opennlp.tools.coref.resolver.DefiniteNounResolver Maven / Gradle / Ivy
/*
* 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 definite noun-phrases.
*/
public class DefiniteNounResolver extends MaxentResolver {
public DefiniteNounResolver(String projectName, ResolverMode m) throws IOException {
super(projectName, "defmodel", m, 80);
//preferFirstReferent = true;
}
public DefiniteNounResolver(String projectName, ResolverMode m, NonReferentialResolver nrr) throws IOException {
super(projectName, "defmodel", m, 80,nrr);
//preferFirstReferent = true;
}
public boolean canResolve(MentionContext mention) {
Object[] mtokens = mention.getTokens();
String firstTok = mention.getFirstTokenText().toLowerCase();
boolean rv = mtokens.length > 1 && !mention.getHeadTokenTag().startsWith("NNP") && ResolverUtils.definiteArticle(firstTok, mention.getFirstTokenTag());
//if (rv) {
// System.err.println("defNp "+ec);
//}
return (rv);
}
protected List getFeatures(MentionContext mention, DiscourseEntity entity) {
List features = new ArrayList();
features.addAll(super.getFeatures(mention, entity));
if (entity != null) {
features.addAll(ResolverUtils.getContextFeatures(mention));
features.addAll(ResolverUtils.getStringMatchFeatures(mention,entity));
features.addAll(ResolverUtils.getDistanceFeatures(mention,entity));
}
return (features);
}
}