Fix for dumb error

src/main/java/de/hhu/ba/yoshikoWrapper/core/NetworkParser.java

@@ -32,22 +32,27 @@ public class NetworkParser {
 			//Fetch edges
 			List<CyEdge> edges = net.getEdgeList();
 			
-			//Find out if the weights are double or int
-			@SuppressWarnings("unchecked")
-			Class<? extends Number> weightType = (Class<? extends Number>) weightColumn.getType();
 
-			logger.info("Column has type: "+weightType.getName());
+			
 			//Loop over edges
 			for (CyEdge e : edges) {
 				CyRow edgeEntry = net.getRow(e);
+				//Set to default cost
 				double weight = deletionCostDefault;
+				if (weightColumn != null){
 					try {
+						//Find out if the weights are double or int
+						@SuppressWarnings("unchecked")
+						Class<? extends Number> weightType = (Class<? extends Number>) weightColumn.getType();
+						logger.info("Column has type: "+weightType.getName());
 						weight = (double)edgeEntry.get(weightColumn.getName(), weightType);
 					}
 					catch(Exception ex) {
 						//Invalid entry (no entry)
 						logger.info("No valid edit costs defined for: "+edgeEntry.get("name", String.class)+", falling back to default value!");
 					}
+				}
+
 
 				logger.debug("Found Edge: "+edgeEntry.get("name", String.class)+ " with weight:"+weight);