/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.stanbol.enhancer.engines.langdetect;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.io.IOUtils;
import com.cybozu.labs.langdetect.Detector;
import com.cybozu.labs.langdetect.DetectorFactory;
import com.cybozu.labs.langdetect.LangDetectException;
import com.cybozu.labs.langdetect.Language;
/**
* Standalone version of the Language Identifier
* @author <a href="mailto:kasper@dfki.de">Walter Kasper</a>
*
*/
public class LanguageIdentifier {
public LanguageIdentifier() throws LangDetectException {
DetectorFactory.clear();
try {
DetectorFactory.loadProfile(loadProfiles("profiles","profiles.cfg"));
} catch (Exception e) {
throw new LangDetectException(null, "Error in Initialization: "+e.getMessage());
}
}
/**
* Load the profiles from the classpath
* @param folder where the profiles are
* @param configFile specifies which language profiles should be used
* @return a list of profiles
* @throws Exception
*/
public List<String> loadProfiles(String folder, String configFile) throws Exception {
List<String> profiles = new ArrayList<String>();
java.util.Properties props = new java.util.Properties();
props.load(getClass().getClassLoader().getResourceAsStream(configFile));
String languages = props.getProperty("languages");
if (languages == null) {
throw new IOException("No languages defined");
}
for (String lang: languages.split(",")) {
String profileFile = folder+"/"+lang;
InputStream is = getClass().getClassLoader().getResourceAsStream(profileFile);
try {
String profile = IOUtils.toString(is, "UTF-8");
if (profile != null && profile.length() > 0) {
profiles.add(profile);
}
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return profiles;
}
public String getLanguage(String text) throws LangDetectException {
Detector detector = DetectorFactory.create();
detector.append(text);
return detector.detect();
}
public ArrayList<Language> getLanguages(String text) throws LangDetectException {
Detector detector = DetectorFactory.create();
detector.append(text);
return detector.getProbabilities();
}
}