Added busy and immutable management to delete

src/main/java/it/inaf/oats/vospace/DeleteNodeService.java

@@ -20,13 +20,14 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.EnableTransactionManagement;
 import org.springframework.transaction.annotation.Isolation;
 import it.inaf.ia2.aa.data.User;
+import it.inaf.oats.vospace.exception.InternalFaultException;
+import it.inaf.oats.vospace.exception.NodeBusyException;
 import org.springframework.transaction.annotation.Transactional;
 
 /**
  *
  * @author Nicola Fulvio Calabria <nicola.calabria at inaf.it>
  */
-
 @Service
 @EnableTransactionManagement
 public class DeleteNodeService {
@@ -48,6 +49,16 @@ public class DeleteNodeService {
             throw PermissionDeniedException.forPath(path);
         }
 
+        Long nodeId = nodeDao.getNodeId(path).get();
+
+        if (nodeDao.isBranchBusy(nodeId)) {
+            throw new NodeBusyException(path);
+        }
+
+        if (nodeDao.isBranchImmutable(nodeId)) {
+            throw new InternalFaultException("Target branch contains immutable nodes");
+        }
+
         nodeDao.deleteNode(path);
 
     }
@@ -79,7 +90,9 @@ public class DeleteNodeService {
                 Node mynode = nodeDao.listNode(tmpPath)
                         .orElseThrow(() -> new NodeNotFoundException(tmpPath));
                 if (mynode.getType().equals("vos:LinkNode") && i < pathComponents.size() - 1) // a LinkNode leaf can be deleted
+                {
                     throw new LinkFoundException(tmpPath);
+                }
 
             }