HTML color and Java Color
/**
* Licensed under the Common Development and Distribution License,
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.sun.com/cddl/
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
//Revised from ajax4jsf
import java.awt.Color;
import java.util.HashMap;
import java.util.Map;
/**
* @author shura (latest modification by $Author: slava_kabanovich $)
* @version $Revision: 1.2 $ $Date: 2006/07/12 14:59:33 $
*
*/
public class HtmlColor {
private static Map colorNames;
static {
// color names.
colorNames = new HashMap();
colorNames.put("black", new Color(0x000000));
colorNames.put("green", new Color(0x008000));
colorNames.put("silver", new Color(0xC0C0C0));
colorNames.put("lime", new Color(0x00FF00));
colorNames.put("gray", new Color(0x808080));
colorNames.put("olive", new Color(0x808000));
colorNames.put("white", new Color(0xFFFFFF));
colorNames.put("yellow", new Color(0xFFFF00));
colorNames.put("maroon", new Color(0x800000));
colorNames.put("navy", new Color(0x000080));
colorNames.put("red", new Color(0xFF0000));
colorNames.put("blue", new Color(0x0000FF));
colorNames.put("purple", new Color(0x800080));
colorNames.put("teal", new Color(0x008080));
colorNames.put("fuchsia", new Color(0xFF00FF));
colorNames.put("aqua", new Color(0x00FFFF));
}
/**
* Decode HTML-attribute style of color to {@link Color}
* @param color - color name or #RRGGBB string
* @return - color for this value.
*/
public static Color decode(String color){
if(null == color) {
throw new IllegalArgumentException("NULL_COLOR_PARAMETER_ERROR");
}
Color c = (Color) colorNames.get(color.trim().toLowerCase());
if (null == c) {
try {
c = Color.decode(color.trim());
} catch (NumberFormatException e) {
throw new IllegalArgumentException("DECODE_COLOR_PARAMETER_ERROR");
}
}
return c;
}
public static Integer integerValue(String color){
return new Integer(decode(color).getRGB());
}
public static String encodeRGB(Color color){
if(null == color) {
throw new IllegalArgumentException("NULL_COLOR_PARAMETER_ERROR_2");
}
return "#" + Integer.toHexString(color.getRGB()).substring(2).toUpperCase();
}
}
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