public List <long> Evaluate(CDRelationshipPool RelationshipSpace, EXEScope Scope)
{
List <long> Result = null;
EXEReferenceHandle StartVariable = Scope.FindReferenceHandleByName(this.StartingVariable);
if (StartVariable != null && this.RelationshipSpecification.Any())
{
List <long> CurrentIds = StartVariable.GetReferencedIds();
if (CurrentIds == null)
{
return(null);
}
String CurrentClass = StartVariable.ClassName;
foreach (EXERelationshipLink RelationshipLink in this.RelationshipSpecification)
{
if (CurrentIds == null || !CurrentIds.Any())
{
break;
}
CurrentIds = RelationshipLink.RetrieveIds(CurrentIds, CurrentClass, RelationshipSpace);
CurrentClass = RelationshipLink.ClassName;
}
Result = CurrentIds;
}
return(Result);
}
public bool VerifyReferences(EXEScope Scope, CDClassPool ExecutionSpace)
{
bool Result = false;
EXEExpressionEvaluator Evaluator = new EXEExpressionEvaluator();
EXEEvaluatorHandleOperators HandleEvaluator = new EXEEvaluatorHandleOperators();
EXEReferenceEvaluator AccessEvaluator = new EXEReferenceEvaluator();
// If we just calculate with ints, reals, bools, strings
if (Evaluator.IsSimpleOperator(this.Operation))
{
foreach (EXEASTNode Operand in this.Operands)
{
if (!Operand.VerifyReferences(Scope, ExecutionSpace))
{
return(false);
}
}
Result = true;
}
// If we have handle operators
else if (HandleEvaluator.IsHandleOperator(this.Operation))
{
if (this.Operands.Count() == 1 && Scope.FindReferenceHandleByName(((EXEASTNodeLeaf)this.Operands[0]).GetNodeValue()) != null)
{
Result = true;
}
}
// If we have access operator - we either access attribute or have decimal number. There are always 2 operands
else if (".".Equals(this.Operation) && this.Operands.Count == 2)
{
if (EXETypes.IntegerTypeName.Equals(EXETypes.DetermineVariableType("", this.Operands[0].GetNodeValue())) &&
EXETypes.IntegerTypeName.Equals(EXETypes.DetermineVariableType("", this.Operands[1].GetNodeValue()))
)
{
Result = true;
}
else if (EXETypes.ReferenceTypeName.Equals(EXETypes.DetermineVariableType("", this.Operands[0].GetNodeValue())) &&
EXETypes.ReferenceTypeName.Equals(EXETypes.DetermineVariableType("", this.Operands[1].GetNodeValue()))
)
{
EXEReferencingVariable Variable = Scope.FindReferencingVariableByName(this.Operands[0].GetNodeValue());
if (Variable == null)
{
return(false);
}
CDClass Class = ExecutionSpace.getClassByName(Variable.ClassName);
if (Class == null)
{
return(false);
}
CDAttribute Attribute = Class.GetAttributeByName(this.Operands[1].GetNodeValue());
if (Attribute == null)
{
return(false);
}
CDClassInstance Instance = Variable.RetrieveReferencedClassInstance(ExecutionSpace);
if (Instance == null)
{
return(false);
}
Result = true;
}
}
return(Result);
}
