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package org.apache.lucene.analysis;
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import org.apache.lucene.analysis.standard.ClassicAnalyzer;
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import org.apache.lucene.document.Document;
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import org.apache.lucene.document.Field;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.index.IndexWriter;
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import org.apache.lucene.index.IndexWriterConfig;
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import org.apache.lucene.index.Term;
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import org.apache.lucene.index.TermPositions;
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import org.apache.lucene.store.RAMDirectory;
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import org.apache.lucene.util.Version;
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import java.io.IOException;
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import java.util.Arrays;
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* Copyright 2004 The Apache Software Foundation
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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public class TestClassicAnalyzer extends BaseTokenStreamTestCase {
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private Analyzer a = new ClassicAnalyzer(TEST_VERSION_CURRENT);
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public void testMaxTermLength() throws Exception {
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ClassicAnalyzer sa = new ClassicAnalyzer(TEST_VERSION_CURRENT);
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sa.setMaxTokenLength(5);
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assertAnalyzesTo(sa, "ab cd toolong xy z", new String[]{"ab", "cd", "xy", "z"});
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public void testMaxTermLength2() throws Exception {
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ClassicAnalyzer sa = new ClassicAnalyzer(TEST_VERSION_CURRENT);
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assertAnalyzesTo(sa, "ab cd toolong xy z", new String[]{"ab", "cd", "toolong", "xy", "z"});
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sa.setMaxTokenLength(5);
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assertAnalyzesTo(sa, "ab cd toolong xy z", new String[]{"ab", "cd", "xy", "z"}, new int[]{1, 1, 2, 1});
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public void testMaxTermLength3() throws Exception {
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char[] chars = new char[255];
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for(int i=0;i<255;i++)
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String longTerm = new String(chars, 0, 255);
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assertAnalyzesTo(a, "ab cd " + longTerm + " xy z", new String[]{"ab", "cd", longTerm, "xy", "z"});
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assertAnalyzesTo(a, "ab cd " + longTerm + "a xy z", new String[]{"ab", "cd", "xy", "z"});
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public void testAlphanumeric() throws Exception {
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// alphanumeric tokens
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assertAnalyzesTo(a, "B2B", new String[]{"b2b"});
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assertAnalyzesTo(a, "2B", new String[]{"2b"});
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public void testUnderscores() throws Exception {
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// underscores are delimiters, but not in email addresses (below)
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assertAnalyzesTo(a, "word_having_underscore", new String[]{"word", "having", "underscore"});
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assertAnalyzesTo(a, "word_with_underscore_and_stopwords", new String[]{"word", "underscore", "stopwords"});
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public void testDelimiters() throws Exception {
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// other delimiters: "-", "/", ","
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assertAnalyzesTo(a, "some-dashed-phrase", new String[]{"some", "dashed", "phrase"});
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assertAnalyzesTo(a, "dogs,chase,cats", new String[]{"dogs", "chase", "cats"});
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assertAnalyzesTo(a, "ac/dc", new String[]{"ac", "dc"});
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public void testApostrophes() throws Exception {
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// internal apostrophes: O'Reilly, you're, O'Reilly's
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// possessives are actually removed by StardardFilter, not the tokenizer
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assertAnalyzesTo(a, "O'Reilly", new String[]{"o'reilly"});
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assertAnalyzesTo(a, "you're", new String[]{"you're"});
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assertAnalyzesTo(a, "she's", new String[]{"she"});
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assertAnalyzesTo(a, "Jim's", new String[]{"jim"});
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assertAnalyzesTo(a, "don't", new String[]{"don't"});
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assertAnalyzesTo(a, "O'Reilly's", new String[]{"o'reilly"});
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public void testTSADash() throws Exception {
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// t and s had been stopwords in Lucene <= 2.0, which made it impossible
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// to correctly search for these terms:
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assertAnalyzesTo(a, "s-class", new String[]{"s", "class"});
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assertAnalyzesTo(a, "t-com", new String[]{"t", "com"});
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// 'a' is still a stopword:
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assertAnalyzesTo(a, "a-class", new String[]{"class"});
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public void testCompanyNames() throws Exception {
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assertAnalyzesTo(a, "AT&T", new String[]{"at&t"});
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assertAnalyzesTo(a, "Excite@Home", new String[]{"excite@home"});
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public void testLucene1140() throws Exception {
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ClassicAnalyzer analyzer = new ClassicAnalyzer(TEST_VERSION_CURRENT);
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assertAnalyzesTo(analyzer, "www.nutch.org.", new String[]{ "www.nutch.org" }, new String[] { "<HOST>" });
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} catch (NullPointerException e) {
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fail("Should not throw an NPE and it did");
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public void testDomainNames() throws Exception {
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// Current lucene should not show the bug
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ClassicAnalyzer a2 = new ClassicAnalyzer(TEST_VERSION_CURRENT);
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assertAnalyzesTo(a2, "www.nutch.org", new String[]{"www.nutch.org"});
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//Notice the trailing . See https://issues.apache.org/jira/browse/LUCENE-1068.
