Confusing warning when saving/retrieving object with custom Value Converter

[isalvadori]

When saving/retrieving an object with a data type that needs a custom ValueConverter to be registered, a warning logging appears, coming from the EObjectBuilderImpl, saying something like

WARNING: Error detected invalid Mongo - Ecore data type combination: Mongo: STRING, Ecore: org.eclipse.emf.ecore.impl.EDataTypeImpl@79308a2 (name: ELocalDate) (instanceClassName: java.time.LocalDate) (serializable: true) InstanceClassName null. Maybe use the ValueConverter for that.

The logging is confusing since the check for a proper ValueConverter seems to be done afterwards, resulting in the object properly saved/retrieved. So there should not be the need for that warning in the first place.

[isalvadori]

Fixed in https://github.com/geckoprojects-org/org.gecko.emf.persistence/tree/issue15-confusing-warning-value-converter.
The warning message is still there, but now it does not read as alarming as before. It just warns the user that he/she should have taken care of registering a custom ValueConverter to handle the otherwise possible incompatible type detected.