Source Code Cross Referenced for TestStandardAnalyzer.java in  » Net » lucene-connector » org » apache » lucene » analysis » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » lucene connector » org.apache.lucene.analysis 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package org.apache.lucene.analysis;
002:
003:        import org.apache.lucene.analysis.standard.StandardAnalyzer;
004:        import org.apache.lucene.util.LuceneTestCase;
005:
006:        import java.io.StringReader;
007:
008:        /**
009:         * Copyright 2004 The Apache Software Foundation
010:         * <p/>
011:         * Licensed under the Apache License, Version 2.0 (the "License");
012:         * you may not use this file except in compliance with the License.
013:         * You may obtain a copy of the License at
014:         * <p/>
015:         * http://www.apache.org/licenses/LICENSE-2.0
016:         * <p/>
017:         * Unless required by applicable law or agreed to in writing, software
018:         * distributed under the License is distributed on an "AS IS" BASIS,
019:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
020:         * See the License for the specific language governing permissions and
021:         * limitations under the License.
022:         */
023:
024:        public class TestStandardAnalyzer extends LuceneTestCase {
025:
026:            private Analyzer a = new StandardAnalyzer();
027:
028:            public void assertAnalyzesTo(Analyzer a, String input,
029:                    String[] expected) throws Exception {
030:                assertAnalyzesTo(a, input, expected, null);
031:            }
032:
033:            public void assertAnalyzesTo(Analyzer a, String input,
034:                    String[] expectedImages, String[] expectedTypes)
035:                    throws Exception {
036:                assertAnalyzesTo(a, input, expectedImages, expectedTypes, null);
037:            }
038:
039:            public void assertAnalyzesTo(Analyzer a, String input,
040:                    String[] expectedImages, String[] expectedTypes,
041:                    int[] expectedPosIncrs) throws Exception {
042:                TokenStream ts = a
043:                        .tokenStream("dummy", new StringReader(input));
044:                for (int i = 0; i < expectedImages.length; i++) {
045:                    Token t = ts.next();
046:                    assertNotNull(t);
047:                    assertEquals(expectedImages[i], t.termText());
048:                    if (expectedTypes != null) {
049:                        assertEquals(expectedTypes[i], t.type());
050:                    }
051:                    if (expectedPosIncrs != null) {
052:                        assertEquals(expectedPosIncrs[i], t
053:                                .getPositionIncrement());
054:                    }
055:                }
056:                assertNull(ts.next());
057:                ts.close();
058:            }
059:
060:            public void testMaxTermLength() throws Exception {
061:                StandardAnalyzer sa = new StandardAnalyzer();
062:                sa.setMaxTokenLength(5);
063:                assertAnalyzesTo(sa, "ab cd toolong xy z", new String[] { "ab",
064:                        "cd", "xy", "z" });
065:            }
066:
067:            public void testMaxTermLength2() throws Exception {
068:                StandardAnalyzer sa = new StandardAnalyzer();
069:                assertAnalyzesTo(sa, "ab cd toolong xy z", new String[] { "ab",
070:                        "cd", "toolong", "xy", "z" });
071:                sa.setMaxTokenLength(5);
072:
073:                assertAnalyzesTo(sa, "ab cd toolong xy z", new String[] { "ab",
074:                        "cd", "xy", "z" }, null, new int[] { 1, 1, 2, 1 });
075:            }
076:
077:            public void testMaxTermLength3() throws Exception {
078:                char[] chars = new char[255];
079:                for (int i = 0; i < 255; i++)
080:                    chars[i] = 'a';
081:                String longTerm = new String(chars, 0, 255);
082:
083:                assertAnalyzesTo(a, "ab cd " + longTerm + " xy z",
084:                        new String[] { "ab", "cd", longTerm, "xy", "z" });
085:                assertAnalyzesTo(a, "ab cd " + longTerm + "a xy z",
086:                        new String[] { "ab", "cd", "xy", "z" });
087:            }
088:
089:            public void testAlphanumeric() throws Exception {
090:                // alphanumeric tokens
091:                assertAnalyzesTo(a, "B2B", new String[] { "b2b" });
092:                assertAnalyzesTo(a, "2B", new String[] { "2b" });
093:            }
094:
095:            public void testUnderscores() throws Exception {
