InvocationWrapper.java

/**
 * Copyright (c) 2011-2017, James Zhan 詹波 (jfinal@126.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jfinal.aop;

import java.lang.reflect.Method;
import com.jfinal.core.Controller;

/**
 * InvocationWrapper invoke the InterceptorStack.
 */
class InvocationWrapper extends Invocation {
	
	private Interceptor[] inters;
	private Invocation invocation;
	private int index = 0;
	
	InvocationWrapper(Invocation invocation, Interceptor[] inters) {
		this.invocation = invocation;
		this.inters = inters;
	}
	
	/**
	 * Invoke the action
	 */
	@Override
	public final void invoke() {
		if (index < inters.length)
			inters[index++].intercept(this);
		else if (index++ == inters.length)
			invocation.invoke();
	}
	
	@Override
	public Object getArg(int index) {
		return invocation.getArg(index);
	}
	
	@Override
	public Object[] getArgs() {
		return invocation.getArgs();
	}
	
	@Override
	public void setArg(int index, Object value) {
		invocation.setArg(index, value);
	}
	
	/**
	 * Get the target object which be intercepted
	 * <pre>
	 * Example:
	 * OrderService os = getTarget();
	 * </pre>
	 */
	@SuppressWarnings("unchecked")
	@Override
	public <T> T getTarget() {
		return (T)invocation.getTarget();
	}
	
	/**
	 * Return the method of this action.
	 * <p>
	 * You can getMethod.getAnnotations() to get annotation on action method to do more things
	 */
	@Override
	public Method getMethod() {
		return invocation.getMethod();
	}
	
	/**
	 * Return the method name of this action's method.
	 */
	@Override
	public String getMethodName() {
		return invocation.getMethodName();
	}
	
	/**
	 * Get the return value of the target method
	 */
	@SuppressWarnings("unchecked")
	@Override
	public <T> T getReturnValue() {
		return (T)invocation.getReturnValue();
	}
	
	/**
	 * Set the return value of the target method
	 */
	@Override
	public void setReturnValue(Object returnValue) {
		invocation.setReturnValue(returnValue);
	}
	
	// ---------
	
	/**
	 * Return the controller of this action.
	 */
	@Override
	public Controller getController() {
		return invocation.getController();
	}
	
	/**
	 * Return the action key.
	 * actionKey = controllerKey + methodName
	 */
	@Override
	public String getActionKey() {
		return invocation.getActionKey();
	}
	
	/**
	 * Return the controller key.
	 */
	@Override
	public String getControllerKey() {
		return invocation.getControllerKey();
	}
	
	/**
	 * Return view path of this controller.
	 */
	@Override
	public String getViewPath() {
		return invocation.getViewPath();
	}
	
	@Override
	public boolean isActionInvocation() {
		return invocation.isActionInvocation();
	}
	
	/*
	 * It should be added method below when com.jfinal.aop.Invocation add method, otherwise null will be returned.
	 */
}