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

org.aspectj.apache.bcel.generic.InstructionBranch
Abstract super class for branching instructions like GOTO, IFEQ, etc.. Branch instructions may have a variable length, namely GOTO, JSR, LOOKUPSWITCH and TABLESWITCH. A branch instruction may be talking in terms of absolute destination (targetIndex) or about an instruction it doesnt yet know the position if (targetInstruction). targetInstruction (if set) overrides targetIndex @see InstructionList @version $Id: InstructionBranch.java,v 1.6 2009/10/05 17:35:36 aclement Exp $ @author M. Dahm

    InstructionHandle tryStart = il.append(InstructionConstants.ALOAD_0);


    il.append(Utility.createInvoke(factory, Constants.INVOKESTATIC, AjcMemberMaker.perTypeWithinGetInstance(aspectType)));
    il.append(InstructionConstants.ASTORE_1);
    il.append(InstructionConstants.ALOAD_1);
    InstructionBranch ifNonNull = InstructionFactory.createBranchInstruction(Constants.IFNONNULL, null);
    il.append(ifNonNull);
    il.append(factory.createNew(AjcMemberMaker.NO_ASPECT_BOUND_EXCEPTION.getName()));
    il.append(InstructionConstants.DUP);
    il.append(InstructionFactory.PUSH(classGen.getConstantPool(), aspectType.getName()));
    il.append(InstructionConstants.ACONST_NULL);
    il.append(factory.createInvoke(AjcMemberMaker.NO_ASPECT_BOUND_EXCEPTION.getName(), "<init>", Type.VOID, new Type[] {
        Type.STRING, new ObjectType("java.lang.Throwable") }, Constants.INVOKESPECIAL));
    il.append(InstructionConstants.ATHROW);
    InstructionHandle ifElse = il.append(InstructionConstants.ALOAD_1);
    ifNonNull.setTarget(ifElse);
    il.append(InstructionFactory.createReturn(Type.OBJECT));


    InstructionHandle handler = il.append(InstructionConstants.ASTORE_1);
    il.append(factory.createNew(AjcMemberMaker.NO_ASPECT_BOUND_EXCEPTION.getName()));
    il.append(InstructionConstants.DUP);

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    classGen.addMethodGen(method);


    InstructionList il = method.getBody();
    InstructionHandle tryStart = il.append(InstructionConstants.ALOAD_0);
    il.append(Utility.createInvoke(factory, Constants.INVOKESTATIC, AjcMemberMaker.perTypeWithinGetInstance(aspectType)));
    InstructionBranch ifNull = InstructionFactory.createBranchInstruction(Constants.IFNULL, null);
    il.append(ifNull);
    il.append(InstructionConstants.ICONST_1);
    il.append(InstructionConstants.IRETURN);
    InstructionHandle ifElse = il.append(InstructionConstants.ICONST_0);
    ifNull.setTarget(ifElse);
    il.append(InstructionConstants.IRETURN);


    InstructionHandle handler = il.append(InstructionConstants.ASTORE_1);
    il.append(InstructionConstants.ICONST_0);
    il.append(InstructionConstants.IRETURN);

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    }
  }


  private void handleBranchInstruction(Map<InstructionHandle, InstructionHandle> map, Instruction oldInstruction,
      Instruction newInstruction) {
    InstructionBranch oldBranchInstruction = (InstructionBranch) oldInstruction;
    InstructionBranch newBranchInstruction = (InstructionBranch) newInstruction;
    InstructionHandle oldTarget = oldBranchInstruction.getTarget(); // old
    // target


    // New target is in hash map
    newBranchInstruction.setTarget(remap(oldTarget, map));


    if (oldBranchInstruction instanceof InstructionSelect) {
      // Either LOOKUPSWITCH or TABLESWITCH
      InstructionHandle[] oldTargets = ((InstructionSelect) oldBranchInstruction).getTargets();
      InstructionHandle[] newTargets = ((InstructionSelect) newBranchInstruction).getTargets();

