/*
* 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.ext.factory.base;
import java.lang.reflect.Constructor;
import java.lang.reflect.Modifier;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.compat.CompatibilityMapperUtil;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
/**
* An object-description for a class loader.
*
* @author Thomas Morgner
*/
public class ClassLoaderObjectDescription extends AbstractObjectDescription
{
private static final Class[] EMPTY_PARAMS = new Class[0];
/**
* Creates a new object description.
*/
public ClassLoaderObjectDescription()
{
super(Object.class);
setParameterDefinition("class", String.class);
}
/**
* Creates an object based on this object description.
*
* @return The object.
*/
public Object createObject()
{
try
{
final String o = (String) getParameter("class");
return ObjectUtilities.loadAndInstantiate(CompatibilityMapperUtil.mapClassName(o), getClass(), null);
}
catch (Exception e)
{
return null;
}
}
/**
* Sets the parameters of the object description to match the supplied object.
*
* @param o the object.
* @throws ObjectFactoryException if there is a problem while reading the properties of the given object.
*/
public void setParameterFromObject(final Object o) throws ObjectFactoryException
{
if (o == null)
{
throw new ObjectFactoryException("The Object is null.");
}
try
{
final Constructor c = o.getClass().getConstructor(ClassLoaderObjectDescription.EMPTY_PARAMS);
if (!Modifier.isPublic(c.getModifiers()))
{
throw new ObjectFactoryException
("The given object has no public default constructor. [" + o.getClass() + ']');
}
setParameter("class", o.getClass().getName());
}
catch (Exception e)
{
throw new ObjectFactoryException
("The given object has no default constructor. [" + o.getClass() + ']', e);
}
}
}