/**
* 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
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package org.apache.ctakes.temporal.ae.feature;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import org.apache.ctakes.relationextractor.ae.features.RelationFeaturesExtractor;
import org.apache.ctakes.typesystem.type.syntax.WordToken;
import org.apache.ctakes.typesystem.type.textsem.EventMention;
import org.apache.ctakes.typesystem.type.textsem.IdentifiedAnnotation;
import org.apache.ctakes.typesystem.type.textspan.Sentence;
import org.apache.uima.analysis_engine.AnalysisEngineProcessException;
import org.apache.uima.jcas.JCas;
import org.cleartk.classifier.Feature;
import org.uimafit.util.JCasUtil;
public class NearbyVerbTenseRelationExtractor implements RelationFeaturesExtractor{
@Override
public List<Feature> extract(JCas jcas, IdentifiedAnnotation arg1,
IdentifiedAnnotation arg2) throws AnalysisEngineProcessException {
List<Feature> feats = new ArrayList<Feature>();
//find event
EventMention event = null;
if(arg1 instanceof EventMention){
event = (EventMention) arg1;
}else if(arg1 instanceof EventMention){
event = (EventMention) arg2;
}else{
return feats;
}
//1 get covering sentence:
Map<EventMention, Collection<Sentence>> coveringMap =
JCasUtil.indexCovering(jcas, EventMention.class, Sentence.class);
Collection<Sentence> sentList = coveringMap.get(event);
//2 get Verb Tense
if (sentList != null && !sentList.isEmpty()){
for(Sentence sent : sentList) {
String verbTP ="";
for ( WordToken wt : JCasUtil.selectCovered(jcas, WordToken.class, sent)) {
if (wt != null){
String pos = wt.getPartOfSpeech();
if (pos.startsWith("VB")){
verbTP = verbTP + "_" + pos;
}
}
}
Feature feature = new Feature("VerbTenseFeature", verbTP);
feats.add(feature);
//logger.info("found nearby verb's pos tag: "+ verbTP);
}
}
return feats;
}
}