33 lines
1.0 KiB
Java
33 lines
1.0 KiB
Java
package it.cavallium.dbengine.database.analyzer;
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import it.cavallium.dbengine.database.LuceneUtils;
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import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.analysis.TokenStream;
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import org.apache.lucene.analysis.Tokenizer;
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import org.apache.lucene.analysis.core.KeywordTokenizer;
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import org.apache.lucene.analysis.ngram.EdgeNGramTokenFilter;
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public class N4CharGramEdgeAnalyzer extends Analyzer {
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public N4CharGramEdgeAnalyzer() {
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}
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@Override
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protected TokenStreamComponents createComponents(final String fieldName) {
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Tokenizer tokenizer = new KeywordTokenizer();
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TokenStream tokenStream = tokenizer;
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tokenStream = LuceneUtils.newCommonFilter(tokenStream, false);
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tokenStream = new EdgeNGramTokenFilter(tokenStream, 4, 4, false);
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return new TokenStreamComponents(tokenizer, tokenStream);
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}
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@Override
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protected TokenStream normalize(String fieldName, TokenStream in) {
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TokenStream tokenStream = in;
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tokenStream = LuceneUtils.newCommonNormalizer(tokenStream);
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return tokenStream;
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}
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}
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