+++ /dev/null
-package org.apache.lucene.analysis.ru;
-
-/**
- * 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.IOException;
-import java.io.Reader;
-import java.util.Arrays;
-import java.util.Map;
-import java.util.Set;
-
-import org.apache.lucene.analysis.Analyzer;
-import org.apache.lucene.analysis.CharArraySet;
-import org.apache.lucene.analysis.LowerCaseFilter;
-import org.apache.lucene.analysis.snowball.SnowballFilter;
-import org.apache.lucene.analysis.standard.StandardFilter;
-import org.apache.lucene.analysis.standard.StandardTokenizer;
-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.util.Version;
-
-/**
- * {@link Analyzer} for Russian language.
- * <p>
- * Supports an external list of stopwords (words that
- * will not be indexed at all).
- * A default set of stopwords is used unless an alternative list is specified.
- * </p>
- * <a name="version"/>
- * <p>You must specify the required {@link Version}
- * compatibility when creating RussianAnalyzer:
- * <ul>
- * <li> As of 3.1, StandardTokenizer is used, Snowball stemming is done with
- * SnowballFilter, and Snowball stopwords are used by default.
- * </ul>
- */
-public final class RussianAnalyzer extends StopwordAnalyzerBase
-{
- /**
- * List of typical Russian stopwords. (for backwards compatibility)
- * @deprecated Remove this for LUCENE 5.0
- */
- @Deprecated
- private static final String[] RUSSIAN_STOP_WORDS_30 = {
- "а", "без", "более", "бы", "был", "была", "были", "было", "быть", "в",
- "вам", "вас", "весь", "во", "вот", "все", "всего", "всех", "вы", "где",
- "да", "даже", "для", "до", "его", "ее", "ей", "ею", "если", "есть",
- "еще", "же", "за", "здесь", "и", "из", "или", "им", "их", "к", "как",
- "ко", "когда", "кто", "ли", "либо", "мне", "может", "мы", "на", "надо",
- "наш", "не", "него", "нее", "нет", "ни", "них", "но", "ну", "о", "об",
- "однако", "он", "она", "они", "оно", "от", "очень", "по", "под", "при",
- "с", "со", "так", "также", "такой", "там", "те", "тем", "то", "того",
- "тоже", "той", "только", "том", "ты", "у", "уже", "хотя", "чего", "чей",
- "чем", "что", "чтобы", "чье", "чья", "эта", "эти", "это", "я"
- };
-
- /** File containing default Russian stopwords. */
- public final static String DEFAULT_STOPWORD_FILE = "russian_stop.txt";
-
- private static class DefaultSetHolder {
- /** @deprecated remove this for Lucene 5.0 */
- @Deprecated
- static final Set<?> DEFAULT_STOP_SET_30 = CharArraySet
- .unmodifiableSet(new CharArraySet(Version.LUCENE_CURRENT,
- Arrays.asList(RUSSIAN_STOP_WORDS_30), false));
- static final Set<?> DEFAULT_STOP_SET;
-
- static {
- try {
- DEFAULT_STOP_SET =
- WordlistLoader.getSnowballWordSet(SnowballFilter.class, DEFAULT_STOPWORD_FILE);
- } 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;
-
- /**
- * 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;
- }
-
- public RussianAnalyzer(Version matchVersion) {
- this(matchVersion,
- matchVersion.onOrAfter(Version.LUCENE_31) ? DefaultSetHolder.DEFAULT_STOP_SET
- : DefaultSetHolder.DEFAULT_STOP_SET_30);
- }
-
- /**
- * Builds an analyzer with the given stop words.
- * @deprecated use {@link #RussianAnalyzer(Version, Set)} instead
- */
- @Deprecated
- public RussianAnalyzer(Version matchVersion, String... stopwords) {
- this(matchVersion, StopFilter.makeStopSet(matchVersion, stopwords));
- }
-
- /**
- * Builds an analyzer with the given stop words
- *
- * @param matchVersion
- * lucene compatibility version
- * @param stopwords
- * a stopword set
- */
- public RussianAnalyzer(Version matchVersion, Set<?> stopwords){
- this(matchVersion, stopwords, CharArraySet.EMPTY_SET);
- }
-
- /**
- * Builds an analyzer with the given stop words
- *
- * @param matchVersion
- * lucene compatibility version
- * @param stopwords
- * a stopword set
- * @param stemExclusionSet a set of words not to be stemmed
- */
- public RussianAnalyzer(Version matchVersion, Set<?> stopwords, Set<?> stemExclusionSet){
- super(matchVersion, stopwords);
- this.stemExclusionSet = CharArraySet.unmodifiableSet(CharArraySet.copy(matchVersion, stemExclusionSet));
- }
-
-
- /**
- * Builds an analyzer with the given stop words.
- * TODO: create a Set version of this ctor
- * @deprecated use {@link #RussianAnalyzer(Version, Set)} instead
- */
- @Deprecated
- public RussianAnalyzer(Version matchVersion, Map<?,?> stopwords)
- {
- this(matchVersion, stopwords.keySet());
- }
-
- /**
- * Creates
- * {@link org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents}
- * used to tokenize all the text in the provided {@link Reader}.
- *
- * @return {@link org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents}
- * built from a {@link StandardTokenizer} filtered with
- * {@link StandardFilter}, {@link LowerCaseFilter}, {@link StopFilter}
- * , {@link KeywordMarkerFilter} if a stem exclusion set is
- * provided, and {@link SnowballFilter}
- */
- @Override
- protected TokenStreamComponents createComponents(String fieldName,
- Reader reader) {
- if (matchVersion.onOrAfter(Version.LUCENE_31)) {
- 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 SnowballFilter(result, new org.tartarus.snowball.ext.RussianStemmer());
- return new TokenStreamComponents(source, result);
- } else {
- final Tokenizer source = new RussianLetterTokenizer(matchVersion, reader);
- TokenStream result = new LowerCaseFilter(matchVersion, source);
- result = new StopFilter(matchVersion, result, stopwords);
- if (!stemExclusionSet.isEmpty()) result = new KeywordMarkerFilter(
- result, stemExclusionSet);
- return new TokenStreamComponents(source, new RussianStemFilter(result));
- }
- }
-}
fnp / pylucene.git / blobdiff