/**
* ========================================
* JFreeReport : a free Java report library
* ========================================
*
* Project Info: http://reporting.pentaho.org/
*
* (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: DefaultLayoutControllerFactory.java 6659 2008-12-02 15:35:06Z tmorgner $
* ------------
* (C) Copyright 2000-2005, by Object Refinery Limited.
* (C) Copyright 2005-2007, by Pentaho Corporation.
*/
package org.jfree.report.flow.layoutprocessor;
import java.util.HashMap;
import java.util.Iterator;
import org.jfree.report.DataSourceException;
import org.jfree.report.ReportDataFactoryException;
import org.jfree.report.ReportProcessingException;
import org.jfree.report.flow.FlowController;
import org.jfree.report.flow.ReportJob;
import org.jfree.report.structure.Node;
import org.pentaho.reporting.libraries.base.config.Configuration;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
/**
* A layout controller factory that selects layout controllers by their node
* implementation type.
*
* @author Thomas Morgner
*/
public class DefaultLayoutControllerFactory implements LayoutControllerFactory
{
private HashMap registry;
private static final String PREFIX = "org.jfree.report.flow.structure.";
public DefaultLayoutControllerFactory()
{
registry = new HashMap();
}
public void initialize (final ReportJob job)
{
final Configuration configuration = job.getConfiguration();
final Iterator propertyKeys =
configuration.findPropertyKeys(DefaultLayoutControllerFactory.PREFIX);
while (propertyKeys.hasNext())
{
final String key = (String) propertyKeys.next();
final String nodeClassName = key.substring
(DefaultLayoutControllerFactory.PREFIX.length());
final String procClassName = configuration.getConfigProperty(key);
final Class nodeClass = load(nodeClassName);
final Object processor = ObjectUtilities.loadAndInstantiate
(procClassName, DefaultLayoutControllerFactory.class, LayoutController.class);
if (nodeClass == null || processor == null)
{
// sanity check ..
continue;
}
registry.put(nodeClassName, procClassName);
}
}
private Class load (final String className)
{
if (className == null)
{
return null;
}
final ClassLoader classLoader = ObjectUtilities.getClassLoader
(DefaultLayoutControllerFactory.class);
try
{
return classLoader.loadClass(className);
}
catch (ClassNotFoundException e)
{
return null;
}
}
public LayoutController create(final FlowController controller,
final Object node,
final LayoutController parent)
throws ReportProcessingException, ReportDataFactoryException, DataSourceException
{
Class nodeClass = node.getClass();
while (Node.class.isAssignableFrom(nodeClass))
{
final String targetClass = (String) registry.get(nodeClass.getName());
if (targetClass != null)
{
final LayoutController lc = (LayoutController)
ObjectUtilities.loadAndInstantiate (targetClass,
DefaultLayoutControllerFactory.class, LayoutController.class);
if (lc != null)
{
lc.initialize(node, controller, parent);
return lc;
}
}
nodeClass = nodeClass.getSuperclass();
}
throw new ReportProcessingException("No processor for node " + node);
}
}