realmisuserexists.java

一个实用工具类

/*
 * Copyright (C) butor.com. All rights reserved.
 *
 * This software is published under the terms of the GNU Library General
 * Public License (GNU LGPL), a copy of which has been included with this
 * distribution in the LICENSE.txt file. 
 */


package org.butor.realm.service;

import org.butor.bls.IOutputResponse;
import org.butor.bls.IRequest;
import org.butor.bls.Service;
import org.butor.bls.ServiceException;
import org.butor.dataStruct.Message;
import org.butor.realm.RealmService;
import org.butor.realm.service.bean.RealmIsUserExistsParam;

/**
 * TODO
 * 
 * @author sawanai
 * Jul 5, 2004
 */
public class RealmIsUserExists extends Service {

	/**
	 * 
	 */
	public RealmIsUserExists() {
		super(RealmIsUserExistsParam.SERVICE_NAME);
	}

	public String getDescription() {
		return "Check if user exists.";
	}
	
	/**
	 * ParamBean class
	 * @see org.butor.bls.IService#getParamBeanClass()
	 */
	public Class getServiceParamBeanClass() {
		return RealmIsUserExistsParam.class;
	}

	public IOutputResponse execute(IRequest request) throws ServiceException {
		IOutputResponse response = request.createResponse();
		RealmIsUserExistsParam params = (RealmIsUserExistsParam) getServiceParamBean(request);

		String userid = (params.getUserid() == null ? null : params.getUserid().trim()); 										
		if (userid == null || userid.length() == 0) {
			response.addMessage(new Message(1000, Message.ERROR, "Missing param userid!"));
			response.endResponse(1000);
			return response;
		}
		
		int stat = 0;
		String message = "";
		
		if (RealmService.isUserExists(userid)) {
			stat = 0;											
			message = "Exists";
			
		} else {
			stat = -1; //TODO retstat FAILED
			message = "Does not exists";
		}
		
		response.addMessage(new Message(stat, Message.INFO, message));
			
		response.endResponse(stat);
		
		return response;
	}
}