content: /**
   * 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.solr.analysis;
  
  import org.apache.lucene.analysis.TokenStream;
  import org.apache.lucene.analysis.CharStream;
  import org.apache.lucene.analysis.CharReader;
  import org.apache.lucene.analysis.Tokenizer;
  
  import java.io.Reader;
  
  /**
   * @version $Id: TokenizerChain.java 1065312 2011-01-30 16:08:25Z rmuir $
   */
  
  //
  // An analyzer that uses a tokenizer and a list of token filters to
  // create a TokenStream.
  //
  public final class TokenizerChain extends SolrAnalyzer {
    final private CharFilterFactory[] charFilters;
    final private TokenizerFactory tokenizer;
    final private TokenFilterFactory[] filters;
  
    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;
    }
  
    public CharFilterFactory[] getCharFilterFactories() { return charFilters; }
    public TokenizerFactory getTokenizerFactory() { return tokenizer; }
    public TokenFilterFactory[] getTokenFilterFactories() { return filters; }
  
    @Override
    public Reader charStream(Reader reader){
      if( charFilters != null && charFilters.length > 0 ){
        CharStream cs = CharReader.get( reader );
        for (int i=0; i<charFilters.length; i++) {
          cs = charFilters[i].create(cs);
        }
        reader = cs;
      }
      return reader;
    }
  
    @Override
    public TokenStreamInfo getStream(String fieldName, Reader reader) {
      Tokenizer tk = tokenizer.create(charStream(reader));
      TokenStream ts = tk;
      for (int i=0; i<filters.length; i++) {
        ts = filters[i].create(ts);
      }
      return new TokenStreamInfo(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();
    }
  
  }
  