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Java > Open Source Codes > org > swixml > converters > RectangleConverter


1 /*--
2  $Id: RectangleConverter.java,v 1.1 2004/03/01 07:56:03 wolfpaulus Exp $
3
4  Copyright (C) 2003-2004 Wolf Paulus.
5  All rights reserved.
6
7  Redistribution and use in source and binary forms, with or without
8  modification, are permitted provided that the following conditions
9  are met:
10
11  1. Redistributions of source code must retain the above copyright
12  notice, this list of conditions, and the following disclaimer.
13
14  2. Redistributions in binary form must reproduce the above copyright
15  notice, this list of conditions, and the disclaimer that follows
16  these conditions in the documentation and/or other materials provided
17  with the distribution.
18
19  3. The end-user documentation included with the redistribution,
20  if any, must include the following acknowledgment:
21         "This product includes software developed by the
22          SWIXML Project (http://www.swixml.org/)."
23  Alternately, this acknowledgment may appear in the software itself,
24  if and wherever such third-party acknowledgments normally appear.
25
26  4. The name "Swixml" must not be used to endorse or promote products
27  derived from this software without prior written permission. For
28  written permission, please contact <info_AT_swixml_DOT_org>
29
30  5. Products derived from this software may not be called "Swixml",
31  nor may "Swixml" appear in their name, without prior written
32  permission from the Swixml Project Management.
33
34  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
35  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
36  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
37  DISCLAIMED. IN NO EVENT SHALL THE SWIXML PROJECT OR ITS
38  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
41  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
42  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
43  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
44  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
45  SUCH DAMAGE.
46  ====================================================================
47
48  This software consists of voluntary contributions made by many
49  individuals on behalf of the Swixml Project and was originally
50  created by Wolf Paulus <wolf_AT_swixml_DOT_org>. For more information
51  on the Swixml Project, please see <http://www.swixml.org/>.
52 */
53
54 package org.swixml.converters;
55
56 import org.jdom.Attribute;
57 import org.swixml.Converter;
58 import org.swixml.Localizer;
59
60 import java.awt.*;
61 import java.util.StringTokenizer JavaDoc;
62
63 /**
64  * A Converter that turns a Strings in the form: width,height into Rectangle objects.
65  * <br>
66  * <h3>Examples for Valid XML attribute notations:</h3>
67  * <pre>
68  * <ul>
69  * <li>bounds="10,10,250,200"</li>
70  * </ul>
71  * </pre>
72  * @author <a HREF="mailto:wolf@paulus.com">Wolf Paulus</a>
73  * @version $Revision: 1.1 $
74  * @see java.awt.Rectangle
75  * @see org.swixml.ConverterLibrary
76  */
77
78 public final class RectangleConverter implements Converter {
79   /** converter's return type */
80   public static final Class JavaDoc TEMPLATE = Rectangle.class;
81
82   /**
83    * Converts a String into a Rectangle object
84    * @param type <code>Class</code> not used
85    * @param attr <code>Attribute</code> value fields needs provides convertable String
86    * @return <code>Object</code> - runtime type is <code>Dimension</code>
87    */
88   public Object JavaDoc convert( final Class JavaDoc type, final Attribute attr, Localizer localizer ) {
89     if (attr != null) {
90       StringTokenizer JavaDoc st = new StringTokenizer JavaDoc( attr.getValue(), "," );
91       int x = 0;
92       int y = 0;
93       int width = 0;
94       int height = 0;
95       if (st.hasMoreTokens()) {
96         x = Integer.parseInt( st.nextToken().trim() );
97       }
98       if (st.hasMoreTokens()) {
99         y = Integer.parseInt( st.nextToken().trim() );
100       }
101       if (st.hasMoreTokens()) {
102         width = Integer.parseInt( st.nextToken().trim() );
103       }
104       if (st.hasMoreTokens()) {
105         height = Integer.parseInt( st.nextToken().trim() );
106       }
107       return new Rectangle( x, y, width, height );
108     }
109     return null;
110   }
111
112
113   /**
114    * A <code>Converters</code> conversTo method informs about the Class type the converter
115    * is returning when its <code>convert</code> method is called
116    * @return <code>Class</code> - the Class the converter is returning when its convert method is called
117    */
118   public Class JavaDoc convertsTo() {
119     return TEMPLATE;
120   }
121 }
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