X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/ru/RussianAnalyzer.java
diff --git a/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/ru/RussianAnalyzer.java b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/ru/RussianAnalyzer.java
new file mode 100644
index 0000000..ecce222
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/ru/RussianAnalyzer.java
@@ -0,0 +1,195 @@
+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.IOUtils;
+import org.apache.lucene.util.Version;
+
+/**
+ * {@link Analyzer} for Russian language.
+ *
+ * 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.
+ *
+ *
+ * You must specify the required {@link Version}
+ * compatibility when creating RussianAnalyzer:
+ *
+ * - As of 3.1, StandardTokenizer is used, Snowball stemming is done with
+ * SnowballFilter, and Snowball stopwords are used by default.
+ *
+ */
+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", "бÑ", "бÑл", "бÑла", "бÑли", "бÑло", "бÑÑÑ", "в",
+ "вам", "ваÑ", "веÑÑ", "во", "воÑ", "вÑе", "вÑего", "вÑеÑ
", "вÑ", "где",
+ "да", "даже", "длÑ", "до", "его", "ее", "ей", "еÑ", "еÑли", "еÑÑÑ",
+ "еÑе", "же", "за", "здеÑÑ", "и", "из", "или", "им", "иÑ
", "к", "как",
+ "ко", "когда", "кÑо", "ли", "либо", "мне", "можеÑ", "мÑ", "на", "надо",
+ "наÑ", "не", "него", "нее", "неÑ", "ни", "ниÑ
", "но", "нÑ", "о", "об",
+ "однако", "он", "она", "они", "оно", "оÑ", "оÑенÑ", "по", "под", "пÑи",
+ "Ñ", "Ñо", "Ñак", "Ñакже", "Ñакой", "Ñам", "Ñе", "Ñем", "Ñо", "Ñого",
+ "Ñоже", "Ñой", "ÑолÑко", "Ñом", "ÑÑ", "Ñ", "Ñже", "Ñ
оÑÑ", "Ñего", "Ñей",
+ "Ñем", "ÑÑо", "ÑÑобÑ", "ÑÑе", "ÑÑÑ", "ÑÑа", "ÑÑи", "ÑÑо", "Ñ"
+ };
+
+ /** 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(IOUtils.getDecodingReader(SnowballFilter.class,
+ DEFAULT_STOPWORD_FILE, IOUtils.CHARSET_UTF_8), Version.LUCENE_CURRENT);
+ } 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", ex);
+ }
+ }
+ }
+
+ 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));
+ }
+ }
+}