Examples of org.aspectj.apache.bcel.generic.InstructionList

org.aspectj.apache.bcel.generic.InstructionList
This class is a container for a list of Instruction objects. Instructions can be appended, inserted, moved, deleted, etc.. Instructions are being wrapped into InstructionHandles objects that are returned upon append/insert operations. They give the user (read only) access to the list structure, such that it can be traversed and manipulated in a controlled way. A list is finally dumped to a byte code array with getByteCode. @version $Id: InstructionList.java,v 1.10 2009/10/05 17:35:36 aclement Exp $ @author M. Dahm @author Abraham Nevado @see Instruction @see InstructionHandle @see BranchHandle

  // call to the constructor. If ANY advice gets put on it, we move
  // the NEW instruction inside the join point, which involves putting
  // all the arguments in temps.
  public static BcelShadow makeConstructorCall(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle callHandle,
      BcelShadow enclosingShadow) {
    final InstructionList body = enclosingMethod.getBody();


    Member sig = world.makeJoinPointSignatureForMethodInvocation(enclosingMethod.getEnclosingClass(),
        (InvokeInstruction) callHandle.getInstruction());


    BcelShadow s = new BcelShadow(world, ConstructorCall, sig, enclosingMethod, enclosingShadow);

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    return s;
  }


  public static BcelShadow makeArrayConstructorCall(BcelWorld world, LazyMethodGen enclosingMethod,
      InstructionHandle arrayInstruction, BcelShadow enclosingShadow) {
    final InstructionList body = enclosingMethod.getBody();
    Member sig = world.makeJoinPointSignatureForArrayConstruction(enclosingMethod.getEnclosingClass(), arrayInstruction);
    BcelShadow s = new BcelShadow(world, ConstructorCall, sig, enclosingMethod, enclosingShadow);
    ShadowRange r = new ShadowRange(body);
    r.associateWithShadow(s);
    r.associateWithTargets(Range.genStart(body, arrayInstruction), Range.genEnd(body, arrayInstruction));

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    return s;
  }


  public static BcelShadow makeMonitorEnter(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle monitorInstruction,
      BcelShadow enclosingShadow) {
    final InstructionList body = enclosingMethod.getBody();
    Member sig = world.makeJoinPointSignatureForMonitorEnter(enclosingMethod.getEnclosingClass(), monitorInstruction);
    BcelShadow s = new BcelShadow(world, SynchronizationLock, sig, enclosingMethod, enclosingShadow);
    ShadowRange r = new ShadowRange(body);
    r.associateWithShadow(s);
    r.associateWithTargets(Range.genStart(body, monitorInstruction), Range.genEnd(body, monitorInstruction));

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    return s;
  }


  public static BcelShadow makeMonitorExit(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle monitorInstruction,
      BcelShadow enclosingShadow) {
    final InstructionList body = enclosingMethod.getBody();
    Member sig = world.makeJoinPointSignatureForMonitorExit(enclosingMethod.getEnclosingClass(), monitorInstruction);
    BcelShadow s = new BcelShadow(world, SynchronizationUnlock, sig, enclosingMethod, enclosingShadow);
    ShadowRange r = new ShadowRange(body);
    r.associateWithShadow(s);
    r.associateWithTargets(Range.genStart(body, monitorInstruction), Range.genEnd(body, monitorInstruction));

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  // return s;
  // }


  public static BcelShadow makeMethodCall(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle callHandle,
      BcelShadow enclosingShadow) {
    final InstructionList body = enclosingMethod.getBody();
    BcelShadow s = new BcelShadow(world, MethodCall, world.makeJoinPointSignatureForMethodInvocation(enclosingMethod
        .getEnclosingClass(), (InvokeInstruction) callHandle.getInstruction()), enclosingMethod, enclosingShadow);
    ShadowRange r = new ShadowRange(body);
    r.associateWithShadow(s);
    r.associateWithTargets(Range.genStart(body, callHandle), Range.genEnd(body, callHandle));

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    return s;
  }


  public static BcelShadow makeShadowForMethodCall(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle callHandle,
      BcelShadow enclosingShadow, Kind kind, ResolvedMember sig) {
    final InstructionList body = enclosingMethod.getBody();
    BcelShadow s = new BcelShadow(world, kind, sig, enclosingMethod, enclosingShadow);
    ShadowRange r = new ShadowRange(body);
    r.associateWithShadow(s);
    r.associateWithTargets(Range.genStart(body, callHandle), Range.genEnd(body, callHandle));
    retargetAllBranches(callHandle, r.getStart());

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    return s;
  }


  public static BcelShadow makeFieldGet(BcelWorld world, ResolvedMember field, LazyMethodGen enclosingMethod,
      InstructionHandle getHandle, BcelShadow enclosingShadow) {
    final InstructionList body = enclosingMethod.getBody();
    BcelShadow s = new BcelShadow(world, FieldGet, field,
    // BcelWorld.makeFieldSignature(
        // enclosingMethod.getEnclosingClass(),
        // (FieldInstruction) getHandle.getInstruction()),
        enclosingMethod, enclosingShadow);

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    return s;
  }


  public static BcelShadow makeFieldSet(BcelWorld world, ResolvedMember field, LazyMethodGen enclosingMethod,
      InstructionHandle setHandle, BcelShadow enclosingShadow) {
    final InstructionList body = enclosingMethod.getBody();
    BcelShadow s = new BcelShadow(world, FieldSet, field,
    // BcelWorld.makeFieldJoinPointSignature(
        // enclosingMethod.getEnclosingClass(),
        // (FieldInstruction) setHandle.getInstruction()),
        enclosingMethod, enclosingShadow);

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      if (lazyTjpConsumers == 1) {
        return; // special case only one lazyTjpUser
      }


      InstructionFactory fact = getFactory();
      InstructionList il = new InstructionList();
      il.append(InstructionConstants.ACONST_NULL);
      il.append(thisJoinPointVar.createStore(fact));
      range.insert(il, Range.OutsideBefore);
    } else {
      appliedLazyTjpOptimization = false;
      InstructionFactory fact = getFactory();
      InstructionList il = createThisJoinPoint();
      il.append(thisJoinPointVar.createStore(fact));
      range.insert(il, Range.OutsideBefore);
    }
  }

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    return true;
  }


  InstructionList loadThisJoinPoint() {
    InstructionFactory fact = getFactory();
    InstructionList il = new InstructionList();


    if (isThisJoinPointLazy) {
      // If we're lazy, build the join point right here.
      il.append(createThisJoinPoint());


      // Does someone else need it? If so, store it for later retrieval
      if (lazyTjpConsumers > 1) {
        il.append(thisJoinPointVar.createStore(fact));


        InstructionHandle end = il.append(thisJoinPointVar.createLoad(fact));


        il.insert(InstructionFactory.createBranchInstruction(Constants.IFNONNULL, end));
        il.insert(thisJoinPointVar.createLoad(fact));
      }
    } else {
      // If not lazy, its already been built and stored, just retrieve it
      thisJoinPointVar.appendLoad(il, fact);
    }

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