/**
* 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.treekernel;
import java.util.ArrayList;
import java.util.List;
import org.apache.ctakes.relationextractor.ae.features.RelationFeaturesExtractor;
import org.apache.ctakes.typesystem.type.syntax.BaseToken;
import org.apache.ctakes.typesystem.type.textsem.EventMention;
import org.apache.ctakes.typesystem.type.textsem.IdentifiedAnnotation;
import org.apache.ctakes.typesystem.type.textsem.TimeMention;
import org.apache.ctakes.utils.tree.SimpleTree;
import org.apache.uima.analysis_engine.AnalysisEngineProcessException;
import org.apache.uima.jcas.JCas;
import org.cleartk.classifier.Feature;
import org.cleartk.classifier.TreeFeature;
import org.uimafit.util.JCasUtil;
import com.google.common.base.Function;
public class EventTimeFlatTreeFeatureExtractor implements RelationFeaturesExtractor{
@Override
public List<Feature> extract(JCas jcas, IdentifiedAnnotation arg1,
IdentifiedAnnotation arg2) throws AnalysisEngineProcessException {
List<Feature> feats = new ArrayList<Feature>();
// make sure they're in the correct order
if(arg1.getBegin() > arg2.getBegin()){
IdentifiedAnnotation temp = arg1;
arg1 = arg2;
arg2 = temp;
}
SimpleTree bopTree = getTree(jcas, arg1, arg2, "BOP", new Function<BaseToken,String>(){public String apply(BaseToken t){ return t.getPartOfSpeech();}});
SimpleTree bowTree = getTree(jcas, arg1, arg2, "BOW", new Function<BaseToken,String>(){public String apply(BaseToken t){ return t.getCoveredText();}});
feats.add(new TreeFeature("TK_BOP_Tree", bopTree.toString()));
feats.add(new TreeFeature("TK_BOW_Tree", bowTree.toString()));
return feats;
}
private static SimpleTree getTree(JCas jcas, IdentifiedAnnotation arg1, IdentifiedAnnotation arg2, String label, Function<BaseToken, String> leafFun) throws AnalysisEngineProcessException{
SimpleTree tree = new SimpleTree(label);
SimpleTree arg1Tree = null;
SimpleTree arg2Tree = null;
String eventModality="";
String timeClass="";
// make sure we have the right classes
if(arg1 instanceof EventMention){
EventMention mention = (EventMention) arg1;
if(mention.getEvent() != null && mention.getEvent().getProperties() != null){
eventModality = mention.getEvent().getProperties().getContextualModality();
}
arg1Tree = new SimpleTree("EVENT-"+eventModality);
}else if(arg1 instanceof TimeMention){
timeClass = ((TimeMention)arg1).getTimeClass();
arg1Tree = new SimpleTree("TIMEX-"+timeClass);
}else{
throw new AnalysisEngineProcessException("Argument type not recognized (arg1) -- must be EventMention or TimeMention", null);
}
if(arg2 instanceof EventMention){
EventMention mention = (EventMention) arg2;
if(mention.getEvent() != null && mention.getEvent().getProperties() != null){
eventModality = mention.getEvent().getProperties().getContextualModality();
}
arg2Tree = new SimpleTree("EVENT-"+eventModality);
}else if(arg2 instanceof TimeMention){
timeClass = ((TimeMention)arg2).getTimeClass();
arg2Tree = new SimpleTree("TIMEX-"+timeClass);
}else{
throw new AnalysisEngineProcessException("Argument type not recognized (arg2) -- must be EventMention or TimeMention", null);
}
List<BaseToken> tokens = JCasUtil.selectCovered(jcas, BaseToken.class, arg1.getBegin(), arg2.getEnd());
tree.addChild(arg1Tree);
for(BaseToken token : tokens){
SimpleTree tokenTree = new SimpleTree("TOK");
tokenTree.addChild(new SimpleTree(leafFun.apply(token)));
if(token.getEnd() <= arg1.getEnd()){
arg1Tree.addChild(tokenTree);
}else if(token.getBegin() >= arg2.getBegin()){
arg2Tree.addChild(tokenTree);
}else{
tree.addChild(tokenTree);
}
}
tree.addChild(arg2Tree);
return tree;
}
}