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* Licensed to the Apache Software Foundation (ASF) under one
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* 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.treekernel;
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.relationextractor.ae.features.RelationFeaturesExtractor;
import org.apache.ctakes.typesystem.type.syntax.TopTreebankNode;
import org.apache.ctakes.typesystem.type.syntax.TreebankNode;
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;
public class TemporalPETExtractor implements RelationFeaturesExtractor {
@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));
if(root == null){
SimpleTree fakeTree = new SimpleTree("(S (NN null))");
features.add(new TreeFeature("TK_PET", fakeTree.toString()));
return features;
}
// swap the order if necessary:
if(arg2.getBegin() <= arg1.getBegin() && arg2.getEnd() <= arg1.getEnd()){
IdentifiedAnnotation temp = arg1;
arg1 = arg2;
arg2 = temp;
}
String a1type="", a2type="";
String eventModality="";
String timeClass;
if(arg1 instanceof EventMention){
EventMention mention = (EventMention) arg1;
if(mention.getEvent() != null && mention.getEvent().getProperties() != null){
eventModality = mention.getEvent().getProperties().getContextualModality();
}
a1type = "EVENT-"+eventModality;
}else if(arg1 instanceof TimeMention){
timeClass = ((TimeMention)arg1).getTimeClass();
a1type = "TIMEX-"+timeClass;
}
if(arg2 instanceof EventMention){
EventMention mention = (EventMention) arg2;
if(mention.getEvent() != null && mention.getEvent().getProperties() != null){
eventModality = mention.getEvent().getProperties().getContextualModality();
}
a2type = "EVENT-"+eventModality;
}else if(arg2 instanceof TimeMention){
timeClass = ((TimeMention)arg2).getTimeClass();
a2type = "TIMEX-"+timeClass;
}
TreebankNode t1 = AnnotationTreeUtils.insertAnnotationNode(jcas, root, arg1, "ARG1-"+a1type);
TreebankNode t2 = AnnotationTreeUtils.insertAnnotationNode(jcas, root, arg2, "ARG2-"+a2type);
// addOtherTimes(jcas,root, arg1, 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);
}
tree.setGeneralizeLeaf(true);
moveTimexDownToNP(tree);
simplifyGCG(tree);
features.add(new TreeFeature("TK_PET", tree.toString()));
return features;
}
public static void addOtherTimes(JCas jcas, TopTreebankNode root, IdentifiedAnnotation arg1, IdentifiedAnnotation arg2) {
List<TimeMention> timexes = JCasUtil.selectCovered(TimeMention.class, root);
for(TimeMention timex : timexes){
// don't want the same timex that we are looking at the argument for...
if(timex.getBegin() == arg1.getBegin() && timex.getEnd() == arg1.getEnd() ||
timex.getBegin() == arg2.getBegin() && timex.getEnd() == arg2.getEnd()) continue;
// but make sure it is in the correct span...
if(timex.getBegin() > arg1.getBegin() && timex.getEnd() <= arg2.getBegin()){
AnnotationTreeUtils.insertAnnotationNode(jcas, root, timex, "TIMEX");
}
}
}
public static void moveTimexDownToNP(SimpleTree tree) {
if(tree.cat.contains("-TIMEX-")){
SimpleTree child = tree.children.get(0);
// we've found the correct node: only correct clear violations: PP -> IN NP
if(child.cat.contains("PP") && child.children.size() == 2 && child.children.get(0).cat.equals("IN") && child.children.get(1).cat.startsWith("NP")){
// swap labels
String fullCat = tree.cat;
tree.cat = "PP";
child.cat = fullCat;
// now point the new PP at the preposition and stop the new TIMEX from pointing at it:
tree.children.add(0, child.children.get(0));
child.children.remove(0);
}
return;
}else if(tree.children == null || tree.children.size() == 0){
return;
}
// if we are not there we have to return
for(SimpleTree child : tree.children){
moveTimexDownToNP(child);
}
}
public static void simplifyGCG(SimpleTree tree){
if(tree.children == null || tree.children.size() == 0) return;
int ampInd = tree.cat.indexOf('+');
if(ampInd > 0){
tree.cat = tree.cat.substring(0, ampInd);
}
for(SimpleTree child : tree.children){
simplifyGCG(child);
}
}
}