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Java > Open Source Codes > nextapp > echo2 > app > componentxml > propertypeer > AlignmentPeer


1 /*
2  * This file is part of the Echo Web Application Framework (hereinafter "Echo").
3  * Copyright (C) 2002-2005 NextApp, Inc.
4  *
5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6  *
7  * The contents of this file are subject to the Mozilla Public License Version
8  * 1.1 (the "License"); you may not use this file except in compliance with
9  * the License. You may obtain a copy of the License at
10  * http://www.mozilla.org/MPL/
11  *
12  * Software distributed under the License is distributed on an "AS IS" basis,
13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14  * for the specific language governing rights and limitations under the
15  * License.
16  *
17  * Alternatively, the contents of this file may be used under the terms of
18  * either the GNU General Public License Version 2 or later (the "GPL"), or
19  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20  * in which case the provisions of the GPL or the LGPL are applicable instead
21  * of those above. If you wish to allow use of your version of this file only
22  * under the terms of either the GPL or the LGPL, and not to allow others to
23  * use your version of this file under the terms of the MPL, indicate your
24  * decision by deleting the provisions above and replace them with the notice
25  * and other provisions required by the GPL or the LGPL. If you do not delete
26  * the provisions above, a recipient may use your version of this file under
27  * the terms of any one of the MPL, the GPL or the LGPL.
28  */
29
30 package nextapp.echo2.app.componentxml.propertypeer;
31
32 import java.util.Collections JavaDoc;
33 import java.util.HashMap JavaDoc;
34 import java.util.Map JavaDoc;
35
36 import org.w3c.dom.Element JavaDoc;
37
38 import nextapp.echo2.app.Alignment;
39 import nextapp.echo2.app.componentxml.InvalidPropertyException;
40 import nextapp.echo2.app.componentxml.PropertyXmlPeer;
41 import nextapp.echo2.app.util.DomUtil;
42
43 /**
44  * <code>PropertyXmlPeer</code> implementation for
45  * <code>nextapp.echo2.app.Alignment</code> properties.
46  */
47 public class AlignmentPeer
48 implements PropertyXmlPeer {
49     
50     private static final Map JavaDoc HORIZONTAL_CONSTANTS;
51     static {
52         Map JavaDoc constantMap = new HashMap JavaDoc();
53         constantMap.put("leading", new Integer JavaDoc(Alignment.LEADING));
54         constantMap.put("trailing", new Integer JavaDoc(Alignment.TRAILING));
55         constantMap.put("left", new Integer JavaDoc(Alignment.LEFT));
56         constantMap.put("center", new Integer JavaDoc(Alignment.CENTER));
57         constantMap.put("right", new Integer JavaDoc(Alignment.RIGHT));
58         HORIZONTAL_CONSTANTS = Collections.unmodifiableMap(constantMap);
59     }
60     
61     private static final Map JavaDoc VERTICAL_CONSTANTS;
62     static {
63         Map JavaDoc constantMap = new HashMap JavaDoc();
64         constantMap.put("top", new Integer JavaDoc(Alignment.TOP));
65         constantMap.put("center", new Integer JavaDoc(Alignment.CENTER));
66         constantMap.put("bottom", new Integer JavaDoc(Alignment.BOTTOM));
67         VERTICAL_CONSTANTS = Collections.unmodifiableMap(constantMap);
68     }
69
70     /**
71      * @see nextapp.echo2.app.componentxml.PropertyXmlPeer#getValue(java.lang.ClassLoader,
72      * java.lang.Class, org.w3c.dom.Element)
73      */
74     public Object JavaDoc getValue(ClassLoader JavaDoc classLoader, Class JavaDoc objectClass, Element JavaDoc propertyElement)
75     throws InvalidPropertyException {
76         Element JavaDoc alignmentElement = DomUtil.getChildElementByTagName(propertyElement, "alignment");
77         int horizontal = Alignment.DEFAULT;
78         int vertical = Alignment.DEFAULT;
79         if (alignmentElement.hasAttribute("horizontal")) {
80             Integer JavaDoc horizontalValue = (Integer JavaDoc) HORIZONTAL_CONSTANTS.get(alignmentElement.getAttribute("horizontal"));
81             if (horizontalValue != null) {
82                 horizontal = horizontalValue.intValue();
83             }
84         }
85         if (alignmentElement.hasAttribute("vertical")) {
86             Integer JavaDoc verticalValue = (Integer JavaDoc) VERTICAL_CONSTANTS.get(alignmentElement.getAttribute("vertical"));
87             if (verticalValue != null) {
88                 vertical = verticalValue.intValue();
89             }
90         }
91         return new Alignment(horizontal, vertical);
92     }
93 }
94
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