Java tutorial
/** * Copyright (c) 2010 Enric Ruiz, Ignasi Barrera * * 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 com.rhymestore.twitter.util; import twitter4j.HttpResponseCode; import twitter4j.TwitterException; /** * Utility methods to work with the Twitter API. * * @author Ignasi Barrera */ public class TwitterUtils { /** Maximum length for the tweets. */ public static final int MAX_TWEET_LENGTH = 140; /** The rate limit time window in minutes. */ public static final int RATE_LIMIT_WINDOW_MINUTES = 15; /** Number of APi calls allowed in the rate limit window. */ public static final int RATE_LIMIT_API_CALLS_IN_WINDOW = 15; /** The error produced when attempting to send duplicate tweets. */ public static final String DUPLICATE_TWEET_ERROR = "Status is a duplicate."; /** * Returns a valid tweet for the given sentence. * * @param sentence The sentence to tweet. * @return The valid tweet. */ public static String tweet(final String sentence) { return sentence.length() > MAX_TWEET_LENGTH ? sentence.substring(0, MAX_TWEET_LENGTH - 3) + "..." : sentence; } /** * Builds a reply to the given user. * * @param user The user to reply. * @param tweet The tweet to send. * @return The reply tweet. */ public static String reply(final String user, final String tweet) { return tweet("." + user(user) + " " + tweet); } /** * Builds Twitter user name. * * @param user The user name. * @return The Twitter user name. */ public static String user(final String user) { return user.startsWith("@") ? user : "@" + user; } /** * Checks if the exception cause is a duplicate tweet. * * @param ex The exception to check. * @return Boolean indicating if the exception cause is a duplicate tweet. */ public static boolean isDuplicateTweetError(final TwitterException ex) { return ex.getStatusCode() == HttpResponseCode.FORBIDDEN && ex.getMessage().contains(DUPLICATE_TWEET_ERROR); } }