+++ /dev/null
-package org.apache.lucene.analysis.br;
-
-/**
- * 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.Collections;
-import java.util.HashSet;
-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.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.StandardAnalyzer;
-import org.apache.lucene.analysis.standard.StandardFilter;
-import org.apache.lucene.analysis.standard.StandardTokenizer;
-import org.apache.lucene.util.Version;
-
-/**
- * {@link Analyzer} for Brazilian Portuguese language.
- * <p>
- * Supports an external list of stopwords (words that
- * will not be indexed at all) and an external list of exclusions (words that will
- * not be stemmed, but indexed).
- * </p>
- *
- * <p><b>NOTE</b>: This class uses the same {@link Version}
- * dependent settings as {@link StandardAnalyzer}.</p>
- */
-public final class BrazilianAnalyzer extends StopwordAnalyzerBase {
-
- /**
- * List of typical Brazilian Portuguese stopwords.
- * @deprecated use {@link #getDefaultStopSet()} instead
- */
- @Deprecated
- public final static String[] BRAZILIAN_STOP_WORDS = {
- "a","ainda","alem","ambas","ambos","antes",
- "ao","aonde","aos","apos","aquele","aqueles",
- "as","assim","com","como","contra","contudo",
- "cuja","cujas","cujo","cujos","da","das","de",
- "dela","dele","deles","demais","depois","desde",
- "desta","deste","dispoe","dispoem","diversa",
- "diversas","diversos","do","dos","durante","e",
- "ela","elas","ele","eles","em","entao","entre",
- "essa","essas","esse","esses","esta","estas",
- "este","estes","ha","isso","isto","logo","mais",
- "mas","mediante","menos","mesma","mesmas","mesmo",
- "mesmos","na","nas","nao","nas","nem","nesse","neste",
- "nos","o","os","ou","outra","outras","outro","outros",
- "pelas","pelas","pelo","pelos","perante","pois","por",
- "porque","portanto","proprio","propios","quais","qual",
- "qualquer","quando","quanto","que","quem","quer","se",
- "seja","sem","sendo","seu","seus","sob","sobre","sua",
- "suas","tal","tambem","teu","teus","toda","todas","todo",
- "todos","tua","tuas","tudo","um","uma","umas","uns"};
-
- /** File containing default Brazilian Portuguese stopwords. */
- public final static String DEFAULT_STOPWORD_FILE = "stopwords.txt";
-
- /**
- * 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;
- }
-
- private static class DefaultSetHolder {
- static final Set<?> DEFAULT_STOP_SET;
-
- static {
- try {
- DEFAULT_STOP_SET = CharArraySet.unmodifiableSet(new CharArraySet(
- Version.LUCENE_CURRENT, WordlistLoader.getWordSet(BrazilianAnalyzer.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 words that should be indexed but not stemmed.
- */
- // TODO make this private in 3.1
- private Set<?> excltable = Collections.emptySet();
-
- /**
- * Builds an analyzer with the default stop words ({@link #getDefaultStopSet()}).
- */
- public BrazilianAnalyzer(Version matchVersion) {
- this(matchVersion, DefaultSetHolder.DEFAULT_STOP_SET);
- }
-
- /**
- * Builds an analyzer with the given stop words
- *
- * @param matchVersion
- * lucene compatibility version
- * @param stopwords
- * a stopword set
- */
- public BrazilianAnalyzer(Version matchVersion, Set<?> stopwords) {
- super(matchVersion, stopwords);
- }
-
- /**
- * Builds an analyzer with the given stop words and stemming exclusion words
- *
- * @param matchVersion
- * lucene compatibility version
- * @param stopwords
- * a stopword set
- */
- public BrazilianAnalyzer(Version matchVersion, Set<?> stopwords,
- Set<?> stemExclusionSet) {
- this(matchVersion, stopwords);
- excltable = CharArraySet.unmodifiableSet(CharArraySet
- .copy(matchVersion, stemExclusionSet));
- }
-
- /**
- * Builds an analyzer with the given stop words.
- * @deprecated use {@link #BrazilianAnalyzer(Version, Set)} instead
- */
- @Deprecated
- public BrazilianAnalyzer(Version matchVersion, String... stopwords) {
- this(matchVersion, StopFilter.makeStopSet(matchVersion, stopwords));
- }
-
- /**
- * Builds an analyzer with the given stop words.
- * @deprecated use {@link #BrazilianAnalyzer(Version, Set)} instead
- */
- @Deprecated
- public BrazilianAnalyzer(Version matchVersion, Map<?,?> stopwords) {
- this(matchVersion, stopwords.keySet());
- }
-
- /**
- * Builds an analyzer with the given stop words.
- * @deprecated use {@link #BrazilianAnalyzer(Version, Set)} instead
- */
- @Deprecated
- public BrazilianAnalyzer(Version matchVersion, File stopwords)
- throws IOException {
- this(matchVersion, WordlistLoader.getWordSet(stopwords));
- }
-
- /**
- * Builds an exclusionlist from an array of Strings.
- * @deprecated use {@link #BrazilianAnalyzer(Version, Set, Set)} instead
- */
- @Deprecated
- public void setStemExclusionTable( String... exclusionlist ) {
- excltable = StopFilter.makeStopSet( matchVersion, exclusionlist );
- setPreviousTokenStream(null); // force a new stemmer to be created
- }
- /**
- * Builds an exclusionlist from a {@link Map}.
- * @deprecated use {@link #BrazilianAnalyzer(Version, Set, Set)} instead
- */
- @Deprecated
- public void setStemExclusionTable( Map<?,?> exclusionlist ) {
- excltable = new HashSet<Object>(exclusionlist.keySet());
- setPreviousTokenStream(null); // force a new stemmer to be created
- }
- /**
- * Builds an exclusionlist from the words contained in the given file.
- * @deprecated use {@link #BrazilianAnalyzer(Version, Set, Set)} instead
- */
- @Deprecated
- public void setStemExclusionTable( File exclusionlist ) throws IOException {
- excltable = WordlistLoader.getWordSet( exclusionlist );
- setPreviousTokenStream(null); // force a new stemmer to be created
- }
-
- /**
- * 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 LowerCaseFilter}, {@link StandardFilter}, {@link StopFilter}
- * , and {@link BrazilianStemFilter}.
- */
- @Override
- protected TokenStreamComponents createComponents(String fieldName,
- Reader reader) {
- Tokenizer source = new StandardTokenizer(matchVersion, reader);
- TokenStream result = new LowerCaseFilter(matchVersion, source);
- result = new StandardFilter(matchVersion, result);
- result = new StopFilter(matchVersion, result, stopwords);
- if(excltable != null && !excltable.isEmpty())
- result = new KeywordMarkerFilter(result, excltable);
- return new TokenStreamComponents(source, new BrazilianStemFilter(result));
- }
-}
-
fnp / pylucene.git / blobdiff