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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 "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  org.cleartk.ml.Feature;
import  org.cleartk.ml.TreeFeature;
import  org.cleartk.ml.feature.extractor.CleartkExtractorException;
import  org.cleartk.ml.feature.extractor.FeatureExtractor1;
Given a focused annotation, get the whole sentence-level parse tree that cover this annotation.

Author(s):
CH151862
public class SyntaticSingleTreeExtractor implements FeatureExtractor1 {
	public static final String FEAT_NAME = "TK_SingleT";
	public List<Feature> extract(JCas viewAnnotation focusAnnotation)
			throws CleartkExtractorException {
		List<Feature> features = new ArrayList<Feature>();
		// first get the root and print it out...
		TopTreebankNode root = AnnotationTreeUtils.getTreeCopy(view, AnnotationTreeUtils.getAnnotationTree(viewfocusAnnotation));
		if(root == null){
			SimpleTree fakeTree = new SimpleTree("(S (NN null))");
			features.add(new TreeFeature(fakeTree.toString()));
			return features;
		}
		String etype="";
		String eventModality="";
		if(focusAnnotation instanceof EventMention){
			eventModality = ((EventMention)focusAnnotation).getEvent().getProperties().getContextualModality();
			etype = "EVENT-"+eventModality;
			AnnotationTreeUtils.insertAnnotationNode(viewrootfocusAnnotationetype);
		}
		SimpleTree tree = null;
		tree = TreeExtractor.getSimpleClone(root);
		TemporalPETExtractor.moveTimexDownToNP(tree);
		features.add(new TreeFeature(tree.toString()));
		return features;
	}
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