Creating Directory Entries
So far, we have been accessing
directory entries that are already present in the directory. Now
it’s time to learn how to create directory entries
of our own, using the createSubcontext( )
method of DirContext
. As we discussed earlier,
when you create a subcontext of a Context
object,
the service provider controls the type of object that is created.
With a DirContext
, this is not the case; you
actually have complete control over the type of object you create
with createSubcontext( )
(within the constraints
of the directory schema, of course).
As noted earlier, the object class definition determines the type of
a directory entry, and the entry stores its object class as an
attribute. So, in order to create a directory entry, we must pass the
object class attribute and some other attributes into the parent
entry’s createSubcontext( )
method.
Most directories require that you specify attributes for at least the
object class definition (e.g.,
“objectclass=”) and key attribute
(e.g., common name, “cn=”) of a
directory entry. Often directories require that you specify more
attributes than just these. The minimum set of attributes necessary
for creating a directory entry are called the mandatory attributes. They are mandatory because if you
don’t specify them, createSubcontext( )
throws an InvalidAttributesException
.
Other attributes that aren’t required, but that add
more useful data to the entry, are called extended attributes.
Say we have a reference to a ...
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