1 //----------------------------------------------------------------------
2 //
3 // PerfectJPattern: "Design patterns are good but components are better!"
4 // Example.java Copyright (c) 2009 Giovanni Azua Garcia
5 // bravegag@hotmail.com
6 //
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License
9 // as published by the Free Software Foundation; either version 3
10 // of the License, or (at your option) any later version.
11 //
12 // This program is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 //
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, see <http://www.gnu.org/licenses/>.
19 //
20 //----------------------------------------------------------------------
21 package org.perfectjpattern.core.structural.composite;
22
23 import java.util.*;
24
25 import org.perfectjpattern.core.api.structural.composite.*;
26
27 /**
28 * Startup Main for the Composite Pattern Example code
29 *
30 * @author <a href="mailto:bravegag@hotmail.com">Giovanni Azua</a>
31 * @version $Revision: 1.0 $Date: Apr 5, 2008 10:11:17 PM $
32 */
33 //CHECKSTYLE:OFF
34 public final
35 class Example
36 // CHECKSTYLE:ON
37 {
38 //------------------------------------------------------------------------
39 // public
40 //------------------------------------------------------------------------
41 public static void
42 main(String[] anArguments)
43 {
44 //---------------------------------------------------------------
45 // Create composition using the reusable Composite implementation
46 //---------------------------------------------------------------
47 IComposite<IGraphic> myNestedComposite = new Composite<IGraphic>(
48 IGraphic.class);
49 myNestedComposite.add(new Rectangle());
50 myNestedComposite.add(new Line());
51 myNestedComposite.add(new Line());
52
53 IComposite<IGraphic> myComposite = new Composite<IGraphic>(IGraphic.
54 class);
55 myComposite.add(new Rectangle());
56 myComposite.add(new Text());
57 myComposite.add(new Text());
58 myComposite.add(myNestedComposite.getComponent());
59
60 //---------------------------------------------------------------
61 // Optionally define a custom order for the Composition
62 //---------------------------------------------------------------
63 Comparator<IGraphic> myComparator = new Comparator<IGraphic>()
64 {
65 //----------------------------------------------------------------
66 public int
67 compare(IGraphic aGraphicA, IGraphic aGraphicB)
68 {
69 //
70 // let's say we want to order alphabetically by type, except for
71 // nested Composite types, we want Composites at the beginning
72 //
73 String myNameA = aGraphicA.getClass().getSimpleName();
74 String myNameB = aGraphicB.getClass().getSimpleName();
75
76 return myNameA.compareTo(myNameB);
77 }
78 };
79
80 Collections.sort(myNestedComposite, myComparator);
81 Collections.sort(myComposite, myComparator);
82
83 //---------------------------------------------------------------
84 // Acquire reference to an IGraphic view of the Composite and call
85 // business methods on it
86 //---------------------------------------------------------------
87 IGraphic myGraphic = myComposite.getComponent();
88 myGraphic.draw();
89 }
90 }