Bug 581254

Description Dirk Fauth 2022-12-21 05:29:20 EST

Using the DataChangeLayer with the IdIndexKeyHandler, the changed data is identified by a row object via identifier that is retrieved via IRowIdAccessor. If the IRowIdAccessor is a lambda or a method reference, this is not working anymore and produces strange errors like NullPointerExceptions in various places.

The reason is that the type of the objects that are handled by the NatTable is retrieved via reflection by checking the method parameter type of the IRowIdAccessor. If this is a lambda or a method reference, the type is Object, which is not helpful.

To solve this there are three modifications:

1. if the type can not be resolved via IRowIdAccessor, check the type of the objects in the list
2. checking the objects in the list can fail if
  a) the list is initially empty
  b) the list contains subtypes, which would result in a sometimes working scenario
3. If the type can not be resolved (e.g. empty list and lambda) log an error
4. A reliable solution is to add a new constructor where the type can be passed to avoid the reflection