096:                // underscores are delimiters, but not in email addresses (below)
097:                assertAnalyzesTo(a, "word_having_underscore", new String[] {
098:                        "word", "having", "underscore" });
099:                assertAnalyzesTo(a, "word_with_underscore_and_stopwords",
100:                        new String[] { "word", "underscore", "stopwords" });
101:            }
102:
103:            public void testDelimiters() throws Exception {
104:                // other delimiters: "-", "/", ","
105:                assertAnalyzesTo(a, "some-dashed-phrase", new String[] {
106:                        "some", "dashed", "phrase" });
107:                assertAnalyzesTo(a, "dogs,chase,cats", new String[] { "dogs",
108:                        "chase", "cats" });
109:                assertAnalyzesTo(a, "ac/dc", new String[] { "ac", "dc" });
110:            }
111:
112:            public void testApostrophes() throws Exception {
113:                // internal apostrophes: O'Reilly, you're, O'Reilly's
114:                // possessives are actually removed by StardardFilter, not the tokenizer
115:                assertAnalyzesTo(a, "O'Reilly", new String[] { "o'reilly" });
116:                assertAnalyzesTo(a, "you're", new String[] { "you're" });
117:                assertAnalyzesTo(a, "she's", new String[] { "she" });
118:                assertAnalyzesTo(a, "Jim's", new String[] { "jim" });
119:                assertAnalyzesTo(a, "don't", new String[] { "don't" });
120:                assertAnalyzesTo(a, "O'Reilly's", new String[] { "o'reilly" });
121:            }
122:
123:            public void testTSADash() throws Exception {
124:                // t and s had been stopwords in Lucene <= 2.0, which made it impossible
125:                // to correctly search for these terms:
126:                assertAnalyzesTo(a, "s-class", new String[] { "s", "class" });
127:                assertAnalyzesTo(a, "t-com", new String[] { "t", "com" });
128:                // 'a' is still a stopword:
129:                assertAnalyzesTo(a, "a-class", new String[] { "class" });
130:            }
131:
132:            public void testCompanyNames() throws Exception {
133:                // company names
134:                assertAnalyzesTo(a, "AT&T", new String[] { "at&t" });
135:                assertAnalyzesTo(a, "Excite@Home",
136:                        new String[] { "excite@home" });
137:            }
138:
139:            public void testLucene1140() throws Exception {
140:                try {
141:                    StandardAnalyzer analyzer = new StandardAnalyzer(true);
142:                    assertAnalyzesTo(analyzer, "www.nutch.org.",
143:                            new String[] { "www.nutch.org" },
144:                            new String[] { "<HOST>" });
145:                } catch (NullPointerException e) {
146:                    assertTrue("Should not throw an NPE and it did", false);
147:                }
148:
149:            }
150:
151:            public void testDomainNames() throws Exception {
152:                // domain names
153:                assertAnalyzesTo(a, "www.nutch.org",
154:                        new String[] { "www.nutch.org" });
155:                //Notice the trailing .  See https://issues.apache.org/jira/browse/LUCENE-1068.
156:                //TODO: Remove in 3.x
157:                assertAnalyzesTo(a, "www.nutch.org.",
158:                        new String[] { "wwwnutchorg" },
159:                        new String[] { "<ACRONYM>" });
160:                // the following should be recognized as HOST. The code that sets replaceDepAcronym should be removed in the next release.
161:                ((StandardAnalyzer) a).setReplaceInvalidAcronym(true);
162:                assertAnalyzesTo(a, "www.nutch.org.",
163:                        new String[] { "www.nutch.org" },
164:                        new String[] { "<HOST>" });
165:            }
166:
167:            public void testEMailAddresses() throws Exception {
168:                // email addresses, possibly with underscores, periods, etc
169:                assertAnalyzesTo(a, "test@example.com",
170:                        new String[] { "test@example.com" });
171:                assertAnalyzesTo(a, "first.lastname@example.com",
172:                        new String[] { "first.lastname@example.com" });
173:                assertAnalyzesTo(a, "first_lastname@example.com",
174:                        new String[] { "first_lastname@example.com" });
175:            }
176:
177:            public void testNumeric() throws Exception {
178:                // floating point, serial, model numbers, ip addresses, etc.
