+++ /dev/null
-package org.apache.lucene.analysis.standard;
-
-/**
- * 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.InputStream;
-import java.io.InputStreamReader;
-import java.io.Reader;
-
-import org.apache.lucene.analysis.Tokenizer;
-import org.apache.lucene.analysis.standard.std31.StandardTokenizerImpl31;
-import org.apache.lucene.analysis.standard.std31.UAX29URLEmailTokenizerImpl31;
-import org.apache.lucene.analysis.tokenattributes.OffsetAttribute;
-import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
-import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
-import org.apache.lucene.analysis.tokenattributes.TypeAttribute;
-import org.apache.lucene.util.AttributeSource;
-import org.apache.lucene.util.Version;
-import org.apache.lucene.util.AttributeSource.AttributeFactory;
-
-/**
- * This class implements Word Break rules from the Unicode Text Segmentation
- * algorithm, as specified in
- * <a href="http://unicode.org/reports/tr29/">Unicode Standard Annex #29</a>
- * URLs and email addresses are also tokenized according to the relevant RFCs.
- * <p/>
- * Tokens produced are of the following types:
- * <ul>
- * <li><ALPHANUM>: A sequence of alphabetic and numeric characters</li>
- * <li><NUM>: A number</li>
- * <li><URL>: A URL</li>
- * <li><EMAIL>: An email address</li>
- * <li><SOUTHEAST_ASIAN>: A sequence of characters from South and Southeast
- * Asian languages, including Thai, Lao, Myanmar, and Khmer</li>
- * <li><IDEOGRAPHIC>: A single CJKV ideographic character</li>
- * <li><HIRAGANA>: A single hiragana character</li>
- * </ul>
- * <a name="version"/>
- * <p>You must specify the required {@link Version}
- * compatibility when creating UAX29URLEmailTokenizer:
- * <ul>
- * <li> As of 3.4, Hiragana and Han characters are no longer wrongly split
- * from their combining characters. If you use a previous version number,
- * you get the exact broken behavior for backwards compatibility.
- * </ul>
- */
-
-public final class UAX29URLEmailTokenizer extends Tokenizer {
- /** A private instance of the JFlex-constructed scanner */
- private final StandardTokenizerInterface scanner;
-
- public static final int ALPHANUM = 0;
- public static final int NUM = 1;
- public static final int SOUTHEAST_ASIAN = 2;
- public static final int IDEOGRAPHIC = 3;
- public static final int HIRAGANA = 4;
- public static final int KATAKANA = 5;
- public static final int HANGUL = 6;
- public static final int URL = 7;
- public static final int EMAIL = 8;
-
- /** String token types that correspond to token type int constants */
- public static final String [] TOKEN_TYPES = new String [] {
- StandardTokenizer.TOKEN_TYPES[StandardTokenizer.ALPHANUM],
- StandardTokenizer.TOKEN_TYPES[StandardTokenizer.NUM],
- StandardTokenizer.TOKEN_TYPES[StandardTokenizer.SOUTHEAST_ASIAN],
- StandardTokenizer.TOKEN_TYPES[StandardTokenizer.IDEOGRAPHIC],
- StandardTokenizer.TOKEN_TYPES[StandardTokenizer.HIRAGANA],
- StandardTokenizer.TOKEN_TYPES[StandardTokenizer.KATAKANA],
- StandardTokenizer.TOKEN_TYPES[StandardTokenizer.HANGUL],
- "<URL>",
- "<EMAIL>",
- };
-
- /** Alphanumeric sequences
- * @deprecated use {@link #TOKEN_TYPES} instead */
- @Deprecated
- public static final String WORD_TYPE = TOKEN_TYPES[ALPHANUM];
-
- /** Numbers
- * @deprecated use {@link #TOKEN_TYPES} instead */
- @Deprecated
- public static final String NUMERIC_TYPE = TOKEN_TYPES[NUM];
-
- /** URLs with scheme: HTTP(S), FTP, or FILE; no-scheme URLs match HTTP syntax
- * @deprecated use {@link #TOKEN_TYPES} instead */
- @Deprecated
- public static final String URL_TYPE = TOKEN_TYPES[URL];
-
- /** E-mail addresses
- * @deprecated use {@link #TOKEN_TYPES} instead */
- @Deprecated
- public static final String EMAIL_TYPE = TOKEN_TYPES[EMAIL];
-
- /**
- * Chars in class \p{Line_Break = Complex_Context} are from South East Asian
- * scripts (Thai, Lao, Myanmar, Khmer, etc.). Sequences of these are kept
- * together as as a single token rather than broken up, because the logic
- * required to break them at word boundaries is too complex for UAX#29.
