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Java > Open Source Codes > org > objectstyle > cayenne > gen > StringUtils


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
5  *
6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
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19  * distribution.
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21  * 3. The end-user documentation included with the redistribution, if any,
22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
29  * or promote products derived from this software without prior written
30  * permission. For written permission, email
31  * "andrus at objectstyle dot org".
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33  * 5. Products derived from this software may not be called "ObjectStyle"
34  * or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
35  * names without prior written permission.
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37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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48  * SUCH DAMAGE.
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51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
56
57 package org.objectstyle.cayenne.gen;
58
59 import org.objectstyle.cayenne.project.validator.MappingNamesHelper;
60 import org.objectstyle.cayenne.util.NameConverter;
61
62 /**
63  * Methods for mangling strings.
64  *
65  * @author Mike Kienenberger
66  */
67 public class StringUtils {
68
69     private static StringUtils sharedInstance = null;
70     
71     public static StringUtils getInstance()
72     {
73         if (null == sharedInstance)
74         {
75             sharedInstance = new StringUtils();
76         }
77         
78         return sharedInstance;
79     }
80     
81     public StringUtils()
82     {
83         super();
84     }
85     
86     /**
87      * Prepends underscore to variable name if necessary to remove conflict with reserved keywords.
88      */
89     public String JavaDoc formatVariableName(String JavaDoc variableName) {
90         if (MappingNamesHelper.getInstance().isReservedJavaKeyword(variableName)) {
91             return "_" + variableName;
92         } else {
93             return variableName;
94         }
95     }
96
97     /**
98      * Removes package name, leaving base name.
99      *
100      * @since 1.2
101      */
102    public String JavaDoc stripPackageName(String JavaDoc aString)
103    {
104        if (aString == null || aString.length() == 0)
105            return aString;
106
107        int lastDot = aString.lastIndexOf('.');
108        
109        if ((-1 == lastDot) || ((aString.length() - 1) == lastDot) ) return aString;
110
111        return aString.substring(lastDot + 1);
112    }
113
114    /**
115     * Removes base name, leaving package name.
116     *
117     * @since 1.2
118     */
119   public String JavaDoc stripClass(String JavaDoc aString)
120   {
121       if (aString == null || aString.length() == 0)
122           return aString;
123
124       int lastDot = aString.lastIndexOf('.');
125       
126       if (-1 == lastDot) return "";
127       
128       return aString.substring(0, lastDot);
129   }
130
131     /**
132      * Capitalizes the first letter of the property name.
133      *
134      * @since 1.1
135      */
136     public String JavaDoc capitalized(String JavaDoc name) {
137         if (name == null || name.length() == 0)
138             return name;
139
140         char c = Character.toUpperCase(name.charAt(0));
141         return (name.length() == 1) ? Character.toString(c) : c + name.substring(1);
142     }
143     
144     /**
145      * Returns string with lowercased first letter
146      *
147      * @since 1.2
148      */
149    public static String JavaDoc uncapitalized(String JavaDoc aString)
150    {
151        if (aString == null || aString.length() == 0)
152            return aString;
153
154        char c = Character.toLowerCase(aString.charAt(0));
155        return (aString.length() == 1) ? Character.toString(c) : c + aString.substring(1);
156    }
157    
158     /**
159      * Converts property name to Java constants naming convention.
160      *
161      * @since 1.1
162      */
163     public String JavaDoc capitalizedAsConstant(String JavaDoc name) {
164         if (name == null || name.length() == 0)
165             return name;
166
167         return NameConverter.javaToUnderscored(name);
168     }
169 }
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