/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
LastIteration.Value = InitialValue.GetValue(context);
bool stop = false;
while (!stop)
{
int token = context.LocalScope.PushContext();
context.LocalScope.setVariable(LastIteration);
CurrentIteration.Value = Expression.GetValue(context);
context.LocalScope.setVariable(CurrentIteration);
Values.BoolValue stopCondition = Condition.GetValue(context) as Values.BoolValue;
if (stopCondition != null)
{
stop = stopCondition.Val;
}
else
{
AddError("Cannot evaluate condition " + Condition.ToString());
stop = true;
}
context.LocalScope.PopContext(token);
LastIteration.Value = CurrentIteration.Value;
}
return(CurrentIteration.Value);
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <returns></returns>
public override Values.IValue GetValue(InterpretationContext context)
{
Values.IValue retVal = null;
Values.ListValue value = ListExpression.GetValue(context) as Values.ListValue;
if (value != null)
{
int token = PrepareIteration(context);
context.LocalScope.setVariable(AccumulatorVariable);
AccumulatorVariable.Value = InitialValue.GetValue(context);
foreach (Values.IValue v in value.Val)
{
if (v != EFSSystem.EmptyValue)
{
IteratorVariable.Value = v;
if (conditionSatisfied(context))
{
AccumulatorVariable.Value = IteratorExpression.GetValue(context);
}
}
NextIteration();
}
EndIteration(context, token);
retVal = AccumulatorVariable.Value;
}
else
{
AddError("Cannot evaluate list value " + ListExpression.ToString());
}
return(retVal);
}
public string Extract(IRow row)
{
try
{
var field = InitialValue.GetValue(row);
foreach (var filter in Filters)
{
field = filter.Apply(field);
}
return(field);
}
catch (Exception ex)
{ throw new ExtractedValueException(this, row, InitialValue, ex); }
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
IValue retVal = null;
ListValue value = ListExpression.GetValue(context, explain) as ListValue;
if (value != null)
{
int token = PrepareIteration(context);
context.LocalScope.SetVariable(AccumulatorVariable);
AccumulatorVariable.Value = InitialValue.GetValue(context, explain);
foreach (IValue v in value.Val)
{
if (v != EfsSystem.Instance.EmptyValue)
{
// All elements should always be != from EmptyValue
ElementFound = true;
IteratorVariable.Value = v;
if (ConditionSatisfied(context, explain))
{
MatchingElementFound = true;
AccumulatorVariable.Value = IteratorExpression.GetValue(context, explain);
}
}
NextIteration();
}
EndIteration(context, explain, token);
retVal = AccumulatorVariable.Value;
}
else
{
AddError("Cannot evaluate list value " + ListExpression, RuleChecksEnum.ExecutionFailed);
}
return(retVal);
}
/// <summary>
/// Provides the value associated to this Expression
/// </summary>
/// <param name="context">The context on which the value must be found</param>
/// <param name="explain">The explanation to fill, if any</param>
/// <returns></returns>
protected internal override IValue GetValue(InterpretationContext context, ExplanationPart explain)
{
ExplanationPart stabilizeExpressionExplanation = ExplanationPart.CreateSubExplanation(explain, this);
IterationsList = new List <IValue>();
LastIteration.Value = InitialValue.GetValue(context, explain);
int i = 0;
bool stop = false;
while (!stop)
{
i = i + 1;
ExplanationPart iterationExplanation =
ExplanationPart.CreateSubExplanation(stabilizeExpressionExplanation, "Iteration " + i);
ExplanationPart iteratorValueExplanation = ExplanationPart.CreateSubExplanation(iterationExplanation,
"Iteration expression value = ");
int token = context.LocalScope.PushContext();
context.LocalScope.SetVariable(LastIteration);
CurrentIteration.Value = Expression.GetValue(context, iteratorValueExplanation);
ExplanationPart.SetNamable(iteratorValueExplanation, CurrentIteration.Value);
ExplanationPart stopValueExplanation = ExplanationPart.CreateSubExplanation(iterationExplanation,
"Stop expression value = ");
context.LocalScope.SetVariable(CurrentIteration);
BoolValue stopCondition = Condition.GetValue(context, stopValueExplanation) as BoolValue;
ExplanationPart.SetNamable(stopValueExplanation, stopCondition);
if (stopCondition != null)
{
stop = stopCondition.Val;
}
else
{
AddError("Cannot evaluate condition " + Condition, RuleChecksEnum.ExecutionFailed);
stop = true;
}
if (!stop && IterationsList.Exists(x => x.LiteralName == CurrentIteration.Value.LiteralName))
{
// Cycle found !!!
IterationsList.Add(CurrentIteration.Value);
string cycleReport = "Execution cycled: ";
bool keepvalues = false;
foreach (IValue value in IterationsList)
{
if (keepvalues)
{
cycleReport += ", " + value.LiteralName;
}
else if (value.LiteralName == CurrentIteration.Value.LiteralName)
{
keepvalues = true;
cycleReport += value.LiteralName;
}
}
ExplanationPart.CreateSubExplanation(stabilizeExpressionExplanation, cycleReport);
CurrentIteration.Value = EfsSystem.Instance.EmptyValue;
stop = true;
}
else
{
IterationsList.Add(CurrentIteration.Value);
}
context.LocalScope.PopContext(token);
LastIteration.Value = CurrentIteration.Value;
}
ExplanationPart.SetNamable(stabilizeExpressionExplanation, CurrentIteration.Value);
return(CurrentIteration.Value);
}