/*
* 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 opennlp.tools.coref.resolver;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import opennlp.tools.coref.DiscourseEntity;
import opennlp.tools.coref.mention.MentionContext;
/**
* Resolves coreference between plural nouns.
*/
public class PluralNounResolver extends MaxentResolver {
public PluralNounResolver(String projectName, ResolverMode m) throws IOException {
super(projectName,"plmodel", m, 80, true);
showExclusions = false;
}
public PluralNounResolver(String projectName, ResolverMode m, NonReferentialResolver nrr) throws IOException {
super(projectName,"plmodel", m, 80, true,nrr);
showExclusions = false;
}
@Override
protected List<String> getFeatures(MentionContext mention, DiscourseEntity entity) {
List<String> features = new ArrayList<String>();
features.addAll(super.getFeatures(mention, entity));
if (entity != null) {
features.addAll(ResolverUtils.getContextFeatures(mention));
features.addAll(ResolverUtils.getStringMatchFeatures(mention,entity));
}
return features;
}
public boolean canResolve(MentionContext mention) {
String firstTok = mention.getFirstTokenText().toLowerCase();
String firstTokTag = mention.getFirstToken().getSyntacticType();
boolean rv = mention.getHeadTokenTag().equals("NNS") && !ResolverUtils.definiteArticle(firstTok, firstTokTag);
return rv;
}
@Override
protected boolean excluded(MentionContext mention, DiscourseEntity entity) {
if (super.excluded(mention,entity)) {
return true;
}
else {
MentionContext cec = entity.getLastExtent();
return (!cec.getHeadTokenTag().equals("NNS") || super.excluded(mention, entity));
}
}
}