/**
* 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();
}
}