CK not being able to link class/methods with RMiner data

[mauricioaniche]

Sometimes, our tool can't link the method that was refactored (coming from RMiner) and the metrics that CK extracts.

Below, we'll show some examples for debugging.

[jan-gerling]

Examples

https://github.com/fossasia/open-event-droidgen

2020-03-14 01:10:01 ERROR RefactoringAnalyzer:195 CK did not find the refactored method: onLocationChanged/1[Location] for the refactoring type: Rename Parameter on commit 722a2a94adeff14eb44b70806fb8c5395f6e86ce on class org.fossasia.openevent.fragments.MapsFragment
All methods found by CK: , onCreate/1[Bundle]

2020-03-14 01:10:01 ERROR RefactoringAnalyzer:195 CK did not find the refactored method: onViewCreated/2[View,Bundle] for the refactoring type: Extract Method on commit 722a2a94adeff14eb44b70806fb8c5395f6e86ce on class org.fossasia.openevent.fragments.MapsFragment
All methods found by CK: , onCreate/1[Bundle]

https://github.com/lucko/LuckPerms

2020-03-14 01:28:06 ERROR RefactoringAnalyzer:195 CK did not find the refactored method: contains/1[@NonNull Entry] for the refactoring type: Change Parameter Type on commit bafada4f174f14379c76f317b621790224074294 on class me.lucko.luckperms.api.context.ContextSet
All methods found by CK: , mutableCopy/0, isEmpty/0, immutableCopy/0, iterator/0, getValues/1[String], getAnyValue/1[String], size/0, isImmutable/0, toMap/0, isSatisfiedBy/1[ContextSet], contains/1[Entry], toSet/0, toFlattenedMap/0, containsKey/1[String], contains/2[String,String]

2020-03-14 01:28:06 ERROR RefactoringAnalyzer:195 CK did not find the refactored method: add/1[@NonNull Entry] for the refactoring type: Change Parameter Type on commit bafada4f174f14379c76f317b621790224074294 on class me.lucko.luckperms.api.context.ImmutableContextSet.Builder
All methods found by CK: , add/1[Entry], add/2[String,String], build/0, addAll/1[Iterable], addAll/1[ContextSet]

2020-03-14 01:28:06 ERROR RefactoringAnalyzer:195 CK did not find the refactored method: add/1[@NonNull Entry] for the refactoring type: Change Parameter Type on commit bafada4f174f14379c76f317b621790224074294 on class me.lucko.luckperms.api.context.MutableContextSet
All methods found by CK: , fromSet/1[ContextSet], add/1[Entry], addAll/1[ContextSet], remove/2[String,String], clear/0, of/4[String,String,String,String], fromEntries/1[Iterable], removeAll/1[String], create/0, addAll/1[Iterable], of/2[String,String], add/2[String,String]

[mauricioaniche]

• In commit 722a2a94adeff14eb44b70806fb8c5395f6e86ce, the code doesn't really compile, note the >>>> and ==== indicating that it was a bad merge.

• In the LuckPerms project, I learned that, when we get the method name from RMiner, it might return annotations. Note how all the failures are related to annotations in the parameters, e.g., contains/1[@NonNull Entry]. We have to remove this annotations, as CK doesn't return them. I just implemented it in refactoring-ai/predicting-refactoring-ml@33e1b00.

[jan-gerling]

Examples from stress test 05:

/data-collection_worker_3 2020-03-18 02:33:13 ERROR RefactoringAnalyzer:163 CK did not find the refactored method: drawNode/2[Canvas,BinarySearchTree] for the refactoring type: Rename Variable on commit 2de1313a031155fc5c01e5af479eb3c29a7808d2 on class com.toly1994.ds4android.view.BinarySearchView
All methods found by CK: , removeMin/0, onDraw/1[Canvas], removeMax/0, order/1[OrderType], dataView/1[Canvas], init/0, helpView/1[Canvas], remove/1[E], addData/1[E], BinarySearchView/2[Context,AttributeSet], ctrlView/1[Canvas], drawNode/2[Canvas,Node], getMax/0, setOnBSTClickListener/1[OnBSTClickListener], onTouchEvent/1[MotionEvent], getMin/0, BinarySearchView/1[Context], contains/1[E]

/data-collection_worker_2 2020-03-17 11:44:04 ERROR RefactoringAnalyzer:163 CK did not find the refactored method: onLocationChanged/1[Location] for the refactoring type: Rename Parameter on commit 722a2a94adeff14eb44b70806fb8c5395f6e86ce on class org.fossasia.openevent.fragments.MapsFragment
All methods found by CK: , onCreate/1[Bundle]

/data-collection_worker_2 2020-03-17 11:44:04 ERROR RefactoringAnalyzer:163 CK did not find the refactored method: onViewCreated/2[View,Bundle] for the refactoring type: Extract Method on commit 722a2a94adeff14eb44b70806fb8c5395f6e86ce on class org.fossasia.openevent.fragments.MapsFragment
All methods found by CK: , onCreate/1[Bundle]

[mauricioaniche]

For case 1:

If you see the commit, drawNode is defined as
drawNode(Canvas canvas, BinarySearchTree<TreeNode<E>>.Node node). RMiner is returning BinarySearchTree as the type for the node parameter, but it's actually Node. See the output from RMiner: Rename Variable mLineLen : int to lineLen : int in method private drawNode(canvas Canvas, node BinarySearchTree<TreeNode<E>>) : void in class com.toly1994.ds4android.view.BinarySearchView.

(I informed RMiner folks: tsantalis/RefactoringMiner#91)

For case 2:

Code does not compile. Similar to a previous example we had, where you see that it was a bad merge. See commit.

[mauricioaniche]

Example from the stress test 6 (thanks, @jan-gerling):

/data-collection_worker_3 2020-03-19 14:00:34 ERROR RefactoringAnalyzer:198 CK did not find the refactored method: testGetTask/0 for the refactoring type: Change Variable Type on commit 24d7d29d5526749728544c5ba6bb937760988092 on class de.azapps.mirakel.model.query_builder.QueryBuilderTest/null
All methods found by CK: 
/data-collection_worker_3 2020-03-19 14:00:34 ERROR RefactoringAnalyzer:249 We did not find class de.azapps.mirakel.model.query_builder.QueryBuilderTest/null in CK's output 

I'll debug it.

[mauricioaniche]

First example that I just debugged: we couldn't find the class, because the refactoring is inside an anonymous class. Linking an anonymous class retuned by CK and by RMiner is tricky. See issue in CK: mauricioaniche/ck#54.

[mauricioaniche]

Same thing for this other example. Anonymous class.

[mauricioaniche]

And now, even from the log, I can see the problem directly from the logs. For example, I see me.prettyprint.cassandra.service.KeyspaceImpl.multigetSlice.getCount in the same project. multigetSlice.getCount is clearly an anonymous class inside these methods.

Maybe this is a feature I should implement right now in CK.

[jan-gerling]

And now, even from the log, I can see the problem directly from the logs. For example, I see me.prettyprint.cassandra.service.KeyspaceImpl.multigetSlice.getCount in the same project. multigetSlice.getCount is clearly an anonymous class inside these methods.

Maybe this is a feature I should implement right now in CK.

That's an important edge case, nice if it is handled.

[mauricioaniche]

Shall we close this one? Last one seemed to be about anonymous classes, which we are ignoring now, if I recall correctly, right?