Example usage for org.objectweb.asm Opcodes INVOKEVIRTUAL

List of usage examples for org.objectweb.asm Opcodes INVOKEVIRTUAL

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Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes INVOKEVIRTUAL.

Prototype

int INVOKEVIRTUAL

To view the source code for org.objectweb.asm Opcodes INVOKEVIRTUAL.

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Usage

From source file:gnu.classpath.tools.rmic.ClassRmicCompiler.java

License:Open Source License

private void generateMethodSkel(MethodVisitor cv, Method m, Variables var) {
    Class[] sig = m.getParameterTypes();

    Label readArgs = new Label();
    cv.visitLabel(readArgs);//from   ww  w  .jav  a 2s.c o  m

    boolean needcastcheck = false;

    // ObjectInput in = call.getInputStream();
    cv.visitVarInsn(Opcodes.ALOAD, var.get("remotecall"));
    cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteCall.class), "getInputStream",
            Type.getMethodDescriptor(Type.getType(ObjectInput.class), new Type[] {}));
    cv.visitVarInsn(Opcodes.ASTORE, var.allocate("objectinput"));

    for (int i = 0; i < sig.length; i++) {
        // dup input stream
        cv.visitVarInsn(Opcodes.ALOAD, var.get("objectinput"));

        Class readCls = sig[i].isPrimitive() ? sig[i] : Object.class;

        // in.readFoo()
        cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(ObjectInput.class), readMethod(sig[i]),
                Type.getMethodDescriptor(Type.getType(readCls), new Type[] {}));

        if (!sig[i].isPrimitive() && !sig[i].equals(Object.class)) {
            needcastcheck = true;
            cv.visitTypeInsn(Opcodes.CHECKCAST, typeArg(sig[i]));
        }

        // store arg in variable
        cv.visitVarInsn(storeOpcode(sig[i]), var.allocate(param(m, i), size(sig[i])));
    }

    var.deallocate("objectinput");

    Label doCall = new Label();
    Label closeInput = new Label();

    cv.visitJumpInsn(Opcodes.JSR, closeInput);
    cv.visitJumpInsn(Opcodes.GOTO, doCall);

    // throw new UnmarshalException
    Label handler = new Label();
    cv.visitLabel(handler);
    cv.visitVarInsn(Opcodes.ASTORE, var.allocate("exception"));
    cv.visitTypeInsn(Opcodes.NEW, typeArg(UnmarshalException.class));
    cv.visitInsn(Opcodes.DUP);
    cv.visitLdcInsn("error unmarshalling arguments");
    cv.visitVarInsn(Opcodes.ALOAD, var.deallocate("exception"));
    cv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(UnmarshalException.class), "<init>",
            Type.getMethodDescriptor(Type.VOID_TYPE,
                    new Type[] { Type.getType(String.class), Type.getType(Exception.class) }));
    cv.visitVarInsn(Opcodes.ASTORE, var.allocate("toThrow"));
    cv.visitJumpInsn(Opcodes.JSR, closeInput);
    cv.visitVarInsn(Opcodes.ALOAD, var.get("toThrow"));
    cv.visitInsn(Opcodes.ATHROW);

    cv.visitTryCatchBlock(readArgs, handler, handler, Type.getInternalName(IOException.class));
    if (needcastcheck) {
        cv.visitTryCatchBlock(readArgs, handler, handler, Type.getInternalName(ClassCastException.class));
    }

    // finally block
    cv.visitLabel(closeInput);
    cv.visitVarInsn(Opcodes.ASTORE, var.allocate("retAddress"));
    cv.visitVarInsn(Opcodes.ALOAD, var.get("remotecall"));
    cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteCall.class), "releaseInputStream",
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));
    cv.visitVarInsn(Opcodes.RET, var.deallocate("retAddress"));
    var.deallocate("toThrow");

    // do the call using args stored as variables
    cv.visitLabel(doCall);
    cv.visitVarInsn(Opcodes.ALOAD, var.get("remoteobj"));
    for (int i = 0; i < sig.length; i++)
        cv.visitVarInsn(loadOpcode(sig[i]), var.deallocate(param(m, i)));
    cv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(clazz), m.getName(),
            Type.getMethodDescriptor(m));

