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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;
import  org.cleartk.ml.Feature;
public class EventTimeRelationsFeaturesExtractor implements
  /*
   * (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 uses existing event-time relations as features, e.g., for an event-event classifier downstream
   * At this point, it only does narrative container-based features -- arg1 is in a narrative contrainer, arg2 is in a narrative container 
   */
  public List<Feature> extract(JCas jCasIdentifiedAnnotation arg1,
    List<Feature> feats = Lists.newArrayList();
    
    for(BinaryTextRelation etc : JCasUtil.select(jCasBinaryTextRelation.class)){
      Annotation etcA1 = etc.getArg1().getArgument();
      Annotation etcA2 = etc.getArg2().getArgument();
      if(etcA1 instanceof TimeMention || etcA2 instanceof TimeMention){
        if(etc.getCategory().equalsIgnoreCase("CONTAINS")){
          if(etcA1.getBegin() == arg1.getBegin() && etcA1.getEnd() == arg1.getEnd() ||
              etcA2.getBegin() == arg1.getBegin() && etcA2.getEnd() == arg1.getEnd()){
            feats.add(new Feature("ARG1_IN_NC"));
          }
          if(etcA1.getBegin() == arg2.getBegin() && etcA1.getEnd() == arg2.getEnd() ||
              etcA2.getBegin() == arg2.getBegin() && etcA2.getEnd() == arg2.getEnd()){
            feats.add(new Feature("ARG2_IN_NC"));
          }
        }
      }
    }
    
    return feats;
  }
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