// SetUloh1
public CDClassInstance RetrieveReferencedClassInstance(CDClassPool ExecutionSpace)
{
CDClass Class = ExecutionSpace.getClassByName(this.ClassName);
if (Class == null)
{
return(null);
}
CDClassInstance Instance = Class.GetInstanceByID(this.ReferencedInstanceId);
return(Instance);
}
//SetUloh1
// Similar as task above, but this time we set the attribute value to "NewValue" parameter
// But it's not that easy, you need to check if attribute type and NewValue type are the same (e.g. both are integer)
// To do that, you need to find the referencing variable's class (via Scope) and then the attribute's type (vie ExecutionSpace)
// When you know the type of attribute, use EXETypes.IsValidValue to see if you can or cannot assign that value to that attribute
// You assign it in Scope
// Return if you could assign it or not
// EXETypes.determineVariableType()
public Boolean SetAttributeValue(String ReferencingVariableName, String AttributeName, EXEScope Scope, CDClassPool ExecutionSpace, String NewValue)
{
EXEReferencingVariable ReferencingVariable = Scope.FindReferencingVariableByName(ReferencingVariableName);
if (ReferencingVariable == null)
{
return(false);
}
CDClassInstance ClassInstance = ExecutionSpace.GetClassInstanceById(ReferencingVariable.ClassName, ReferencingVariable.ReferencedInstanceId);
if (ClassInstance == null)
{
return(false);
}
CDClass Class = ExecutionSpace.getClassByName(ReferencingVariable.ClassName);
if (Class == null)
{
return(false);
}
CDAttribute Attribute = Class.GetAttributeByName(AttributeName);
if (Attribute == null)
{
return(false);
}
String NewValueType = EXETypes.DetermineVariableType(null, NewValue);
if (!EXETypes.CanBeAssignedToAttribute(AttributeName, Attribute.Type, NewValueType))
{
return(false);
}
ClassInstance.SetAttribute(AttributeName, EXETypes.AdjustAssignedValue(Attribute.Type, NewValue));
return(true);
}
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);
}