| /* |
| * 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.jackrabbit.oak.plugins.index.lucene.util; |
| |
| import java.io.Reader; |
| import java.util.Arrays; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.Tokenizer; |
| import org.apache.lucene.analysis.util.CharFilterFactory; |
| import org.apache.lucene.analysis.util.TokenFilterFactory; |
| import org.apache.lucene.analysis.util.TokenizerFactory; |
| |
| /** |
| * An analyzer that uses a tokenizer and a list of token filters to |
| * create a TokenStream. Taken from org.apache.solr.analysis.TokenizerChain |
| */ |
| public final class TokenizerChain extends Analyzer { |
| private final CharFilterFactory[] charFilters; |
| private final TokenizerFactory tokenizer; |
| private final TokenFilterFactory[] filters; |
| |
| public TokenizerChain(TokenizerFactory tokenizer) { |
| this(null, tokenizer, null); |
| } |
| |
| public TokenizerChain(TokenizerFactory tokenizer, TokenFilterFactory[] filters) { |
| this(null, tokenizer, filters); |
| } |
| |
| public TokenizerChain(CharFilterFactory[] charFilters, TokenizerFactory tokenizer, TokenFilterFactory[] filters) { |
| this.charFilters = charFilters; |
| this.tokenizer = tokenizer; |
| this.filters = filters == null ? new TokenFilterFactory[0] : filters; |
| } |
| |
| @Override |
| public Reader initReader(String fieldName, Reader reader) { |
| if (charFilters != null && charFilters.length > 0) { |
| Reader cs = reader; |
| for (CharFilterFactory charFilter : charFilters) { |
| cs = charFilter.create(cs); |
| } |
| reader = cs; |
| } |
| return reader; |
| } |
| |
| //Mostly required for testing purpose |
| |
| public CharFilterFactory[] getCharFilters() { |
| return Arrays.copyOf(charFilters, charFilters.length); |
| } |
| |
| public TokenizerFactory getTokenizer() { |
| return tokenizer; |
| } |
| |
| public TokenFilterFactory[] getFilters() { |
| return Arrays.copyOf(filters, filters.length); |
| } |
| |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName, Reader reader) { |
| Tokenizer tk = tokenizer.create(reader); |
| TokenStream ts = tk; |
| for (TokenFilterFactory filter : filters) { |
| ts = filter.create(ts); |
| } |
| return new TokenStreamComponents(tk, ts); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder("TokenizerChain("); |
| for (CharFilterFactory filter : charFilters) { |
| sb.append(filter); |
| sb.append(", "); |
| } |
| sb.append(tokenizer); |
| for (TokenFilterFactory filter : filters) { |
| sb.append(", "); |
| sb.append(filter); |
| } |
| sb.append(')'); |
| return sb.toString(); |
| } |
| |
| } |