    Class returntype = m.getReturnType();
    if (!returntype.equals(Void.TYPE)) {
        cv.visitVarInsn(storeOpcode(returntype), var.allocate("result", size(returntype)));
    }

    // write result to result stream
    Label writeResult = new Label();
    cv.visitLabel(writeResult);
    cv.visitVarInsn(Opcodes.ALOAD, var.get("remotecall"));
    cv.visitInsn(Opcodes.ICONST_1);
    cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(RemoteCall.class), "getResultStream",
            Type.getMethodDescriptor(Type.getType(ObjectOutput.class), new Type[] { Type.BOOLEAN_TYPE }));

    if (!returntype.equals(Void.TYPE)) {
        // out.writeFoo(result)
        cv.visitVarInsn(loadOpcode(returntype), var.deallocate("result"));
        Class writeCls = returntype.isPrimitive() ? returntype : Object.class;
        cv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(ObjectOutput.class),
                writeMethod(returntype),
                Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(writeCls) }));
    }

    cv.visitInsn(Opcodes.RETURN);

    // throw new MarshalException
    Label marshalHandler = new Label();
    cv.visitLabel(marshalHandler);
    cv.visitVarInsn(Opcodes.ASTORE, var.allocate("exception"));
    cv.visitTypeInsn(Opcodes.NEW, typeArg(MarshalException.class));
    cv.visitInsn(Opcodes.DUP);
    cv.visitLdcInsn("error marshalling return");
    cv.visitVarInsn(Opcodes.ALOAD, var.deallocate("exception"));
    cv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(MarshalException.class), "<init>",
            Type.getMethodDescriptor(Type.VOID_TYPE,
                    new Type[] { Type.getType(String.class), Type.getType(Exception.class) }));
    cv.visitInsn(Opcodes.ATHROW);
    cv.visitTryCatchBlock(writeResult, marshalHandler, marshalHandler, Type.getInternalName(IOException.class));
}

From source file:hellfirepvp.astralsorcery.core.patch.helper.PatchBlockModify.java

License:Open Source License

@Override
public void patch(ClassNode cn) {
    MethodNode mn = getMethod(cn, "setBlockState", "func_177436_a",
            "(Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/state/IBlockState;)Lnet/minecraft/block/state/IBlockState;");
    for (int i = 0; i < mn.instructions.size(); i++) {
        AbstractInsnNode aNode = mn.instructions.get(i);
        if (aNode.getOpcode() == Opcodes.ARETURN) {
            AbstractInsnNode prev = aNode.getPrevious();
            if (prev instanceof VarInsnNode && prev.getOpcode() == Opcodes.ALOAD
                    && ((VarInsnNode) prev).var == 8) {
                mn.instructions.insertBefore(prev,
                        new FieldInsnNode(Opcodes.GETSTATIC, "net/minecraftforge/common/MinecraftForge",
                                "EVENT_BUS", "Lnet/minecraftforge/fml/common/eventhandler/EventBus;"));
                mn.instructions.insertBefore(prev, new TypeInsnNode(Opcodes.NEW,
                        "hellfirepvp/astralsorcery/common/event/BlockModifyEvent"));
                mn.instructions.insertBefore(prev, new InsnNode(Opcodes.DUP));
                mn.instructions.insertBefore(prev, new VarInsnNode(Opcodes.ALOAD, 0)); //Chunk
                mn.instructions.insertBefore(prev, new VarInsnNode(Opcodes.ALOAD, 1)); //Pos
                mn.instructions.insertBefore(prev, new VarInsnNode(Opcodes.ALOAD, 8)); //OldState
                mn.instructions.insertBefore(prev, new VarInsnNode(Opcodes.ALOAD, 2)); //NewState
                mn.instructions.insertBefore(prev, new MethodInsnNode(Opcodes.INVOKESPECIAL,
                        "hellfirepvp/astralsorcery/common/event/BlockModifyEvent", "<init>",
                        "(Lnet/minecraft/world/chunk/Chunk;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/state/IBlockState;Lnet/minecraft/block/state/IBlockState;)V",
                        false));/*from   w  w  w  .java 2  s  .c o  m*/
                mn.instructions.insertBefore(prev,
                        new MethodInsnNode(Opcodes.INVOKEVIRTUAL,
                                "net/minecraftforge/fml/common/eventhandler/EventBus", "post",
                                "(Lnet/minecraftforge/fml/common/eventhandler/Event;)Z", false));
                mn.instructions.insertBefore(prev, new InsnNode(Opcodes.POP));
                return;
            }
        }
    }
    throw new ASMTransformationException(
            "Could not find the expected return statement in the setBlockState method!");
}

