static ParameterInteraction CreateInteraction(Model <T> model, Expression expression, IList <ParameterBase> parameters, ParameterExpression parameterExpr)
{
Func <T, bool> filter = expression is Expression <Func <T, bool> >?
((Expression <Func <T, bool> >)expression).Compile() :
Expression.Lambda <Func <T, bool> >(expression, parameterExpr).Compile();
var parameterIndices = (from parameter in parameters
select model.Parameters.IndexOf(parameter)).ToList();
parameterIndices.Sort();
ParameterInteraction interaction = new ParameterInteraction(parameterIndices);
List <int[]> valueTable = ParameterInteractionTable <T> .GenerateValueTable(model.Parameters, interaction);
foreach (var valueIndices in valueTable)
{
ValueCombinationState comboState = filter(BuildVariation(model, parameterIndices, valueIndices)) ? ValueCombinationState.Covered : ValueCombinationState.Excluded;
interaction.Combinations.Add(new ValueCombination(valueIndices, interaction)
{
State = comboState
});
}
return(interaction);
}
// helper to implement Constraint.GetExcludeCombinations
internal static ParameterInteraction GetExcludedCombinations <T>(Model model, Constraint constraint, Parameter first, Parameter second, T value, Func <T, T, bool> comparison)
{
Debug.Assert(first != null && model != null && constraint != null && comparison != null);
List <int> parameterIndices = new List <int>();
parameterIndices.Add(model.Parameters.IndexOf(first));
if (second != null)
{
parameterIndices.Add(model.Parameters.IndexOf(second));
}
parameterIndices.Sort();
ParameterInteraction interaction = new ParameterInteraction(parameterIndices);
List <int[]> valueTable = ParameterInteractionTable.GenerateValueTable(model.Parameters, interaction);
foreach (var valueIndices in valueTable)
{
T value1, value2;
value1 = (T)first[valueIndices[0]];
if (second == null)
{
value2 = value;
}
else
{
value2 = (T)second[valueIndices[1]];
}
ValueCombinationState comboState = comparison(value1, value2) ? ValueCombinationState.Covered : ValueCombinationState.Excluded;
interaction.Combinations.Add(new ValueCombination(valueIndices, interaction)
{
State = comboState
});
}
return(interaction);
}
