+++ /dev/null
-package org.apache.lucene.analysis.cz;
-
-/**
- * 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 org.apache.lucene.analysis.ReusableAnalyzerBase;
-import org.apache.lucene.analysis.Analyzer;
-import org.apache.lucene.analysis.CharArraySet;
-import org.apache.lucene.analysis.KeywordMarkerFilter;
-import org.apache.lucene.analysis.LowerCaseFilter;
-import org.apache.lucene.analysis.StopFilter;
-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;
-
-import java.io.*;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Set;
-
-/**
- * {@link Analyzer} for Czech 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
- * CzechAnalyzer:
- * <ul>
- * <li>As of 3.1, words are stemmed with {@link CzechStemFilter}
- * <li>As of 2.9, StopFilter preserves position increments
- * <li>As of 2.4, Tokens incorrectly identified as acronyms are corrected (see
- * <a href="https://issues.apache.org/jira/browse/LUCENE-1068">LUCENE-1068</a>)
- * </ul>
- */
-public final class CzechAnalyzer extends ReusableAnalyzerBase {
-
- /**
- * List of typical stopwords.
- * @deprecated use {@link #getDefaultStopSet()} instead
- */
- @Deprecated
- public final static String[] CZECH_STOP_WORDS = {
- "a","s","k","o","i","u","v","z","dnes","cz","t\u00edmto","bude\u0161","budem",
- "byli","jse\u0161","m\u016fj","sv\u00fdm","ta","tomto","tohle","tuto","tyto",
- "jej","zda","pro\u010d","m\u00e1te","tato","kam","tohoto","kdo","kte\u0159\u00ed",
- "mi","n\u00e1m","tom","tomuto","m\u00edt","nic","proto","kterou","byla",
- "toho","proto\u017ee","asi","ho","na\u0161i","napi\u0161te","re","co\u017e","t\u00edm",
- "tak\u017ee","sv\u00fdch","jej\u00ed","sv\u00fdmi","jste","aj","tu","tedy","teto",
- "bylo","kde","ke","prav\u00e9","ji","nad","nejsou","\u010di","pod","t\u00e9ma",
- "mezi","p\u0159es","ty","pak","v\u00e1m","ani","kdy\u017e","v\u0161ak","neg","jsem",
- "tento","\u010dl\u00e1nku","\u010dl\u00e1nky","aby","jsme","p\u0159ed","pta","jejich",
- "byl","je\u0161t\u011b","a\u017e","bez","tak\u00e9","pouze","prvn\u00ed","va\u0161e","kter\u00e1",
- "n\u00e1s","nov\u00fd","tipy","pokud","m\u016f\u017ee","strana","jeho","sv\u00e9","jin\u00e9",
- "zpr\u00e1vy","nov\u00e9","nen\u00ed","v\u00e1s","jen","podle","zde","u\u017e","b\u00fdt","v\u00edce",
- "bude","ji\u017e","ne\u017e","kter\u00fd","by","kter\u00e9","co","nebo","ten","tak",
- "m\u00e1","p\u0159i","od","po","jsou","jak","dal\u0161\u00ed","ale","si","se","ve",
- "to","jako","za","zp\u011bt","ze","do","pro","je","na","atd","atp",
- "jakmile","p\u0159i\u010dem\u017e","j\u00e1","on","ona","ono","oni","ony","my","vy",
- "j\u00ed","ji","m\u011b","mne","jemu","tomu","t\u011bm","t\u011bmu","n\u011bmu","n\u011bmu\u017e",
- "jeho\u017e","j\u00ed\u017e","jeliko\u017e","je\u017e","jako\u017e","na\u010de\u017e",
- };
-
- /** File containing default Czech stopwords. */
- public final static String DEFAULT_STOPWORD_FILE = "stopwords.txt";
-
- /**
- * Returns a set of default Czech-stopwords
- *
- * @return a set of default Czech-stopwords
- */
- public static final Set<?> getDefaultStopSet(){
- return DefaultSetHolder.DEFAULT_SET;
- }
-
- private static class DefaultSetHolder {
- private static final Set<?> DEFAULT_SET;
-
- static {
- try {
- DEFAULT_SET = CharArraySet.unmodifiableSet(new CharArraySet(
- Version.LUCENE_CURRENT, WordlistLoader.getWordSet(CzechAnalyzer.class,
- DEFAULT_STOPWORD_FILE, "#"), false));
- } 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");
- }
- }
- }
-
-
- /**
- * Contains the stopwords used with the {@link StopFilter}.
- */
- // TODO once loadStopWords is gone those member should be removed too in favor of StopwordAnalyzerBase
- private Set<?> stoptable;
- private final Version matchVersion;
- private final Set<?> stemExclusionTable;
-
- /**
- * Builds an analyzer with the default stop words ({@link #getDefaultStopSet()}).
