001/** 002 * Copyright (c) 2011, The University of Southampton and the individual contributors. 003 * All rights reserved. 004 * 005 * Redistribution and use in source and binary forms, with or without modification, 006 * are permitted provided that the following conditions are met: 007 * 008 * * Redistributions of source code must retain the above copyright notice, 009 * this list of conditions and the following disclaimer. 010 * 011 * * Redistributions in binary form must reproduce the above copyright notice, 012 * this list of conditions and the following disclaimer in the documentation 013 * and/or other materials provided with the distribution. 014 * 015 * * Neither the name of the University of Southampton nor the names of its 016 * contributors may be used to endorse or promote products derived from this 017 * software without specific prior written permission. 018 * 019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 029 */ 030package org.openimaj.demos.twitter; 031 032import java.util.ArrayList; 033import java.util.HashSet; 034import java.util.List; 035 036import org.openimaj.util.data.Context; 037import org.openimaj.util.function.MultiFunction; 038import twitter4j.HashtagEntity; 039import twitter4j.Status; 040 041public class HashTagMatch implements MultiFunction<Status, Context> { 042 043 public static final String HASHTAG_KEY = "hastagmatch.hashtag"; 044 private String[] hashtags; 045 private HashSet<String> hashes = new HashSet<String>(); 046 047 public HashTagMatch(String[] hashtags) { 048 this.hashtags = hashtags; 049 for (String string : hashtags) { 050 hashes .add(string); 051 } 052 } 053 @Override 054 public List<Context> apply(Status in) { 055 HashtagEntity[] tags = in.getHashtagEntities(); 056 List<Context> ret = new ArrayList<Context>(); 057 for (HashtagEntity hashtagEntity : tags) { 058 String withHash = "#" + hashtagEntity.getText(); 059 060 if(hashes.contains(withHash)){ 061 Context ctx = new Context(); 062 ctx.put(HASHTAG_KEY, withHash); 063 ctx.put("status", in); 064 ret.add(ctx); 065 } 066 } 067 return ret; 068 } 069 070}