001/** 002 * Copyright (c) 2012, 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.tools.twitter.modes.filter; 031 032import java.io.IOException; 033import java.util.ArrayList; 034import java.util.List; 035import java.util.Map; 036 037import org.kohsuke.args4j.Option; 038import org.openimaj.text.nlp.language.LanguageDetector.WeightedLocale; 039import org.openimaj.tools.twitter.modes.preprocessing.LanguageDetectionMode; 040import org.openimaj.tools.twitter.modes.preprocessing.TwitterPreprocessingMode; 041import org.openimaj.twitter.USMFStatus; 042 043public class LanguageFilter extends TwitterPreprocessingPredicate { 044 045 @Option(name="--accept-language", aliases="-l", required=false, usage="Using detected language, accept these languages", metaVar="STRING", multiValued=true) 046 List<String> localeMatch = new ArrayList<String>(); 047 048 private LanguageDetectionMode langMode; 049 050 051 /** 052 * @param languages 053 */ 054 public LanguageFilter(String ... languages) { 055 for (String string : languages) { 056 localeMatch.add(string); 057 } 058 } 059 060 @Override 061 public boolean test(USMFStatus twitterStatus) { 062 try { 063 Map<String,Object> localeMap = TwitterPreprocessingMode.results(twitterStatus,langMode); 064 WeightedLocale locale = WeightedLocale.fromMap(localeMap); 065 for (String lang : this.localeMatch) { 066 if(locale.language.equals(lang)) return true; 067 } 068 069 return false; 070 } catch (Exception e) { 071 return false; 072 } 073 } 074 075 @Override 076 public void validate() { 077 try { 078 this.langMode = new LanguageDetectionMode(); 079 } catch (IOException e) { 080 } 081 } 082 083}