opennlp.tools.chunker.ChunkerFactory 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.chunker;
import opennlp.tools.util.BaseToolFactory;
import opennlp.tools.util.InvalidFormatException;
import opennlp.tools.util.SequenceValidator;
import opennlp.tools.util.TokenTag;
import opennlp.tools.util.ext.ExtensionLoader;
public class ChunkerFactory extends BaseToolFactory {
/**
* Creates a {@link ChunkerFactory} that provides the default implementation
* of the resources.
*/
public ChunkerFactory() {
}
/**
* Instantiates a {@link ChunkerFactory} via a given {@code subclassName}.
*
* @param subclassName The class name used for instantiation. If {@code null}, an
* instance of {@link ChunkerFactory} will be returned
* per default. Otherwise, the {@link ExtensionLoader} mechanism
* is applied to load the requested {@code subclassName}.
*
* @return A valid {@link ChunkerFactory} instance.
* @throws InvalidFormatException Thrown if the {@link ExtensionLoader} mechanism failed to
* create the factory associated with {@code subclassName}.
*/
public static ChunkerFactory create(String subclassName)
throws InvalidFormatException {
if (subclassName == null) {
// will create the default factory
return new ChunkerFactory();
}
try {
return ExtensionLoader.instantiateExtension(ChunkerFactory.class, subclassName);
} catch (Exception e) {
String msg = "Could not instantiate the " + subclassName
+ ". The initialization threw an exception.";
throw new InvalidFormatException(msg, e);
}
}
@Override
public void validateArtifactMap() throws InvalidFormatException {
// no additional artifacts
}
public SequenceValidator getSequenceValidator() {
return new DefaultChunkerSequenceValidator();
}
public ChunkerContextGenerator getContextGenerator() {
return new DefaultChunkerContextGenerator();
}
}