jp.xxxxxxxx.l3fish.twnyaan.service.UserService.java Source code

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Here is the source code for jp.xxxxxxxx.l3fish.twnyaan.service.UserService.java

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/*
 * The MIT License
 *
 * Copyright 2016 sashimi.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package jp.xxxxxxxx.l3fish.twnyaan.service;

import com.google.inject.Singleton;
import jp.xxxxxxxx.l3fish.twnyaan.config.ErrorCode;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.User;

/**
 * ??????
 * 
 * @author sashimi
 */
@Singleton
public class UserService {

    /**
     * ????
     * ??????????????{@code null}?
     * 
     * @return ??????????{@code null}
     */
    public User getUser() {
        Twitter twitter = TwitterFactory.getSingleton();

        User user = null;
        try {
            user = twitter.verifyCredentials();
        } catch (IllegalStateException e) {
            System.err.println(ErrorCode.MISSING_AUTHENTICATION_CREDENTIALS);
        } catch (TwitterException e) {
            if (e.getStatusCode() == 401) {
                System.err.println(ErrorCode.UNAUTHORIZED);
            } else {
                System.err.println(ErrorCode.TWITTER_SERVICE_UNAVAILABLE);
            }
        }

        return user;
    }
}