Package org.objectweb.asm

Examples of org.objectweb.asm.ClassWriter.visitMethod()

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        // GENERATE <init>(<type> target, ScriptSource source, Integer lineNumber)

        String methodDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE,
                new Type[]{superclassType, scriptSourceType, integerType});
        MethodVisitor methodVisitor = visitor.visitMethod(Opcodes.ACC_PUBLIC, "<init>", methodDescriptor, null,
                new String[0]);
        methodVisitor.visitCode();

        boolean noArgsConstructor;
        try {
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        // END <init>(<type> target, ScriptSource source, Integer lineNumber)

        for (Method method : ExceptionHelper.class.getDeclaredMethods()) {
            // GENERATE public <type> <method>() { return helper.<method>(); }
            methodDescriptor = Type.getMethodDescriptor(Type.getType(method.getReturnType()), new Type[0]);
            methodVisitor = visitor.visitMethod(Opcodes.ACC_PUBLIC, method.getName(), methodDescriptor, null,
                    new String[0]);
            methodVisitor.visitCode();

            methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
            methodVisitor.visitFieldInsn(Opcodes.GETFIELD, generatedType.getInternalName(), "helper",
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                superclassType.getInternalName(), new String[0]);

        // Constructor

        String constructorDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[0]);
        MethodVisitor methodVisitor = visitor.visitMethod(Opcodes.ACC_PUBLIC, "<init>", constructorDescriptor, null,
                new String[0]);
        methodVisitor.visitCode();

        // super()
        methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
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        methodVisitor.visitEnd();

        // run() method

        String runDesciptor = Type.getMethodDescriptor(Type.getType(Object.class), new Type[0]);
        methodVisitor = visitor.visitMethod(Opcodes.ACC_PUBLIC, "run", runDesciptor, null, new String[0]);
        methodVisitor.visitCode();

        // return null
        methodVisitor.visitInsn(Opcodes.ACONST_NULL);
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        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, classname, null, p(Object.class), new String[] {p(Unsafe.class)});
        cw.visitSource("<generated>", null);
       
        SkinnyMethodAdapter method = new SkinnyMethodAdapter(cw.visitMethod(ACC_PUBLIC, "<init>", sig(void.class), null, null));
        method.start();
        method.aload(0);
        method.invokespecial(p(Object.class), "<init>", sig(void.class));
        method.voidreturn();
        method.end();
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        method.aload(0);
        method.invokespecial(p(Object.class), "<init>", sig(void.class));
        method.voidreturn();
        method.end();
       
        method = new SkinnyMethodAdapter(cw.visitMethod(ACC_PUBLIC, "throwException", sig(void.class, Throwable.class), null, null));
        method.start();
        method.aload(1);
        method.athrow();
        method.end();
       
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        cw.visitField(ACC_STATIC | ACC_PRIVATE, "ruby", ci(Ruby.class), null, null).visitEnd();
        cw.visitField(ACC_STATIC | ACC_PRIVATE, "rubyClass", ci(RubyClass.class), null, null).visitEnd();
        cw.visitField(ACC_PRIVATE | ACC_FINAL, "self", ci(IRubyObject.class), null, null).visitEnd();
       
        // create constructor
        SkinnyMethodAdapter initMethod = new SkinnyMethodAdapter(cw.visitMethod(ACC_PUBLIC, "<init>", sig(void.class), null, null));
        initMethod.aload(0);
        initMethod.invokespecial(p(Object.class), "<init>", sig(void.class));
       
        // wrap self and store the wrapper
        initMethod.aload(0);
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        // end constructor
        initMethod.voidreturn();
        initMethod.end();
       
        // start setup method
        SkinnyMethodAdapter setupMethod = new SkinnyMethodAdapter(cw.visitMethod(ACC_STATIC | ACC_PUBLIC | ACC_SYNTHETIC, "__setup__", sig(void.class, RubyClass.class), null, null));
        setupMethod.start();
       
        // set RubyClass
        setupMethod.aload(0);
        setupMethod.dup();
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            for (Method method : entry.getValue()) {
                Class[] paramTypes = method.getParameterTypes();
                Class returnType = method.getReturnType();
               
                SkinnyMethodAdapter mv = new SkinnyMethodAdapter(
                        cw.visitMethod(ACC_PUBLIC, simpleName, sig(returnType, paramTypes), null, null));
                mv.start();

                String fieldName = mangleMethodFieldName(simpleName, paramTypes);
               
                // try specific name first, falling back on simple name
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        cw.visitField(ACC_STATIC | ACC_PRIVATE, "ruby", ci(Ruby.class), null, null).visitEnd();
        cw.visitField(ACC_STATIC | ACC_PRIVATE, "rubyClass", ci(RubyClass.class), null, null).visitEnd();
        cw.visitField(ACC_PRIVATE | ACC_FINAL, "self", ci(IRubyObject.class), null, null).visitEnd();
       
        // create constructor
        SkinnyMethodAdapter initMethod = new SkinnyMethodAdapter(cw.visitMethod(ACC_PUBLIC, "<init>", sig(void.class, IRubyObject.class), null, null));
        initMethod.aload(0);
        initMethod.invokespecial(p(Object.class), "<init>", sig(void.class));
       
        // store the wrapper
        initMethod.aload(0);
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