solved an issue on versioning

src/main/java/org/gcube/data/access/storagehub/Utils.java

@@ -59,8 +59,6 @@ import org.gcube.data.access.storagehub.handlers.items.Node2ItemConverter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import net.bull.javamelody.internal.common.LOG;
-
 public class Utils {
 
 	public final static String SERVICE_NAME 				= "home-library";	
@@ -304,18 +302,14 @@ public class Utils {
 	public static void getAllContentIds(Session ses, Set<String> idsToDelete, Item itemToDelete, VersionHandler versionHandler) throws Exception{
 		if (itemToDelete instanceof AbstractFileItem) {
 			Node currentNode = ses.getNodeByIdentifier(itemToDelete.getId());
-			List<NodeType> ntList = Arrays.asList(currentNode.getMixinNodeTypes());
-			boolean isVersioned = false;
-			logger.debug("mixin node type are {}",ntList);
-			for (NodeType nt: ntList)
-				if(nt.getName().equals("mix:versionable")) {
-					isVersioned = true;
-					break;
-				}
-			
-			if (isVersioned) {
-				List<Version> versions = versionHandler.getContentVersionHistory(currentNode, ses);
+			List<Version> versions = null;
+			try {
+				versions = versionHandler.getContentVersionHistory(currentNode, ses);
+			}catch (Exception e) {
+				logger.warn("versions cannot be retrieved for node with id {}",itemToDelete.getId());
+			}	
 
+			if (versions!= null) {
 				versions.forEach(v -> {
 					try {
 						String storageId =v.getFrozenNode().getProperty(NodeProperty.STORAGE_ID.toString()).getString();
@@ -325,10 +319,10 @@ public class Utils {
 						logger.warn("error retreiving sotrageId version for item with id {}",itemToDelete.getId(),e);
 					}
 				});
-				
+
 			} else 
-				logger.info("not versionable node type found of type {}", currentNode.getPrimaryNodeType().toString());
-			
+				logger.info("not versionable node type found of type {}", currentNode.getPrimaryNodeType().getName().toString());
+
 			idsToDelete.add(((AbstractFileItem) itemToDelete).getContent().getStorageId());
 		}else if (itemToDelete instanceof FolderItem) {
 			List<Item> items = Utils.getItemList(ses.getNodeByIdentifier(itemToDelete.getId()), Excludes.GET_ONLY_CONTENT , null, true, null);

src/main/java/org/gcube/data/access/storagehub/services/UserManager.java

@@ -10,10 +10,8 @@ import java.util.function.Predicate;
 
 import javax.inject.Inject;
 import javax.jcr.Node;
-import javax.jcr.NodeIterator;
 import javax.jcr.PathNotFoundException;
 import javax.jcr.RepositoryException;
-import javax.jcr.query.QueryResult;
 import javax.servlet.ServletContext;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
@@ -33,7 +31,6 @@ import org.apache.jackrabbit.api.security.user.Query;
 import org.apache.jackrabbit.api.security.user.QueryBuilder;
 import org.apache.jackrabbit.api.security.user.User;
 import org.apache.jackrabbit.core.security.principal.PrincipalImpl;
-import org.apache.poi.hpsf.Array;
 import org.gcube.common.authorization.control.annotations.AuthorizationControl;
 import org.gcube.common.gxrest.response.outbound.GXOutboundErrorResponse;
 import org.gcube.common.storagehub.model.Excludes;