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 * GenericWriteHandler.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: GenericWriteHandler.java,v 1.6 2005/11/16 15:58:41 taqua Exp $ 036 * 037 * Changes 038 * ------- 039 * 23-Sep-2003 : Initial version (TM); 040 * 23-Dec-2003 : Added missing Javadocs (DG); 041 * 042 */ 043 044 package org.jfree.xml.writer.coretypes; 045 046 import java.io.IOException; 047 import java.util.ArrayList; 048 049 import org.jfree.util.Log; 050 import org.jfree.xml.util.AttributeDefinition; 051 import org.jfree.xml.util.GenericObjectFactory; 052 import org.jfree.xml.util.ObjectDescriptionException; 053 import org.jfree.xml.util.PropertyDefinition; 054 import org.jfree.xml.writer.AbstractXmlWriteHandler; 055 import org.jfree.xml.writer.AttributeList; 056 import org.jfree.xml.writer.RootXmlWriteHandler; 057 import org.jfree.xml.writer.XMLWriter; 058 import org.jfree.xml.writer.XMLWriterException; 059 060 /** 061 * A handler for writing generic objects. 062 */ 063 public class GenericWriteHandler extends AbstractXmlWriteHandler { 064 065 private GenericObjectFactory factory; 066 067 /** 068 * Creates a new handler. 069 * 070 * @param factory the object factory. 071 */ 072 public GenericWriteHandler(final GenericObjectFactory factory) { 073 this.factory = factory; 074 } 075 076 /** 077 * Performs the writing of a generic object. 078 * 079 * @param tagName the tag name. 080 * @param object the generic object. 081 * @param writer the writer. 082 * @param mPlexAttribute ??. 083 * @param mPlexValue ??. 084 * 085 * @throws IOException if there is an I/O error. 086 * @throws XMLWriterException if there is a writer error. 087 */ 088 public void write(final String tagName, final Object object, final XMLWriter writer, 089 final String mPlexAttribute, final String mPlexValue) 090 throws IOException, XMLWriterException { 091 092 try { 093 this.factory.readProperties(object); 094 095 final AttributeList attributes = new AttributeList(); 096 if (mPlexAttribute != null) { 097 attributes.setAttribute(mPlexAttribute, mPlexValue); 098 } 099 final AttributeDefinition[] attribDefs = this.factory.getAttributeDefinitions(); 100 final ArrayList properties = new ArrayList(); 101 for (int i = 0; i < attribDefs.length; i++) { 102 final AttributeDefinition adef = attribDefs[i]; 103 final String pName = adef.getAttributeName(); 104 final Object propValue = this.factory.getProperty(adef.getPropertyName()); 105 if (propValue != null) { 106 Log.debug( 107 "Here: " + this.factory.getBaseClass() + " -> " + adef.getPropertyName() 108 ); 109 final String value = adef.getHandler().toAttributeValue(propValue); 110 if (value != null) { 111 attributes.setAttribute(pName, value); 112 } 113 } 114 properties.add(adef.getPropertyName()); 115 } 116 writer.writeTag(tagName, attributes, false); 117 writer.startBlock(); 118 119 final PropertyDefinition[] propertyDefs = this.factory.getPropertyDefinitions(); 120 final RootXmlWriteHandler rootHandler = getRootHandler(); 121 for (int i = 0; i < propertyDefs.length; i++) { 122 final PropertyDefinition pDef = propertyDefs[i]; 123 final String elementName = pDef.getElementName(); 124 rootHandler.write 125 (elementName, this.factory.getProperty(pDef.getPropertyName()), 126 this.factory.getTypeForTagName(elementName), writer); 127 } 128 writer.endBlock(); 129 writer.writeCloseTag(tagName); 130 } 131 catch (ObjectDescriptionException ode) { 132 Log.warn ("Unable to write element", ode); 133 throw new IOException(ode.getMessage()); 134 } 135 } 136 137 }