/**
* 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.util.ArrayList;
import java.util.List;
import org.apache.ctakes.constituency.parser.util.AnnotationTreeUtils;
import org.apache.ctakes.relationextractor.ae.features.RelationFeaturesExtractor;
import org.apache.ctakes.typesystem.type.syntax.TreebankNode;
import org.apache.ctakes.typesystem.type.textsem.IdentifiedAnnotation;
import org.apache.uima.analysis_engine.AnalysisEngineProcessException;
import org.apache.uima.jcas.JCas;
import org.cleartk.classifier.Feature;
public class ParseFeatureExtractor implements RelationFeaturesExtractor {
/*
* (non-Javadoc)
* @see org.apache.ctakes.relationextractor.ae.features.RelationFeaturesExtractor#extract(org.apache.uima.jcas.JCas, org.apache.ctakes.typesystem.type.textsem.IdentifiedAnnotation, org.apache.ctakes.typesystem.type.textsem.IdentifiedAnnotation)
* This feature extractor finds the lowest dominating phrase category of each
* argument, then specifies if one dominates t'other.
*/
@Override
public List<Feature> extract(JCas jCas, IdentifiedAnnotation arg1,
IdentifiedAnnotation arg2) throws AnalysisEngineProcessException {
List<Feature> features = new ArrayList<Feature>();
TreebankNode tree1 = AnnotationTreeUtils.annotationNode(jCas, arg1);
TreebankNode tree2 = AnnotationTreeUtils.annotationNode(jCas, arg2);
TreebankNode phrase1 = tree1;
TreebankNode phrase2 = tree2;
while(phrase1.getParent() != null){
phrase1 = phrase1.getParent();
if(phrase1.getNodeType().endsWith("P")) break;
}
while(phrase2.getParent() != null){
phrase2 = phrase2.getParent();
if(phrase2.getNodeType().endsWith("P")) break;
}
if(phrase1.getBegin() <= phrase2.getBegin() && phrase1.getEnd() >= phrase2.getEnd()){
features.add(new Feature("Arg1DominatesArg2"));
}else if(phrase2.getBegin() <= phrase1.getBegin() && phrase2.getEnd() >= phrase1.getEnd()){
features.add(new Feature("Arg2DominatesArg1"));
}
// TreebankNode lca = AnnotationTreeUtils.getCommonAncestor(tree1, tree2);
// features.add(new Feature("LCA", lca));
return features;
}
}