001/** 
002 * Copyright (c) 2010, Regents of the University of Colorado 
003 * All rights reserved.
004 * 
005 * Redistribution and use in source and binary forms, with or without
006 * modification, are permitted provided that the following conditions are met:
007 * 
008 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 
009 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 
010 * Neither the name of the University of Colorado at Boulder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 
011 * 
012 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
013 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
014 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
015 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
016 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
017 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
018 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
019 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
020 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
021 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
022 * POSSIBILITY OF SUCH DAMAGE. 
023 */
024package org.cleartk.timeml.event;
025
026import org.apache.uima.UimaContext;
027import org.apache.uima.analysis_engine.AnalysisEngineDescription;
028import org.apache.uima.resource.ResourceInitializationException;
029import org.cleartk.ml.feature.extractor.CleartkExtractor;
030import org.cleartk.ml.feature.extractor.TypePathExtractor;
031import org.cleartk.ml.feature.extractor.CleartkExtractor.Bag;
032import org.cleartk.ml.feature.extractor.CleartkExtractor.Covered;
033import org.cleartk.ml.feature.extractor.CleartkExtractor.Preceding;
034import org.cleartk.ml.liblinear.LibLinearStringOutcomeDataWriter;
035import org.cleartk.timeml.type.Event;
036import org.cleartk.timeml.util.CleartkInternalModelFactory;
037import org.cleartk.feature.TextSliceExtractor;
038import org.cleartk.feature.token.TokenTextForSelectedPosExtractor;
039import org.cleartk.token.type.Token;
040import org.apache.uima.fit.factory.AnalysisEngineFactory;
041
042/**
043 * <br>
044 * Copyright (c) 2010, Regents of the University of Colorado <br>
045 * All rights reserved.
046 * 
047 * Annotator for the "tense" attribute of TimeML EVENTs.
048 * 
049 * @author Steven Bethard
050 */
051public class EventTenseAnnotator extends EventAttributeAnnotator<String> {
052
053  public static final CleartkInternalModelFactory FACTORY = new CleartkInternalModelFactory() {
054    @Override
055    public Class<?> getAnnotatorClass() {
056      return EventTenseAnnotator.class;
057    }
058
059    @Override
060    public Class<?> getDataWriterClass() {
061      return LibLinearStringOutcomeDataWriter.class;
062    }
063
064    @Override
065    public AnalysisEngineDescription getBaseDescription() throws ResourceInitializationException {
066      return AnalysisEngineFactory.createEngineDescription(EventTenseAnnotator.class);
067    }
068  };
069
070  @Override
071  public void initialize(UimaContext context) throws ResourceInitializationException {
072    super.initialize(context);
073    this.eventFeatureExtractors.add(new TextSliceExtractor<Event>(-2));
074    this.eventFeatureExtractors.add(new CleartkExtractor<Event, Token>(Token.class, new TypePathExtractor<Token>(
075        Token.class,
076        "pos"), new Bag(new Covered())));
077
078    this.contextExtractors.add(new CleartkExtractor<Event, Token>(
079        Token.class,
080        new TokenTextForSelectedPosExtractor("MD", "TO", "IN", "VB"),
081        new Preceding(3)));
082  }
083
084  @Override
085  protected String getDefaultValue() {
086    return "NONE";
087  }
088
089  @Override
090  protected String getAttribute(Event event) {
091    return event.getTense();
092  }
093
094  @Override
095  protected void setAttribute(Event event, String value) {
096    event.setTense(value);
097  }
098}