ColorCode


1   /*
2    * Copyright 1999-2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.apache.cocoon.components.elementprocessor.impl.poi.hssf.elements;
18  
19  import java.io.IOException  ;
20  
21  import java.util.StringTokenizer  ;
22  
23  /**
24   * Color codes
25   *
26   * @author Marc Johnson (marc_johnson27591@hotmail.com)
27   * @author Andrew C. Oliver (acoliver2@users.sourceforge.net)
28   * @version CVS $Id: ColorCode.java 30932 2004-07-29 17:35:38Z vgritsenko $
29   */
30  public class ColorCode {
31      private static final int _red             = 0;
32      private static final int _green           = 1;
33      private static final int _blue            = 2;
34      private static final int _component_count = 3;
35      private int[]            _components      = new int[ _component_count ];
36      private String             rgbstring        = null;
37  
38      /**
39       * construct the ColorCode object
40       *
41       * @param value the string containing the colors
42       *
43       * @exception IOException if the string is badly formed
44       */
45  
46      public ColorCode(final String   value) throws IOException   {
47          rgbstring = value;
48          if (value == null) {
49              throw new IOException  ("cannot process a null color code");
50          }
51          StringTokenizer   tokenizer = new StringTokenizer  (value.trim(), ":");
52  
53          if (tokenizer.countTokens() != _component_count) {
54              throw new IOException  ("color code must have exactly "
55                        + _component_count + " components, no more, no less");
56          }
57          for (int j = 0; j < _component_count; j++) {
58              try {
59                  _components[j] = Integer.parseInt(tokenizer.nextToken(), 16);
60              } catch (Exception   e) {
61                  throw new IOException  ("cannot parse component #" + j + " ("
62                                        + e.getMessage() + ")");
63              }
64              if (_components[j] < 0 || _components[j] > 65535) {
65                  throw new IOException  ("Component #" + j + " is out of range");
66              }
67          }
68      }
69  
70      /**
71       * @return red component
72       */
73  
74      public int getRed() {
75          return _components[_red];
76      }
77  
78      /**
79       * @return green component
80       */
81  
82      public int getGreen() {
83          return _components[_green];
84      }
85  
86      /**
87       * @return blue component
88       */
89  
90      public int getBlue() {
91          return _components[_blue];
92      }
93      
94      public String   toString() {
95          return rgbstring;
96      }
97  }   // end public class ColorCode
98
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