michael@0: /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsISupports.idl"
michael@0: 
michael@0: interface rdfITripleVisitor;
michael@0: 
michael@0: /**
michael@0:  * Interface used in RDF to describe data sources.
michael@0:  *
michael@0:  * @status PLASMA
michael@0:  */
michael@0: 
michael@0: [scriptable, uuid(ebce86bd-1568-4a34-a808-9ccf9cde8087)]
michael@0: interface rdfIDataSource : nsISupports
michael@0: {
michael@0:     /**
michael@0:      * Visit all the subject resources in the datasource. The order is
michael@0:      * intederminate and may change from one invocation to the next.
michael@0:      * The subjects will be in the aSubject argument in calls into
michael@0:      * aVisitor, aPredicate and aObject will be null.
michael@0:      * @note Implementations may throw NS_ERROR_NOT_IMPLEMENTED for
michael@0:      * this method, but in this case RDF serializations of this
michael@0:      * datasource will not be possible.
michael@0:      */
michael@0:     void visitAllSubjects(in rdfITripleVisitor aVisitor);
michael@0: 
michael@0:     /**
michael@0:      * Visit all the triples in the datasource. The order is
michael@0:      * intederminate and may change from one invocation to the next.
michael@0:      * @note Implementations may throw NS_ERROR_NOT_IMPLEMENTED for
michael@0:      * this method, but in this case RDF serializations of this
michael@0:      * datasource will not be possible.
michael@0:      */
michael@0:     void visitAllTriples(in rdfITripleVisitor aVisitor);
michael@0: };