package org.apache.ws.scout.registry;
   
   import java.util.Hashtable;
   import org.uddi.api_v3.AuthToken;
   
   public class AuthTokenV3Singleton {
   	private static AuthTokenV3Singletoningleton.html#AuthTokenV3Singleton">AuthTokenV3Singleton instance = new AuthTokenV3Singleton();
   	private static Hashtable cachedAuthTokenHash = new Hashtable();
   	
  	private AuthTokenV3Singleton() {
  	}
  
  	public static AuthToken getToken(String username) {
  		if (instance == null) {
  			instance = new AuthTokenV3Singleton();
  		}
  		if (cachedAuthTokenHash.containsKey(username)) 
  			return (AuthToken)cachedAuthTokenHash.get(username);
  	
  		return null;
  	} 	
  	
  	public synchronized static void addAuthToken(String username, 
  			AuthToken token) {
  		if (instance == null) {
  			instance = new AuthTokenV3Singleton();
  		}
  		if (token!=null) cachedAuthTokenHash.put(username, token);
  	}
  	
  	public synchronized static void deleteAuthToken(String username) {
  		if (instance == null) {
  			instance = new AuthTokenV3Singleton();
  		} else {
  			if (cachedAuthTokenHash.containsKey(username)) {
  				cachedAuthTokenHash.remove(username);
  			}
  		}
  	}
  }