diff --git a/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/OperationResult.java b/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/OperationResult.java
index 50884cf..f03c3ad 100644
--- a/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/OperationResult.java
+++ b/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/OperationResult.java
@@ -14,7 +14,7 @@ public class OperationResult implements Serializable {
 	private static final long serialVersionUID = 7612440231512398232L;
 
 	private TRId trId;
-	private ArrayList<String> collateralTableIds;
+	private ArrayList<TRId> collateralTRIds;
 	
 	public OperationResult(){
 		
@@ -23,12 +23,12 @@ public class OperationResult implements Serializable {
 	/**
 	 * 
 	 * @param trId
-	 * @param collateralTableIds
+	 * @param collateralTRIds
 	 */
-	public OperationResult(TRId trId, ArrayList<String> collateralTableIds) {
+	public OperationResult(TRId trId, ArrayList<TRId> collateralTRIds) {
 		super();
 		this.trId = trId;
-		this.collateralTableIds = collateralTableIds;
+		this.collateralTRIds = collateralTRIds;
 	}
 
 	public TRId getTrId() {
@@ -39,20 +39,21 @@ public class OperationResult implements Serializable {
 		this.trId = trId;
 	}
 
-	public ArrayList<String> getCollateralTableIds() {
-		return collateralTableIds;
+	public ArrayList<TRId> getCollateralTRIds() {
+		return collateralTRIds;
 	}
 
-	public void setCollateralTableIds(ArrayList<String> collateralTableIds) {
-		this.collateralTableIds = collateralTableIds;
+	public void setCollateralTRIds(ArrayList<TRId> collateralTRIds) {
+		this.collateralTRIds = collateralTRIds;
 	}
 
 	@Override
 	public String toString() {
-		return "OperationResult [trId=" + trId + ", collateralTableIds="
-				+ collateralTableIds + "]";
+		return "OperationResult [trId=" + trId + ", collateralTRIds="
+				+ collateralTRIds + "]";
 	}
-	
+
+		
 	
 	
 }