grpusrengineresourcebundle.java

java 写的一个新闻发布系统

//
//                                   ____.
//                       __/\ ______|    |__/\.     _______
//            __   .____|    |       \   |    +----+       \
//    _______|  /--|    |    |    -   \  _    |    :    -   \_________
//   \\______: :---|    :    :           |    :    |         \________>
//           |__\---\_____________:______:    :____|____:_____\
//                                      /_____|
//
//                 . . . i n   j a h i a   w e   t r u s t . . .
//
//
//
// NK 18.02.2002 - added in Jahia
//

package org.jahia.resourcebundle;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Locale;
import java.util.ResourceBundle;
import java.security.acl.Group;
import java.security.Principal;

import javax.servlet.*;					            // ServletException
import javax.servlet.http.*;			            // HttpServletRequest, HttpSerlvetResponse

import org.jahia.services.pages.JahiaPage;
import org.jahia.utils.JahiaConsole;
import org.jahia.params.ParamBean;
import org.jahia.services.usermanager.*;
import org.jahia.registries.ServicesRegistry;


/**
 * Tools to handles Pages engine resource bundle for a given principal.
 * 
 * @author Khue Nguyen
 * @version 1.0
 */
public class GrpUsrEngineResourceBundle
{

    private static final String CLASS_NAME = 
                GrpUsrEngineResourceBundle.class.getName();
    
	private static GrpUsrEngineResourceBundle mInstance ;
	
	private Hashtable usrResources ;
	private Hashtable grpResources ;
	

	private GrpUsrEngineResourceBundle(){
		usrResources = new Hashtable();
		grpResources = new Hashtable();
	}

	public static synchronized GrpUsrEngineResourceBundle getInstance(){
		
		if ( mInstance == null ){
			mInstance = new GrpUsrEngineResourceBundle();
		}	
		return mInstance;
	} 	

	/**
	 * Add a resource bundle
	 * 
	 * @param JahiaPage page
	 * @param Principal p, a JahiaUser or JahiaGroup
	 * @param ResourceBundle res
	 */
	public void addResourceBundle(JahiaPage page, Principal p, ResourceBundle res){
		
		if ( page == null || res == null || p == null )
			return;

        boolean isGroup = ( p instanceof Group );
        String key;
        if ( isGroup ){
            key = ((JahiaGroup)p).getGroupKey();                    
            JahiaConsole.println(CLASS_NAME+".addResourceBundle","Added grp res. bun. : " + key ) ;
            grpResources.put( JahiaResourceBundle.ENGINE_DEFAULT_RESOURCE_BUNDLE + "_" + page.getID() + "_" + key , res );
        } else {
            key = ((JahiaUser)p).getUserKey();
            JahiaConsole.println(CLASS_NAME+".addResourceBundle","Added user res. bun. : " + key ) ;
            usrResources.put( JahiaResourceBundle.ENGINE_DEFAULT_RESOURCE_BUNDLE + "_" + page.getID() + "_" + key , res );
        }
	}

	/**
	 * Returns a resource bundle for a given page and a given principal
	 *
	 * @param JahiaPage page
	 * @param Principal p, a JahiaUser or JahiaGroup
	 * @return ResourceBundle res
	 */
	public ResourceBundle getResourceBundle(JahiaPage page, Principal p){

		if ( page == null || p == null )
			return null;

        boolean isGroup = ( p instanceof Group );
        String key;
        if ( isGroup ){
            key = ((JahiaGroup)p).getGroupKey();                    
            //JahiaConsole.println(CLASS_NAME+".getResourceBundle","For group : " + key ) ;
        } else {
            key = ((JahiaUser)p).getUserKey();
            //JahiaConsole.println(CLASS_NAME+".getResourceBundle","For user : " + key ) ;
        }

		ResourceBundle res;
		if ( !isGroup ){
		    res = (ResourceBundle)usrResources.get( JahiaResourceBundle.ENGINE_DEFAULT_RESOURCE_BUNDLE 
		                      + "_" + page.getID() + "_" + key );
            if ( res == null )
                res = getGrpResourceBundle(page,p);
		} else {
		    res = getGrpResourceBundle(page,p);
		}
		return res;
	}

	/**
	 * Returns a resource bundle for a given JahiaUser looking at its group membership
	 *
	 * @param JahiaPage page
	 * @param Principal p, a JahiaUser or JahiaGroup
	 * @return ResourceBundle res
	 */
	private ResourceBundle getGrpResourceBundle(JahiaPage page, Principal p){
		
		//JahiaConsole.println(CLASS_NAME+".getGrpResourceBundle()","Started looking for page :" + page.getID());
		
		if ( page == null || p == null )
			return null;

	    JahiaGroup grp;
        String grpKey;
        String key ;
        String resName = JahiaResourceBundle.ENGINE_DEFAULT_RESOURCE_BUNDLE + "_" + page.getID() + "_";        
		ResourceBundle res = null;
		Enumeration keys = grpResources.keys();
		while (keys.hasMoreElements()){
		    grpKey = "";
		    key = (String)keys.nextElement();
		    //JahiaConsole.println(CLASS_NAME+".getGrpResourceBundle()","res key found :" + key);

		    if ( key.startsWith(resName) ){    
		        grpKey = key.substring(resName.length(),key.length());
		        //JahiaConsole.println(CLASS_NAME+".getGrpResourceBundle()","groupkey :" + grpKey);

                grp = ServicesRegistry.getInstance().getJahiaGroupManagerService().lookupGroup(grpKey);
                if ( grp != null && grp.isMember(p)){
		            //JahiaConsole.println(CLASS_NAME+".getGrpResourceBundle()","user " + ((JahiaUser)p).getUsername() + " is member of group :" + grpKey);
                    res = (ResourceBundle)grpResources.get(key);   
                    if ( res != null )
                        return res;                    
                }
		    }
        }                                   
		return res;
	}

}