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65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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The RDF data source observer interface. Data source observers are
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notified when the contents of the graph change.
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*/
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#ifndef nsIRDFObserver_h__
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#define nsIRDFObserver_h__
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#include "nsISupports.h"
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class nsIRDFDataSource;
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class nsIRDFResource;
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class nsIRDFNode;
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/**
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* An observer on an nsIRDFDataSource.
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*/
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// 3cc75360-484a-11d2-bc16-00805f912fe7
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#define NS_IRDFOBSERVER_IID \
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{ 0x3cc75360, 0x484a, 0x11d2, { 0xbc, 0x16, 0x00, 0x80, 0x5f, 0x91, 0x2f, 0xe7 } }
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class nsIRDFObserver : public nsISupports
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{
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public:
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static const nsIID& GetIID() { static nsIID iid = NS_IRDFOBSERVER_IID; return iid; }
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/**
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* Called whenever a new assertion is made in the data source.
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*/
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NS_IMETHOD OnAssert(nsIRDFResource* subject,
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nsIRDFResource* predicate,
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nsIRDFNode* object) = 0;
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/**
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* Called whenever an assertion is removed from the data source.
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*/
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NS_IMETHOD OnUnassert(nsIRDFResource* subject,
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nsIRDFResource* predicate,
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nsIRDFNode* object) = 0;
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};
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#endif /* nsIRDFObserver_h__ */
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