Added per-field analysis capabilities

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150061 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Erik Hatcher 2003-09-25 18:54:55 +00:00
parent 97e5c5f405
commit dd29f75e77
2 changed files with 174 additions and 0 deletions
src
java/org/apache/lucene/analysis
test/org/apache/lucene/analysis

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package org.apache.lucene.analysis;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache Lucene" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache Lucene", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.io.Reader;
import java.util.Map;
import java.util.HashMap;
/**
* This analyzer is used to facilitate scenarios where different
* fields require different analysis techniques. Use {@link #addAnalyzer}
* to add a non-default analyzer on a field name basis.
* See {@link TestPerFieldAnalzyerWrapper} for example usage.
*/
public class PerFieldAnalyzerWrapper extends Analyzer {
private Analyzer defaultAnalyzer;
private Map analyzerMap = new HashMap();
/**
* Constructs with default analyzer.
*
* @param defaultAnalyzer Any fields not specifically
* defined to use a different analyzer will use the one provided here.
*/
public PerFieldAnalyzerWrapper(Analyzer defaultAnalyzer) {
this.defaultAnalyzer = defaultAnalyzer;
}
/**
* Defines an analyzer to use for the specified field.
*
* @param fieldName field name requiring a non-default analyzer.
* @param analyzer non-default analyzer to use for field
*/
public void addAnalyzer(String fieldName, Analyzer analyzer) {
analyzerMap.put(fieldName, analyzer);
}
public TokenStream tokenStream(String fieldName, Reader reader) {
Analyzer analyzer = (Analyzer) analyzerMap.get(fieldName);
if (analyzer == null) {
analyzer = defaultAnalyzer;
}
return analyzer.tokenStream(fieldName, reader);
}
}

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package org.apache.lucene.analysis;
import junit.framework.TestCase;
import java.io.StringReader;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache Lucene" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache Lucene", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
public class TestPerFieldAnalzyerWrapper extends TestCase {
public void testIt() throws Exception {
String text = "Qwerty";
PerFieldAnalyzerWrapper analyzer = new PerFieldAnalyzerWrapper(new WhitespaceAnalyzer());
analyzer.addAnalyzer("special", new SimpleAnalyzer());
TokenStream tokenStream = analyzer.tokenStream("field", new StringReader(text));
Token token = tokenStream.next();
assertEquals("WhitespaceAnalyzer does not lowercase", "Qwerty", token.termText());
tokenStream = analyzer.tokenStream("special", new StringReader(text));
token = tokenStream.next();
assertEquals("SimpleAnalyzer lowercases", "qwerty", token.termText());
}
}