    001    /* ========================================================================
    002     * JCommon : a free general purpose class library for the Java(tm) platform
    003     * ========================================================================
    004     *
    005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jcommon/index.html
    008     *
    009     * This library is free software; you can redistribute it and/or modify it
    010     * under the terms of the GNU Lesser General Public License as published by
    011     * the Free Software Foundation; either version 2.1 of the License, or
    012     * (at your option) any later version.
    013     *
    014     * This library is distributed in the hope that it will be useful, but
    015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017     * License for more details.
    018     *
    019     * You should have received a copy of the GNU Lesser General Public
    020     * License along with this library; if not, write to the Free Software
    021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022     * USA.
    023     *
    024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025     * in the United States and other countries.]
    026     *
    027     * --------------------------
    028     * RenderingHintsHandler.java
    029     * --------------------------
    030     * (C)opyright 2003-2005, by Thomas Morgner and Contributors.
    031     *
    032     * Original Author:  Thomas Morgner;
    033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
    034     *
    035     * $Id: RenderingHintsWriteHandler.java,v 1.5 2005/10/18 13:35:21 mungady Exp $
    036     *
    037     * Changes
    038     * -------------------------
    039     * 22.11.2003 : Initial version
    040     *
    041     */
    042
    043    package org.jfree.xml.writer.coretypes;
    044
    045    import java.awt.RenderingHints;
    046    import java.io.IOException;
    047    import java.lang.reflect.Field;
    048    import java.lang.reflect.Modifier;
    049    import java.util.Iterator;
    050
    051    import org.jfree.util.Log;
    052    import org.jfree.xml.writer.AbstractXmlWriteHandler;
    053    import org.jfree.xml.writer.AttributeList;
    054    import org.jfree.xml.writer.XMLWriter;
    055    import org.jfree.xml.writer.XMLWriterException;
    056    import org.jfree.xml.writer.XMLWriterSupport;
    057
    058    /**
    059     * A handler for writing a {@link RenderingHints} object.
    060     */
    061    public class RenderingHintsWriteHandler extends AbstractXmlWriteHandler {
    062
    063        /**
    064         * Default constructor.
    065         */
    066        public RenderingHintsWriteHandler() {
    067            super();
    068        }
    069
    070        /**
    071         * Performs the writing of a single object.
    072         *
    073         * @param tagName  the tag name.
    074         * @param object  the object.
    075         * @param writer  the writer.
    076         * @param mPlexAttribute  ??.
    077         * @param mPlexValue  ??.
    078         *
    079         * @throws IOException if there is an I/O error.
    080         * @throws XMLWriterException if there is a writer problem.
    081         */
    082        public void write(final String tagName, final Object object, final XMLWriter writer,
    083                          final String mPlexAttribute, final String mPlexValue)
    084            throws IOException, XMLWriterException {
    085
    086            writer.writeTag(tagName, mPlexAttribute, mPlexValue, XMLWriterSupport.OPEN);
    087            writer.allowLineBreak();
    088            final RenderingHints hints = (RenderingHints) object;
    089            final Iterator it = hints.keySet().iterator();
    090            while (it.hasNext()) {
    091                final RenderingHints.Key key = (RenderingHints.Key) it.next();
    092                final String keyname = hintFieldToString(key);
    093                final String value = hintFieldToString(hints.get(key));
    094                final AttributeList attribs = new AttributeList();
    095                attribs.setAttribute("key", keyname);
    096                attribs.setAttribute("value", value);
    097                writer.writeTag("entry", attribs, XMLWriterSupport.CLOSE);
    098                writer.allowLineBreak();
    099            }
    100            writer.writeCloseTag(tagName);
    101            writer.allowLineBreak();
    102        }
    103
    104        private String hintFieldToString(final Object o) {
    105            final Field[] fields = RenderingHints.class.getFields();
    106            for (int i = 0; i < fields.length; i++) {
    107                final Field f = fields[i];
    108                if (Modifier.isFinal(f.getModifiers())
    109                    && Modifier.isPublic(f.getModifiers())
    110                    && Modifier.isStatic(f.getModifiers())) {
    111                    try {
    112                        final Object value = f.get(null);
    113                        if (o.equals(value)) {
    114                            return f.getName();
    115                        }
    116                    }
    117                    catch (Exception e) {
    118                        Log.info ("Unable to write RenderingHint", e);
    119                    }
    120                }
    121            }
    122            throw new IllegalArgumentException("Invalid value given");
    123        }
    124
    125    }