nsIRDFResource

An nsIRDFResource is an object that has unique identity in the
RDF data model. The object’s identity is determined by its URI.

Methods

GetValueConst(aConstValue)

An unscriptable version used to avoid a string copy. Meant
for use as a performance optimization. The string is encoded
in UTF-8.

Init(uri)

This method is called by the nsIRDFService after constructing
a resource object to initialize its URI. You would not normally
call this method directly

EqualsString(aURI)

Determine if the resource has the given URI.

GetDelegate(aKey, aIID, aResult)

Retrieve the “delegate” object for this resource. A resource
may have several delegate objects, each of whose lifetimes is
bound to the life of the resource object.

This method will return the delegate for the given key after
QueryInterface()-ing it to the requested IID.

If no delegate exists for the specified key, this method will
attempt to create one using the component manager. Specifically,
it will combine aKey with the resource’s URI scheme to produce
a ContractID as follows:

component:/rdf/delegate-factory/[key]/[scheme]

This ContractID will be used to locate a factory using the
FindFactory() method of nsIComponentManager. If the nsIFactory
exists, it will be used to create a “delegate factory”; that
is, an object that supports nsIRDFDelegateFactory. The delegate
factory will be used to construct the delegate object.

ReleaseDelegate(aKey)

Force a delegate to be “unbound” from the resource.

Normally, a delegate object’s lifetime will be identical to
that of the resource to which it is bound; this method allows a
delegate to unlink itself from an RDF resource prematurely.

Attributes

Value

The single-byte string value of the resource.
@note THIS IS OBSOLETE. C++ should use GetValueConst and script
should use .valueUTF8

ValueUTF8

The UTF-8 URI of the resource.