logged.java

一个实用工具类

/*
 * Copyright (C) butor.com. All rights reserved.
 *
 * This software is published under the terms of the GNU Library General
 * Public License (GNU LGPL), a copy of which has been included with this
 * distribution in the LICENSE.txt file. 
 */
package org.butor.web.taglib.logic;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import org.butor.profile.IProfile;
import org.butor.web.context.IWebContext;
import org.butor.web.context.WebContextService;

/**
 * @author sawanai
 *
 * Tell if user logged in
 */
public class Logged extends TagSupport {

	protected String value = null;
	
	public String getValue() {
		return this.value;
	}
	public void setValue(String value) {
		this.value = value;
	}

	/**
	 * @see javax.servlet.jsp.tagext.Tag#doStartTag()
	 */
	public int doStartTag() throws JspException {
		
		if (value == null) {
			this.value = "true";
		}
	
		boolean loggedIn = false;
		
		IWebContext ctxt = WebContextService.getContext();
		if (ctxt != null) {
			IProfile profile = ctxt.getProfile();
			if (profile != null) {
				loggedIn = true;
			}
		}

		if (this.value.equalsIgnoreCase("true")) {
			if (loggedIn) {
				return EVAL_BODY_INCLUDE;
			}
		} else {
			if (!loggedIn) {
				return EVAL_BODY_INCLUDE;
			}
		}
		return SKIP_BODY;
	}
}