ObjectFactoryBuilder (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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javax.naming.spi
Interface ObjectFactoryBuilder

public interface ObjectFactoryBuilder

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.

Since:: 1.3
See Also:: ObjectFactory, NamingManager.getObjectInstance(java.lang.Object, javax.naming.Name, javax.naming.Context, java.util.Hashtable), NamingManager.setObjectFactoryBuilder(javax.naming.spi.ObjectFactoryBuilder)

Method Summary

ObjectFactory createObjectFactory(Object obj, Hashtable environment)
Creates a new object factory using the environment supplied.

Method Detail

createObjectFactory

public ObjectFactory createObjectFactory(Object obj,
                                         Hashtable environment)
                                  throws NamingException

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.

Parameters:: obj - The possibly null object for which to create a factory.; environment - Environment to use when creating the factory. Can be null.
Returns:: A non-null new instance of an ObjectFactory.
Throws:: NamingException - If an object factory cannot be created.