Coverage report

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org.apache.commons.jelly.tags.swt.converters.ColorConverter
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 1   
 /*
 2   
  * Copyright 2002,2004 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   
 package org.apache.commons.jelly.tags.swt.converters;
 17   
 
 18   
 import java.util.StringTokenizer;
 19   
 
 20   
 import org.apache.commons.beanutils.Converter;
 21   
 import org.eclipse.swt.graphics.RGB;
 22   
 
 23   
 /**
 24   
  * A Converter that converts Strings in the form "#uuuuuu" or "x,y,z" into a RGB object
 25   
  *
 26   
  * @author <a href="mailto:ckl@dacelo.nl">Christiaan ten Klooster</a>
 27   
  * @version $Revision: 155420 $
 28   
  */
 29  0 
 public class ColorConverter implements Converter {
 30   
 
 31  0 
     private static final ColorConverter instance = new ColorConverter();
 32   
 
 33  0 
     private static String usageText =
 34   
         "Color value should be in the form of '#xxxxxx' or 'x,y,z'";
 35   
 
 36   
     public static ColorConverter getInstance() {
 37  0 
         return instance;
 38   
     }
 39   
 
 40   
     /**
 41   
      * Parsers a String in the form "x, y, z" into an SWT RGB class
 42   
      * @param value
 43   
      * @return RGB
 44   
      */
 45   
     protected RGB parseRGB(String value) {
 46  0 
         StringTokenizer items = new StringTokenizer(value, ",");
 47  0 
         int red = 0;
 48  0 
         int green = 0;
 49  0 
         int blue = 0;
 50  0 
         if (items.hasMoreTokens()) {
 51  0 
             red = parseNumber(items.nextToken());
 52   
         }
 53  0 
         if (items.hasMoreTokens()) {
 54  0 
             green = parseNumber(items.nextToken());
 55   
         }
 56  0 
         if (items.hasMoreTokens()) {
 57  0 
             blue = parseNumber(items.nextToken());
 58   
         }
 59  0 
         return new RGB(red, green, blue);
 60   
     }
 61   
 
 62   
     /**
 63   
      * Parsers a String in the form "#xxxxxx" into an SWT RGB class
 64   
      * @param value
 65   
      * @return RGB
 66   
      */
 67   
     protected RGB parseHtml(String value) {
 68  0 
         if (value.length() != 7) {
 69  0 
             throw new IllegalArgumentException(usageText);
 70   
         }
 71  0 
         int colorValue = 0;
 72   
         try {
 73  0 
             colorValue = Integer.parseInt(value.substring(1), 16);
 74  0 
             java.awt.Color swingColor = new java.awt.Color(colorValue);
 75  0 
             return new RGB(
 76   
                 swingColor.getRed(),
 77   
                 swingColor.getGreen(),
 78   
                 swingColor.getBlue());
 79  0 
         } catch (NumberFormatException ex) {
 80  0 
             throw new IllegalArgumentException(
 81   
                 value + "is not a valid Html color\n " + ex);
 82   
         }
 83   
     }
 84   
 
 85   
     /**
 86   
      * Parse a String
 87   
      */
 88   
     public RGB parse(String value) {
 89  0 
         if (value.length() <= 1) {
 90  0 
             throw new IllegalArgumentException(usageText);
 91   
         }
 92   
 
 93  0 
         if (value.charAt(0) == '#') {
 94  0 
             return parseHtml(value);
 95  0 
         } else if (value.indexOf(',') != -1) {
 96  0 
             return parseRGB(value);
 97   
         } else {
 98  0 
             throw new IllegalArgumentException(usageText);
 99   
         }
 100   
     }
 101   
 
 102   
     // Converter interface
 103   
     //-------------------------------------------------------------------------
 104   
     public Object convert(Class type, Object value) {
 105  0 
         Object answer = null;
 106  0 
         if (value != null) {
 107  0 
             String text = value.toString();
 108  0 
             answer = parse(text);
 109   
         }
 110   
 
 111  0 
         System.out.println("Converting value: " + value + " into: " + answer);
 112   
 
 113  0 
         return answer;
 114   
     }
 115   
 
 116   
     protected int parseNumber(String text) {
 117  0 
         text = text.trim();
 118  0 
         return Integer.parseInt(text.trim());
 119   
     }
 120   
 }

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