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* 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
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package org.apache.ctakes.relationextractor.ae.features;
import java.util.ArrayList;
import java.util.List;
import org.apache.ctakes.constituency.parser.treekernel.TreeExtractor;
import org.apache.ctakes.constituency.parser.util.AnnotationTreeUtils;
import org.apache.ctakes.typesystem.type.syntax.TopTreebankNode;
import org.apache.ctakes.typesystem.type.syntax.TreebankNode;
import org.apache.ctakes.typesystem.type.textsem.IdentifiedAnnotation;
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;
public class PETFeatureExtractor implements RelationFeaturesExtractor {
// Returns Path-enclosed trees of Moschitti 2004 (ACL)
@Override
public List<Feature> extract(JCas jcas, IdentifiedAnnotation arg1, IdentifiedAnnotation arg2) throws AnalysisEngineProcessException {
List<Feature> features = new ArrayList<Feature>();
// first get the root and print it out...
TopTreebankNode root = AnnotationTreeUtils.getTreeCopy(jcas, AnnotationTreeUtils.getAnnotationTree(jcas, arg1));
// SimpleTree tempClone = TreeExtractor.getSimpleClone(root);
// features.add(new Feature("TK_FULL", tempClone.toString()));
TreebankNode t1 = AnnotationTreeUtils.insertAnnotationNode(jcas, root, arg1, "ARG1");
TreebankNode t2 = AnnotationTreeUtils.insertAnnotationNode(jcas, root, arg2, "ARG2");
SimpleTree tree = null;
if(t1.getBegin() <= t2.getBegin() && t1.getEnd() >= t2.getEnd()){
// t1 encloses t2
tree = TreeExtractor.getSimpleClone(t1);
}else if(t2.getBegin() <= t1.getBegin() && t2.getEnd() >= t1.getEnd()){
// t2 encloses t1
tree = TreeExtractor.getSimpleClone(t2);
}else{
tree = TreeExtractor.extractPathEnclosedTree(t1, t2, jcas);
}
features.add(new Feature("TK_PET", tree.toString()));
return features;
}
}