/* ========================================================================
* JCommon : a free general purpose class library for the Java(tm) platform
* ========================================================================
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ----------------------
* ColorWriteHandler.java
* ----------------------
* (C) Copyright 2003-2005, by Object Refinery Limited and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: ColorWriteHandler.java,v 1.3 2005/10/18 13:35:21 mungady Exp $
*
* Changes (from 23-Dec-2003)
* --------------------------
* 23-Dec-2003 : Added standard header and Javadocs (DG);
*
*/
package org.jfree.xml.writer.coretypes;
import java.awt.Color;
import java.io.IOException;
import org.jfree.xml.writer.AbstractXmlWriteHandler;
import org.jfree.xml.writer.AttributeList;
import org.jfree.xml.writer.XMLWriter;
import org.jfree.xml.writer.XMLWriterException;
/**
* A handler for writing a {@link Color} object.
*/
public class ColorWriteHandler extends AbstractXmlWriteHandler {
/**
* Default constructor.
*/
public ColorWriteHandler() {
super();
}
/**
* Performs the writing of a {@link Color} object.
*
* @param tagName the tag name.
* @param object the {@link Color} object.
* @param writer the writer.
* @param mPlexAttribute ??.
* @param mPlexValue ??.
*
* @throws IOException if there is an I/O error.
* @throws XMLWriterException if there is a writer error.
*/
public void write(final String tagName, final Object object, final XMLWriter writer,
final String mPlexAttribute, final String mPlexValue)
throws IOException, XMLWriterException {
final Color color = (Color) object;
final AttributeList attribs = new AttributeList();
if (mPlexAttribute != null) {
attribs.setAttribute(mPlexAttribute, mPlexValue);
}
attribs.setAttribute("value", encodeColor(color));
if (color.getAlpha() != 255) {
attribs.setAttribute("alpha", String.valueOf(color.getAlpha()));
}
writer.writeTag(tagName, attribs, true);
}
private String encodeColor(final Color color) {
return "#" + encodeInt(color.getRed())
+ encodeInt(color.getGreen()) + encodeInt(color.getBlue());
}
private String encodeInt(final int i) {
final String retVal = Integer.toHexString(i);
if (retVal.length() == 1) {
return "0" + retVal;
}
else {
return retVal;
}
}
}