From source file:hellfirepvp.astralsorcery.core.patch.helper.PatchKnockbackEvent.java

License:Open Source License

@Override
public void patch(ClassNode cn) {
    MethodNode mn = getMethod(cn, "knockBack", "func_70653_a", "(Lnet/minecraft/entity/Entity;FDD)V");
    AbstractInsnNode n = mn.instructions.getFirst();
    mn.instructions.insertBefore(n,/*from   ww w .  j  ava  2 s .co  m*/
            new FieldInsnNode(Opcodes.GETSTATIC, "net/minecraftforge/common/MinecraftForge", "EVENT_BUS",
                    "Lnet/minecraftforge/fml/common/eventhandler/EventBus;"));
    mn.instructions.insertBefore(n,
            new TypeInsnNode(Opcodes.NEW, "hellfirepvp/astralsorcery/common/event/EntityKnockbackEvent"));
    mn.instructions.insertBefore(n, new InsnNode(Opcodes.DUP));
    mn.instructions.insertBefore(n, new VarInsnNode(Opcodes.ALOAD, 0)); //thisEntity
    mn.instructions.insertBefore(n, new VarInsnNode(Opcodes.ALOAD, 1)); //attackingEntity
    mn.instructions.insertBefore(n, new VarInsnNode(Opcodes.FLOAD, 2)); //str
    mn.instructions.insertBefore(n,
            new MethodInsnNode(Opcodes.INVOKESPECIAL,
                    "hellfirepvp/astralsorcery/common/event/EntityKnockbackEvent", "<init>",
                    "(Lnet/minecraft/entity/EntityLivingBase;Lnet/minecraft/entity/Entity;F)V", false));
    mn.instructions.insertBefore(n,
            new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "net/minecraftforge/fml/common/eventhandler/EventBus",
                    "post", "(Lnet/minecraftforge/fml/common/eventhandler/Event;)Z", false));
    mn.instructions.insertBefore(n, new InsnNode(Opcodes.POP));
}

From source file:io.awacs.plugin.springmvc.ServiceWrapper.java

License:Apache License

/**
 * origin method: (XXX)X/* w  ww  . j a  v  a 2 s  .  c  o  m*/
 * <p>
 * proxy method: (XXXLjavax/servlet/http/HttpServletRequest;)X
 * req -> localIndex - 1
 *
 * @param cn
 * @param origin
 * @return
 */
private MethodNode doProxy(ClassNode cn, MethodNode origin) {

    MethodNode newNode = copyMethod(origin);
    //move annotations
    hideAnnotations(origin);

    LabelNode l0 = new LabelNode();
    LabelNode l1 = new LabelNode();
    LabelNode l2 = new LabelNode();

    String returnType = origin.desc.substring(origin.desc.indexOf(')') + 1);

    int localIndex = copyParameters(origin, newNode, l0, l2);

    newNode.tryCatchBlocks.add(new TryCatchBlockNode(l0, l1, l2, "java/lang/Exception"));

    //localIndex -> elapsedTime
    newNode.localVariables.add(new LocalVariableNode("elapsedTime", "J", null, l0, l1, localIndex));

    //
    newNode.instructions.add(l0);

    // long elapsedTime = System.currentTimeMillis();
    newNode.instructions
            .add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/lang/System", "currentTimeMillis", "()J"));
    newNode.instructions.add(new VarInsnNode(Opcodes.LSTORE, localIndex));

    int paramCount = getParamCount(origin.desc, origin.access);

