Interface DirStateFactory

public interface DirStateFactory
extends StateFactory

This interface represents a factory for obtaining the state of an object and corresponding attributes for binding.

The JNDI framework allows for object implementations to be loaded in dynamically via object factories.

A DirStateFactory extends StateFactory by allowing an Attributes instance to be supplied to and be returned by the getStateToBind() method. DirStateFactory implementations are intended to be used by DirContext service providers. When a caller binds an object using DirContext.bind(), he might also specify a set of attributes to be bound with the object. The object and attributes to be bound are passed to the getStateToBind() method of a factory. If the factory processes the object and attributes, it returns a corresponding pair of object and attributes to be bound. If the factory does not process the object, it must return null.

For example, a caller might bind a printer object with some printer-related attributes.

ctx.rebind("inky", printer, printerAttrs);

An LDAP service provider for ctx uses a DirStateFactory (indirectly via DirectoryManager.getStateToBind()) and gives it printer and printerAttrs. A factory for an LDAP directory might turn printer into a set of attributes and merge that with printerAttrs. The service provider then uses the resulting attributes to create an LDAP entry and updates the directory.

Since DirStateFactory extends StateFactory, it has two getStateToBind() methods, where one differs from the other by the attributes argument. DirectoryManager.getStateToBind() will only use the form that accepts the attributes argument, while NamingManager.getStateToBind() will only use the form that does not accept the attributes argument.

Either form of the getStateToBind() method of a DirStateFactory may be invoked multiple times, possibly using different parameters. The implementation is thread-safe.

Methods

getStateToBind

DirStateFactory.Result getStateToBind(Object obj,
                                      Name name,
                                      Context nameCtx,
                                      Hashtable<?,?> environment,
                                      Attributes inAttrs)
                               throws NamingException

Parameters:

obj - A possibly null object whose state is to be retrieved.

name - The name of this object relative to nameCtx, or null if no name is specified.

nameCtx - The context relative to which the name parameter is specified, or null if name is relative to the default initial context.

environment - The possibly null environment to be used in the creation of the object's state.

inAttrs - The possibly null attributes to be bound with the object. The factory must not modify inAttrs.

Returns:

A Result containing the object's state for binding and the corresponding attributes to be bound; null if the object don't use this factory.

Throws:

NamingException - If this factory encountered an exception while attempting to get the object's state, and no other factories are to be tried.

See Also:

DirectoryManager.getStateToBind(java.lang.Object, javax.naming.Name, javax.naming.Context, java.util.Hashtable<?, ?>, javax.naming.directory.Attributes)