/**
* 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.ctakes.temporal.ae.feature;
import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.apache.uima.jcas.JCas;
import org.apache.uima.jcas.tcas.Annotation;
import org.apache.uima.resource.ResourceInitializationException;
import org.cleartk.classifier.Feature;
import org.cleartk.classifier.feature.extractor.CleartkExtractorException;
import org.cleartk.classifier.feature.extractor.simple.SimpleFeatureExtractor;
import org.cleartk.timeml.util.TimeWordsExtractor;
import com.google.common.base.Charsets;
import com.google.common.collect.Maps;
import com.google.common.io.Resources;
public class TimeWordTypeExtractor implements SimpleFeatureExtractor {
private static final String FEATURE_NAME = "TimeWordType";
private static final String LOOKUP_PATH = "/org/apache/ctakes/temporal/time_word_types.txt";
private Map<String, String> wordTypes;
public TimeWordTypeExtractor() throws ResourceInitializationException {
this.wordTypes = Maps.newHashMap();
URL url = TimeWordsExtractor.class.getResource(LOOKUP_PATH);
try {
for (String line : Resources.readLines(url, Charsets.US_ASCII)) {
String[] typeAndWord = line.split("\\s+");
if (typeAndWord.length != 2) {
throw new IllegalArgumentException("Expected '<type> <word>', found: " + line);
}
this.wordTypes.put(typeAndWord[1], typeAndWord[0]);
}
} catch (IOException e) {
throw new ResourceInitializationException(e);
}
}
@Override
public List<Feature> extract(JCas view, Annotation focusAnnotation)
throws CleartkExtractorException {
String type = this.wordTypes.get(focusAnnotation.getCoveredText().toLowerCase());
List<Feature> features;
if (type == null) {
features = Collections.emptyList();
} else {
features = Collections.singletonList(new Feature(FEATURE_NAME, type));
}
return features;
}
}