1 files changed, 10 insertions, 0 deletions
diff --git a/src/main/java/com/c2kernel/graph/model/GraphableVertex.java b/src/main/java/com/c2kernel/graph/model/GraphableVertex.java
index 7c9adef..b0b74fd 100644
--- a/src/main/java/com/c2kernel/graph/model/GraphableVertex.java
+++ b/src/main/java/com/c2kernel/graph/model/GraphableVertex.java
@@ -5,6 +5,7 @@ package com.c2kernel.graph.model;
 */
 
 
+import com.c2kernel.common.InvalidDataException;
 import com.c2kernel.utils.CastorHashMap;
 import com.c2kernel.utils.KeyValuePair;
 public abstract class GraphableVertex extends Vertex
@@ -25,6 +26,15 @@ public abstract class GraphableVertex extends Vertex
 	{
 		return mProperties;
 	}
+	protected Integer getVersionNumberProperty(String propName) throws InvalidDataException {
+		Object val = getProperties().get(propName);
+		if (val == null || val.equals("") || val.toString().equals("-1")) return null;
+		try {
+			return new Integer(val.toString());
+		} catch (NumberFormatException ex) {
+			throw new InvalidDataException("Invalid version number for property '"+propName+"': "+val.toString(), "");
+		}
+	}
 	public KeyValuePair[] getKeyValuePairs()
 	{
 		return mProperties.getKeyValuePairs();