/**

  * Copyright 2010 The Kuali Foundation Licensed under the

  * Educational Community 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.osedu.org/licenses/ECL-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 org.kuali.student.common.ws.security;

 import java.util.HashMap;

 import java.util.Map;

 import javax.xml.parsers.DocumentBuilder;

 import javax.xml.parsers.DocumentBuilderFactory;

 import org.w3c.dom.Document;

 import org.w3c.dom.Element;

 import org.w3c.dom.NodeList;

 /**

  * Since we don't have an authentication service, this is a stupid class that  

  * verifies passwords and returns person ids based on a ks.users.xml file loaded from the classpath.

  *

  */

 public class AuthenticationService {

     private static Map<String, String> passwords;

     private static Map<String, String> personids;

     //Load personids and passwords from ks.users.xml file into a hash

     static {

         passwords = new HashMap<String, String>();

         personids = new HashMap<String, String>();

         try {

             DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();

             DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();

             Document doc = docBuilder.parse(AuthenticationService.class.getClassLoader().getResourceAsStream("ks.users.xml"));        

             NodeList users = doc.getElementsByTagName("user");

             for(int s=0; s < users.getLength() ; s++){

                 Element user = (Element)users.item(s);

                 passwords.put(user.getAttribute("username"), user.getAttribute("password"));

                 personids.put(user.getAttribute("username"), user.getAttribute("personid"));

             }

         } catch (Exception e){

         }

     }

     public static boolean validateUsernamePassword(String username, String password){

         return password.equals(passwords.get(username));

     }

     public static String getPasswordForUsername(String username){

         return passwords.get(username);

     }

     public static String getPersonIdForUsername(String username){

         return personids.get(username);

     }

 }