- *
- * @param matchVersion Lucene version to match See
- * {@link <a href="#version">above</a>}
- */
- public CzechAnalyzer(Version matchVersion) {
- this(matchVersion, DefaultSetHolder.DEFAULT_SET);
- }
-
- /**
- * Builds an analyzer with the given stop words.
- *
- * @param matchVersion Lucene version to match See
- * {@link <a href="#version">above</a>}
- * @param stopwords a stopword set
- */
- public CzechAnalyzer(Version matchVersion, Set<?> stopwords) {
- this(matchVersion, stopwords, CharArraySet.EMPTY_SET);
- }
-
- /**
- * Builds an analyzer with the given stop words and a set of work to be
- * excluded from the {@link CzechStemFilter}.
- *
- * @param matchVersion Lucene version to match See
- * {@link <a href="#version">above</a>}
- * @param stopwords a stopword set
- * @param stemExclusionTable a stemming exclusion set
- */
- public CzechAnalyzer(Version matchVersion, Set<?> stopwords, Set<?> stemExclusionTable) {
- this.matchVersion = matchVersion;
- this.stoptable = CharArraySet.unmodifiableSet(CharArraySet.copy(matchVersion, stopwords));
- this.stemExclusionTable = CharArraySet.unmodifiableSet(CharArraySet.copy(matchVersion, stemExclusionTable));
- }
-
-
- /**
- * Builds an analyzer with the given stop words.
- *
- * @param matchVersion Lucene version to match See
- * {@link <a href="#version">above</a>}
- * @param stopwords a stopword set
- * @deprecated use {@link #CzechAnalyzer(Version, Set)} instead
- */
- @Deprecated
- public CzechAnalyzer(Version matchVersion, String... stopwords) {
- this(matchVersion, StopFilter.makeStopSet( matchVersion, stopwords ));
- }
-
- /**
- * Builds an analyzer with the given stop words.
- *
- * @param matchVersion Lucene version to match See
- * {@link <a href="#version">above</a>}
- * @param stopwords a stopword set
- * @deprecated use {@link #CzechAnalyzer(Version, Set)} instead
- */
- @Deprecated
- public CzechAnalyzer(Version matchVersion, HashSet<?> stopwords) {
- this(matchVersion, (Set<?>)stopwords);
- }
-
- /**
- * Builds an analyzer with the given stop words.
- *
- * @param matchVersion Lucene version to match See
- * {@link <a href="#version">above</a>}
- * @param stopwords a file containing stopwords
- * @deprecated use {@link #CzechAnalyzer(Version, Set)} instead
- */
- @Deprecated
- public CzechAnalyzer(Version matchVersion, File stopwords ) throws IOException {
- this(matchVersion, (Set<?>)WordlistLoader.getWordSet( stopwords ));
- }
-
- /**
- * Loads stopwords hash from resource stream (file, database...).
- * @param wordfile File containing the wordlist
- * @param encoding Encoding used (win-1250, iso-8859-2, ...), null for default system encoding
- * @deprecated use {@link WordlistLoader#getWordSet(Reader, String) }
- * and {@link #CzechAnalyzer(Version, Set)} instead
- */
- // TODO extend StopwordAnalyzerBase once this method is gone!
- @Deprecated
- public void loadStopWords( InputStream wordfile, String encoding ) {
- setPreviousTokenStream(null); // force a new stopfilter to be created
- if ( wordfile == null ) {
- stoptable = Collections.emptySet();
- return;
- }
- try {
- // clear any previous table (if present)
- stoptable = Collections.emptySet();
-
- InputStreamReader isr;
- if (encoding == null)
- isr = new InputStreamReader(wordfile);
- else
- isr = new InputStreamReader(wordfile, encoding);
-
- stoptable = WordlistLoader.getWordSet(isr);
- } catch ( IOException e ) {
- // clear any previous table (if present)
- // TODO: throw IOException
- stoptable = Collections.emptySet();
- }
- }
-
- /**
- * 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}
- * , and {@link CzechStemFilter} (only if version is >= LUCENE_31). If
- * a version is >= LUCENE_31 and a stem exclusion set is provided via
- * {@link #CzechAnalyzer(Version, Set, Set)} a
- * {@link KeywordMarkerFilter} is added before
- * {@link CzechStemFilter}.
- */
- @Override
- protected 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, stoptable);
- if (matchVersion.onOrAfter(Version.LUCENE_31)) {
- if(!this.stemExclusionTable.isEmpty())
- result = new KeywordMarkerFilter(result, stemExclusionTable);
- result = new CzechStemFilter(result);
- }
- return new TokenStreamComponents(source, result);
- }
-}
-
fnp / pylucene.git / blobdiff