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package javax.naming.spi;

import java.util.Hashtable;
import javax.naming.NamingException;

 
This interface represents a builder that creates object factories.

The JNDI framework allows for object implementations to
be loaded in dynamically via object factories.
For example, when looking up a printer bound in the name space,
if the print service binds printer names to References, the printer
Reference could be used to create a printer object, so that
the caller of lookup can directly operate on the printer object
after the lookup.  An ObjectFactory is responsible for creating
objects of a specific type.  JNDI uses a default policy for using
and loading object factories.  You can override this default policy
by calling NamingManager.setObjectFactoryBuilder() with an ObjectFactoryBuilder,
which contains the program-defined way of creating/loading
object factories.
Any ObjectFactoryBuilder implementation must implement this
interface that for creating object factories.
Author:
Rosanna Lee, Scott Seligman
See Also:
ObjectFactory
NamingManager.getObjectInstance
NamingManager.setObjectFactoryBuilder
Since:
1.3/**
  * This interface represents a builder that creates object factories.
  *<p>
  * The JNDI framework allows for object implementations to
  * be loaded in dynamically via <em>object factories</em>.
  * For example, when looking up a printer bound in the name space,
  * if the print service binds printer names to References, the printer
  * Reference could be used to create a printer object, so that
  * the caller of lookup can directly operate on the printer object
  * after the lookup.  An ObjectFactory is responsible for creating
  * objects of a specific type.  JNDI uses a default policy for using
  * and loading object factories.  You can override this default policy
  * by calling <tt>NamingManager.setObjectFactoryBuilder()</tt> with an ObjectFactoryBuilder,
  * which contains the program-defined way of creating/loading
  * object factories.
  * Any <tt>ObjectFactoryBuilder</tt> implementation must implement this
  * interface that for creating object factories.
  *
  * @author Rosanna Lee
  * @author Scott Seligman
  *
  * @see ObjectFactory
  * @see NamingManager#getObjectInstance
  * @see NamingManager#setObjectFactoryBuilder
  * @since 1.3
  */
public interface ObjectFactoryBuilder {
    
Creates a new object factory using the environment supplied.

The environment parameter is owned by the caller.
The implementation will not modify the object or keep a reference
to it, although it may keep a reference to a clone or copy.
Params:
obj – The possibly null object for which to create a factory.
environment – Environment to use when creating the factory.
                Can be null.
Throws:
NamingException – If an object factory cannot be created.
Returns:
A non-null new instance of an ObjectFactory./**
      * Creates a new object factory using the environment supplied.
      *<p>
      * The environment parameter is owned by the caller.
      * The implementation will not modify the object or keep a reference
      * to it, although it may keep a reference to a clone or copy.
      *
      * @param obj The possibly null object for which to create a factory.
      * @param environment Environment to use when creating the factory.
      *                 Can be null.
      * @return A non-null new instance of an ObjectFactory.
      * @exception NamingException If an object factory cannot be created.
      *
      */
    public ObjectFactory createObjectFactory(Object obj,
                                             Hashtable<?,?> environment)
        throws NamingException;
}