/// <summary>
/// Counts the configurations from another sampling strategy.
/// </summary>
/// <returns>the number of configurations from the other sampling strategy</returns>
private int CountConfigurations()
{
int numberConfigs;
string numConfigsValue = this.strategyParameter[NUM_CONFIGS];
// Only "asTW" is currently supported
if (numConfigsValue.Contains(AS_TW))
{
numConfigsValue = numConfigsValue.Replace(AS_TW, "").Trim();
int t;
int.TryParse(numConfigsValue, out t);
TWise tw = new TWise();
numberConfigs = tw.generateT_WiseVariants_new(GlobalState.varModel, t).Count;
}
else
{
throw new ArgumentException("Only asTW is currently supported.");
}
return(numberConfigs);
}
private List <Configuration> buildConfigs(VariabilityModel vm, List <SamplingStrategies> binaryStrats, List <ExperimentalDesign> numericStrats, List <HybridStrategy> hybridStrats)
{
List <Configuration> result = new List <Configuration>();
List <List <BinaryOption> > binaryConfigs = new List <List <BinaryOption> >();
List <Dictionary <NumericOption, Double> > numericConfigs = new List <Dictionary <NumericOption, double> >();
foreach (SamplingStrategies strat in binaryStrats)
{
switch (strat)
{
//Binary sampling heuristics
case SamplingStrategies.ALLBINARY:
if (optionsToConsider.ContainsKey(SamplingStrategies.ALLBINARY))
{
List <List <BinaryOption> > variants =
vg.GenerateAllVariantsFast(vm.reduce(optionsToConsider[SamplingStrategies.ALLBINARY]));
binaryConfigs.AddRange(changeModel(vm, variants));
}
else
{
binaryConfigs.AddRange(vg.GenerateAllVariantsFast(vm));
}
break;
case SamplingStrategies.SAT:
int numberSamples = 2;
foreach (Dictionary <string, string> parameters in binaryParams.satParameters)
{
if (parameters.ContainsKey("henard"))
{
try
{
bool b = Boolean.Parse(parameters["henard"]);
((Z3VariantGenerator)vg).henard = b;
}
catch (FormatException e)
{
Console.Error.WriteLine(e);
}
}
if (parameters.ContainsKey("numConfigs"))
{
try
{
numberSamples = Int32.Parse(parameters["numConfigs"]);
}
catch (FormatException)
{
TWise tw = new TWise();
numberSamples = tw.generateT_WiseVariants_new(GlobalState.varModel, Int32.Parse(parameters["numConfigs"].Remove(0, 4))).Count;
}
}
if (parameters.ContainsKey("seed") && vg is Z3VariantGenerator)
{
uint seed = 0;
seed = UInt32.Parse(parameters["seed"]);
((Z3VariantGenerator)vg).setSeed(seed);
}
if (optionsToConsider.ContainsKey(SamplingStrategies.SAT))
{
List <List <BinaryOption> > variants =
vg.GenerateUpToNFast(vm.reduce(optionsToConsider[SamplingStrategies.SAT]), numberSamples);
binaryConfigs.AddRange(changeModel(vm, variants));
}
else
{
binaryConfigs.AddRange(vg.GenerateUpToNFast(vm, numberSamples));
}
numberSamples = 2;
}
break;
case SamplingStrategies.BINARY_RANDOM:
RandomBinary rb;
if (optionsToConsider.ContainsKey(SamplingStrategies.BINARY_RANDOM))
{
rb = new RandomBinary(vm.reduce(optionsToConsider[SamplingStrategies.BINARY_RANDOM]));
}
else
{
rb = new RandomBinary(vm);
}
foreach (Dictionary <string, string> expDesignParamSet in binaryParams.randomBinaryParameters)
{
binaryConfigs.AddRange(changeModel(vm, rb.getRandomConfigs(expDesignParamSet)));
}
break;
case SamplingStrategies.OPTIONWISE:
{
FeatureWise fw = new FeatureWise();
if (optionsToConsider.ContainsKey(SamplingStrategies.OPTIONWISE))
{
List <List <BinaryOption> > variants = fw.generateFeatureWiseConfigurations(GlobalState.varModel
.reduce(optionsToConsider[SamplingStrategies.OPTIONWISE]));
binaryConfigs.AddRange(changeModel(vm, variants));
}
else
{
binaryConfigs.AddRange(fw.generateFeatureWiseConfigurations(GlobalState.varModel));
}
}
break;
case SamplingStrategies.DISTANCE_BASED:
foreach (Dictionary <string, string> parameters in binaryParams.distanceMaxParameters)
{
DistanceBased distSampling = new DistanceBased(vm);
binaryConfigs.AddRange(distSampling.getSample(parameters));
}
break;
//case SamplingStrategies.MINMAX:
// {
// MinMax mm = new MinMax();
// binaryConfigs.AddRange(mm.generateMinMaxConfigurations(GlobalState.varModel));
// }
// break;
case SamplingStrategies.PAIRWISE:
{
