1 /*
2 * $Header: /home/cvs/jakarta-commons/betwixt/src/java/org/apache/commons/betwixt/strategy/DefaultPluralStemmer.java,v 1.3 2002/09/20 14:00:41 jvanzyl Exp $
3 * $Revision: 1.3 $
4 * $Date: 2002/09/20 14:00:41 $
5 *
6 * ====================================================================
7 *
8 * The Apache Software License, Version 1.1
9 *
10 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
11 * reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
23 * distribution.
24 *
25 * 3. The end-user documentation included with the redistribution, if
26 * any, must include the following acknowlegement:
27 * "This product includes software developed by the
28 * Apache Software Foundation (http://www.apache.org/)."
29 * Alternately, this acknowlegement may appear in the software itself,
30 * if and wherever such third-party acknowlegements normally appear.
31 *
32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
33 * Foundation" must not be used to endorse or promote products derived
34 * from this software without prior written permission. For written
35 * permission, please contact apache@apache.org.
36 *
37 * 5. Products derived from this software may not be called "Apache"
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40 *
41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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53 * ====================================================================
54 *
55 * This software consists of voluntary contributions made by many
56 * individuals on behalf of the Apache Software Foundation. For more
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58 * <http://www.apache.org/>;.
59 *
60 * $Id: DefaultPluralStemmer.java,v 1.3 2002/09/20 14:00:41 jvanzyl Exp $
61 */
62 package org.apache.commons.betwixt.strategy;
63
64 import org.apache.commons.betwixt.ElementDescriptor;
65
66 import java.util.Iterator;
67 import java.util.Map;
68
69 import org.apache.commons.logging.Log;
70 import org.apache.commons.logging.LogFactory;
71
72 /***
73 * A default implementation of the plural name stemmer which
74 * tests for some common english plural/singular patterns and
75 * then uses a simple starts-with algorithm
76 *
77 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
78 * @author <a href="mailto:martin@mvdb.net">Martin van den Bemt</a>
79 * @version $Revision: 1.3 $
80 */
81 public class DefaultPluralStemmer implements PluralStemmer {
82
83 /*** Log used for logging (Doh!) */
84 protected static Log log = LogFactory.getLog( DefaultPluralStemmer.class );
85
86 /***
87 * @return the plural descriptor for the given singular property name
88 */
89 public ElementDescriptor findPluralDescriptor( String propertyName, Map map) {
90 int foundKeyCount = 0;
91 String keyFound = null;
92 ElementDescriptor answer = (ElementDescriptor) map.get( propertyName + "s" );
93
94 if ( answer == null && !propertyName.endsWith( "y" )) {
95 answer = (ElementDescriptor) map.get( propertyName + "es" );
96 }
97
98 if ( answer == null ) {
99 int length = propertyName.length();
100 if ( propertyName.endsWith( "y" ) && length > 1 ) {
101 String key = propertyName.substring(0, length - 1) + "ies";
102 answer = (ElementDescriptor) map.get( key );
103 }
104
105 if ( answer == null ) {
106 // lets find the first one that starts with the propertyName
107 for ( Iterator iter = map.keySet().iterator(); iter.hasNext(); ) {
108 String key = (String) iter.next();
109 if ( key.startsWith( propertyName ) ) {
110 if (answer == null) {
111 answer = (ElementDescriptor) map.get(key);
112 if (key.equals(propertyName)) {
113 // we found the best match..
114 break;
115 }
116 foundKeyCount++;
117 keyFound = key;
118 }
119 else
120 {
121 // check if we have a better match,,
122 if (keyFound.length() > key.length()) {
123 answer = (ElementDescriptor) map.get(key);
124 keyFound = key;
125 }
126 foundKeyCount++;
127
128 }
129 }
130 }
131 }
132 }
133 if (foundKeyCount > 1) {
134 log.warn("More than one type matches, using closest match "+keyFound);
135 }
136 return answer;
137
138 }
139 }
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