Package org.apache.xbean.asm5

Examples of org.apache.xbean.asm5.MethodVisitor.visitVarInsn()

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            }

            final String descriptor = Type.getConstructorDescriptor(superDefaultCt);
            final MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", descriptor, null, null);
            mv.visitCode();
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, parentClassFileName, "<init>", descriptor, false);

            // the instance provider field
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitInsn(Opcodes.ACONST_NULL);
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            mv.visitCode();
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, parentClassFileName, "<init>", descriptor, false);

            // the instance provider field
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitInsn(Opcodes.ACONST_NULL);
            mv.visitFieldInsn(Opcodes.PUTFIELD, proxyClassFileName, FIELD_INSTANCE_PROVIDER, Type.getDescriptor(Provider.class));

            mv.visitInsn(Opcodes.RETURN);
            mv.visitMaxs(-1, -1);
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            // fill method body
            mv.visitCode();

            // load the contextual instance Provider
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitFieldInsn(Opcodes.GETFIELD, proxyClassFileName, FIELD_INSTANCE_PROVIDER, Type.getDescriptor(Provider.class));

            // invoke the get() method on the Provider
            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Provider.class), "get", "()Ljava/lang/Object;", true);
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            // now calculate the parameters
            int offset = 1;
            for (Class<?> aClass : delegatedMethod.getParameterTypes())
            {
                final Type type = Type.getType(aClass);
                mv.visitVarInsn(type.getOpcode(Opcodes.ILOAD), offset);
                offset += type.getSize();
            }

            // and finally invoke the target method on the provided Contextual Instance
            final Type declaringClass = Type.getType(delegatedMethod.getDeclaringClass());
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        // invoke getMethod() with the method name and the array of types
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getDeclaredMethod", "(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;", false);

        // store the returned method for later
        mv.visitVarInsn(ASTORE, length);

        // the following code generates bytecode equivalent to:
        // return ((<returntype>) invocationHandler.invoke(this, method, new Object[] { <function arguments }))[.<primitive>Value()];

        final Label l4 = new Label();
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        // the following code generates bytecode equivalent to:
        // return ((<returntype>) invocationHandler.invoke(this, method, new Object[] { <function arguments }))[.<primitive>Value()];

        final Label l4 = new Label();
        mv.visitLabel(l4);
        mv.visitVarInsn(ALOAD, 0);

        // get the invocationHandler field from this class
        mv.visitFieldInsn(GETFIELD, proxyName, handlerName, "Ljava/lang/reflect/InvocationHandler;");

        // we want to pass "this" in as the first parameter
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        // get the invocationHandler field from this class
        mv.visitFieldInsn(GETFIELD, proxyName, handlerName, "Ljava/lang/reflect/InvocationHandler;");

        // we want to pass "this" in as the first parameter
        mv.visitVarInsn(ALOAD, 0);

        // and the method we fetched earlier
        mv.visitVarInsn(ALOAD, length);

        // need to construct the array of objects passed in
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        // we want to pass "this" in as the first parameter
        mv.visitVarInsn(ALOAD, 0);

        // and the method we fetched earlier
        mv.visitVarInsn(ALOAD, length);

        // need to construct the array of objects passed in

        // create the Object[]
        createArrayDefinition(mv, parameterTypes.length, Object.class);
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            // push number onto stack
            pushIntOntoStack(mv, i);

            if (parameterType.isPrimitive()) {
                final String wrapperType = getWrapperType(parameterType);
                mv.visitVarInsn(getVarInsn(parameterType), index);

                mv.visitMethodInsn(INVOKESTATIC, wrapperType, "valueOf", "(" + getPrimitiveLetter(parameterType) + ")L" + wrapperType + ";", false);
                mv.visitInsn(AASTORE);

                if (Long.TYPE.equals(parameterType) || Double.TYPE.equals(parameterType)) {
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                    index += 2;
                } else {
                    index++;
                }
            } else {
                mv.visitVarInsn(ALOAD, index);
                mv.visitInsn(AASTORE);
                index++;
            }
        }
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