Examples of org.objectweb.asm.ClassWriter

org.objectweb.asm.ClassWriter
A {@link ClassVisitor ClassVisitor} that generates Java class files. Moreprecisely this visitor generates a byte array conforming to the Java class file format. It can be used alone, to generate a Java class "from scratch", or with one or more {@link ClassReader ClassReader} and adapter classvisitor to generate a modified class from one or more existing Java classes. @author Eric Bruneton

            try {
                Class[] descriptor = new Class[] { arg1, arg2, arg3 };
                if (c == null) {
                    Class[] signature = descriptor;
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtorFast(mnamePath);
                    MethodVisitor mv = startCallFast(cw);
                    
                    loadArguments(mv, METHOD_ARGS_INDEX, 3, descriptor);


                    mv.visitMethodInsn(INVOKEVIRTUAL, typePath, method, sig(ret, signature));

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            Class c = tryClass(mname);
            try {
                if (c == null) {
                    Class[] signature = new Class[] { RubyKernel.IRUBY_OBJECT };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtorFast(mnamePath);
                    MethodVisitor mv = startCallSFast(cw);


                    mv.visitMethodInsn(INVOKESTATIC, typePath, method, sig(ret, signature));
                    mv.visitInsn(ARETURN);
                    mv.visitMaxs(1, 3);

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


                    mv.visitMethodInsn(INVOKESTATIC, typePath, method, sig(ret, signature));

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            try {
                Class[] descriptor = new Class[] {arg1, arg2};
                if (c == null) {
                    Class[] signature = new Class[] { RubyKernel.IRUBY_OBJECT, arg1, arg2 };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtorFast(mnamePath);
                    MethodVisitor mv = startCallSFast(cw);
                    
                    loadArguments(mv, METHOD_ARGS_INDEX, 2, descriptor);


                    mv.visitMethodInsn(INVOKESTATIC, typePath, method, sig(ret, signature));

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            try {
                Class[] descriptor = new Class[] {arg1, arg2, arg3};
                if (c == null) {
                    Class[] signature = new Class[] { RubyKernel.IRUBY_OBJECT, arg1, arg2, arg3 };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtorFast(mnamePath);
                    MethodVisitor mv = startCallSFast(cw);
                    
                    loadArguments(mv, METHOD_ARGS_INDEX, 3, descriptor);


                    mv.visitMethodInsn(INVOKESTATIC, typePath, method, sig(ret, signature));

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            Class c = tryClass(mname);
            try {
                if (c == null) {
                    Class[] signature = new Class[] { IRubyObject[].class };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtorFast(mnamePath);
                    MethodVisitor mv = startCallFast(cw);
                    
                    mv.visitVarInsn(ALOAD, METHOD_ARGS_INDEX);
                    checkCast(mv, IRubyObject[].class);
                    mv.visitMethodInsn(INVOKEVIRTUAL, typePath, method, sig(ret, signature));

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            Class c = tryClass(mname);
            try {
                if (c == null) {
                    Class[] signature = new Class[] { RubyKernel.IRUBY_OBJECT, IRubyObject[].class };
                    Class ret = getReturnClass(method, signature);
                    ClassWriter cw = createCtorFast(mnamePath);
                    MethodVisitor mv = startCallSFast(cw);
                    
                    mv.visitVarInsn(ALOAD, METHOD_ARGS_INDEX);
                    checkCast(mv, IRubyObject[].class);
                    mv.visitMethodInsn(INVOKESTATIC, typePath, method, sig(ret, signature));

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    public static Handle createHandle(JRubyClassLoader classLoader, Method method, boolean debug) {
        ClassVisitor cv;
        if (debug) {
            cv = new ASMifierClassVisitor(new PrintWriter(System.out));
        } else {
            cv = new ClassWriter(ClassWriter.COMPUTE_MAXS);
        }


        Class returnType = method.getReturnType();
        Class[] paramTypes = method.getParameterTypes();

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    public ClassVisitor getClassVisitor() {
        return classWriter;
    }
    
    public void startScript(StaticScope scope) {
        classWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);


        // Create the class with the appropriate class name and source file
        classWriter.visit(RubyInstanceConfig.JAVA_VERSION, ACC_PUBLIC + ACC_SUPER,getClassname(), null, p(AbstractScript.class), null);
        
        topLevelScope = scope;

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      _labels = new  HashMap<Integer, LabelNode>();
    }
    
    void serialize(IConstructor c,OutputStream output) throws IOException {
      ClassNode cn = buildClass(c);
      ClassWriter cw = new ClassWriter(COMPUTE_FRAMES);
      cn.accept(cw);
      output.write(cw.toByteArray());
      output.close();
    }

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