Examples of org.objectweb.asm.MethodVisitor

org.objectweb.asm.MethodVisitor
A visitor to visit a Java method. The methods of this interface must be called in the following order: [ visitAnnotationDefault ] ( visitAnnotation | visitParameterAnnotation | visitAttribute )* [ visitCode ( visitXInsn | visitLabel | visitTryCatchBlock | visitLocalVariable | visitLineNumber)* visitMaxs ] visitEnd. In addition, the visitXInsn and visitLabel methods must be called in the sequential order of the bytecode instructions of the visited code, and the visitLocalVariable and visitLineNumber methods must be called after the labels passed as arguments have been visited. @author Eric Bruneton

        return mv;
    }


    @Deprecated
    private MethodVisitor startCallFast(ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "call", FAST_CALL_SIG, null, null);
        
        mv.visitCode();
        Label line = new Label();
        mv.visitLineNumber(0, line);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, typePath);
        return mv;
    }

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        return mv;
    }


    @Deprecated
    private MethodVisitor startDispatcher(ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "callMethod", sig(IRubyObject.class, params(ThreadContext.class, IRubyObject.class, RubyClass.class, Integer.TYPE, String.class,
                IRubyObject[].class, CallType.class, Block.class)), null, null);
        
        mv.visitCode();
        Label line = new Label();
        mv.visitLineNumber(0, line);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitTypeInsn(CHECKCAST, typePath);
        return mv;
    }

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        return mv;
    }


    @Deprecated
    private MethodVisitor startCallSFast(ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "call", FAST_CALL_SIG, null, null);
        
        mv.visitCode();
        Label line = new Label();
        mv.visitLineNumber(0, line);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, IRUB);
        return mv;
    }

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            try {
                if (c == null) {
                    Class[] signature = new Class[] { Block.class };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtor(mnamePath);
                    MethodVisitor mv = startCall(cw);
                    
                    mv.visitVarInsn(ALOAD, 3);
                    mv.visitMethodInsn(INVOKEVIRTUAL, typePath, method, sig(ret, signature));
                    mv.visitInsn(ARETURN);
                    mv.visitMaxs(1, 3);
                    c = endCall(cw, mv, mname);
                }
                InvocationCallback ic = (InvocationCallback) c.newInstance();
                ic.setArity(Arity.noArguments());
                ic.setJavaName(method);

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                Class[] descriptor = new Class[] {arg1};
                if (c == null) {
                    Class[] signature = new Class[] { arg1, Block.class };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtor(mnamePath);
                    MethodVisitor mv = startCall(cw);
                    
                    loadArguments(mv, METHOD_ARGS_INDEX, 1, descriptor);


                    mv.visitVarInsn(ALOAD, 3);
                    mv.visitMethodInsn(INVOKEVIRTUAL, typePath, method, sig(ret, signature));
                    mv.visitInsn(ARETURN);
                    mv.visitMaxs(3, 3);
                    c = endCall(cw, mv, mname);
                }
                InvocationCallback ic = (InvocationCallback) c.newInstance();
                ic.setArity(Arity.singleArgument());
                ic.setArgumentTypes(descriptor);

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                Class[] descriptor = new Class[] { arg1, arg2 };
                if (c == null) {
                    Class[] signature = new Class[] { arg1, arg2, Block.class };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtor(mnamePath);
                    MethodVisitor mv = startCall(cw);
                    
                    loadArguments(mv, METHOD_ARGS_INDEX, 2, descriptor);


                    mv.visitVarInsn(ALOAD, 3);
                    mv.visitMethodInsn(INVOKEVIRTUAL, typePath, method, sig(ret, signature));
                    mv.visitInsn(ARETURN);
                    mv.visitMaxs(4, 3);
                    c = endCall(cw, mv, mname);
                }
                InvocationCallback ic = (InvocationCallback) c.newInstance();
                ic.setArity(Arity.twoArguments());
                ic.setArgumentTypes(descriptor);

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                if (c == null) {
                    Class[] signature = new Class[] { arg1, arg2, arg3, Block.class }; 
                    Class ret = getReturnClass(method,
                            descriptor);
                    ClassWriter cw = createCtor(mnamePath);
                    MethodVisitor mv = startCall(cw);
                    
                    loadArguments(mv, METHOD_ARGS_INDEX, 3, descriptor);
                    
                    mv.visitVarInsn(ALOAD, 3);
                    mv.visitMethodInsn(INVOKEVIRTUAL, typePath, method, sig(ret, signature));
                    mv.visitInsn(ARETURN);
                    mv.visitMaxs(5, 3);
                    c = endCall(cw, mv, mname);
                }
                InvocationCallback ic = (InvocationCallback) c.newInstance();
                ic.setArity(Arity.fixed(3));
                ic.setArgumentTypes(descriptor);

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            try {
                if (c == null) {
                    Class[] signature = new Class[] { RubyKernel.IRUBY_OBJECT, Block.class };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtor(mnamePath);
                    MethodVisitor mv = startCallS(cw);
                    mv.visitVarInsn(ALOAD, 3);
                    mv.visitMethodInsn(INVOKESTATIC, typePath, method, sig(ret, signature));
                    mv.visitInsn(ARETURN);
                    mv.visitMaxs(1, 3);
                    c = endCall(cw, mv, mname);
                }
                InvocationCallback ic = (InvocationCallback) c.newInstance();
                ic.setArity(Arity.noArguments());
                ic.setJavaName(method);

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                Class[] descriptor = new Class[] {arg1};
                if (c == null) {
                    Class[] signature = new Class[] { RubyKernel.IRUBY_OBJECT, arg1, Block.class };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtor(mnamePath);
                    MethodVisitor mv = startCallS(cw);
                    
                    loadArguments(mv, METHOD_ARGS_INDEX, 1, descriptor);


                    mv.visitVarInsn(ALOAD, 3);
                    mv.visitMethodInsn(INVOKESTATIC, typePath, method, sig(ret, signature));
                    mv.visitInsn(ARETURN);
                    mv.visitMaxs(3, 3);
                    c = endCall(cw, mv, mname);
                }
                InvocationCallback ic = (InvocationCallback) c.newInstance();
                ic.setArity(Arity.singleArgument());
                ic.setArgumentTypes(descriptor);

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                Class[] descriptor = new Class[] {arg1, arg2};
                if (c == null) {
                    Class[] signature = new Class[] { RubyKernel.IRUBY_OBJECT, arg1, arg2, Block.class };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtor(mnamePath);
                    MethodVisitor mv = startCallS(cw);
                    
                    loadArguments(mv, METHOD_ARGS_INDEX, 2, descriptor);
                    mv.visitVarInsn(ALOAD, 3);
                    mv.visitMethodInsn(INVOKESTATIC, typePath, method, sig(ret, signature));
                    mv.visitInsn(ARETURN);
                    mv.visitMaxs(4, 4);
                    c = endCall(cw, mv, mname);
                }
                InvocationCallback ic = (InvocationCallback) c.newInstance();
                ic.setArity(Arity.twoArguments());
                ic.setArgumentTypes(descriptor);

View Full Code Here

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