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Java > Open Source Codes > com > thoughtriver > open > vectorvisuals > persistence > AreaPersistenceDelegate


1 /*
2  * AreaPersistenceDelegate.java
3  *
4  * Created on Oct 27, 2005, 7:53 PM
5  */
6 package com.thoughtriver.open.vectorvisuals.persistence;
7
8 import java.awt.*;
9 import java.awt.geom.*;
10 import java.beans.*;
11
12 /**
13  * This delegate provides persistence capability for <CODE>Area</CODE>
14  * instances.
15  *
16  * @author Brandon Franklin
17  * @version $Date: 2006/11/25 09:08:28 $
18  */
19 public class AreaPersistenceDelegate extends DefaultPersistenceDelegate {
20
21     /**
22      * {@inheritDoc}
23      */
24     @Override JavaDoc
25     protected Expression instantiate(final Object JavaDoc oldInstance, @SuppressWarnings JavaDoc("unused") final Encoder out) {
26         Expression expression = null;
27
28         Area area = (Area) oldInstance;
29         if (area.isEmpty()) {
30             expression = new Expression(area, area.getClass(), "new", new Object JavaDoc[] {});
31         }
32         else if (area.isRectangular()) {
33             expression = new Expression(area, area.getClass(), "new", new Object JavaDoc[] {
34                 area.getBounds2D()
35             });
36         }
37         else if (area.isPolygonal()) {
38             Polygon polygon = new Polygon();
39
40             PathIterator iterator = area.getPathIterator(null);
41             float[] coords = new float[6];
42             while (!iterator.isDone()) {
43                 iterator.currentSegment(coords);
44                 iterator.next();
45                 polygon.addPoint((int) coords[0], (int) coords[1]);
46             }
47
48             expression = new Expression(area, area.getClass(), "new", new Object JavaDoc[] {
49                 polygon
50             });
51         }
52         else {
53             throw new UnsupportedOperationException JavaDoc("Persistence for this type of Area is not yet supported.");
54         }
55
56         return expression;
57     }
58
59 }
60
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