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Java > Open Source Codes > org > objectstyle > cayenne > dataview > DOComboBoxModel


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.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
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".
32 *
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.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE OBJECTSTYLE GROUP OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
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 package org.objectstyle.cayenne.dataview;
57
58 import javax.swing.ComboBoxModel JavaDoc;
59
60 import org.objectstyle.cayenne.DataObject;
61
62 /**
63  * A ComboBoxModel to display DataObjects.
64  *
65  * @since 1.1
66  * @author Andriy Shapochka
67  */
68 public class DOComboBoxModel extends DOListModel implements ComboBoxModel JavaDoc {
69
70     protected DataObject selectedObject;
71
72     public DOComboBoxModel() {
73     }
74
75     public void setSelectedDataObject(DataObject dataObject) {
76         if ((selectedObject != null && !selectedObject.equals(dataObject))
77                 || selectedObject == null
78                 && dataObject != null) {
79             selectedObject = dataObject;
80             fireContentsChanged(this, -1, -1);
81         }
82     }
83
84     public DataObject getSelectedDataObject() {
85         return selectedObject;
86     }
87
88     public void setSelectedItem(Object JavaDoc selectedValue) {
89         if (viewField == null) {
90             if (selectedValue instanceof DataObject)
91                 setSelectedDataObject((DataObject) selectedValue);
92             else
93                 setSelectedDataObject(null);
94         }
95         else {
96             LookupCache cache = viewField.getOwner().getOwner().getLookupCache();
97             setSelectedDataObject(cache.getDataObject(viewField, selectedValue));
98         }
99     }
100
101     public Object JavaDoc getSelectedItem() {
102         if (viewField == null)
103             return getSelectedDataObject();
104         return viewField.getValue(getSelectedDataObject());
105     }
106 }
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