refs 2409

refs 2446

- Add and register {@link RemoveDuplicatedAnnotationsMigrationProvider} that removes duplicated {@link IAnnotatedSpecification}s from a model. These have been observed for a couple of models and might indicate an internal problem.

- Add MigrationUtils: Utility methods for implementation of drop-in replacement migrations of (sub-types of) types defined in org.fortiss.tooling.base.

refs 2449

- Introduce a separate base class for composing IModelElements. It manages (among other things) the instantiation of annotations.
- Let HierarchicElementCompositorBase inherit from the newly created base class for IModelElements.

refs 2228

Added a comment in ObjectAwareServiceBase#getRegisteredHandlers stating that this method should be changed if the behavior (from AnntotationValueService) is reused in the future.
refs 2270

- If the creation of new annotations should be wrapped into a command, but the annotation already exists, avoid the usage of a command and just directly return the (already existing) annotation.
- This avoids superfluous model modifications (i.e., the project marked dirty and requires saving)
refs 2369

- When inserting copies of objects as a result of a copy&paste operation, the inserted model elements is shifted by an offset. This gives visual feedback to the user that the paste operation has actually been performed.
- Notes:
 + Some model types are not handled yet (see ticket)
 + Although maybe an obvious approach, this feature cannot be implemented as a method in HierarchicElementCompositorBase:
   o It is not the base class of all affected compositors
   o HierarchicElementCompositorBase resides in org.fortiss.tooling.base, where as the required methods for detailing with layout information are in org.fortiss.tooling.base.ui
refs 2344

refs 2240

- Add IAnnotationValueProvider.isHidden() that allows to hide annotations from any view (useful for internal attributes that should not be exposed to the user). Default = false
- Extend AnnotationEntry and AnnotationFilter accordingly

- Prevent pollution of AnnotationEntry <-> IModelElement cache via instantiateAnnotations(final IModelElement element) (which might be invoked from model transformations). I.e., the cache is only updated, when the AnnotationEntries are queried from the GUI context.
- In case further measures need to be taken to limit the size of the AnnotationEntry <-> IModelElement cache, <http://stackoverflow.com/questions/2941283/java-fixed-memory-map> might be a good starting point

- Add prefix "generated-" for directories of generated edit and editor code (not used in default AF3 distribution)

- Undo last two changes: will be handled by ElementCompositorService (in the kernel)

refs 2309

refs 2309

- Assign unique IDs to annotations as soon as the are instantiated (before, annotations relied on the ID-fixup that is triggered when the model is persisted)
refs 2309

Fixes a bug in the EStructuralFeatureValueProvider that caused the Enum filter list to be applied on objects that should not be filtered.

Adds the possibility to filter the list of available choices for an enum-type annotation via the annotation's value provider.
Therefore, a map containing the class of the to be filtered model elements and the allowed enum literal must be given in the constructor of the value provider.

DerivedAnnotationValueProviderBase.setAnnotationValue(): Convert String-encoded input to actual data type

refs 2240

generalize RequirementSpecificationUtils.removeRequirementSpecifications() to 
BaseModelElementUtils.removeModelElementReferenceSpecifications()
  
refs 2240

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