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 2725 2007-04-01 18:49:29Z taqua $ 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 }