| /* |
| * 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.lucene.analysis.pattern; |
| |
| import java.util.Arrays; |
| import java.util.Map; |
| import java.util.regex.Pattern; |
| import org.apache.lucene.analysis.TokenFilterFactory; |
| import org.apache.lucene.analysis.TokenStream; |
| |
| /** |
| * 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 |
| * @since 3.1 |
| * @lucene.spi {@value #NAME} |
| */ |
| public class PatternReplaceFilterFactory extends TokenFilterFactory { |
| |
| /** SPI name */ |
| public static final String NAME = "patternReplace"; |
| |
| final Pattern pattern; |
| final String replacement; |
| final boolean replaceAll; |
| |
| /** Creates a new PatternReplaceFilterFactory */ |
| public PatternReplaceFilterFactory(Map<String, String> args) { |
| super(args); |
| pattern = getPattern(args, "pattern"); |
| replacement = get(args, "replacement"); |
| replaceAll = "all".equals(get(args, "replace", Arrays.asList("all", "first"), "all")); |
| if (!args.isEmpty()) { |
| throw new IllegalArgumentException("Unknown parameters: " + args); |
| } |
| } |
| |
| /** Default ctor for compatibility with SPI */ |
| public PatternReplaceFilterFactory() { |
| throw defaultCtorException(); |
| } |
| |
| @Override |
| public PatternReplaceFilter create(TokenStream input) { |
| return new PatternReplaceFilter(input, pattern, replacement, replaceAll); |
| } |
| } |