflectionVar.createTargetVar(getThisType().resolve(world), this.annotationFinder);
    }
    return targetVar;
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getEnclosingType()
   */
  public UnresolvedType getEnclosingType() {
    return this.enclosingType;
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getArgVar(int)
   */
  public Var getArgVar(int i) {
    if (argsVars == null) {
      this.argsVars = new Var[this.getArgCount()];
      for (int j = 0; j < this.argsVars.length; j++) {
        this.argsVars[j] = ReflectionVar.createArgsVar(getArgType(j).resolve(world), j, this.annotationFinder);
      }
    }
    if (i < argsVars.length) {
      return argsVars[i];
    } else {
      return null;
    }
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getThisJoinPointVar()
   */
  public Var getThisJoinPointVar() {
    // TODO Auto-generated method stub
    return null;
  }

  public Var getThisJoinPointStaticPartVar() {
    return null;
  }

  public Var getThisEnclosingJoinPointStaticPartVar() {
    return null;
  }

  public Var getThisAspectInstanceVar(ResolvedType aspectType) {
    return null;
  }

  public Var getKindedAnnotationVar(UnresolvedType forAnnotationType) {
    ResolvedType annType = forAnnotationType.resolve(world);
    if (annotationVar.get(annType) == null) {
      Var v = ReflectionVar.createAtAnnotationVar(annType, this.annotationFinder);
      annotationVar.put(annType, v);
    }
    return (Var) annotationVar.get(annType);
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getWithinAnnotationVar(org.aspectj.weaver.UnresolvedType)
   */
  public Var getWithinAnnotationVar(UnresolvedType forAnnotationType) {
    ResolvedType annType = forAnnotationType.resolve(world);
    if (withinAnnotationVar.get(annType) == null) {
      Var v = ReflectionVar.createWithinAnnotationVar(annType, this.annotationFinder);
      withinAnnotationVar.put(annType, v);
    }
    return (Var) withinAnnotationVar.get(annType);
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getWithinCodeAnnotationVar(org.aspectj.weaver.UnresolvedType)
   */
  public Var getWithinCodeAnnotationVar(UnresolvedType forAnnotationType) {
    ResolvedType annType = forAnnotationType.resolve(world);
    if (withinCodeAnnotationVar.get(annType) == null) {
      Var v = ReflectionVar.createWithinCodeAnnotationVar(annType, this.annotationFinder);
      withinCodeAnnotationVar.put(annType, v);
    }
    return (Var) withinCodeAnnotationVar.get(annType);
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getThisAnnotationVar(org.aspectj.weaver.UnresolvedType)
   */
  public Var getThisAnnotationVar(UnresolvedType forAnnotationType) {
    if (atThisVar == null) {
      atThisVar = ReflectionVar.createThisAnnotationVar(forAnnotationType.resolve(world), this.annotationFinder);
    }
    return atThisVar;
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getTargetAnnotationVar(org.aspectj.weaver.UnresolvedType)
   */
  public Var getTargetAnnotationVar(UnresolvedType forAnnotationType) {
    if (atTargetVar == null) {
      atTargetVar = ReflectionVar.createTargetAnnotationVar(forAnnotationType.resolve(world), this.annotationFinder);
    }
    return atTargetVar;
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getArgAnnotationVar(int, org.aspectj.weaver.UnresolvedType)
   */
  public Var getArgAnnotationVar(int i, UnresolvedType forAnnotationType) {
    ResolvedType annType = forAnnotationType.resolve(world);
    if (atArgsVars.get(annType) == null) {
      Var[] vars = new Var[getArgCount()];
      atArgsVars.put(annType, vars);
    }
    Var[] vars = (Var[]) atArgsVars.get(annType);
    if (i > (vars.length - 1))
      return null;
    if (vars[i] == null) {
      vars[i] = ReflectionVar.createArgsAnnotationVar(annType, i, this.annotationFinder);
    }
    return vars[i];
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getEnclosingCodeSignature()
   */
  public Member getEnclosingCodeSignature() {
    // XXX this code is copied from BcelShadow with one minor change...
    if (getKind().isEnclosingKind()) {
      return getSignature();
    } else if (getKind() == Shadow.PreInitialization) {
      // PreInit doesn't enclose code but its signature
      // is correctly the signature of the ctor.
      return getSignature();
    } else if (enclosingShadow == null) {
      return this.enclosingMember;
    } else {
      return enclosingShadow.getSignature();
    }
  }

  /*
   * (non-Javadoc)
   *
   * @see org.aspectj.weaver.Shadow#getSourceLocation()
   */
  public ISourceLocation getSourceLocation() {
    return null;
  }

  public MatchingContext getMatchingContext() {
    return this.matchContext;
  }
}
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