/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.modules.parser.extwriter;
import java.io.IOException;
import org.pentaho.reporting.engine.classic.core.filter.DataSource;
import org.pentaho.reporting.engine.classic.core.modules.parser.ext.ExtParserModule;
import org.pentaho.reporting.engine.classic.core.modules.parser.ext.factory.base.ObjectDescription;
import org.pentaho.reporting.engine.classic.core.modules.parser.ext.factory.datasource.DataSourceCollector;
import org.pentaho.reporting.libraries.xmlns.writer.XmlWriter;
import org.pentaho.reporting.libraries.xmlns.writer.XmlWriterSupport;
/**
* A data-source writer. Writes datasources and templates.
*
* @author Thomas Morgner.
*/
public class DataSourceWriter extends ObjectWriter
{
/**
* The data-source.
*/
private DataSourceCollector dataSourceCollector;
/**
* Creates a new writer.
*
* @param reportWriter the report writer.
* @param baseObject the base object.
* @param objectDescription the object description.
* @param indent the current indention level.
* @throws ReportWriterException if an error occured.
* @throws IllegalArgumentException if the object description does not describe a datasource.
*/
public DataSourceWriter(final ReportWriterContext reportWriter,
final DataSource baseObject,
final ObjectDescription objectDescription,
final XmlWriter indent)
throws ReportWriterException
{
super(reportWriter, baseObject, objectDescription, indent);
if (DataSource.class.isAssignableFrom(objectDescription.getObjectClass()) == false)
{
throw new IllegalArgumentException("Expect a datasource description, but got "
+ objectDescription.getObjectClass());
}
dataSourceCollector = getReportWriter().getDataSourceCollector();
}
/**
* Writes a parameter.
*
* @param name the name.
* @throws IOException if there is an I/O problem.
* @throws ReportWriterException if the report definition could not be written.
*/
protected void writeParameter(final String name)
throws IOException, ReportWriterException
{
if ("dataSource".equals(name) == false)
{
super.writeParameter(name);
return;
}
final DataSource ds = (DataSource) getObjectDescription().getParameter(name);
final ObjectDescription dsDesc = getParameterDescription(name);
final String dsname = dataSourceCollector.getDataSourceName(dsDesc);
if (dsname == null)
{
throw new ReportWriterException("The datasource type is not registered: "
+ ds.getClass());
}
final XmlWriter writer = getXmlWriter();
writer.writeTag(ExtParserModule.NAMESPACE, AbstractXMLDefinitionWriter.DATASOURCE_TAG,
"type", dsname, XmlWriterSupport.OPEN);
final DataSourceWriter dsWriter =
new DataSourceWriter(getReportWriter(), ds, dsDesc, writer);
dsWriter.write();
writer.writeCloseTag();
}
}