Complete repository refactoring - method renaming (#575)

* Split Tag management

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Repo method naming schame applied.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* findAll returns slice instead of page.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Complete javadoc.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Allow null values again.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Readability improvements.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Forgot a method.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fixed broken completed filter.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

hawkbit-repository/hawkbit-repository-api/README.md

@@ -3,4 +3,48 @@
 API for repository access. Contains:
 
 - Entity Model
-- Management service API
+- Management service API
+
+## Method naming concept (example target management)
+
+```
+// Count all targets
+Long count()
+
+// Count by filter parameter (example)
+Long countByTargetFilterQuery(@NotEmpty String targetFilterQuery);
+
+//Create entity
+List<Target> create(@NotEmpty Collection<TargetCreate> create)
+Target create(@NotNull TargetCreate create)
+
+//Delete entities (throws EntityNotFoundException if one element does not exist (at least one not found in collection case))
+void delete(@NotEmpty Collection<Long> targetIDs);
+void delete(@NotNull Long targetID);
+void deleteByControllerId(@NotEmpty String controllerId);
+void deleteByControllerId(@NotEmpty Collection<String> controllerId);
+
+//Update Target (throws EntityNotFoundException if one element does not exist (at least one not found in collection case))
+List<Target> update(@NotEmpty Collection<TargetUpdate> update);
+Target update(@NotNull TargetUpdate update);
+
+//Exist
+boolean exists(@NotNull Long targetId)
+boolean existsByAssignedDistributionSet(@NotNull Long distributionSetID);
+
+// Read methods
+// Find one on technical ID (Optional, no EntityNotFoundException)
+Optional<Target> get(@NotNull Long targetId);
+List<Target> get(@NotEmpty Collection<Long> targetId);
+
+// Find one on non-ID but unique constraint (Optional, no EntityNotFoundException)
+Optional<Target> getByControllerID(@NotEmpty String controllerId);
+List<Target> getByControllerID(@NotEmpty Collection<String> controllerId);
+
+// Find one on non-ID but and non unique constraint (Optional, no EntityNotFoundException)
+Optional<Target> findFirstByDescription(@NotEmpty String description);
+
+// Query/search repository (page might be empty, no EntityNotFoundException) (note: pageReq always first in signature)
+Page<Target> findByAssignedDistributionSet(@NotNull Pageable pageReq, @NotNull Long distributionSetID);
+
+```