com.ajaxjs.mvc.view.When Maven / Gradle / Ivy

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AJAXJS Web aims to full-stack, not only the server-side framework, but also integrates the front-end library. It's written in HTML5 + Java, a successor to the JVM platform, efficient, secure, stable, cross-platform and many other advantages, but it abandoned the traditional enterprise architecture brought about by the large and bloated, emphasizing the lightweight, and fast, very suitable for the Internet fast application.

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/**
 * Copyright 2015 Sp42 [email protected]
 *
 * 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.ajaxjs.mvc.view;

import java.io.IOException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.SimpleTagSupport;

/**
 * 选择标签之 if 标签
 * 
 * @author Sp42 [email protected]
 *
 */
public class When extends SimpleTagSupport {
	/**
	 * 保存是否执行的状态
	 */
	private boolean test;

	/**
	 * 自身为 true 才执行
	 * 
	 * @param test
	 *            true 表示为执行
	 */
	public void setTest(boolean test) {
		this.test = test;
	}

	@Override
	public void doTag() throws JspException, IOException {
		Choose parent = (Choose) getParent(); // 获得父类标签对象
		if (test && !parent.isExecute()) { // 判断父类为 false 那么自身为 true 才输出
			getJspBody().invoke(null);
			parent.setExecute(true); // 把父类设置为true
		}
	}
}