First attempt to add gremlin query support

git-svn-id: https://svn.d4science.research-infrastructures.eu/gcube/trunk/information-system/resource-registry@146773 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/informationsystem/resourceregistry/query/Query.java

@@ -22,4 +22,6 @@ public interface Query {
 	public String query(String query, Integer limit, String fetchPlan)
 			throws InvalidQueryException;
 	
+	public String gremlinQuery(String query) throws InvalidQueryException;
+	
 }

src/main/java/org/gcube/informationsystem/resourceregistry/query/QueryImpl.java

@@ -167,7 +167,43 @@ public class QueryImpl implements Query {
 			}
 		}
 		
-		
-		
 	}
+
+	@Override
+	public String gremlinQuery(String query) throws InvalidQueryException {
+		throw new UnsupportedOperationException();
+		/*
+		OGremlinHelper.global().create();
+		
+		ODatabaseDocumentTx oDatabaseDocumentTx = null;
+		try {
+			oDatabaseDocumentTx = ContextUtility
+					.getActualSecurityContextDatabaseTx(PermissionMode.READER);
+			
+			
+			String finalQuery = String.format("select gremlin('%s')", query);
+			OCommandSQL OCommandSQL = new OCommandSQL(finalQuery);
+			OCommandRequest oCommandRequest = oDatabaseDocumentTx.command(OCommandSQL);
+			OBasicResultSet res = oCommandRequest.execute();
+			
+			Iterator iterator = res.iterator();
+			
+			while(iterator.hasNext()){
+				ODocument oDocument = (ODocument) iterator.next();
+				logger.debug("{}", oDocument);
+			}
+			
+			return res.toString();
+			
+		} catch (Exception e) {
+			throw new InvalidQueryException(e.getMessage());
+		} finally {
+			if (oDatabaseDocumentTx != null) {
+				oDatabaseDocumentTx.close();
+			}
+		}
+		*/
+	}
+	
+	
 }