/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.mx.modelmbean;
import java.lang.reflect.Constructor;
import javax.management.modelmbean.ModelMBean;
import javax.management.modelmbean.ModelMBeanInfo;
import org.jboss.mx.server.ServerConstants;
import org.jboss.mx.util.PropertyAccess;
/**
* ModelMBean instantiator. The ModelMBean implementation
* can be configured by setting a <tt>jbossmx.required.modelmbean.class</tt>
* system property.
*
* @see javax.management.modelmbean.ModelMBean
*
* @author <a href="mailto:juha@jboss.org">Juha Lindfors</a>.
* @author <a href="mailto:Adrian@jboss.org">Adrian Brock</a>.
* @version $Revision: 81019 $
*/
public class RequiredModelMBeanInstantiator
{
public static ModelMBean instantiate()
{
ClassLoader cl = Thread.currentThread().getContextClassLoader();
String className = getClassName();
try
{
Class modelMBean = cl.loadClass(className);
return (ModelMBean) modelMBean.newInstance();
}
catch (ClassNotFoundException e)
{
throw new Error("Cannot instantiate model mbean class. Class " + className + " not found.");
}
catch (ClassCastException e)
{
throw new Error("Cannot instantiate model mbean class. The target class is not an instance of ModelMBean interface.");
}
catch (Exception e)
{
throw new Error("Cannot instantiate model mbean class " + className + " with default constructor: " + e.getMessage());
}
}
public static ModelMBean instantiate(ModelMBeanInfo info)
{
ClassLoader cl = Thread.currentThread().getContextClassLoader();
String className = getClassName();
try
{
Class modelMBean = cl.loadClass(className);
Constructor constructor = modelMBean.getConstructor(new Class[] { ModelMBeanInfo.class });
return (ModelMBean) constructor.newInstance(new Object[] { info });
}
catch (ClassNotFoundException e)
{
throw new Error("Cannot instantiate model mbean class. Class " + className + " not found.");
}
catch (ClassCastException e)
{
throw new Error("Cannot instantiate model mbean class. The target class is not an instance of ModelMBean interface.");
}
catch (Exception e)
{
throw new Error("Cannot instantiate model mbean class " + className + ": " + e.toString());
}
}
public static String getClassName()
{
return PropertyAccess.getProperty
(
ServerConstants.REQUIRED_MODELMBEAN_CLASS_PROPERTY,
ServerConstants.DEFAULT_REQUIRED_MODELMBEAN_CLASS
);
}
}