    //load?
    for (int i = 0; i < paramCount; i++) {
        LocalVariableNode node = (LocalVariableNode) newNode.localVariables.get(i);
        switch (node.desc) {
        case "J":
            newNode.instructions.add(new VarInsnNode(Opcodes.LLOAD, node.index));
            break;
        case "D":
            newNode.instructions.add(new VarInsnNode(Opcodes.DLOAD, node.index));
            break;
        case "F":
            newNode.instructions.add(new VarInsnNode(Opcodes.FLOAD, node.index));
            break;
        case "I":
            newNode.instructions.add(new VarInsnNode(Opcodes.ILOAD, node.index));
            break;
        case "S":
            newNode.instructions.add(new VarInsnNode(Opcodes.ILOAD, node.index));
            break;
        case "Z":
            newNode.instructions.add(new VarInsnNode(Opcodes.ILOAD, node.index));
            break;
        case "B":
            newNode.instructions.add(new VarInsnNode(Opcodes.ILOAD, node.index));
            break;
        case "C":
            newNode.instructions.add(new VarInsnNode(Opcodes.ILOAD, node.index));
            break;
        default:
            newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, node.index));
            break;
        }
    }
    //
    newNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, cn.name, origin.name, origin.desc));

    //
    newNode.instructions
            .add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/lang/System", "currentTimeMillis", "()J"));
    newNode.instructions.add(new VarInsnNode(Opcodes.LLOAD, localIndex));
    newNode.instructions.add(new InsnNode(Opcodes.LSUB));
    newNode.instructions.add(new VarInsnNode(Opcodes.LSTORE, localIndex));

    newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, localIndex - 1));
    newNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE,
            "javax/servlet/http/HttpServletRequest", "getRequestURI", "()Ljava/lang/String;"));

    //?
    newNode.instructions.add(new VarInsnNode(Opcodes.LLOAD, localIndex));
    //SpringmvcPlugin.incrAccess(uri, elapsedTime);
    newNode.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC,
            "io/awacs/plugin/springmvc/SpringmvcPlugin", "incrAccess", "(Ljava/lang/String;J)V"));
    //
    newNode.instructions.add(l1);
    switch (returnType) {
    case "J":
        newNode.instructions.add(new InsnNode(Opcodes.LRETURN));
        break;
    case "D":
        newNode.instructions.add(new InsnNode(Opcodes.DRETURN));
        break;
    case "F":
        newNode.instructions.add(new InsnNode(Opcodes.FRETURN));
        break;
    case "I":
        newNode.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "S":
        newNode.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "C":
        newNode.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "B":
        newNode.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "Z":
        newNode.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    default:
        newNode.instructions.add(new InsnNode(Opcodes.ARETURN));
        break;
    }

    newNode.instructions.add(l2);
    newNode.instructions
            .add(new FrameNode(Opcodes.F_SAME1, 0, null, 1, new Object[] { "java/lang/Exception" }));
    newNode.instructions.add(new VarInsnNode(Opcodes.ASTORE, localIndex));

    newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, localIndex - 1));
    newNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE,
            "javax/servlet/http/HttpServletRequest", "getRequestURI", "()Ljava/lang/String;"));

    newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, localIndex));
    newNode.instructions
            .add(new MethodInsnNode(Opcodes.INVOKESTATIC, "io/awacs/plugin/springmvc/SpringmvcPlugin",
                    "incrFailure", "(Ljava/lang/String;Ljava/lang/Throwable;)V"));

    newNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, localIndex));
    newNode.instructions.add(new InsnNode(Opcodes.ATHROW));
    newNode.maxLocals = origin.maxLocals + 3;
    newNode.maxStack = Math.max(localIndex + 2, 6);
    return newNode;
}

