Source for org.jfree.xml.parser.coretypes.ColorReadHandler

   1: /* ========================================================================
   2:  * JCommon : a free general purpose class library for the Java(tm) platform
   3:  * ========================================================================
   4:  *
   5:  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   6:  * 
   7:  * Project Info:  http://www.jfree.org/jcommon/index.html
   8:  *
   9:  * This library is free software; you can redistribute it and/or modify it 
  10:  * under the terms of the GNU Lesser General Public License as published by 
  11:  * the Free Software Foundation; either version 2.1 of the License, or 
  12:  * (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but 
  15:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
  16:  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
  17:  * License for more details.
  18:  *
  19:  * You should have received a copy of the GNU Lesser General Public
  20:  * License along with this library; if not, write to the Free Software
  21:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
  22:  * USA.  
  23:  *
  24:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
  25:  * in the United States and other countries.]
  26:  * 
  27:  * ----------------
  28:  * ColorReadHandler
  29:  * ----------------
  30:  * (C) Copyright 2003, by Thomas Morgner and Contributors.
  31:  *
  32:  * Original Author:  Thomas Morgner;
  33:  * Contributor(s):   David Gilbert (for Object Refinery Limited);
  34:  *
  35:  * $Id: ColorReadHandler.java,v 1.2 2005/10/18 13:33:32 mungady Exp $
  36:  *
  37:  * Changes (from 25-Nov-2003)
  38:  * --------------------------
  39:  * 25-Nov-2003 : Added standard header and Javadocs (DG);
  40:  *
  41:  */
  42: 
  43: package org.jfree.xml.parser.coretypes;
  44: 
  45: import java.awt.Color;
  46: 
  47: import org.jfree.xml.parser.AbstractXmlReadHandler;
  48: import org.xml.sax.Attributes;
  49: import org.xml.sax.SAXException;
  50: 
  51: /**
  52:  * A SAX handler for reading {@link Color} objects from an XML element.
  53:  */
  54: public class ColorReadHandler extends AbstractXmlReadHandler  {
  55: 
  56:     /** The color under construction. */
  57:     private Color color;
  58:     
  59:     /**
  60:      * Creates a new handler.
  61:      */
  62:     public ColorReadHandler() {
  63:         super();
  64:     }
  65: 
  66:     /**
  67:      * Called at the start of parsing a {@link Color} element, this method reads the attributes and
  68:      * constructs the {@link Color}. 
  69:      * 
  70:      * @param attrs  the attributes.
  71:      * 
  72:      * @throws SAXException to indicate a parsing error.
  73:      */
  74:     protected void startParsing(final Attributes attrs) throws SAXException {
  75:         final String encodedValue = attrs.getValue("value");
  76:         this.color = Color.decode(encodedValue);
  77:         if (attrs.getValue("alpha") != null) {
  78:             this.color = new Color(this.color.getRed(), this.color.getGreen(),
  79:                                    this.color.getBlue(), 
  80:                                    Integer.parseInt(attrs.getValue("alpha")));
  81:         }
  82:     }
  83: 
  84:     /**
  85:      * Returns the color under construction.
  86:      * 
  87:      * @return the color.
  88:      */
  89:     public Object getObject() {
  90:         return this.color;
  91:     }
  92:     
  93: }