org.elasticsearch.index.analysis.compound.HyphenationCompoundWordTokenFilterFactory Maven / Gradle / Ivy
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.index.analysis.compound;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.compound.HyphenationCompoundWordTokenFilter;
import org.apache.lucene.analysis.compound.hyphenation.HyphenationTree;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.assistedinject.Assisted;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.analysis.AnalysisSettingsRequired;
import org.elasticsearch.index.settings.IndexSettings;
import org.xml.sax.InputSource;
import java.net.URL;
/**
* Uses the {@link org.apache.lucene.analysis.compound.HyphenationCompoundWordTokenFilter} to decompound tokens based on hyphenation rules.
*
* @see org.apache.lucene.analysis.compound.HyphenationCompoundWordTokenFilter
*/
@AnalysisSettingsRequired
public class HyphenationCompoundWordTokenFilterFactory extends AbstractCompoundWordTokenFilterFactory {
private final HyphenationTree hyphenationTree;
@Inject
public HyphenationCompoundWordTokenFilterFactory(Index index, @IndexSettings Settings indexSettings, Environment env, @Assisted String name, @Assisted Settings settings) {
super(index, indexSettings, env, name, settings);
String hyphenationPatternsPath = settings.get("hyphenation_patterns_path", null);
if (hyphenationPatternsPath == null) {
throw new ElasticsearchIllegalArgumentException("hyphenation_patterns_path is a required setting.");
}
URL hyphenationPatternsFile = env.resolveConfig(hyphenationPatternsPath);
try {
hyphenationTree = HyphenationCompoundWordTokenFilter.getHyphenationTree(new InputSource(hyphenationPatternsFile.toExternalForm()));
} catch (Exception e) {
throw new ElasticsearchIllegalArgumentException("Exception while reading hyphenation_patterns_path: " + e.getMessage());
}
}
@Override
public TokenStream create(TokenStream tokenStream) {
return new HyphenationCompoundWordTokenFilter(version, tokenStream,
hyphenationTree, wordList,
minWordSize, minSubwordSize, maxSubwordSize, onlyLongestMatch);
}
}