+++ /dev/null
-package org.apache.lucene.analysis.bg;
-
-/**
- * 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 java.io.File;
-import java.io.IOException;
-import java.io.Reader;
-import java.util.Set;
-
-import org.apache.lucene.analysis.Analyzer;
-import org.apache.lucene.analysis.LowerCaseFilter;
-import org.apache.lucene.analysis.CharArraySet;
-import org.apache.lucene.analysis.KeywordMarkerFilter;
-import org.apache.lucene.analysis.StopFilter;
-import org.apache.lucene.analysis.StopwordAnalyzerBase;
-import org.apache.lucene.analysis.TokenStream;
-import org.apache.lucene.analysis.Tokenizer;
-import org.apache.lucene.analysis.WordlistLoader;
-import org.apache.lucene.analysis.standard.StandardFilter;
-import org.apache.lucene.analysis.standard.StandardTokenizer;
-import org.apache.lucene.util.Version;
-
-/**
- * {@link Analyzer} for Bulgarian.
- * <p>
- * This analyzer implements light-stemming as specified by: <i> Searching
- * Strategies for the Bulgarian Language </i>
- * http://members.unine.ch/jacques.savoy/Papers/BUIR.pdf
- * <p>
- */
-public final class BulgarianAnalyzer extends StopwordAnalyzerBase {
-
- /**
- * File containing default Bulgarian stopwords.
- *
- * Default stopword list is from
- * http://members.unine.ch/jacques.savoy/clef/index.html The stopword list is
- * BSD-Licensed.
- */
- public final static String DEFAULT_STOPWORD_FILE = "stopwords.txt";
-
- /**
- * The comment character in the stopwords file. All lines prefixed with this
- * will be ignored
- * @deprecated use {@link WordlistLoader#getWordSet(File, String)} directly
- */
- //TODO make this private
- @Deprecated
- public static final String STOPWORDS_COMMENT = "#";
-
- /**
- * Returns an unmodifiable instance of the default stop-words set.
- *
- * @return an unmodifiable instance of the default stop-words set.
- */
- public static Set<?> getDefaultStopSet() {
- return DefaultSetHolder.DEFAULT_STOP_SET;
- }
-
- /**
- * Atomically loads the DEFAULT_STOP_SET in a lazy fashion once the outer
- * class accesses the static final set the first time.;
- */
- private static class DefaultSetHolder {
- static final Set<?> DEFAULT_STOP_SET;
-
- static {
- try {
- DEFAULT_STOP_SET = loadStopwordSet(false, BulgarianAnalyzer.class, DEFAULT_STOPWORD_FILE, STOPWORDS_COMMENT);
- } catch (IOException ex) {
- // default set should always be present as it is part of the
- // distribution (JAR)
- throw new RuntimeException("Unable to load default stopword set");
- }
- }
- }
-
- private final Set<?> stemExclusionSet;
-
- /**
- * Builds an analyzer with the default stop words:
- * {@link #DEFAULT_STOPWORD_FILE}.
- */
- public BulgarianAnalyzer(Version matchVersion) {
- this(matchVersion, DefaultSetHolder.DEFAULT_STOP_SET);
- }
-
- /**
- * Builds an analyzer with the given stop words.
- */
- public BulgarianAnalyzer(Version matchVersion, Set<?> stopwords) {
- this(matchVersion, stopwords, CharArraySet.EMPTY_SET);
- }
-
- /**
- * Builds an analyzer with the given stop words and a stem exclusion set.
- * If a stem exclusion set is provided this analyzer will add a {@link KeywordMarkerFilter}
- * before {@link BulgarianStemFilter}.
- */
- public BulgarianAnalyzer(Version matchVersion, Set<?> stopwords, Set<?> stemExclusionSet) {
- super(matchVersion, stopwords);
- this.stemExclusionSet = CharArraySet.unmodifiableSet(CharArraySet.copy(
- matchVersion, stemExclusionSet)); }
-
- /**
- * Creates a
- * {@link org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents}
- * which tokenizes all the text in the provided {@link Reader}.
- *
- * @return A
- * {@link org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents}
- * built from an {@link StandardTokenizer} filtered with
- * {@link StandardFilter}, {@link LowerCaseFilter}, {@link StopFilter}
- * , {@link KeywordMarkerFilter} if a stem exclusion set is
- * provided and {@link BulgarianStemFilter}.
- */
- @Override
- public TokenStreamComponents createComponents(String fieldName, Reader reader) {
- final Tokenizer source = new StandardTokenizer(matchVersion, reader);
- TokenStream result = new StandardFilter(matchVersion, source);
- result = new LowerCaseFilter(matchVersion, result);
- result = new StopFilter(matchVersion, result, stopwords);
- if(!stemExclusionSet.isEmpty())
- result = new KeywordMarkerFilter(result, stemExclusionSet);
- result = new BulgarianStemFilter(result);
- return new TokenStreamComponents(source, result);
- }
-}
fnp / pylucene.git / blobdiff