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// the following should be recognized as HOST:
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assertAnalyzesTo(a2, "www.nutch.org.", new String[]{ "www.nutch.org" }, new String[] { "<HOST>" });
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// 2.3 should show the bug
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a2 = new ClassicAnalyzer(org.apache.lucene.util.Version.LUCENE_23);
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assertAnalyzesTo(a2, "www.nutch.org.", new String[]{ "wwwnutchorg" }, new String[] { "<ACRONYM>" });
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// 2.4 should not show the bug
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a2 = new ClassicAnalyzer(Version.LUCENE_24);
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assertAnalyzesTo(a2, "www.nutch.org.", new String[]{ "www.nutch.org" }, new String[] { "<HOST>" });
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public void testEMailAddresses() throws Exception {
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// email addresses, possibly with underscores, periods, etc
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assertAnalyzesTo(a, "test@example.com", new String[]{"test@example.com"});
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assertAnalyzesTo(a, "first.lastname@example.com", new String[]{"first.lastname@example.com"});
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assertAnalyzesTo(a, "first_lastname@example.com", new String[]{"first_lastname@example.com"});
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public void testNumeric() throws Exception {
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// floating point, serial, model numbers, ip addresses, etc.
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// every other segment must have at least one digit
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assertAnalyzesTo(a, "21.35", new String[]{"21.35"});
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assertAnalyzesTo(a, "R2D2 C3PO", new String[]{"r2d2", "c3po"});
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assertAnalyzesTo(a, "216.239.63.104", new String[]{"216.239.63.104"});
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assertAnalyzesTo(a, "1-2-3", new String[]{"1-2-3"});
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assertAnalyzesTo(a, "a1-b2-c3", new String[]{"a1-b2-c3"});
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assertAnalyzesTo(a, "a1-b-c3", new String[]{"a1-b-c3"});
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public void testTextWithNumbers() throws Exception {
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assertAnalyzesTo(a, "David has 5000 bones", new String[]{"david", "has", "5000", "bones"});
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public void testVariousText() throws Exception {
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assertAnalyzesTo(a, "C embedded developers wanted", new String[]{"c", "embedded", "developers", "wanted"});
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assertAnalyzesTo(a, "foo bar FOO BAR", new String[]{"foo", "bar", "foo", "bar"});
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assertAnalyzesTo(a, "foo bar . FOO <> BAR", new String[]{"foo", "bar", "foo", "bar"});
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assertAnalyzesTo(a, "\"QUOTED\" word", new String[]{"quoted", "word"});
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public void testAcronyms() throws Exception {
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// acronyms have their dots stripped
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assertAnalyzesTo(a, "U.S.A.", new String[]{"usa"});
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public void testCPlusPlusHash() throws Exception {
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// It would be nice to change the grammar in StandardTokenizer.jj to make "C#" and "C++" end up as tokens.
