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JSON remote data end point service via HTTP

There is a newer version: 1.3.2

package com.khs.sherpa.json.service;

import java.math.BigInteger;
import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

/*
 * Copyright 2012 the original author or authors.
 *
 * Licensed under the Apache 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.apache.org/licenses/LICENSE-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.
 */

public class DefaultTokenService implements SessionTokenService {

	public Map tokens = new LinkedHashMap();

	private SecureRandom random = new SecureRandom();
	
	public String newToken(String userid) {
		return new BigInteger(130, random).toString(32);
	}

	public SessionStatus isActive(String userid, String tokenId) {

		SessionToken token = tokens.get(tokenId);
		if (token == null) {
			return SessionStatus.NOT_AUTHENTICATED;
		}

		if (token.getToken().equals(tokenId) && token.getUserid().equals(userid)) {

			// validate timeout
			long current = System.currentTimeMillis();
			if (token.getTimeout() > 0 && current - token.getLastActive() > token.getTimeout()) {
				return SessionStatus.TIMED_OUT;
			}			
		} else {
			return SessionStatus.INVALID_TOKEN;
		}

		return SessionStatus.AUTHENTICATED;
	}

	public void activate(String userid, SessionToken token) {
		tokens.put(token.getToken(), token);
	}

	private void deactivate(String token) {
		tokens.remove(token);
	}
	
	public void deactivateUser(String userid) {
		
		 List users = new ArrayList();	
		 for (SessionToken session : tokens.values()) {
			 if (session.getUserid().equals(userid)) {
				 users.add(session.getToken()); 
			 }
		  }		 
		 // deactivate tokens
		 for (String token : users) {
			 deactivate(token);
		 }
		
	}
	
    public List sessions() {
	   
	   List results = new ArrayList();
	   for (SessionToken token : tokens.values()) {
		   results.add(token);
	   }
	  	   
	   return results;
	   
   }

	public boolean hasRole(String userid, String tokenId, String role) {
		SessionToken token = tokens.get(tokenId);
		if (token == null) {
			return false;
		}
		if(token.getRoles() != null) {
			for(String r: token.getRoles()) {
				if(r.equals(role) == true) {
					return true;
				}
			}
		}
		
		return false;
	}
	
	
	

}