1 files changed, 9 insertions, 8 deletions
diff --git a/src/main/java/com/c2kernel/collection/AggregationInstance.java b/src/main/java/com/c2kernel/collection/AggregationInstance.java
index 47e7c41..f46b691 100644
--- a/src/main/java/com/c2kernel/collection/AggregationInstance.java
+++ b/src/main/java/com/c2kernel/collection/AggregationInstance.java
@@ -6,6 +6,7 @@ package com.c2kernel.collection;
  */
 
 import com.c2kernel.graph.model.GraphPoint;
+import com.c2kernel.lookup.ItemPath;
 import com.c2kernel.utils.CastorHashMap;
 
 public class AggregationInstance extends Aggregation
@@ -23,23 +24,23 @@ public class AggregationInstance extends Aggregation
 
 
     @Override
-	public AggregationMember addMember(int entityKey, CastorHashMap props, String classProps)
+	public AggregationMember addMember(ItemPath itemPath, CastorHashMap props, String classProps)
         throws MembershipException
     {
-        if( entityKey!=-1 && exists(entityKey))
-            throw new MembershipException(entityKey+" already exists in this collection.");
+        if( itemPath != null && exists(itemPath))
+            throw new MembershipException(itemPath+" already exists in this collection.");
         else
-            return super.addMember(entityKey, props, classProps);
+            return super.addMember(itemPath, props, classProps);
     }
 
     @Override
-	public AggregationMember addMember(int entityKey, CastorHashMap props, String classProps, GraphPoint location, int w, int h)
+	public AggregationMember addMember(ItemPath itemPath, CastorHashMap props, String classProps, GraphPoint location, int w, int h)
         throws MembershipException
     {
-        if( entityKey!=-1 && exists(entityKey))
-			throw new MembershipException(entityKey+" already exists in this collection.");
+        if( itemPath != null && exists(itemPath))
+			throw new MembershipException(itemPath+" already exists in this collection.");
         else
-            return super.addMember(entityKey, props, classProps, location, w, h);
+            return super.addMember(itemPath, props, classProps, location, w, h);
     }
 }