179:                // every other segment must have at least one digit
180:                assertAnalyzesTo(a, "21.35", new String[] { "21.35" });
181:                assertAnalyzesTo(a, "R2D2 C3PO",
182:                        new String[] { "r2d2", "c3po" });
183:                assertAnalyzesTo(a, "216.239.63.104",
184:                        new String[] { "216.239.63.104" });
185:                assertAnalyzesTo(a, "1-2-3", new String[] { "1-2-3" });
186:                assertAnalyzesTo(a, "a1-b2-c3", new String[] { "a1-b2-c3" });
187:                assertAnalyzesTo(a, "a1-b-c3", new String[] { "a1-b-c3" });
188:            }
189:
190:            public void testTextWithNumbers() throws Exception {
191:                // numbers
192:                assertAnalyzesTo(a, "David has 5000 bones", new String[] {
193:                        "david", "has", "5000", "bones" });
194:            }
195:
196:            public void testVariousText() throws Exception {
197:                // various
198:                assertAnalyzesTo(
199:                        a,
200:                        "C embedded developers wanted",
201:                        new String[] { "c", "embedded", "developers", "wanted" });
202:                assertAnalyzesTo(a, "foo bar FOO BAR", new String[] { "foo",
203:                        "bar", "foo", "bar" });
204:                assertAnalyzesTo(a, "foo      bar .  FOO <> BAR", new String[] {
205:                        "foo", "bar", "foo", "bar" });
206:                assertAnalyzesTo(a, "\"QUOTED\" word", new String[] { "quoted",
207:                        "word" });
208:            }
209:
210:            public void testAcronyms() throws Exception {
211:                // acronyms have their dots stripped
212:                assertAnalyzesTo(a, "U.S.A.", new String[] { "usa" });
213:            }
214:
215:            public void testCPlusPlusHash() throws Exception {
216:                // It would be nice to change the grammar in StandardTokenizer.jj to make "C#" and "C++" end up as tokens.
217:                assertAnalyzesTo(a, "C++", new String[] { "c" });
218:                assertAnalyzesTo(a, "C#", new String[] { "c" });
219:            }
220:
221:            public void testKorean() throws Exception {
222:                // Korean words
223:                assertAnalyzesTo(a, "안녕하세요 한글입니다",
224:                        new String[] { "안녕하세요", "한글입니다" });
225:            }
226:
227:            // Compliance with the "old" JavaCC-based analyzer, see:
228:            // https://issues.apache.org/jira/browse/LUCENE-966#action_12516752
229:
230:            public void testComplianceFileName() throws Exception {
231:                assertAnalyzesTo(a, "2004.jpg", new String[] { "2004.jpg" },
232:                        new String[] { "<HOST>" });
233:            }
234:
235:            public void testComplianceNumericIncorrect() throws Exception {
236:                assertAnalyzesTo(a, "62.46", new String[] { "62.46" },
237:                        new String[] { "<HOST>" });
238:            }
239:
240:            public void testComplianceNumericLong() throws Exception {
241:                assertAnalyzesTo(a, "978-0-94045043-1",
242:                        new String[] { "978-0-94045043-1" },
243:                        new String[] { "<NUM>" });
244:            }
245:
246:            public void testComplianceNumericFile() throws Exception {
247:                assertAnalyzesTo(a, "78academyawards/rules/rule02.html",
248:                        new String[] { "78academyawards/rules/rule02.html" },
249:                        new String[] { "<NUM>" });
250:            }
251:
252:            public void testComplianceNumericWithUnderscores() throws Exception {
253:                assertAnalyzesTo(
254:                        a,
255:                        "2006-03-11t082958z_01_ban130523_rtridst_0_ozabs",
256:                        new String[] { "2006-03-11t082958z_01_ban130523_rtridst_0_ozabs" },
257:                        new String[] { "<NUM>" });
258:            }
259:
260:            public void testComplianceNumericWithDash() throws Exception {
261:                assertAnalyzesTo(a, "mid-20th", new String[] { "mid-20th" },
262:                        new String[] { "<NUM>" });
263:            }
264:
265:            public void testComplianceManyTokens() throws Exception {
266:                assertAnalyzesTo(
267:                        a,
268:                        "/money.cnn.com/magazines/fortune/fortune_archive/2007/03/19/8402357/index.htm "
269:                                + "safari-0-sheikh-zayed-grand-mosque.jpg",
270:                        new String[] { "money.cnn.com", "magazines", "fortune",
271:                                "fortune", "archive/2007/03/19/8402357",
272:                                "index.htm", "safari-0-sheikh", "zayed",
273:                                "grand", "mosque.jpg" }, new String[] {
274:                                "<HOST>", "<ALPHANUM>", "<ALPHANUM>",
275:                                "<ALPHANUM>", "<NUM>", "<HOST>", "<NUM>",
276:                                "<ALPHANUM>", "<ALPHANUM>", "<HOST>" });
277:            }
278:
279:            /** @deprecated this should be removed in the 3.0. */
280:            public void testDeprecatedAcronyms() throws Exception {
281:                // test backward compatibility for applications that require the old behavior.
282:                // this should be removed once replaceDepAcronym is removed.
283:                assertAnalyzesTo(a, "lucene.apache.org.",
284:                        new String[] { "luceneapacheorg" },
285:                        new String[] { "<ACRONYM>" });
286:            }
287:        }
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