PairWise pw = new PairWise();
if (optionsToConsider.ContainsKey(SamplingStrategies.PAIRWISE))
{
List <List <BinaryOption> > variants = pw.generatePairWiseVariants(GlobalState.varModel
.reduce(optionsToConsider[SamplingStrategies.PAIRWISE]));
binaryConfigs.AddRange(changeModel(vm, variants));
}
else
{
binaryConfigs.AddRange(pw.generatePairWiseVariants(GlobalState.varModel));
}
}
break;
case SamplingStrategies.NEGATIVE_OPTIONWISE:
{
NegFeatureWise neg = new NegFeatureWise(); //2nd option: neg.generateNegativeFWAllCombinations(GlobalState.varModel));
if (optionsToConsider.ContainsKey(SamplingStrategies.NEGATIVE_OPTIONWISE))
{
List <List <BinaryOption> > variants = neg.generateNegativeFW(GlobalState.varModel
.reduce(optionsToConsider[SamplingStrategies.NEGATIVE_OPTIONWISE]));
binaryConfigs.AddRange(changeModel(vm, variants));
}
else
{
binaryConfigs.AddRange(neg.generateNegativeFW(GlobalState.varModel));
}
}
break;
case SamplingStrategies.T_WISE:
foreach (Dictionary <string, string> ParamSet in binaryParams.tWiseParameters)
{
TWise tw = new TWise();
int t = 3;
foreach (KeyValuePair <String, String> param in ParamSet)
{
if (param.Key.Equals(TWise.PARAMETER_T_NAME))
{
t = Convert.ToInt16(param.Value);
}
if (optionsToConsider.ContainsKey(SamplingStrategies.T_WISE))
{
List <List <BinaryOption> > variants = tw.generateT_WiseVariants_new(
vm.reduce(optionsToConsider[SamplingStrategies.T_WISE]), t);
binaryConfigs.AddRange(changeModel(vm, variants));
}
else
{
binaryConfigs.AddRange(tw.generateT_WiseVariants_new(vm, t));
}
}
}
break;
}
}
//Experimental designs for numeric options
if (numericStrats.Count != 0)
{
handleDesigns(numericStrats, numericConfigs, vm);
}
foreach (List <BinaryOption> binConfig in binaryConfigs)
{
if (numericConfigs.Count == 0)
{
Configuration c = new Configuration(binConfig);
result.Add(c);
}
foreach (Dictionary <NumericOption, double> numConf in numericConfigs)
{
Configuration c = new Configuration(binConfig, numConf);
result.Add(c);
}
}
// Filter configurations based on the NonBooleanConstraints
List <Configuration> filtered = new List <Configuration>();
foreach (Configuration conf in result)
{
bool isValid = true;
foreach (NonBooleanConstraint nbc in vm.NonBooleanConstraints)
{
if (!nbc.configIsValid(conf))
{
isValid = false;
}
}
if (isValid)
{
filtered.Add(conf);
}
}
result = filtered;
// Hybrid designs
if (hybridStrats.Count != 0)
{
existingConfigurations = new List <Configuration>(result);
List <Configuration> configurations = ExecuteHybridStrategy(hybridStrats, vm);
if (numericStrats.Count == 0 && binaryStrats.Count == 0)
{
result = configurations;
}
else
{
// Prepare the previous sample sets
if (result.Count == 0 && binaryConfigs.Count == 0)
{
foreach (Dictionary <NumericOption, double> numConf in numericConfigs)
{
Configuration c = new Configuration(new Dictionary <BinaryOption, BinaryOption.BinaryValue>(), numConf);
result.Add(c);
}
}
if (hybridStrats.Count > 1)
{
// TODO handling of more than one hybrid strategy
throw new NotImplementedException("Handling more than one hybrid strategy has not been fully implemented yet!");
}
HybridStrategy hybridStrategy = hybridStrategies.First();
if (hybridStrategy.GetSamplingParameters(DistributionSensitive.ONLY_BINARY).Equals("true") && binaryStrats.Count > 0 ||
hybridStrategy.GetSamplingParameters(DistributionSensitive.ONLY_NUMERIC).Equals("true") && numericStrats.Count > 0)
{
result.AddRange(configurations);
}
else
{
// Build the cartesian product
List <Configuration> newResult = new List <Configuration>();
foreach (Configuration config in result)
{
foreach (Configuration hybridConfiguration in configurations)
{
Dictionary <BinaryOption, BinaryOption.BinaryValue> binOpts = new Dictionary <BinaryOption, BinaryOption.BinaryValue>(config.BinaryOptions);
Dictionary <NumericOption, double> numOpts = new Dictionary <NumericOption, double>(config.NumericOptions);
Dictionary <BinaryOption, BinaryOption.BinaryValue> hybridBinOpts = hybridConfiguration.BinaryOptions;
foreach (BinaryOption binOpt in hybridConfiguration.BinaryOptions.Keys)
