Package javassist.bytecode

Examples of javassist.bytecode.CodeAttribute

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          || methodName.startsWith(EACH_WRITE_METHOD_PREFIX)
          || methodName.equals(GETFIELDHANDLER_METHOD_NAME)
          || methodName.equals(SETFIELDHANDLER_METHOD_NAME)) {
        continue;
      }
      CodeAttribute codeAttr = minfo.getCodeAttribute();
      if (codeAttr == null) {
        return;
      }
      CodeIterator iter = codeAttr.iterator();
      while (iter.hasNext()) {
        try {
          int pos = iter.next();
          pos = transformInvokevirtualsIntoGetfields(classfile, iter,
                                                     pos);
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            CtMember.Cache cache = hasMemberCache();
            if (cache != null)
                cache.addConstructor(new CtConstructor(m, this));
        }
        else {
            CodeAttribute codeAttr = m.getCodeAttribute();
            if (codeAttr == null)
                throw new CannotCompileException("empty <clinit>");

            try {
                CodeIterator it = codeAttr.iterator();
                int pos = it.insertEx(code.get());
                it.insert(code.getExceptionTable(), pos);
                int maxstack = codeAttr.getMaxStack();
                if (maxstack < stacksize)
                    codeAttr.setMaxStack(stacksize);

                int maxlocals = codeAttr.getMaxLocals();
                if (maxlocals < localsize)
                    codeAttr.setMaxLocals(localsize);
            }
            catch (BadBytecode e) {
                throw new CannotCompileException(e);
            }
        }
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        List list = cf.getMethods();
        int n = list.size();
        for (int i = 0; i < n; ++i) {
            MethodInfo minfo = (MethodInfo)list.get(i);
            if (minfo.isConstructor()) {
                CodeAttribute codeAttr = minfo.getCodeAttribute();
                if (codeAttr != null)
                    try {
                        Bytecode init = new Bytecode(cp, 0,
                                                codeAttr.getMaxLocals());
                        CtClass[] params
                            = Descriptor.getParameterTypes(
                                                minfo.getDescriptor(),
                                                classPool);
                        int stacksize = makeFieldInitializer(init, params);
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    public CtClass[] mayThrow() {
        ClassPool pool = thisClass.getClassPool();
        ConstPool cp = thisMethod.getConstPool();
        LinkedList list = new LinkedList();
        try {
            CodeAttribute ca = thisMethod.getCodeAttribute();
            ExceptionTable et = ca.getExceptionTable();
            int pos = currentPos;
            int n = et.size();
            for (int i = 0; i < n; ++i)
                if (et.startPc(i) <= pos && pos < et.endPc(i)) {
                    int t = et.catchType(i);
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    }

    protected void runEditor(ExprEditor ed, CodeIterator oldIterator)
        throws CannotCompileException
    {
        CodeAttribute codeAttr = oldIterator.get();
        int orgLocals = codeAttr.getMaxLocals();
        int orgStack = codeAttr.getMaxStack();
        int newLocals = locals();
        codeAttr.setMaxStack(stack());
        codeAttr.setMaxLocals(newLocals);
        ExprEditor.LoopContext context
            = new ExprEditor.LoopContext(newLocals);
        int size = oldIterator.getCodeLength();
        int endPos = oldIterator.lookAhead();
        oldIterator.move(currentPos);
        if (ed.doit(thisClass, thisMethod, context, oldIterator, endPos))
            edited = true;

        oldIterator.move(endPos + oldIterator.getCodeLength() - size);
        codeAttr.setMaxLocals(orgLocals);
        codeAttr.setMaxStack(orgStack);
        maxLocals = context.maxLocals;
        maxStack += context.maxStack;
    }
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            m.setAccessFlags(AccessFlag.STATIC);
            m.setCodeAttribute(code.toCodeAttribute());
            cf.addMethod(m);
        }
        else {
            CodeAttribute codeAttr = m.getCodeAttribute();
            if (codeAttr == null)
                throw new CannotCompileException("empty <clinit>");

            try {
                CodeIterator it = codeAttr.iterator();
                int pos = it.insertEx(code.get());
                it.insert(code.getExceptionTable(), pos);
                int maxstack = codeAttr.getMaxStack();
                if (maxstack < stacksize)
                    codeAttr.setMaxStack(stacksize);

                int maxlocals = codeAttr.getMaxLocals();
                if (maxlocals < localsize)
                    codeAttr.setMaxLocals(localsize);
            }
            catch (BadBytecode e) {
                throw new CannotCompileException(e);
            }
        }
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        List list = cf.getMethods();
        int n = list.size();
        for (int i = 0; i < n; ++i) {
            MethodInfo minfo = (MethodInfo)list.get(i);
            if (minfo.isConstructor()) {
                CodeAttribute codeAttr = minfo.getCodeAttribute();
                if (codeAttr != null)
                    try {
                        Bytecode init = new Bytecode(cp, 0,
                                                codeAttr.getMaxLocals());
                        CtClass[] params
                            = Descriptor.getParameterTypes(
                                                minfo.getDescriptor(),
                                                classPool);
                        int stacksize = makeFieldInitializer(init, params);
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    public CtClass[] mayThrow() {
        ClassPool pool = thisClass.getClassPool();
        ConstPool cp = thisMethod.getConstPool();
        LinkedList list = new LinkedList();
        try {
            CodeAttribute ca = thisMethod.getCodeAttribute();
            ExceptionTable et = ca.getExceptionTable();
            int pos = currentPos;
            int n = et.size();
            for (int i = 0; i < n; ++i)
                if (et.startPc(i) <= pos && pos < et.endPc(i)) {
                    int t = et.catchType(i);
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    }

    protected void runEditor(ExprEditor ed, CodeIterator oldIterator)
        throws CannotCompileException
    {
        CodeAttribute codeAttr = oldIterator.get();
        int orgLocals = codeAttr.getMaxLocals();
        int orgStack = codeAttr.getMaxStack();
        int newLocals = locals();
        codeAttr.setMaxStack(stack());
        codeAttr.setMaxLocals(newLocals);
        ExprEditor.LoopContext context
            = new ExprEditor.LoopContext(newLocals);
        int size = oldIterator.getCodeLength();
        int endPos = oldIterator.lookAhead();
        oldIterator.move(currentPos);
        if (ed.doit(thisClass, thisMethod, context, oldIterator, endPos))
            edited = true;

        oldIterator.move(endPos + oldIterator.getCodeLength() - size);
        codeAttr.setMaxLocals(orgLocals);
        codeAttr.setMaxStack(orgStack);
        maxLocals = context.maxLocals;
        maxStack += context.maxStack;
    }
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//      CtMethod cm = cc.getDeclaredMethod(method.getName(), pool.get(new String[] {}));
     
      // 使用javaassist的反射方法获取方法的参数名
      MethodInfo methodInfo = cm.getMethodInfo();
     
      CodeAttribute codeAttribute = methodInfo.getCodeAttribute();
      LocalVariableAttribute attr = (LocalVariableAttribute) codeAttribute
          .getAttribute(LocalVariableAttribute.tag);
      if (attr == null) {
        throw new RuntimeException("class:"+clazz.getName()
            +", have no LocalVariableTable, please use javac -g:{vars} to compile the source file");
      }
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