From source file:io.awacs.plugin.stacktrace.ClassTransformer.java

License:Apache License

/**
 * ?/*w w  w.  j  ava 2 s .  co m*/
 * 1?try catch?                 try{
 * 2????        io.awacs.plugin.stacktrace.StackFrames.init();
 * 3????                io.awacs.plugin.stacktrace.StackFrames.push(className,methodName,0);
 * 4?                          Object val = methodName_origin_className(args);
 * 5?????                io.awacs.plugin.stacktrace.StackFrames.push(className,methodName,1);
 * 5???          List list = io.awacs.plugin.stacktrace.StackFrames.dump();
 * 7?????          io.awacs.plugin.stacktrace.StackTracePlugin.incrAccess(list);
 * 8?                          return val;
 * }catch(java.lang.Exception e){
 * 9??                io.awacs.plugin.stacktrace.StackTracePlugin.incrFailure(e);
 * 10?               throw e;
 * }
 */
private void transformTerminatedMethod(MethodNode origin, MethodNode proxy, ClassNode owner) {
    LabelNode l0 = new LabelNode();
    LabelNode l1 = new LabelNode();
    LabelNode l2 = new LabelNode();
    //try catch?
    proxy.tryCatchBlocks.add(new TryCatchBlockNode(l0, l1, l2, "java/lang/Exception"));
    proxy.instructions.add(l0);
    //?
    proxy.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "io/awacs/plugin/stacktrace/StackFrames",
            "init", "()V", false));
    proxy.instructions.add(new LdcInsnNode(owner.name.replaceAll("/", ".")));
    proxy.instructions.add(new LdcInsnNode(proxy.name));
    proxy.instructions.add(new LdcInsnNode(0));
    //
    proxy.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "io/awacs/plugin/stacktrace/StackFrames",
            "push", "(Ljava/lang/String;Ljava/lang/String;I)V", false));
    int varIndex = 0;//???
    //???,????this?
    if ((proxy.access & Opcodes.ACC_STATIC) != Opcodes.ACC_STATIC) {
        proxy.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
        varIndex = 1;
    }
    List<String> parameters = resolveParameters(proxy.desc);
    //???
    for (String param : parameters) {
        VarInsnNode insnNode;
        switch (param) {
        case "J":
            insnNode = new VarInsnNode(Opcodes.LLOAD, varIndex);
            varIndex += 2;
            break;
        case "D":
            insnNode = new VarInsnNode(Opcodes.DLOAD, varIndex);
            varIndex += 2;
            break;
        case "F":
            insnNode = new VarInsnNode(Opcodes.FLOAD, varIndex++);
            break;
        case "I":
            insnNode = new VarInsnNode(Opcodes.ILOAD, varIndex++);
            break;
        case "S":
            insnNode = new VarInsnNode(Opcodes.ILOAD, varIndex++);
            break;
        case "Z":
            insnNode = new VarInsnNode(Opcodes.ILOAD, varIndex++);
            break;
        case "B":
            insnNode = new VarInsnNode(Opcodes.ILOAD, varIndex++);
            break;
        case "C":
            insnNode = new VarInsnNode(Opcodes.ILOAD, varIndex++);
            break;
        default:
            insnNode = new VarInsnNode(Opcodes.ALOAD, varIndex++);
            break;
        }
        proxy.instructions.add(insnNode);
    }
    //
    if ((origin.access & Opcodes.ACC_STATIC) == Opcodes.ACC_STATIC)
        proxy.instructions
                .add(new MethodInsnNode(Opcodes.INVOKESTATIC, owner.name, origin.name, origin.desc, false));
    else
        proxy.instructions
                .add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, owner.name, origin.name, origin.desc, false));
    proxy.instructions.add(new LdcInsnNode(owner.name.replaceAll("/", ".")));
    proxy.instructions.add(new LdcInsnNode(proxy.name));
    proxy.instructions.add(new LdcInsnNode(1));
    //?
    proxy.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "io/awacs/plugin/stacktrace/StackFrames",
            "push", "(Ljava/lang/String;Ljava/lang/String;I)V", false));
    //??
    proxy.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "io/awacs/plugin/stacktrace/StackFrames",
            "dump", "()Ljava/util/List;", false));
    //???
    proxy.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC,
            "io/awacs/plugin/stacktrace/StackTracePlugin", "incrAccess", "(Ljava/util/List;)V", false));
    proxy.instructions.add(l1);
    //
    String returnType = origin.desc.substring(origin.desc.indexOf(')') + 1);
    switch (returnType) {
    case "J":
        proxy.instructions.add(new InsnNode(Opcodes.LRETURN));
        break;
    case "D":
        proxy.instructions.add(new InsnNode(Opcodes.DRETURN));
        break;
    case "F":
        proxy.instructions.add(new InsnNode(Opcodes.FRETURN));
        break;
    case "I":
        proxy.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "S":
        proxy.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "C":
        proxy.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "B":
        proxy.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "Z":
        proxy.instructions.add(new InsnNode(Opcodes.IRETURN));
        break;
    case "V":
        proxy.instructions.add(new InsnNode(Opcodes.RETURN));
        break;
    default:
        proxy.instructions.add(new InsnNode(Opcodes.ARETURN));
        break;
    }
    proxy.instructions.add(l2);
    //?
    proxy.instructions.add(new FrameNode(Opcodes.F_SAME1, 0, null, 1, new Object[] { "java/lang/Exception" }));
    proxy.instructions.add(new VarInsnNode(Opcodes.ASTORE, varIndex));
    proxy.instructions.add(new VarInsnNode(Opcodes.ALOAD, varIndex));
    proxy.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC,
            "io/awacs/plugin/stacktrace/StackTracePlugin", "incrFailure", "(Ljava/lang/Throwable;)V", false));
    proxy.instructions.add(new VarInsnNode(Opcodes.ALOAD, varIndex));
    proxy.instructions.add(new InsnNode(Opcodes.ATHROW));
    proxy.maxLocals = varIndex + 1;
    proxy.maxStack = Math.max(varIndex, 5);
}

