Add support for target tag retrieval via REST (#1782)

Signed-off-by: Marinov Avgustin <Avgustin.Marinov@bosch.com>

hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/management/JpaTargetManagement.java

@@ -19,6 +19,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 import jakarta.persistence.EntityManager;
@@ -178,6 +179,13 @@ public class JpaTargetManagement implements TargetManagement {
         return targetRepository.count();
     }
 
+    @Override
+    public Set<TargetTag> getTagsByControllerId(@NotEmpty String controllerId) {
+        // the method has PreAuthorized by itself
+        return getByControllerID(controllerId).map(JpaTarget.class::cast).map(JpaTarget::getTags)
+                .orElseThrow(() -> new EntityNotFoundException(Target.class, controllerId));
+    }
+
     @Override
     @Transactional
     @Retryable(include = {

hawkbit-repository/hawkbit-repository-jpa/src/test/java/org/eclipse/hawkbit/repository/jpa/AbstractJpaIntegrationTest.java

@@ -207,11 +207,7 @@ public abstract class AbstractJpaIntegrationTest extends AbstractIntegrationTest
     }
 
     protected Set<TargetTag> getTargetTags(final String controllerId) {
-        return targetRepository
-                .findOne(TargetSpecifications.hasControllerId(controllerId))
-                .map(JpaTarget.class::cast)
-                .map(JpaTarget::getTags)
-                .orElseThrow(() -> new EntityNotFoundException(Target.class, controllerId));
+        return targetManagement.getTagsByControllerId(controllerId);
     }
 
     private JpaRollout refresh(final Rollout rollout) {

hawkbit-repository/hawkbit-repository-jpa/src/test/java/org/eclipse/hawkbit/repository/jpa/management/TargetTagManagementTest.java

@@ -201,7 +201,7 @@ class TargetTagManagementTest extends AbstractJpaIntegrationTest {
     }
 
     @SafeVarargs
-    private final <T> Collection<T> concat(final Collection<T>... targets) {
+    private <T> Collection<T> concat(final Collection<T>... targets) {
         final List<T> result = new ArrayList<>();
         Arrays.asList(targets).forEach(result::addAll);
         return result;