| /* |
| * 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 org.apache.lucene.analysis.cjk; |
| |
| |
| import java.util.Map; |
| |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.util.TokenFilterFactory; |
| |
| /** |
| * Factory for {@link CJKBigramFilter}. |
| * <pre class="prettyprint"> |
| * <fieldType name="text_cjk" class="solr.TextField"> |
| * <analyzer> |
| * <tokenizer class="solr.StandardTokenizerFactory"/> |
| * <filter class="solr.CJKWidthFilterFactory"/> |
| * <filter class="solr.LowerCaseFilterFactory"/> |
| * <filter class="solr.CJKBigramFilterFactory" |
| * han="true" hiragana="true" |
| * katakana="true" hangul="true" outputUnigrams="false" /> |
| * </analyzer> |
| * </fieldType></pre> |
| * @since 3.6.0 |
| * @lucene.spi {@value #NAME} |
| */ |
| public class CJKBigramFilterFactory extends TokenFilterFactory { |
| |
| /** SPI name */ |
| public static final String NAME = "cjkBigram"; |
| |
| final int flags; |
| final boolean outputUnigrams; |
| |
| /** Creates a new CJKBigramFilterFactory */ |
| public CJKBigramFilterFactory(Map<String,String> args) { |
| super(args); |
| int flags = 0; |
| if (getBoolean(args, "han", true)) { |
| flags |= CJKBigramFilter.HAN; |
| } |
| if (getBoolean(args, "hiragana", true)) { |
| flags |= CJKBigramFilter.HIRAGANA; |
| } |
| if (getBoolean(args, "katakana", true)) { |
| flags |= CJKBigramFilter.KATAKANA; |
| } |
| if (getBoolean(args, "hangul", true)) { |
| flags |= CJKBigramFilter.HANGUL; |
| } |
| this.flags = flags; |
| this.outputUnigrams = getBoolean(args, "outputUnigrams", false); |
| if (!args.isEmpty()) { |
| throw new IllegalArgumentException("Unknown parameters: " + args); |
| } |
| } |
| |
| @Override |
| public TokenStream create(TokenStream input) { |
| return new CJKBigramFilter(input, flags, outputUnigrams); |
| } |
| } |