ifbrowserisnottag.java

java 写的一个新闻发布系统

package org.jahia.taglibs.util;

import org.jahia.data.*;
import org.jahia.exceptions.JahiaException;
import org.jahia.gui.GuiBean;
import org.jahia.utils.JahiaConsole;

import java.io.*;
import java.util.*;

import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;


/**
 * Class IfBrowserIsNotTag : evaluates the body only when the browser version
 *                        is not the version given as attribute
 *
 * @author  Jerome Tamiotti
 */
public class IfBrowserIsNotTag extends BodyTagSupport {

    private String version = "";
    
    public void setVersion(String version) {
        this.version = version;
    }

	public int doStartTag() {
		
        HttpServletRequest request = (HttpServletRequest)pageContext.getRequest();
		JahiaData jData = (JahiaData) request.getAttribute("org.jahia.data.JahiaData");
		if (jData == null) {
			HashMap tempEngineMap = (HashMap) request.getAttribute("org.jahia.engines.EngineHashMap");
			jData                 = (JahiaData) tempEngineMap.get("jData");
		}
		try {
			if ( !Utils.isBrowserVersion(request, jData.gui(), this.version) ) {
				return EVAL_BODY_BUFFERED;
			}
		} catch (JahiaException je) {
			JahiaConsole.println("IfBrowserIsNotTag: doStartTag ",je.toString());
		}
		return SKIP_BODY;
	}


    public int doAfterBody() {
		try {
			bodyContent.writeOut(bodyContent.getEnclosingWriter());
		} catch (IOException ioe) {
			JahiaConsole.println("IfBrowserIsNotTag: doAfterBody ",ioe.toString());
		}
		return SKIP_BODY;
	}
        
}