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  /**
   * Process a branch instruction with respect to instructions that are about to be deleted. If the target for the branch is a
   * candidate for deletion, move it to the next valid instruction after the deleted target.
   */
  private void handleBranchInstruction(BranchHandle branchHandle, Set<InstructionHandle> handlesForDeletion) {
    InstructionBranch branchInstruction = (InstructionBranch) branchHandle.getInstruction();
    InstructionHandle target = branchInstruction.getTarget(); // old target


    if (handlesForDeletion.contains(target)) {
      do {
        target = target.getNext();
      } while (handlesForDeletion.contains(target));
      branchInstruction.setTarget(target);
    }


    if (branchInstruction instanceof InstructionSelect) {
      // Either LOOKUPSWITCH or TABLESWITCH
      InstructionSelect iSelect = (InstructionSelect) branchInstruction;

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        if (((ExceptionRange) r).getHandler() == target) {
          return;
        }
      }
    } else if (targeter instanceof InstructionBranch) {
      InstructionBranch bi = (InstructionBranch) targeter;
      if (bi.getTarget() == target) {
        return;
      }
      if (targeter instanceof InstructionSelect) {
        InstructionSelect sel = (InstructionSelect) targeter;
        InstructionHandle[] itargets = sel.getTargets();

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        printLabel(null, depth);
        out.print("  ");
        out.print("default: \t");
        out.print(labelMap.get(defaultTarget));
      } else if (inst instanceof InstructionBranch) {
        InstructionBranch brinst = (InstructionBranch) inst;
        out.print(Constants.OPCODE_NAMES[brinst.getOpcode()].toUpperCase());
        out.print(" ");
        out.print(labelMap.get(brinst.getTarget()));
      } else if (inst.isLocalVariableInstruction()) {
        // LocalVariableInstruction lvinst = (LocalVariableInstruction)
        // inst;
        out.print(inst.toString(false).toUpperCase());
        int index = inst.getIndex();

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    }
  }


  private void handleBranchInstruction(Map<InstructionHandle, InstructionHandle> map, Instruction oldInstruction,
      Instruction newInstruction) {
    InstructionBranch oldBranchInstruction = (InstructionBranch) oldInstruction;
    InstructionBranch newBranchInstruction = (InstructionBranch) newInstruction;
    InstructionHandle oldTarget = oldBranchInstruction.getTarget(); // old
    // target


    // New target is in hash map
    newBranchInstruction.setTarget(remap(oldTarget, map));


    if (oldBranchInstruction instanceof InstructionSelect) {
      // Either LOOKUPSWITCH or TABLESWITCH
      InstructionHandle[] oldTargets = ((InstructionSelect) oldBranchInstruction).getTargets();
      InstructionHandle[] newTargets = ((InstructionSelect) newBranchInstruction).getTargets();

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  /**
   * Process a branch instruction with respect to instructions that are about to be deleted. If the target for the branch is a
   * candidate for deletion, move it to the next valid instruction after the deleted target.
   */
  private void handleBranchInstruction(BranchHandle branchHandle, Set<InstructionHandle> handlesForDeletion) {
    InstructionBranch branchInstruction = (InstructionBranch) branchHandle.getInstruction();
    InstructionHandle target = branchInstruction.getTarget(); // old target


    if (handlesForDeletion.contains(target)) {
      do {
        target = target.getNext();
      } while (handlesForDeletion.contains(target));
      branchInstruction.setTarget(target);
    }


    if (branchInstruction instanceof InstructionSelect) {
      // Either LOOKUPSWITCH or TABLESWITCH
      InstructionSelect iSelect = (InstructionSelect) branchInstruction;

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        if (((ExceptionRange) r).getHandler() == target) {
          return;
        }
      }
    } else if (targeter instanceof InstructionBranch) {
      InstructionBranch bi = (InstructionBranch) targeter;
      if (bi.getTarget() == target) {
        return;
      }
      if (targeter instanceof InstructionSelect) {
        InstructionSelect sel = (InstructionSelect) targeter;
        InstructionHandle[] itargets = sel.getTargets();

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        printLabel(null, depth);
        out.print("  ");
        out.print("default: \t");
        out.print(labelMap.get(defaultTarget));
      } else if (inst instanceof InstructionBranch) {
        InstructionBranch brinst = (InstructionBranch) inst;
        out.print(Constants.OPCODE_NAMES[brinst.getOpcode()].toUpperCase());
        out.print(" ");
        out.print(labelMap.get(brinst.getTarget()));
      } else if (inst.isLocalVariableInstruction()) {
        // LocalVariableInstruction lvinst = (LocalVariableInstruction)
        // inst;
        out.print(inst.toString(false).toUpperCase());
        int index = inst.getIndex();

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