Merge pull request #114 from kbss-cvut/fix/108-delete-context-when-sy…

…stem-or-fault-tree-is-deleted

#108 Delete context when fault tree or system is deleted context

src/main/java/cz/cvut/kbss/analysis/dao/BaseDao.java

@@ -58,6 +58,13 @@ public URI getContext(T entity){
         return entity.getContext();
     }
 
+    public void deleteContext(URI context){
+        Objects.requireNonNull(context);
+        em.createNativeQuery("DELETE {GRAPH ?context { ?s ?p ?o}} WHERE {GRAPH ?context { ?s ?p ?o}}")
+                .setParameter("context", context)
+                .executeUpdate();
+    }
+
     public URI getContext(URI uri){
         List<URI> contexts = em.createNativeQuery("SELECT DISTINCT ?context {GRAPH ?context {?uri a ?type}}", URI.class)
                 .setParameter("uri", uri)

src/main/java/cz/cvut/kbss/analysis/dao/GenericDao.java

@@ -114,4 +114,17 @@ public interface GenericDao<T extends HasIdentifier> {
      * @return {@literal true} if entity exists, {@literal false} otherwise
      */
     boolean existsWithPredicate(String predicate, String value);
+
+    /**
+     * Find the context of the entityUri
+     * @param entityUri
+     * @return
+     */
+    URI getContext(URI entityUri);
+
+    /**
+     * Deletes all triples in provided context
+     * @param context
+     */
+    void deleteContext(URI context);
 }

src/main/java/cz/cvut/kbss/analysis/service/ComplexManagedEntityRepositoryService.java

@@ -10,6 +10,7 @@
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.validation.Validator;
 
+import java.net.URI;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.List;
@@ -46,6 +47,13 @@ protected void prePersist(@NonNull T instance) {
     }
 
 
+    @Transactional
+    @Override
+    public void remove(@NonNull URI instanceUri) {
+        URI context = getPrimaryDao().getContext(instanceUri);
+        getPrimaryDao().deleteContext(context);
+    }
+
     @Transactional(readOnly = true)
     public List<T> findAllSummaries(){
         return ((ManagedEntityDao<T>)getPrimaryDao()).findAllSummaries().stream().map(this::postLoad).toList();