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assertAnalyzesTo(a, "C++", new String[]{"c"});
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assertAnalyzesTo(a, "C#", new String[]{"c"});
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public void testKorean() throws Exception {
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assertAnalyzesTo(a, "안녕하세요 한글입니다", new String[]{"안녕하세요", "한글입니다"});
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// Compliance with the "old" JavaCC-based analyzer, see:
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// https://issues.apache.org/jira/browse/LUCENE-966#action_12516752
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public void testComplianceFileName() throws Exception {
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assertAnalyzesTo(a, "2004.jpg",
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new String[]{"2004.jpg"},
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new String[]{"<HOST>"});
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public void testComplianceNumericIncorrect() throws Exception {
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assertAnalyzesTo(a, "62.46",
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new String[]{"62.46"},
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new String[]{"<HOST>"});
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public void testComplianceNumericLong() throws Exception {
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assertAnalyzesTo(a, "978-0-94045043-1",
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new String[]{"978-0-94045043-1"},
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new String[]{"<NUM>"});
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public void testComplianceNumericFile() throws Exception {
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"78academyawards/rules/rule02.html",
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new String[]{"78academyawards/rules/rule02.html"},
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new String[]{"<NUM>"});
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public void testComplianceNumericWithUnderscores() throws Exception {
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"2006-03-11t082958z_01_ban130523_rtridst_0_ozabs",
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new String[]{"2006-03-11t082958z_01_ban130523_rtridst_0_ozabs"},
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new String[]{"<NUM>"});
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public void testComplianceNumericWithDash() throws Exception {
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assertAnalyzesTo(a, "mid-20th", new String[]{"mid-20th"},
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new String[]{"<NUM>"});
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public void testComplianceManyTokens() throws Exception {
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"/money.cnn.com/magazines/fortune/fortune_archive/2007/03/19/8402357/index.htm "
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+ "safari-0-sheikh-zayed-grand-mosque.jpg",
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new String[]{"money.cnn.com", "magazines", "fortune",
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"fortune", "archive/2007/03/19/8402357", "index.htm",
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"safari-0-sheikh", "zayed", "grand", "mosque.jpg"},
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new String[]{"<HOST>", "<ALPHANUM>", "<ALPHANUM>",
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"<ALPHANUM>", "<NUM>", "<HOST>", "<NUM>", "<ALPHANUM>",
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"<ALPHANUM>", "<HOST>"});
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public void testJava14BWCompatibility() throws Exception {
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ClassicAnalyzer sa = new ClassicAnalyzer(Version.LUCENE_30);
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assertAnalyzesTo(sa, "test\u02C6test", new String[] { "test", "test" });
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* Make sure we skip wicked long terms.
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public void testWickedLongTerm() throws IOException {
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RAMDirectory dir = new RAMDirectory();
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IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(
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TEST_VERSION_CURRENT, new ClassicAnalyzer(TEST_VERSION_CURRENT)));
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char[] chars = new char[IndexWriter.MAX_TERM_LENGTH];
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Arrays.fill(chars, 'x');
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Document doc = new Document();
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final String bigTerm = new String(chars);
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// This produces a too-long term:
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String contents = "abc xyz x" + bigTerm + " another term";
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doc.add(new Field("content", contents, Field.Store.NO, Field.Index.ANALYZED));
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writer.addDocument(doc);
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// Make sure we can add another normal document
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doc = new Document();
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doc.add(new Field("content", "abc bbb ccc", Field.Store.NO, Field.Index.ANALYZED));
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writer.addDocument(doc);
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IndexReader reader = IndexReader.open(dir, true);
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// Make sure all terms < max size were indexed
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assertEquals(2, reader.docFreq(new Term("content", "abc")));
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assertEquals(1, reader.docFreq(new Term("content", "bbb")));
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assertEquals(1, reader.docFreq(new Term("content", "term")));
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assertEquals(1, reader.docFreq(new Term("content", "another")));
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// Make sure position is still incremented when
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// massive term is skipped:
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TermPositions tps = reader.termPositions(new Term("content", "another"));
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assertTrue(tps.next());
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assertEquals(1, tps.freq());
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assertEquals(3, tps.nextPosition());
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// Make sure the doc that has the massive term is in
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assertEquals("document with wicked long term should is not in the index!", 2, reader.numDocs());
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// Make sure we can add a document with exactly the
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// maximum length term, and search on that term:
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doc = new Document();
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doc.add(new Field("content", bigTerm, Field.Store.NO, Field.Index.ANALYZED));
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ClassicAnalyzer sa = new ClassicAnalyzer(TEST_VERSION_CURRENT);
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sa.setMaxTokenLength(100000);
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writer = new IndexWriter(dir, new IndexWriterConfig(TEST_VERSION_CURRENT, sa));
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writer.addDocument(doc);
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reader = IndexReader.open(dir, true);
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assertEquals(1, reader.docFreq(new Term("content", bigTerm)));
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/** blast some random strings through the analyzer */
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public void testRandomStrings() throws Exception {
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checkRandomData(random, new ClassicAnalyzer(TEST_VERSION_CURRENT), 10000*RANDOM_MULTIPLIER);