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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef nsRDFTestNode_h__
       7             : #define nsRDFTestNode_h__
       8             : 
       9             : #include "nsRuleNetwork.h"
      10             : 
      11             : class nsIRDFResource;
      12             : class nsIRDFNode;
      13             : 
      14             : /**
      15             :  * An abstract base class for all of the RDF-related tests. This interface
      16             :  * allows us to iterate over all of the RDF tests to find the one in the
      17             :  * network that is apropos for a newly-added assertion.
      18             :  */
      19           0 : class nsRDFTestNode : public TestNode
      20             : {
      21             : public:
      22           0 :     explicit nsRDFTestNode(TestNode* aParent)
      23           0 :         : TestNode(aParent) {}
      24             : 
      25             :     /**
      26             :      * Determine whether the node can propagate an assertion
      27             :      * with the specified source, property, and target. If the
      28             :      * assertion can be propagated, aInitialBindings will be
      29             :      * initialized with appropriate variable-to-value assignments
      30             :      * to allow the rule network to start a constrain and propagate
      31             :      * search from this node in the network.
      32             :      *
      33             :      * @return true if the node can propagate the specified
      34             :      * assertion.
      35             :      */
      36             :     virtual bool CanPropagate(nsIRDFResource* aSource,
      37             :                                 nsIRDFResource* aProperty,
      38             :                                 nsIRDFNode* aTarget,
      39             :                                 Instantiation& aInitialBindings) const = 0;
      40             : 
      41             :     /**
      42             :      *
      43             :      */
      44             :     virtual void Retract(nsIRDFResource* aSource,
      45             :                          nsIRDFResource* aProperty,
      46             :                          nsIRDFNode* aTarget) const = 0;
      47             : };
      48             : 
      49             : #endif // nsRDFTestNode_h__