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50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsRDFTestNode_h__
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#define nsRDFTestNode_h__
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#include "nsRuleNetwork.h"
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class nsIRDFResource;
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class nsIRDFNode;
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/**
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* An abstract base class for all of the RDF-related tests. This interface
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* allows us to iterate over all of the RDF tests to find the one in the
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* network that is apropos for a newly-added assertion.
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*/
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class nsRDFTestNode : public TestNode
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{
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public:
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explicit nsRDFTestNode(TestNode* aParent)
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: TestNode(aParent) {}
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/**
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* Determine whether the node can propagate an assertion
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* with the specified source, property, and target. If the
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* assertion can be propagated, aInitialBindings will be
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* initialized with appropriate variable-to-value assignments
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* to allow the rule network to start a constrain and propagate
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* search from this node in the network.
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*
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* @return true if the node can propagate the specified
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* assertion.
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*/
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virtual bool CanPropagate(nsIRDFResource* aSource,
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nsIRDFResource* aProperty,
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nsIRDFNode* aTarget,
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Instantiation& aInitialBindings) const = 0;
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/**
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*
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*/
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virtual void Retract(nsIRDFResource* aSource,
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nsIRDFResource* aProperty,
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nsIRDFNode* aTarget) const = 0;
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};
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#endif // nsRDFTestNode_h__
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