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package org.apache.naming.factory;
import java.util.Hashtable;
import javax.naming.Name;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.naming.Reference;
import javax.naming.RefAddr;
import javax.naming.spi.ObjectFactory;
import org.apache.naming.EjbRef;
/**
* Object factory for EJBs.
*
* @author Remy Maucherat
* @version $Revision: 1.3 $ $Date: 2006/03/12 01:27:12 $
*/
public class EjbFactory
implements ObjectFactory {
// ----------------------------------------------------------- Constructors
// -------------------------------------------------------------- Constants
// ----------------------------------------------------- Instance Variables
// --------------------------------------------------------- Public Methods
// -------------------------------------------------- ObjectFactory Methods
/**
* Crete a new EJB instance.
*
* @param obj The reference object describing the DataSource
*/
public Object getObjectInstance(Object obj, Name name, Context nameCtx,
Hashtable environment)
throws Exception {
if (obj instanceof EjbRef) {
Reference ref = (Reference) obj;
// If ejb-link has been specified, resolving the link using JNDI
RefAddr linkRefAddr = ref.get(EjbRef.LINK);
if (linkRefAddr != null) {
// Retrieving the EJB link
String ejbLink = linkRefAddr.getContent().toString();
Object beanObj = (new InitialContext()).lookup(ejbLink);
// Load home interface and checking if bean correctly
// implements specified home interface
/*
String homeClassName = ref.getClassName();
try {
Class home = Class.forName(homeClassName);
if (home.isInstance(beanObj)) {
if (log.isDebugEnabled())
log.debug("Bean of type "
+ beanObj.getClass().getName()
+ " implements home interface "
+ home.getName());
} else {
if (log.isDebugEnabled())
log.debug("Bean of type "
+ beanObj.getClass().getName()
+ " doesn't implement home interface "
+ home.getName());
throw new NamingException
("Bean of type " + beanObj.getClass().getName()
+ " doesn't implement home interface "
+ home.getName());
}
} catch (ClassNotFoundException e) {
log.warn("Couldn't load home interface "
+ homeClassName, e);
}
*/
return beanObj;
}
ObjectFactory factory = null;
RefAddr factoryRefAddr = ref.get(Constants.FACTORY);
if (factoryRefAddr != null) {
// Using the specified factory
String factoryClassName =
factoryRefAddr.getContent().toString();
// Loading factory
ClassLoader tcl =
Thread.currentThread().getContextClassLoader();
Class factoryClass = null;
if (tcl != null) {
try {
factoryClass = tcl.loadClass(factoryClassName);
} catch(ClassNotFoundException e) {
}
} else {
try {
factoryClass = Class.forName(factoryClassName);
} catch(ClassNotFoundException e) {
}
}
if (factoryClass != null) {
try {
factory = (ObjectFactory) factoryClass.newInstance();
} catch(Throwable t) {
}
}
} else {
String javaxEjbFactoryClassName =
System.getProperty("javax.ejb.Factory",
Constants.OPENEJB_EJB_FACTORY);
try {
factory = (ObjectFactory)
Class.forName(javaxEjbFactoryClassName).newInstance();
} catch(Throwable t) {
}
}
if (factory != null) {
return factory.getObjectInstance
(obj, name, nameCtx, environment);
} else {
throw new NamingException
("Cannot create resource instance");
}
}
return null;
}
}