internal override ConstraintSatisfaction SatisfiesContraint(Model <T> model, ValueCombination combination)
{
if (CachedInteraction == null)
{
GetExcludedCombinations(model);
}
if (CachedInteraction.Parameters.Any((index) => combination.ParameterToValueMap.ContainsKey(index)))
{
// supplied combination is a superset
if (CachedInteraction.Parameters.All((index) => combination.ParameterToValueMap.ContainsKey(index)))
{
var combo = CachedInteraction.Combinations.First((c) => ParameterInteractionTable <T> .MatchCombination(c, combination));
return(combo.State == ValueCombinationState.Excluded ? ConstraintSatisfaction.Unsatisfied : ConstraintSatisfaction.Satisfied);
}
else
{
return(new ConstraintSatisfactionExpressionVisitor(mapExpressionsToRequiredParams).SatisfiesConstraint(Condition, model, combination));
}
}
else
{
// supplied combination is disjoint
return(ConstraintSatisfaction.InsufficientData);
}
}
internal override ConstraintSatisfaction SatisfiesContraint(Model model, ValueCombination combination)
{
if (CachedInteraction == null)
{
GetExcludedCombinations(model);
}
return(InternalConstraintHelpers.SatisfiesContraint(model, combination, CachedInteraction));
}
internal override ConstraintSatisfaction SatisfiesContraint(Model model, ValueCombination combination)
{
ConstraintSatisfaction ifSatisfaction = If.SatisfiesContraint(model, combination);
if (ifSatisfaction == ConstraintSatisfaction.InsufficientData)
{
return(ConstraintSatisfaction.InsufficientData);
}
if (ifSatisfaction == ConstraintSatisfaction.Unsatisfied)
{
return(ConstraintSatisfaction.Satisfied);
}
return(Then.SatisfiesContraint(model, combination));
}
internal override ConstraintSatisfaction SatisfiesContraint(Model model, ValueCombination combination)
{
ConstraintSatisfaction first = First.SatisfiesContraint(model, combination);
ConstraintSatisfaction second = Second.SatisfiesContraint(model, combination);
if (first == ConstraintSatisfaction.Satisfied || second == ConstraintSatisfaction.Satisfied)
{
return(ConstraintSatisfaction.Satisfied);
}
if (first == ConstraintSatisfaction.Unsatisfied && second == ConstraintSatisfaction.Unsatisfied)
{
return(ConstraintSatisfaction.Unsatisfied);
}
return(ConstraintSatisfaction.InsufficientData);
}
internal override ConstraintSatisfaction SatisfiesContraint(Model model, ValueCombination combination)
{
var satisfaction = Condition.SatisfiesContraint(model, combination);
if (satisfaction == ConstraintSatisfaction.InsufficientData)
{
return(ConstraintSatisfaction.InsufficientData);
}
if (satisfaction == ConstraintSatisfaction.Satisfied)
{
return(ConstraintSatisfaction.Unsatisfied);
}
else
{
return(ConstraintSatisfaction.Satisfied);
}
}
internal override ParameterInteraction GetExcludedCombinations(Model <T> model)
{
if (CachedInteraction == null)
{
var taggedValues = GetParametersWithTaggedValues(model);
CachedInteraction = new ParameterInteraction(taggedValues.Select((p) => p.ParameterIndex));
var combinationIndices = ParameterInteractionTable <T> .GenerateValueTable(model.Parameters, CachedInteraction);
foreach (var combinationIndex in combinationIndices)
{
int tagCount = 0;
ValueCombination combination = new ValueCombination(combinationIndex, CachedInteraction);
combination.State = ValueCombinationState.Covered;
for (int i = 0; i < taggedValues.Count; i++)
{
if (taggedValues[i].ValueIndices.BinarySearch(combinationIndex[i]) >= 0)
{
tagCount++;
}
if (tagCount > 1)
{
break;
}
}
if (tagCount > 1)
{
combination.State = ValueCombinationState.Excluded;
}
CachedInteraction.Combinations.Add(combination);
}
}
return(new ParameterInteraction(CachedInteraction));
}
internal override ConstraintSatisfaction SatisfiesContraint(Model <T> model, ValueCombination combination)
{
return(InnerConstraint.SatisfiesContraint(model, combination));
}
public ConstraintSatisfaction SatisfiesConstraint <T>(Expression expression, Model <T> model, ValueCombination combination) where T : new()
{
switch (expression.NodeType)
{
case ExpressionType.AndAlso:
{
var andAlso = (BinaryExpression)expression;
ConstraintSatisfaction left = SatisfiesConstraint(andAlso.Left, model, combination);
if (left == ConstraintSatisfaction.Unsatisfied)
{
return(ConstraintSatisfaction.Unsatisfied);
}
ConstraintSatisfaction right = SatisfiesConstraint(andAlso.Right, model, combination);
if (right == ConstraintSatisfaction.Unsatisfied)
{
return(ConstraintSatisfaction.Unsatisfied);
}
if (left == right)
{
return(left);
}
else
{
return(ConstraintSatisfaction.InsufficientData);
}
}
case ExpressionType.Conditional:
var conditional = (ConditionalExpression)expression;
ConstraintSatisfaction test = SatisfiesConstraint(conditional.Test, model, combination);
if (test == ConstraintSatisfaction.InsufficientData)
{
return(ConstraintSatisfaction.InsufficientData);
}
if (test == ConstraintSatisfaction.Satisfied)
{
return(SatisfiesConstraint(conditional.IfTrue, model, combination));
}
else
{
return(SatisfiesConstraint(conditional.IfFalse, model, combination));
}
case ExpressionType.Lambda:
return(SatisfiesConstraint(((LambdaExpression)expression).Body, model, combination));
case ExpressionType.OrElse:
{
var orElse = (BinaryExpression)expression;
ConstraintSatisfaction left = SatisfiesConstraint(orElse.Left, model, combination);
if (left == ConstraintSatisfaction.Satisfied)
{
return(ConstraintSatisfaction.Satisfied);
}
ConstraintSatisfaction right = SatisfiesConstraint(orElse.Right, model, combination);
if (right == ConstraintSatisfaction.Satisfied)
{
return(ConstraintSatisfaction.Satisfied);
}
if (left == right)
{
return(left);
}
else
{
return(ConstraintSatisfaction.InsufficientData);
}
}
default:
if (!mapExpressionsToRequiredParams.ContainsKey(expression))
{
throw new InternalVariationGenerationException("Expected data for expression not found.");
}
return(InternalConstraintHelpers.SatisfiesContraint(model, combination, mapExpressionsToRequiredParams[expression].Interaction));
}
}
/// <summary> /// Calcultes whether the specified value satisfies the constraint or has insufficient data to do so. /// </summary> /// <param name="model">The model.</param> /// <param name="combination">The value.</param> /// <returns>The calculated result.</returns> internal abstract ConstraintSatisfaction SatisfiesContraint(Model model, ValueCombination combination);
