Java 类org.apache.bcel.generic.CPInstruction 实例源码

public boolean checkCode(InstructionHandle[] match)
{
    InstructionHandle ih = match[0];
    CPInstruction ldc_w = (CPInstruction) ih.getInstruction();
    Constant cc = cpool.getConstant(ldc_w.getIndex());
    if (cc.getTag() != CONSTANT_Class)
        return false;

    ih = match[1];
    CPInstruction invokevirtual = (CPInstruction) ih.getInstruction();
    ConstantMethodref cm = (ConstantMethodref) cpool.getConstant(invokevirtual.getIndex());
    ConstantNameAndType cnt = (ConstantNameAndType) cpool.getConstant(cm.getNameAndTypeIndex());
    if (!cnt.getName(cpool.getConstantPool()).equals("desiredAssertionStatus"))
        return false;
    return true;
}

public void visitCPInstruction(CPInstruction cpi)
{
   int index = cpi.getIndex();
   Constant oldConstant = oldCP.getConstant(index);
   if (oldConstant instanceof org.apache.bcel.classfile.ConstantCP)
   {
      org.apache.bcel.classfile.ConstantCP fr = (org.apache.bcel.classfile.ConstantCP) oldConstant;
      if (fr.getClass(oldCP.getConstantPool()).equals(oldClass))
         fr.setClassIndex(oldCP.addClass(newClass));
   }
   index = newCP.addConstant(oldConstant, oldCP);
   cpi.setIndex(index);
}

public boolean checkCode(InstructionHandle[] match)
{
    InstructionHandle ih = match[2];
    CPInstruction putfield = (CPInstruction) ih.getInstruction();
    Constant cc = cpool.getConstant(putfield.getIndex());
    if (cc.getTag() != CONSTANT_Fieldref)
        return false;
    ConstantFieldref cfield = (ConstantFieldref) cc;
    ConstantNameAndType cnt = (ConstantNameAndType) cpool.getConstant(cfield.getNameAndTypeIndex());
    if (!cnt.getName(cpool.getConstantPool()).equals("this$0"))
        return false;
    return true;
}

public void visitAllocationInstruction( AllocationInstruction i ) {
    Type type;
    if (i instanceof CPInstruction) {
        type = ((CPInstruction) i).getType(_cp);
    } else {
        type = ((NEWARRAY) i).getType();
    }
    short opcode = ((Instruction) i).getOpcode();
    int dim = 1;
    switch (opcode) {
        case Constants.NEW:
            _out.println("il.append(_factory.createNew(\"" + ((ObjectType) type).getClassName()
                    + "\"));");
            break;
        case Constants.MULTIANEWARRAY:
            dim = ((MULTIANEWARRAY) i).getDimensions();
        case Constants.ANEWARRAY:
        case Constants.NEWARRAY:
            if (type instanceof ArrayType) {
                type = ((ArrayType) type).getBasicType();
            }
            _out.println("il.append(_factory.createNewArray(" + BCELifier.printType(type)
                    + ", (short) " + dim + "));");
            break;
        default:
            throw new RuntimeException("Oops: " + opcode);
    }
}

private void emitCPInstruction(Element xml_inst, CPInstruction inst) {
    addConstant(xml_inst, inst.getIndex());
}