| /* |
| * 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.lang.jpn; |
| |
| import java.util.List; |
| |
| import opennlp.tools.util.StringUtil; |
| import opennlp.tools.util.featuregen.AdaptiveFeatureGenerator; |
| |
| |
| /** |
| * Generates features for different for the class of the token. |
| */ |
| public class TokenClassFeatureGenerator implements AdaptiveFeatureGenerator { |
| |
| private static final String TOKEN_CLASS_PREFIX = "wc"; |
| private static final String TOKEN_AND_CLASS_PREFIX = "w&c"; |
| |
| private boolean generateWordAndClassFeature; |
| |
| public TokenClassFeatureGenerator() { |
| this(false); |
| } |
| |
| public TokenClassFeatureGenerator(boolean generateWordAndClassFeature) { |
| this.generateWordAndClassFeature = generateWordAndClassFeature; |
| } |
| |
| public void createFeatures(List<String> features, String[] tokens, int index, String[] preds) { |
| String wordClass = FeatureGeneratorUtil.tokenFeature(tokens[index]); |
| features.add(TOKEN_CLASS_PREFIX + "=" + wordClass); |
| |
| if (generateWordAndClassFeature) { |
| features.add(TOKEN_AND_CLASS_PREFIX + "=" + StringUtil.toLowerCase(tokens[index]) + |
| "," + wordClass); |
| } |
| } |
| } |