+++ /dev/null
-package org.apache.lucene.analysis.fr;
-
-/**
- * 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.util.Set;
-import java.util.Arrays;
-import org.apache.lucene.analysis.standard.StandardTokenizer; // for javadocs
-import org.apache.lucene.analysis.CharArraySet;
-import org.apache.lucene.analysis.TokenStream;
-import org.apache.lucene.analysis.TokenFilter;
-import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
-import org.apache.lucene.util.Version;
-
-/**
- * Removes elisions from a {@link TokenStream}. For example, "l'avion" (the plane) will be
- * tokenized as "avion" (plane).
- *
- * @see <a href="http://fr.wikipedia.org/wiki/%C3%89lision">Elision in Wikipedia</a>
- */
-public final class ElisionFilter extends TokenFilter {
- private CharArraySet articles = CharArraySet.EMPTY_SET;
- private final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
- private static final CharArraySet DEFAULT_ARTICLES = CharArraySet.unmodifiableSet(
- new CharArraySet(Version.LUCENE_CURRENT, Arrays.asList(
- "l", "m", "t", "qu", "n", "s", "j"), true));
-
- private static char[] apostrophes = {'\'', '\u2019'};
-
- /**
- * Set the stopword articles
- * @param matchVersion the lucene backwards compatibility version
- * @param articles a set of articles
- * @deprecated use {@link #ElisionFilter(Version, TokenStream, Set)} instead
- */
- @Deprecated
- public void setArticles(Version matchVersion, Set<?> articles) {
- this.articles = CharArraySet.unmodifiableSet(
- CharArraySet.copy(matchVersion, articles));
- }
-
- /**
- * Set the stopword articles
- * @param articles a set of articles
- * @deprecated use {@link #setArticles(Version, Set)} instead
- */
- @Deprecated
- public void setArticles(Set<?> articles) {
- setArticles(Version.LUCENE_CURRENT, articles);
- }
- /**
- * Constructs an elision filter with standard stop words
- */
- public ElisionFilter(Version matchVersion, TokenStream input) {
- this(matchVersion, input, DEFAULT_ARTICLES);
- }
-
- /**
- * Constructs an elision filter with standard stop words
- * @deprecated use {@link #ElisionFilter(Version, TokenStream)} instead
- */
- @Deprecated
- public ElisionFilter(TokenStream input) {
- this(Version.LUCENE_30, input);
- }
-
- /**
- * Constructs an elision filter with a Set of stop words
- * @deprecated use {@link #ElisionFilter(Version, TokenStream, Set)} instead
- */
- @Deprecated
- public ElisionFilter(TokenStream input, Set<?> articles) {
- this(Version.LUCENE_30, input, articles);
- }
-
- /**
- * Constructs an elision filter with a Set of stop words
- * @param matchVersion the lucene backwards compatibility version
- * @param input the source {@link TokenStream}
- * @param articles a set of stopword articles
- */
- public ElisionFilter(Version matchVersion, TokenStream input, Set<?> articles) {
- super(input);
- this.articles = CharArraySet.unmodifiableSet(
- new CharArraySet(matchVersion, articles, true));
- }
-
- /**
- * Constructs an elision filter with an array of stop words
- * @deprecated use {@link #ElisionFilter(Version, TokenStream, Set)} instead
- */
- @Deprecated
- public ElisionFilter(TokenStream input, String[] articles) {
- this(Version.LUCENE_CURRENT, input,
- new CharArraySet(Version.LUCENE_CURRENT,
- Arrays.asList(articles), true));
- }
-
- /**
- * Increments the {@link TokenStream} with a {@link CharTermAttribute} without elisioned start
- */
- @Override
- public final boolean incrementToken() throws IOException {
- if (input.incrementToken()) {
- char[] termBuffer = termAtt.buffer();
- int termLength = termAtt.length();
-
- int minPoz = Integer.MAX_VALUE;
- for (int i = 0; i < apostrophes.length; i++) {
- char apos = apostrophes[i];
- // The equivalent of String.indexOf(ch)
- for (int poz = 0; poz < termLength ; poz++) {
- if (termBuffer[poz] == apos) {
- minPoz = Math.min(poz, minPoz);
- break;
- }
- }
- }
-
- // An apostrophe has been found. If the prefix is an article strip it off.
- if (minPoz != Integer.MAX_VALUE
- && articles.contains(termAtt.buffer(), 0, minPoz)) {
- termAtt.copyBuffer(termAtt.buffer(), minPoz + 1, termAtt.length() - (minPoz + 1));
- }
-
- return true;
- } else {
- return false;
- }
- }
-}
fnp / pylucene.git / blobdiff