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I want to show all objectclasses present in schema of LDAP Directory to help user to input available objectclasses for adding new entry.
DirContext schema = ctx.getSchema("");
Attributes answer = schema.getAttributes("ClassDefinition/person");
but that shows information about person only.
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Both the JNDI and LDAP models define a hierarchical namespace in which you name objects. Each object in the namespace may have attributes that can be used to search for the object. At this high level, the two models are similar, so it is not surprising that the JNDI maps well to the LDAP.
ObjectClass attribute specifies the object classes of an entry, which (among other things) are used in conjunction with the controlling schema to determine the permitted attributes of an entry. Values of this attribute can be modified by clients, but the 'objectClass' attribute cannot be removed.
A directory schema specifies, among other rules, the types of objects that a directory may have and the mandatory and optional attributes of each object type. The Lightweight Directory Access Protocol (LDAP) version 3 defines a schema based on the X.
top is an abstract object class that is the parent of every LDAP object class. It is the one that defines that every object in LDAP must have an objectClass attribute.
DirContext schema=dcx.getSchema("");
NamingEnumeration bindings = schema.listBindings("ClassDefinition");
while (bindings.hasMore())
{
Binding bd = (Binding)bindings.next();
System.out.println(bd.getName() + ": " + bd.getObject());
}
You can use various other bindings like
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