public const int ThresholdCyclomaticComplexity = 20; //higher for C# than Java due to LINQ
public override ToxicityScore CalculateToxicity(Instance instanceToScore)
{
// Class Level Toxicity
var linesOfCode = ComputeToxicity(instanceToScore.LinesOfCode, ThresholdLinesOfCode);
var classCoupling = ComputeToxicity(instanceToScore.ClassCoupling, ThresholdClassCoupling);
var depthOfInheritance = ComputeToxicity(instanceToScore.DepthOfInheritance, ThresholdDepthOfInheritance);
var numberOfMethods = ComputeToxicity(instanceToScore.Members.Count, ThresholdNumberOfMethods);
double cyclomaticComplexity = 0;
double methodLength = 0;
// Method Level Toxicity
foreach (var method in instanceToScore.Members)
{
cyclomaticComplexity += ComputeToxicity(method.CylomaticComplexity, ThresholdCyclomaticComplexity);
methodLength += ComputeToxicity(method.LinesOfCode, ThresholdMethodLength);
}
// Rationalize
var score = new ToxicityScore
{
LinesOfCode = Rationalize(linesOfCode),
ClassCoupling = Rationalize(classCoupling),
DepthOfInheritance = Rationalize(depthOfInheritance * DepthOfInheritanceFactor),
NumberOfMethods = Rationalize(numberOfMethods),
MethodLength = Rationalize(methodLength),
CyclomaticComplexity = Rationalize(cyclomaticComplexity)
};
score.Toxicity = score.LinesOfCode + score.ClassCoupling + score.DepthOfInheritance +
score.NumberOfMethods + score.MethodLength + score.CyclomaticComplexity;
return(score);
}
public override ToxicityScore CalculateToxicity(Instance instanceToScore)
{
// Class Level Toxicity
var linesOfCode = ComputeToxicity(instanceToScore.LinesOfCode, ThresholdLinesOfCode);
var numberOfMethods = ComputeToxicity(instanceToScore.Members.Count, ThresholdNumberOfMethods);
var innerClassAnonymous = ComputeToxicity(instanceToScore.AnonymousInnerClassLength, ThresholdAnonymousInnerClassLength);
var classDataAbstractionCoupling = ComputeToxicity(instanceToScore.ClassDataAbstractionCoupling, ThresholdClassDataAbstractionCoupling);
var classFanOutComplexity = ComputeToxicity(instanceToScore.ClassFanOutComplexity, ThresholdClassFanOutComplexity);
// Method Level Toxicity
double cyclomaticComplexity = 0;
double methodLength = 0;
double missingDefaultCase = 0;
double booleanComplexity = 0;
double nestedIfDepth = 0;
double nestedTryDepth = 0;
double parameterNumber = 0;
foreach (var method in instanceToScore.Members)
{
cyclomaticComplexity += ComputeToxicity(method.CylomaticComplexity, ThresholdCyclomaticComplexity);
methodLength += ComputeToxicity(method.LinesOfCode, ThresholdMethodLength);
missingDefaultCase += ComputeToxicity(method.MissingDefaultCase, ThresholdDefaultCase);
booleanComplexity += ComputeToxicity(method.BooleanExpressionComplexity, ThresholdBooleanComplexity);
nestedIfDepth += ComputeToxicity(method.NestedIfDepth, ThresholdNestedIfDepth);
nestedTryDepth += ComputeToxicity(method.NestedTryDepth, ThresholdNestedTryDepth);
parameterNumber += ComputeToxicity(method.NumberOfParameters, ThresholdParameterNumber);
}
// Rationalize
var score = new ToxicityScore
{
// class level
LinesOfCode = Rationalize(linesOfCode),
NumberOfMethods = Rationalize(numberOfMethods),
AnonInnerLength = Rationalize(innerClassAnonymous),
ClassDataAbstractionCoupling = Rationalize(classDataAbstractionCoupling),
ClassFanOutComplexity = Rationalize(classFanOutComplexity),
// method level
MethodLength = Rationalize(methodLength),
CyclomaticComplexity = Rationalize(cyclomaticComplexity),
MissingDefaultCase = Rationalize(missingDefaultCase),
BooleanExpressionComplexity = Rationalize(booleanComplexity),
NestedIfDepth = Rationalize(nestedIfDepth),
NestedTryDepth = Rationalize(nestedTryDepth),
NumberOfParameters = Rationalize(parameterNumber)
};
score.Toxicity = score.LinesOfCode + score.NumberOfMethods +
score.ClassFanOutComplexity + score.ClassDataAbstractionCoupling +
score.AnonInnerLength + score.MethodLength + score.CyclomaticComplexity +
score.MissingDefaultCase + score.BooleanExpressionComplexity +
score.NestedIfDepth + score.NestedTryDepth + score.NumberOfParameters;
return(score);
}
public override ToxicityScore CalculateToxicity(Instance instanceToScore)
{
// Class Level Toxicity
var linesOfCode = ComputeToxicity(instanceToScore.LinesOfCode, ThresholdLinesOfCode);
var numberOfMethods = ComputeToxicity(instanceToScore.Members.Count, ThresholdNumberOfMethods);
var methodLength = 0d;
var numberOfParameters = 0d;
var nestedIfDepth = 0d;
var missingDefaultCase = 0d;
var noFallThrough = 0d;
double cyclomaticComplexity = 0;
// Method Level Toxicity
foreach (var method in instanceToScore.Members)
{
cyclomaticComplexity += ComputeToxicity(method.CylomaticComplexity, ThresholdCyclomaticComplexity);
methodLength += ComputeToxicity(method.LinesOfCode, ThresholdMethodLength);
numberOfParameters += ComputeToxicity(method.NumberOfParameters, ThresholdNumberOfParameters);
nestedIfDepth += ComputeToxicity(method.NestedIfDepth, ThresholdNestedIfDepth);
missingDefaultCase += ComputeToxicity(method.MissingDefaultCase, ThresholdMissingDefaultCase);
noFallThrough += ComputeToxicity(method.NoFallthrough, ThresholdNoFallthrough);
}
// Rationalize
var score = new ToxicityScore
{
LinesOfCode = Rationalize(linesOfCode),
NumberOfMethods = Rationalize(numberOfMethods),
MethodLength = Rationalize(methodLength),
CyclomaticComplexity = Rationalize(cyclomaticComplexity),
NumberOfParameters = Rationalize(numberOfParameters),
NestedIfDepth = Rationalize(nestedIfDepth),
MissingDefaultCase = Rationalize(missingDefaultCase),
SwitchNoFallThrough = Rationalize(noFallThrough)
};
score.Toxicity = score.LinesOfCode + score.NumberOfMethods +
score.CyclomaticComplexity + score.NumberOfParameters + score.MethodLength +
score.NestedIfDepth + score.MissingDefaultCase + score.SwitchNoFallThrough;
return(score);
}