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates _asActions() method as following:
 * //from  w  w w  . j  a  v  a 2 s.c om
 * if(name.equals("upload"))
 *    return upload();
 * else if(name.equals("save"))
 *    return save();
 * else if(name.equals("main"))
 *    return main();
 * else if(name.equals("redir"))
 *    return redir();
 * else
 *    throw new RuntimeException("no action named "+name);
 */
private void createActionMethod() {
    StringBuilder sb = new StringBuilder();
    sb.append("(").append(Type.getType(String.class)).append(")").append(Type.getType(Result.class));
    String desc = sb.toString();

    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asAction", desc, null, null);

    Label start = new Label();
    Label next = new Label();
    Label variable = new Label();
    boolean first = true;

    for (String name : reflector.getActions().keySet()) {
        Label l0 = null;
        Label l1 = new Label();

        if (first) {
            l0 = new Label();
            first = false;
        } else {
            l0 = next;
            next = new Label();
        }

        mv.visitLabel(l0);
        if (!first) {
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        }
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitLdcInsn(name);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        mv.visitJumpInsn(Opcodes.IFEQ, next);

        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), name,
                "()" + Type.getType(Result.class), false);
        mv.visitInsn(Opcodes.ARETURN);
    }

    mv.visitLabel(next);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitTypeInsn(Opcodes.NEW, "java/lang/NoSuchMethodException");
    mv.visitInsn(Opcodes.DUP);
    mv.visitTypeInsn(Opcodes.NEW, "java/lang/StringBuilder");
    mv.visitInsn(Opcodes.DUP);
    mv.visitLdcInsn("no @Action named ");
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V",
            false);
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;",
            false);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/NoSuchMethodException", "<init>",
            "(Ljava/lang/String;)V", false);
    mv.visitInsn(Opcodes.ATHROW);

    mv.visitLabel(variable);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, next, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, next, 1);

    mv.visitMaxs(5, 2);
    mv.visitEnd();
}

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates the _asParameter() getter as
 * //from  ww  w  .java  2  s. c om
 * public Object _asParameter(String name) {
 *    if(name.equals("name"))
 *       return getName();
 *    if(name.equals("date"))
 *       return getDate();
 *    ...
 *    return null;
 * }
 */
private void createParametersGetterMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asParameter",
            "(Ljava/lang/String;)Ljava/lang/Object;", null, null);

