///<summary>
/// If the element is found in the semantic action environment and is not a null pointer, return
/// true. Otherwise, return false.
///</summary>
public override bool Evaluate(SemanticOperationHandler handler)
{
String name = Value;
Scope <Object> theMap = handler.SemanticOperationVariableMap;
return(theMap.ContainsKey(name) && theMap[name] != null);
}
public override void SetNestedOperationState(String name, Object value)
{
foreach (SemanticOperation action in nestedSemanticActionList)
{
SemanticOperationHandler handler = SemanticOperationHandler;
action.SemanticOperationHandler = handler;
handler.SetOperationState(action, name, value);
action.SetNestedOperationState(name, value);
}
}
public SemanticOperationHandler GetSemanticOperationHandler()
{
SemanticOperationHandler result = this.semanticOperationHandler;
if (result == null)
{
ElementState parentES = Parent;
if (parentES != null && parentES is SemanticOperation)
{
SemanticOperation parent = (SemanticOperation)parentES;
result = parent.GetSemanticOperationHandler();
this.semanticOperationHandler = result;
}
}
return(result);
}
public override bool Evaluate(SemanticOperationHandler handler)
{
bool flag = true;
if (checks != null)
{
foreach (Condition check in checks)
{
flag = flag && check.Evaluate(handler);
if (!flag)
{
break;
}
}
}
return(flag);
}
public override void SetNestedOperationState(String name, Object value)
{
if (cases != null)
{
foreach (IfSemanticOperation aCase in cases)
{
SemanticOperationHandler handler = SemanticOperationHandler;
aCase.SemanticOperationHandler = handler;
SemanticOperationHandler.SetOperationState(aCase, name, value);
aCase.SetNestedOperationState(name, value);
}
}
if (otherwise != null)
{
semanticOperationHandler.SetOperationState(otherwise, name, value);
otherwise.SetNestedOperationState(name, value);
}
}
public override bool Evaluate(SemanticOperationHandler handler)
{
return(!check.Evaluate(handler));
}
public virtual bool Evaluate(SemanticOperationHandler handler)
{
Debug.WriteLine("Condition.Evaluate() gets called: this should never happen.");
return(false);
}