opennlp.tools.util.featuregen.BrownClusterTokenClassFeatureGeneratorFactory 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.util.featuregen;
import java.util.HashMap;
import java.util.Map;
import opennlp.tools.util.InvalidFormatException;
import opennlp.tools.util.model.ArtifactSerializer;
/**
* Generates Brown clustering features for token classes.
*/
public class BrownClusterTokenClassFeatureGeneratorFactory
extends GeneratorFactory.AbstractXmlFeatureGeneratorFactory {
public BrownClusterTokenClassFeatureGeneratorFactory() {
super();
}
@Override
public AdaptiveFeatureGenerator create() throws InvalidFormatException {
// if resourceManager is null, we don't instantiate
if (resourceManager == null) {
return null;
}
String dictResourceKey = getStr("dict");
Object dictResource = resourceManager.getResource(dictResourceKey);
if (!(dictResource instanceof BrownCluster)) {
throw new InvalidFormatException("Not a BrownLexicon resource for key: " + dictResourceKey);
}
return new BrownTokenClassFeatureGenerator((BrownCluster) dictResource);
}
@Override
public Map> getArtifactSerializerMapping() throws InvalidFormatException {
Map> mapping = new HashMap<>();
mapping.put(getStr("dict"), new BrownCluster.BrownClusterSerializer());
return mapping;
}
}