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https://github.com/scm-manager/scm-manager.git
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53 lines
2.5 KiB
Java
53 lines
2.5 KiB
Java
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/*
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* MIT License
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*
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* Copyright (c) 2020-present Cloudogu GmbH and Contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package sonia.scm.search;
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import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.analysis.LowerCaseFilter;
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import org.apache.lucene.analysis.TokenStream;
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import org.apache.lucene.analysis.miscellaneous.WordDelimiterGraphFilter;
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import org.apache.lucene.analysis.standard.StandardTokenizer;
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import static org.apache.lucene.analysis.miscellaneous.WordDelimiterGraphFilter.GENERATE_NUMBER_PARTS;
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import static org.apache.lucene.analysis.miscellaneous.WordDelimiterGraphFilter.GENERATE_WORD_PARTS;
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import static org.apache.lucene.analysis.miscellaneous.WordDelimiterGraphFilter.PRESERVE_ORIGINAL;
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import static org.apache.lucene.analysis.miscellaneous.WordDelimiterGraphFilter.SPLIT_ON_CASE_CHANGE;
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import static org.apache.lucene.analysis.miscellaneous.WordDelimiterGraphFilter.SPLIT_ON_NUMERICS;
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public class NonNaturalLanguageAnalyzer extends Analyzer {
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@Override
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protected TokenStreamComponents createComponents(String fieldName) {
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StandardTokenizer tokenizer = new StandardTokenizer();
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TokenStream stream = new WordDelimiterGraphFilter(
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tokenizer,
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GENERATE_WORD_PARTS | GENERATE_NUMBER_PARTS | SPLIT_ON_CASE_CHANGE | SPLIT_ON_NUMERICS | PRESERVE_ORIGINAL,
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null // list of words which are protected from being delimited
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);
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stream = new LowerCaseFilter(stream);
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return new TokenStreamComponents(tokenizer, stream);
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}
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}
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