opennlp.tools.doccat.NGramFeatureGenerator Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreemnets. 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.doccat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
public class NGramFeatureGenerator implements FeatureGenerator {
public Collection extractFeatures(String[] text) {
List features = new ArrayList();
for (int i = 0; i < text.length - 1; i++) {
features.add(text[i] + " " + text[i + 1]);
}
return features;
}
}