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Smell Detectors and Metrics for Cultivate 0.3 Milestone 2
Metric detectors
Structure detectors evaluate certain structures and return a numeric value in a metric specific range for them, if they can be calculated (sometimes division by zero prevents calculation).
Test are contained in prolog-tests/org/cs3/cultivate/pl/metrics/
| Metric | Granularity | Description | Test Case |
|---|---|---|---|
| abstractness | package | number of abstract classes in category ÷ total number of classes in category | AbstractnessTest.java |
| afferent couplings (Ac) | package | number of classes outside this package that depend upon classes within this package | AfferentCouplingTest.java |
| depth of inheritance tree | class | number of steps up to Object in the inheritance tree | DepthOfInheritanceTreeTest.java |
| distance (normalized) | package | Dn = abs(Abstractness + Instability - 1) | DistanceTest.java |
| efferent couplings (Ec) | package | number of classes outside this package that classes within this package depend upon | EfferentCouplingTest.java |
| instability | package | Ec / (Ac + Ec) if Ac + Ec != 0 0 otherwise | InstabilityTest.java |
| lcom2 | class | lack of cohesion of methods (excluding all trivial getters) 1 - (NumberOfMethodsAccessingFields/(NumberOfMethods*NumberOfFields)) | LCOM2Test.java |
| noc | class | number of children (number of direct subclasses) | NOCTest.java |
| number of abstract classes | package | number of abstract classes | NumberOfAbstractClassesTest.java |
| number of classes | package | number of classes, abstract classes and interfaces in a package | NumberOfClassesTest.java |
| number of descendants | class | nod = number of descendants (direct and indirect subclasses) | NumberOfDescendantsTest.java |
| number of interfaces | package | number of interfaces in a package | NumberOfInterfacesTest.java |
| number of overridden methods | class | norm = number of overridden methods | NumberOfOverriddenMethodsTest.java |
| six | class | specialization index (depthOfInheritanceTree*NumberOfOverriddenMethods)/NumberOfMethods | SIXTest.java |
| static test coverage | class | percentage of public methods called by tests | StaticTestCoverageTest.java |
Smell Detectors
Structure detectors detect structures that are bad smells.
Test are contained in prolog-tests/org/cs3/cultivate/pl/smells/
| Smell | Granularity | Description | Test Case |
|---|---|---|---|
| no operation (nop) | statement | empty statements | NopSmellTest.java |
| misnamed testclass | class | test class that's name does not end with “Test” | MisnamedTestclassTest.java |
| sideeffects in getters | method | getters do more than calculate results and return them proposal: categories no side effects, possible side effects, known side effects | SideEffectInGetterTest.java |
| for testers only | method | finds methods that are only used by tests | ForTestersOnlyTest.java |
| package circularity | package | finds all strongly connected package components with more than one package in the package dependency graph |
Structure Detectors
Structure detectors detect structures like inheritance or package dependencies. Their results are used in different diagrams.
Test are contained in prolog-tests/org/cs3/cultivate/pl/structures/
| Structure | Granularity | Description | Test Case |
|---|---|---|---|
| class dependency | class | checks whether on class depends on another or not | ClassDependencyTest.java |
| package dependency | package | ||
| inheritance | class | checks if one class extends another | InheritanceTest.java |
Queries
Queries allow further investigation on certain PEFs from special views, sophisticated java analyzers etc.
Test are contained in prolog-tests/org/cs3/cultivate/pl/queries/
| Query | Granularity | Description | Test Case |
|---|---|---|---|
| full qualified name | |||
| location |
research/cultivate/smelldetectorsandmetrics_v0_3m2.txt · Last modified: 2018/05/09 01:59 (external edit)
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