/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.elasticsearch.index.analysis;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.pattern.PatternTokenizer;
import org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.ElasticSearchIllegalStateException;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.assistedinject.Assisted;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.settings.IndexSettings;
import java.io.IOException;
import java.io.Reader;
import java.util.regex.Pattern;
public class PatternTokenizerFactory extends AbstractTokenizerFactory {
private final Pattern pattern;
private final int group;
@Inject public PatternTokenizerFactory(Index index, @IndexSettings Settings indexSettings, @Assisted String name, @Assisted Settings settings) {
super(index, indexSettings, name, settings);
String sPattern = settings.get("pattern", "\\W+" /*PatternAnalyzer.NON_WORD_PATTERN*/);
if (sPattern == null) {
throw new ElasticSearchIllegalArgumentException("pattern is missing for [" + name + "] tokenizer of type 'pattern'");
}
this.pattern = Regex.compile(sPattern, settings.get("flags"));
this.group = settings.getAsInt("group", -1);
}
@Override public Tokenizer create(Reader reader) {
try {
return new PatternTokenizer(reader, pattern, group);
} catch (IOException e) {
throw new ElasticSearchIllegalStateException("failed to create pattern tokenizer", e);
}
}
}