gecko-dev/rdf/base/nsIRDFDelegateFactory.idl

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*

  An interface used for runtime pseudo-aggregation of RDF delegate
  objects.

*/

#include "nsrootidl.idl"
#include "nsISupports.idl"
interface nsIRDFResource;

/**
 * This interface should be implemented by an XPCOM factory that
 * is registered to handle "@mozilla.org/rdf/delegate-factory/[key]/[scheme];1"
 * ContractIDs.
 *
 * The factory will be invoked to create delegate objects from
 * nsIRDFResource::GetDelegate().
 */
[scriptable, uuid(A1B89470-A124-11d3-BE59-0020A6361667)]
interface nsIRDFDelegateFactory : nsISupports
{
    /**
     * Create a delegate for the specified RDF resource.
     *
     * The created delegate should forward AddRef() and Release()
     * calls to the aOuter object.
     */
    void CreateDelegate(in nsIRDFResource aOuter,
                        in string aKey,
                        in nsIIDRef aIID,
                        [retval, iid_is(aIID)] out nsQIResult aResult);
};