ColorFactory


1   //The contents of this file are subject to the Mozilla Public License Version 1.1
2   //(the "License"); you may not use this file except in compliance with the
3   //License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
4   //
5   //Software distributed under the License is distributed on an "AS IS" basis,
6   //WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
7   //for the specific language governing rights and
8   //limitations under the License.
9   //
10  //The Original Code is "The Columba Project"
11  //
12  //The Initial Developers of the Original Code are Frederik Dietz and Timo Stich.
13  //Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003.
14  //
15  //All Rights Reserved.
16  
17  package org.columba.core.gui.base;
18  
19  import java.awt.Color  ;
20  import java.util.Hashtable  ;
21  import java.util.Map  ;
22  
23  /**
24   * Factory class that creates <code>Color</code> objects.
25   * The factory returns a <code>Color</code> object that should not
26   * be altered.
27   *
28   * @author redsolo
29   */
30  public class ColorFactory {
31      private static Map   colors = new Hashtable  ();
32  
33      /**
34   * Returns a <code>Color</code> object for the specified rgb value.
35   * The method returns the same object if it is accessed with the same
36   * rgb value.
37   * @param rgb the rgb value.
38   * @return a <code>Color</code> object.
39   */
40      public static Color   getColor(int rgb) {
41          Integer   key = new Integer  (rgb);
42          Color   color = (Color  ) colors.get(key);
43  
44          if (color == null) {
45              color = new Color  (rgb);
46              colors.put(key, color);
47          }
48  
49          return color;
50      }
51  
52      /**
53   * Clears all Colors from this factory.
54   */
55      public static void clear() {
56          colors.clear();
57      }
58  }
59
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