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/* -*- 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/. */
#ifndef nsRDFTestNode_h__
#define nsRDFTestNode_h__
#include "nsRuleNetwork.h"
class nsIRDFResource;
class nsIRDFNode;
/**
* An abstract base class for all of the RDF-related tests. This interface
* allows us to iterate over all of the RDF tests to find the one in the
* network that is apropos for a newly-added assertion.
*/
class nsRDFTestNode : public TestNode
{
public:
explicit nsRDFTestNode(TestNode* aParent)
: TestNode(aParent) {}
/**
* Determine whether the node can propagate an assertion
* with the specified source, property, and target. If the
* assertion can be propagated, aInitialBindings will be
* initialized with appropriate variable-to-value assignments
* to allow the rule network to start a constrain and propagate
* search from this node in the network.
*
* @return true if the node can propagate the specified
* assertion.
*/
virtual bool CanPropagate(nsIRDFResource* aSource,
nsIRDFResource* aProperty,
nsIRDFNode* aTarget,
Instantiation& aInitialBindings) const = 0;
/**
*
*/
virtual void Retract(nsIRDFResource* aSource,
nsIRDFResource* aProperty,
nsIRDFNode* aTarget) const = 0;
};
#endif // nsRDFTestNode_h__
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