{
binOpts.Add(binOpt, hybridBinOpts[binOpt]);
}
Dictionary <NumericOption, double> hybridNumOpts = hybridConfiguration.NumericOptions;
foreach (NumericOption numOpt in hybridConfiguration.NumericOptions.Keys)
{
numOpts.Add(numOpt, hybridNumOpts[numOpt]);
}
newResult.Add(new Configuration(binOpts, numOpts));
}
}
result = newResult;
}
}
}
if (vm.MixedConstraints.Count == 0)
{
if (binaryStrats.Count == 1 && binaryStrats.Last().Equals(SamplingStrategies.ALLBINARY) && numericStrats.Count == 1 && numericStrats.Last() is FullFactorialDesign)
{
return(replaceReference(result.ToList()));
}
return(replaceReference(result.Distinct().ToList()));
}
List <Configuration> unfilteredList = result.Distinct().ToList();
List <Configuration> filteredConfiguration = new List <Configuration>();
foreach (Configuration toTest in unfilteredList)
{
bool isValid = true;
foreach (MixedConstraint constr in vm.MixedConstraints)
{
if (!constr.configIsValid(toTest))
{
isValid = false;
}
}
if (isValid)
{
filteredConfiguration.Add(toTest);
}
}
return(replaceReference(filteredConfiguration));
}
public static List <Configuration> buildConfigs(VariabilityModel vm, List <SamplingStrategies> binaryStrategies,
List <ExperimentalDesign> experimentalDesigns)
{
List <Configuration> result = new List <Configuration>();
VariantGenerator vg = new VariantGenerator();
List <List <BinaryOption> > binaryConfigs = new List <List <BinaryOption> >();
List <Dictionary <NumericOption, Double> > numericConfigs = new List <Dictionary <NumericOption, double> >();
foreach (SamplingStrategies strat in binaryStrategies)
{
switch (strat)
{
//Binary sampling heuristics
case SamplingStrategies.ALLBINARY:
binaryConfigs.AddRange(vg.generateAllVariantsFast(vm));
break;
case SamplingStrategies.BINARY_RANDOM:
RandomBinary rb = new RandomBinary(vm);
foreach (Dictionary <string, string> expDesignParamSet in binaryParams.randomBinaryParameters)
{
binaryConfigs.AddRange(rb.getRandomConfigs(expDesignParamSet));
}
break;
case SamplingStrategies.OPTIONWISE:
{
FeatureWise fw = new FeatureWise();
binaryConfigs.AddRange(fw.generateFeatureWiseConfigurations(GlobalState.varModel));
}
break;
//case SamplingStrategies.MINMAX:
// {
// MinMax mm = new MinMax();
// binaryConfigs.AddRange(mm.generateMinMaxConfigurations(GlobalState.varModel));
// }
// break;
case SamplingStrategies.PAIRWISE:
{
PairWise pw = new PairWise();
binaryConfigs.AddRange(pw.generatePairWiseVariants(GlobalState.varModel));
}
break;
case SamplingStrategies.NEGATIVE_OPTIONWISE:
{
NegFeatureWise neg = new NegFeatureWise(); //2nd option: neg.generateNegativeFWAllCombinations(GlobalState.varModel));
binaryConfigs.AddRange(neg.generateNegativeFW(GlobalState.varModel));
}
break;
case SamplingStrategies.T_WISE:
foreach (Dictionary <string, string> ParamSet in binaryParams.tWiseParameters)
{
TWise tw = new TWise();
int t = 3;
foreach (KeyValuePair <String, String> param in ParamSet)
{
if (param.Key.Equals(TWise.PARAMETER_T_NAME))
{
t = Convert.ToInt16(param.Value);
}
binaryConfigs.AddRange(tw.generateT_WiseVariants_new(vm, t));
}
}
break;
}
}
//Experimental designs for numeric options
if (experimentalDesigns.Count != 0)
{
handleDesigns(experimentalDesigns, numericConfigs, vm);
}
foreach (List <BinaryOption> binConfig in binaryConfigs)
{
if (numericConfigs.Count == 0)
{
Configuration c = new Configuration(binConfig);
result.Add(c);
}
foreach (Dictionary <NumericOption, double> numConf in numericConfigs)
{
Configuration c = new Configuration(binConfig, numConf);
result.Add(c);
}
}
if (vm.MixedConstraints.Count == 0)
{
return(result.Distinct().ToList());
}
else
{
List <Configuration> unfilteredList = result.Distinct().ToList();
List <Configuration> filteredConfiguration = new List <Configuration>();
foreach (Configuration toTest in unfilteredList)
{
bool isValid = true;
foreach (MixedConstraint constr in vm.MixedConstraints)
{
if (!constr.requirementsFulfilled(toTest))
{
isValid = false;
}
}
if (isValid)
{
filteredConfiguration.Add(toTest);
}
}
return(filteredConfiguration);
}
}