- * <p>
- * See Unicode Line Breaking Algorithm: http://www.unicode.org/reports/tr14/#SA
- * @deprecated use {@link #TOKEN_TYPES} instead
- */
- @Deprecated
- public static final String SOUTH_EAST_ASIAN_TYPE = TOKEN_TYPES[SOUTHEAST_ASIAN];
-
- /** @deprecated use {@link #TOKEN_TYPES} instead */
- @Deprecated
- public static final String IDEOGRAPHIC_TYPE = TOKEN_TYPES[IDEOGRAPHIC];
-
- /** @deprecated use {@link #TOKEN_TYPES} instead */
- @Deprecated
- public static final String HIRAGANA_TYPE = TOKEN_TYPES[HIRAGANA];
-
- /** @deprecated use {@link #TOKEN_TYPES} instead */
- @Deprecated
- public static final String KATAKANA_TYPE = TOKEN_TYPES[KATAKANA];
-
- /** @deprecated use {@link #TOKEN_TYPES} instead */
- @Deprecated
- public static final String HANGUL_TYPE = TOKEN_TYPES[HANGUL];
-
- private int maxTokenLength = StandardAnalyzer.DEFAULT_MAX_TOKEN_LENGTH;
-
- /** Set the max allowed token length. Any token longer
- * than this is skipped. */
- public void setMaxTokenLength(int length) {
- this.maxTokenLength = length;
- }
-
- /** @see #setMaxTokenLength */
- public int getMaxTokenLength() {
- return maxTokenLength;
- }
-
- /** @deprecated use {@link #UAX29URLEmailTokenizer(Version, Reader)} instead. */
- @Deprecated
- public UAX29URLEmailTokenizer(Reader input) {
- this(Version.LUCENE_31, input);
- }
-
- /** @deprecated use {@link #UAX29URLEmailTokenizer(Version, Reader)} instead. */
- @Deprecated
- public UAX29URLEmailTokenizer(InputStream input) {
- this(Version.LUCENE_31, new InputStreamReader(input));
- }
-
- /** @deprecated use {@link #UAX29URLEmailTokenizer(Version, AttributeSource, Reader)} instead. */
- @Deprecated
- public UAX29URLEmailTokenizer(AttributeSource source, Reader input) {
- this(Version.LUCENE_31, source, input);
- }
-
- /** @deprecated use {@link #UAX29URLEmailTokenizer(Version, AttributeSource.AttributeFactory, Reader)} instead. */
- @Deprecated
- public UAX29URLEmailTokenizer(AttributeFactory factory, Reader input) {
- this(Version.LUCENE_31, factory, input);
- }
-
- /**
- * Creates a new instance of the UAX29URLEmailTokenizer. Attaches
- * the <code>input</code> to the newly created JFlex scanner.
- *
- * @param input The input reader
- */
- public UAX29URLEmailTokenizer(Version matchVersion, Reader input) {
- super(input);
- this.scanner = getScannerFor(matchVersion, input);
- }
-
- /**
- * Creates a new UAX29URLEmailTokenizer with a given {@link AttributeSource}.
- */
- public UAX29URLEmailTokenizer(Version matchVersion, AttributeSource source, Reader input) {
- super(source, input);
- this.scanner = getScannerFor(matchVersion, input);
- }
-
- /**
- * Creates a new UAX29URLEmailTokenizer with a given {@link AttributeFactory}
- */
- public UAX29URLEmailTokenizer(Version matchVersion, AttributeFactory factory, Reader input) {
- super(factory, input);
- this.scanner = getScannerFor(matchVersion, input);
- }
-
- private static StandardTokenizerInterface getScannerFor(Version matchVersion, Reader input) {
- if (matchVersion.onOrAfter(Version.LUCENE_34)) {
- return new UAX29URLEmailTokenizerImpl(input);
- } else {
- return new UAX29URLEmailTokenizerImpl31(input);
- }
- }
-
- // this tokenizer generates three attributes:
- // term offset, positionIncrement and type
- private final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
- private final OffsetAttribute offsetAtt = addAttribute(OffsetAttribute.class);
- private final PositionIncrementAttribute posIncrAtt = addAttribute(PositionIncrementAttribute.class);
- private final TypeAttribute typeAtt = addAttribute(TypeAttribute.class);
-
- @Override
- public final boolean incrementToken() throws IOException {
- clearAttributes();
- int posIncr = 1;
-
- while(true) {
- int tokenType = scanner.getNextToken();
-
- if (tokenType == StandardTokenizerInterface.YYEOF) {
- return false;
- }
-
- if (scanner.yylength() <= maxTokenLength) {
- posIncrAtt.setPositionIncrement(posIncr);
- scanner.getText(termAtt);
- final int start = scanner.yychar();
- offsetAtt.setOffset(correctOffset(start), correctOffset(start+termAtt.length()));
- typeAtt.setType(TOKEN_TYPES[tokenType]);
- return true;
- } else
- // When we skip a too-long term, we still increment the
- // position increment
- posIncr++;
- }
- }
-
- @Override
- public final void end() {
- // set final offset
- int finalOffset = correctOffset(scanner.yychar() + scanner.yylength());
- offsetAtt.setOffset(finalOffset, finalOffset);
- }
-
- @Override
- public void reset(Reader reader) throws IOException {
- super.reset(reader);
- scanner.yyreset(reader);
- }
-}
fnp / pylucene.git / blobdiff