/// <summary> Assert from the right side is always going to be from an Alpha node.
///
/// </summary>
/// <param name="">factInstance
/// </param>
/// <param name="">engine
///
/// </param>
public override void assertRight(IFact rfact, Rete engine, IWorkingMemory mem)
{
// Get the memory for the node
HashedNeqAlphaMemory rightmem = (HashedNeqAlphaMemory)mem.getBetaRightMemory(this);
NotEqHashIndex inx = new NotEqHashIndex(NodeUtils.getRightBindValues(binds, rfact));
rightmem.addPartialMatch(inx, rfact);
bool zm = rightmem.zeroMatch(inx);
IGenericMap <Object, Object> leftmem = (IGenericMap <Object, Object>)mem.getBetaLeftMemory(this);
IEnumerator itr = leftmem.Values.GetEnumerator();
while (itr.MoveNext())
{
Index linx = (Index)itr.Current;
if (evaluate(linx.Facts, rfact))
{
if (!zm)
{
try
{
propogateRetract(linx, engine, mem);
}
catch (RetractException e)
{
throw new AssertException("NotJion - " + e.Message);
}
}
}
}
}
/// <summary> Retract from the right works in the following order.
/// 1. Remove the fact from the right memory
/// 2. check which left memory matched
/// 3. propogate the retract
/// </summary>
/// <param name="">factInstance
/// </param>
/// <param name="">engine
///
/// </param>
public override void retractRight(IFact rfact, Rete engine, IWorkingMemory mem)
{
NotEqHashIndex inx = new NotEqHashIndex(NodeUtils.getRightBindValues(binds, rfact));
HashedNeqAlphaMemory rightmem = (HashedNeqAlphaMemory)mem.getBetaRightMemory(this);
// first we Remove the fact from the right
rightmem.removePartialMatch(inx, rfact);
bool zm = rightmem.zeroMatch(inx);
// now we see the left memory matched and Remove it also
IGenericMap <Object, Object> leftmem = (IGenericMap <Object, Object>)mem.getBetaLeftMemory(this);
IEnumerator itr = leftmem.Values.GetEnumerator();
while (itr.MoveNext())
{
Index linx = (Index)itr.Current;
if (evaluate(linx.Facts, rfact))
{
if (zm)
{
try
{
propogateAssert(linx, engine, mem);
}
catch (AssertException e)
{
throw new RetractException("NotJion - " + e.Message);
}
}
}
}
}
/// <summary> assertLeft takes an array of facts. Since the Current join may be
/// joining against one or more objects, we need to pass all
/// previously matched facts.
/// </summary>
/// <param name="">factInstance
/// </param>
/// <param name="">engine
///
/// </param>
public override void assertLeft(Index linx, Rete engine, IWorkingMemory mem)
{
IGenericMap <Object, Object> leftmem = (IGenericMap <Object, Object>)mem.getBetaLeftMemory(this);
leftmem.Put(linx, linx);
// need to think the getLeftValues through better to
// account for cases when a join has no bindings
NotEqHashIndex inx = new NotEqHashIndex(NodeUtils.getLeftBindValues(binds, linx.Facts));
HashedNeqAlphaMemory rightmem = (HashedNeqAlphaMemory)mem.getBetaRightMemory(this);
if (rightmem.zeroMatch(inx))
{
propogateAssert(linx, engine, mem);
}
}