package org.apache.lucene.analysis.pattern;
/*
* 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.
*/
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.pattern.PatternReplaceFilter;
import org.apache.lucene.analysis.util.TokenFilterFactory;
import java.util.Map;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/**
* Factory for {@link PatternReplaceFilter}.
* <pre class="prettyprint" >
* <fieldType name="text_ptnreplace" class="solr.TextField" positionIncrementGap="100">
* <analyzer>
* <tokenizer class="solr.KeywordTokenizerFactory"/>
* <filter class="solr.PatternReplaceFilterFactory" pattern="([^a-z])" replacement=""
* replace="all"/>
* </analyzer>
* </fieldType></pre>
*
* @see PatternReplaceFilter
*/
public class PatternReplaceFilterFactory extends TokenFilterFactory {
Pattern p;
String replacement;
boolean all = true;
@Override
public void init(Map<String, String> args) {
super.init(args);
p = getPattern("pattern");
replacement = args.get("replacement");
String r = args.get("replace");
if (null != r) {
if (r.equals("all")) {
all = true;
} else {
if (r.equals("first")) {
all = false;
} else {
throw new IllegalArgumentException
("Configuration Error: 'replace' must be 'first' or 'all' in "
+ this.getClass().getName());
}
}
}
}
@Override
public PatternReplaceFilter create(TokenStream input) {
return new PatternReplaceFilter(input, p, replacement, all);
}
}