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 3048 2007-07-28 18:02:42Z tmorgner $
027: * ------------
028: * (C) Copyright 2000-2005, by Object Refinery Limited.
029: * (C) Copyright 2005-2007, by Pentaho Corporation.
030: */package org.jfree.report.modules.factories.report.flow;
031:
032: import org.jfree.report.ReportDataFactory;
033: import org.jfree.report.modules.factories.data.base.DataFactoryReadHandler;
034: import org.jfree.resourceloader.Resource;
035: import org.jfree.resourceloader.ResourceCreationException;
036: import org.jfree.resourceloader.ResourceKey;
037: import org.jfree.resourceloader.ResourceKeyCreationException;
038: import org.jfree.resourceloader.ResourceLoadingException;
039: import org.jfree.resourceloader.ResourceManager;
040: import org.jfree.resourceloader.ResourceException;
041: import org.jfree.xmlns.parser.AbstractXmlReadHandler;
042: import org.jfree.xmlns.parser.ParseException;
043: import org.xml.sax.Attributes;
044: import org.xml.sax.SAXException;
045:
046: /**
047: * Creation-Date: 10.04.2006, 13:27:47
048: *
049: * @author Thomas Morgner
050: */
051: public class DatasourceFactoryReadHandler extends
052: AbstractXmlReadHandler implements DataFactoryReadHandler {
053: private ReportDataFactory dataFactory;
054:
055: public DatasourceFactoryReadHandler() {
056: }
057:
058: /**
059: * Starts parsing.
060: *
061: * @param attrs the attributes.
062: * @throws SAXException if there is a parsing error.
063: */
064: protected void startParsing(final Attributes attrs)
065: throws SAXException {
066: super .startParsing(attrs);
067: final String href = attrs.getValue(getUri(), "href");
068: if (href == null) {
069: throw new ParseException(
070: "Required attribute 'href' is missing.",
071: getLocator());
072: }
073: final ResourceKey key = getRootHandler().getSource();
074: final ResourceManager manager = getRootHandler()
075: .getResourceManager();
076: try {
077: final ResourceKey derivedKey = manager.deriveKey(key, href);
078: final Resource resource = manager.create(derivedKey, null,
079: ReportDataFactory.class);
080: getRootHandler().getDependencyCollector().add(resource);
081: dataFactory = (ReportDataFactory) resource.getResource();
082: } catch (ResourceKeyCreationException e) {
083: throw new ParseException("Unable to derive key for " + key
084: + " and " + href, getLocator());
085: } catch (ResourceCreationException e) {
086: throw new ParseException("Unable to parse resource for "
087: + key + " and " + href, getLocator());
088: } catch (ResourceLoadingException e) {
089: throw new ParseException(
090: "Unable to load resource data for " + key + " and "
091: + href, getLocator());
092: } catch (ResourceException e) {
093: throw new ParseException("Unable to parse resource for "
094: + key + " and " + href, getLocator());
095: }
096: }
097:
098: public ReportDataFactory getDataFactory() {
099: return dataFactory;
100: }
101:
102: /**
103: * Returns the object for this element or null, if this element does not
104: * create an object.
105: *
106: * @return the object.
107: * @throws SAXException if there is a parsing error.
108: */
109: public Object getObject() throws SAXException {
110: return dataFactory;
111: }
112: }
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