    Label start = new Label();
    Label next = new Label();
    Label variable = new Label();
    boolean first = true;

    for (String name : reflector.getParameters().keySet()) {
        Label l0 = null;
        Label l1 = new Label();

        if (first) {
            l0 = new Label();
            first = false;
        } else {
            l0 = next;
            next = new Label();
        }

        mv.visitLabel(l0);
        if (!first)
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitLdcInsn(name);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        mv.visitJumpInsn(Opcodes.IFEQ, next);

        String methodGetterName = reflector.getGetters().get(name).getName();
        String methodGetterDesc = "()" + Type.getDescriptor(reflector.getParameters().get(name));

        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), methodGetterName,
                methodGetterDesc, false);
        mv.visitInsn(Opcodes.ARETURN);
    }

    mv.visitLabel(next);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitInsn(Opcodes.ACONST_NULL);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitLabel(variable);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, variable, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, variable, 1);
    mv.visitMaxs(2, 2);
    mv.visitEnd();
}

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Creates the code as:/*from   www . j a  v a  2 s  .  c  o  m*/
 * 
 * public void _asParameter(String name, Object value) {
 *    if(name.equals("name") {
 *       setName((String)value);
 *       return;
 *    }
 *   if(name.equals("date") {
 *      setDate((Date)value);
 *      return;
 *   }
 *   ...
 *    return;
 * } 
 */
private void createParametersSetterMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asParameter",
            "(Ljava/lang/String;Ljava/lang/Object;)V", null, null);

    Label start = new Label();
    Label next = new Label();
    Label variable = new Label();
    boolean first = true;

    for (String name : reflector.getParameters().keySet()) {
        Label l0 = null;
        Label l1 = new Label();
        Label l2 = new Label();

        if (first) {
            l0 = new Label();
            first = false;
        } else {
            l0 = next;
            next = new Label();
        }

        mv.visitLabel(l0);
        if (!first)
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitLdcInsn(name);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        mv.visitJumpInsn(Opcodes.IFEQ, next);

        Class<?> parameterType = reflector.getParameters().get(name);

        String setterMethodName = reflector.getSetters().get(name).getName();
        String setterMethodDesc = "(" + Type.getDescriptor(parameterType) + ")V";

        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 2);
        mv.visitTypeInsn(Opcodes.CHECKCAST, Type.getInternalName(parameterType));
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), setterMethodName,
                setterMethodDesc, false);

        mv.visitLabel(l2);
        mv.visitInsn(Opcodes.RETURN);
    }

    mv.visitLabel(next);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitInsn(Opcodes.RETURN);

    mv.visitLabel(variable);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, next, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, next, 1);
    mv.visitLocalVariable("value", "Ljava/lang/Object;", null, start, next, 2);
    mv.visitMaxs(2, 3);
    mv.visitEnd();
}

From source file:io.syncframework.optimizer.OInitializerClassVisitor.java

License:Apache License

/**
 * Generates the code://w  w  w  .  ja  v  a 2  s . c o m
 * 
 * public void _asDestroy() {
 *    return destroy();
 * }
 */
public void createDestroyMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asDestroy", "()V", null, null);
    Label l0 = new Label();
    if (reflector.getInit() != null) {
        mv.visitLabel(l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), "destroy", "()V", false);
        mv.visitInsn(Opcodes.RETURN);
    } else {
        mv.visitLabel(l0);
        mv.visitInsn(Opcodes.RETURN);
    }

    Label l1 = new Label();
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

From source file:io.syncframework.optimizer.OInitializerClassVisitor.java

License:Apache License

/**
 * Generates the code:/*w  w  w  . j  a va 2 s .  c  om*/
 * 
 * public void _asInit() {
 *    return init();
 * }
 */
public void createInitMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asInit", "()V", null, null);
    Label l0 = new Label();
    if (reflector.getInit() != null) {
        mv.visitLabel(l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), "init", "()V", false);
        mv.visitInsn(Opcodes.RETURN);
    } else {
        mv.visitLabel(l0);
        mv.visitInsn(Opcodes.RETURN);
    }
    Label l1 = new Label();
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}