Source for org.jfree.xml.writer.coretypes.RenderingHintsWriteHandler

   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:  * RenderingHintsHandler.java
  29:  * --------------------------
  30:  * (C)opyright 2003-2005, by Thomas Morgner and Contributors.
  31:  *
  32:  * Original Author:  Thomas Morgner;
  33:  * Contributor(s):   David Gilbert (for Object Refinery Limited);
  34:  *
  35:  * $Id: RenderingHintsWriteHandler.java,v 1.5 2005/10/18 13:35:21 mungady Exp $
  36:  *
  37:  * Changes 
  38:  * -------------------------
  39:  * 22.11.2003 : Initial version
  40:  *  
  41:  */
  42: 
  43: package org.jfree.xml.writer.coretypes;
  44: 
  45: import java.awt.RenderingHints;
  46: import java.io.IOException;
  47: import java.lang.reflect.Field;
  48: import java.lang.reflect.Modifier;
  49: import java.util.Iterator;
  50: 
  51: import org.jfree.util.Log;
  52: import org.jfree.xml.writer.AbstractXmlWriteHandler;
  53: import org.jfree.xml.writer.AttributeList;
  54: import org.jfree.xml.writer.XMLWriter;
  55: import org.jfree.xml.writer.XMLWriterException;
  56: import org.jfree.xml.writer.XMLWriterSupport;
  57: 
  58: /**
  59:  * A handler for writing a {@link RenderingHints} object.
  60:  */
  61: public class RenderingHintsWriteHandler extends AbstractXmlWriteHandler {
  62: 
  63:     /**
  64:      * Default constructor.
  65:      */
  66:     public RenderingHintsWriteHandler() {
  67:         super();
  68:     }
  69: 
  70:     /**
  71:      * Performs the writing of a single object.
  72:      *
  73:      * @param tagName  the tag name.
  74:      * @param object  the object.
  75:      * @param writer  the writer.
  76:      * @param mPlexAttribute  ??.
  77:      * @param mPlexValue  ??.
  78:      * 
  79:      * @throws IOException if there is an I/O error.
  80:      * @throws XMLWriterException if there is a writer problem.
  81:      */
  82:     public void write(final String tagName, final Object object, final XMLWriter writer,
  83:                       final String mPlexAttribute, final String mPlexValue)
  84:         throws IOException, XMLWriterException {
  85: 
  86:         writer.writeTag(tagName, mPlexAttribute, mPlexValue, XMLWriterSupport.OPEN);
  87:         writer.allowLineBreak();
  88:         final RenderingHints hints = (RenderingHints) object;
  89:         final Iterator it = hints.keySet().iterator();
  90:         while (it.hasNext()) {
  91:             final RenderingHints.Key key = (RenderingHints.Key) it.next();
  92:             final String keyname = hintFieldToString(key);
  93:             final String value = hintFieldToString(hints.get(key));
  94:             final AttributeList attribs = new AttributeList();
  95:             attribs.setAttribute("key", keyname);
  96:             attribs.setAttribute("value", value);
  97:             writer.writeTag("entry", attribs, XMLWriterSupport.CLOSE);
  98:             writer.allowLineBreak();
  99:         }
 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: }