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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: * ColorWriteHandler.java 29: * ---------------------- 30: * (C) Copyright 2003-2005, by Object Refinery Limited and Contributors. 31: * 32: * Original Author: Thomas Morgner; 33: * Contributor(s): David Gilbert (for Object Refinery Limited); 34: * 35: * $Id: ColorWriteHandler.java,v 1.3 2005/10/18 13:35:21 mungady Exp $ 36: * 37: * Changes (from 23-Dec-2003) 38: * -------------------------- 39: * 23-Dec-2003 : Added standard header and Javadocs (DG); 40: * 41: */ 42: 43: package org.jfree.xml.writer.coretypes; 44: 45: import java.awt.Color; 46: import java.io.IOException; 47: 48: import org.jfree.xml.writer.AbstractXmlWriteHandler; 49: import org.jfree.xml.writer.AttributeList; 50: import org.jfree.xml.writer.XMLWriter; 51: import org.jfree.xml.writer.XMLWriterException; 52: 53: /** 54: * A handler for writing a {@link Color} object. 55: */ 56: public class ColorWriteHandler extends AbstractXmlWriteHandler { 57: 58: /** 59: * Default constructor. 60: */ 61: public ColorWriteHandler() { 62: super(); 63: } 64: 65: /** 66: * Performs the writing of a {@link Color} object. 67: * 68: * @param tagName the tag name. 69: * @param object the {@link Color} object. 70: * @param writer the writer. 71: * @param mPlexAttribute ??. 72: * @param mPlexValue ??. 73: * 74: * @throws IOException if there is an I/O error. 75: * @throws XMLWriterException if there is a writer error. 76: */ 77: public void write(final String tagName, final Object object, final XMLWriter writer, 78: final String mPlexAttribute, final String mPlexValue) 79: throws IOException, XMLWriterException { 80: final Color color = (Color) object; 81: final AttributeList attribs = new AttributeList(); 82: if (mPlexAttribute != null) { 83: attribs.setAttribute(mPlexAttribute, mPlexValue); 84: } 85: attribs.setAttribute("value", encodeColor(color)); 86: if (color.getAlpha() != 255) { 87: attribs.setAttribute("alpha", String.valueOf(color.getAlpha())); 88: } 89: writer.writeTag(tagName, attribs, true); 90: } 91: 92: private String encodeColor(final Color color) { 93: return "#" + encodeInt(color.getRed()) 94: + encodeInt(color.getGreen()) + encodeInt(color.getBlue()); 95: } 96: 97: private String encodeInt(final int i) { 98: final String retVal = Integer.toHexString(i); 99: if (retVal.length() == 1) { 100: return "0" + retVal; 101: } 102: else { 103: return retVal; 104: } 105: } 106: }