showmessages.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.utils;

import java.util.Collection;
import java.util.Iterator;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

import org.apache.struts.util.ResponseUtils;
import org.butor.helper.IMessage;
import org.butor.web.context.IWebContext;
import org.butor.web.context.WebContextService;

/**
 * @author sawanai
 *
 * show messages
 */
public class ShowMessages extends TagSupport {


	protected String type = null;
	
	public String getType() {
		return type;
	}
	public void setType(String type) {
		this.type = type;
	}
	/**
	 * @see javax.servlet.jsp.tagext.Tag#doStartTag()
	 */
	public int doStartTag() throws JspException {
		
		IWebContext ctxt = WebContextService.getContext();
		if (ctxt == null) {
			return SKIP_BODY;
		}
		
		Collection messages = ctxt.getMessages();	
		if (messages == null) {
			return SKIP_BODY;
		}
		
		int severity = -1;
		if (this.type != null) {
			if (this.type.equalsIgnoreCase("error")) {
				severity = IMessage.SEVERITY_ERROR;
			} else if (this.type.equalsIgnoreCase("info")) {
				severity = IMessage.SEVERITY_INFO;
			} else if (this.type.equalsIgnoreCase("warning")) {
				severity = IMessage.SEVERITY_WARN;
			}
		}
		Iterator it = messages.iterator();
		IMessage msg = null;
		while(it.hasNext()) {
			msg = (IMessage)it.next();
			if (severity == -1 || msg.getSeverity() == severity) {
				showMessage(msg);
			}
		}
		
		return SKIP_BODY;
	}
	
	protected void showMessage(IMessage message)  throws JspException {
		ResponseUtils.write(pageContext, "<li>");
		ResponseUtils.write(pageContext, message.getText());
		ResponseUtils.write(pageContext, "</li>");
	}
}