001 /**
002 * ========================================
003 * JFreeReport : a free Java report library
004 * ========================================
005 *
006 * Project Info: http://reporting.pentaho.org/
007 *
008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009 *
010 * This library is free software; you can redistribute it and/or modify it under the terms
011 * of the GNU Lesser General Public License as published by the Free Software Foundation;
012 * either version 2.1 of the License, or (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016 * See the GNU Lesser General Public License for more details.
017 *
018 * You should have received a copy of the GNU Lesser General Public License along with this
019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020 * Boston, MA 02111-1307, USA.
021 *
022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023 * in the United States and other countries.]
024 *
025 * ------------
026 * $Id: DatasourceFactoryReadHandler.java,v 1.7 2007/04/01 18:49:27 taqua Exp $
027 * ------------
028 * (C) Copyright 2000-2005, by Object Refinery Limited.
029 * (C) Copyright 2005-2007, by Pentaho Corporation.
030 */
031 package org.jfree.report.modules.factories.report.flow;
032
033 import org.jfree.report.ReportDataFactory;
034 import org.jfree.report.modules.factories.data.base.DataFactoryReadHandler;
035 import org.jfree.resourceloader.Resource;
036 import org.jfree.resourceloader.ResourceCreationException;
037 import org.jfree.resourceloader.ResourceKey;
038 import org.jfree.resourceloader.ResourceKeyCreationException;
039 import org.jfree.resourceloader.ResourceLoadingException;
040 import org.jfree.resourceloader.ResourceManager;
041 import org.jfree.resourceloader.ResourceException;
042 import org.jfree.xmlns.parser.AbstractXmlReadHandler;
043 import org.jfree.xmlns.parser.ParseException;
044 import org.xml.sax.Attributes;
045 import org.xml.sax.SAXException;
046
047 /**
048 * Creation-Date: 10.04.2006, 13:27:47
049 *
050 * @author Thomas Morgner
051 */
052 public class DatasourceFactoryReadHandler extends AbstractXmlReadHandler
053 implements DataFactoryReadHandler
054 {
055 private ReportDataFactory dataFactory;
056
057 public DatasourceFactoryReadHandler()
058 {
059 }
060
061 /**
062 * Starts parsing.
063 *
064 * @param attrs the attributes.
065 * @throws SAXException if there is a parsing error.
066 */
067 protected void startParsing(final Attributes attrs) throws SAXException
068 {
069 super.startParsing(attrs);
070 final String href = attrs.getValue(getUri(), "href");
071 if (href == null)
072 {
073 throw new ParseException("Required attribute 'href' is missing.", getLocator());
074 }
075 final ResourceKey key = getRootHandler().getSource();
076 final ResourceManager manager = getRootHandler().getResourceManager();
077 try
078 {
079 final ResourceKey derivedKey = manager.deriveKey(key, href);
080 final Resource resource = manager.create(derivedKey, null, ReportDataFactory.class);
081 getRootHandler().getDependencyCollector().add(resource);
082 dataFactory = (ReportDataFactory) resource.getResource();
083 }
084 catch (ResourceKeyCreationException e)
085 {
086 throw new ParseException
087 ("Unable to derive key for " + key + " and " + href, getLocator());
088 }
089 catch (ResourceCreationException e)
090 {
091 throw new ParseException
092 ("Unable to parse resource for " + key + " and " + href, getLocator());
093 }
094 catch (ResourceLoadingException e)
095 {
096 throw new ParseException
097 ("Unable to load resource data for " + key + " and " + href, getLocator());
098 }
099 catch (ResourceException e)
100 {
101 throw new ParseException("Unable to parse resource for " + key + " and " + href, getLocator());
102 }
103 }
104
105 public ReportDataFactory getDataFactory()
106 {
107 return dataFactory;
108 }
109
110 /**
111 * Returns the object for this element or null, if this element does not
112 * create an object.
113 *
114 * @return the object.
115 * @throws SAXException if there is a parsing error.
116 */
117 public Object getObject() throws SAXException
118 {
119 return dataFactory;
120 }
121 }