diff -r 14dc2103a631 -r ed1c9f64298a trace/tracebuilder/com.nokia.tracebuilder/src/com/nokia/tracebuilder/rules/TraceParameterRestrictionRule.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trace/tracebuilder/com.nokia.tracebuilder/src/com/nokia/tracebuilder/rules/TraceParameterRestrictionRule.java	Wed Jun 23 14:35:40 2010 +0300
@@ -0,0 +1,48 @@
+/*
+* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+* Interface which can be added to a TraceObject to prevent parameter addition
+*
+*/
+package com.nokia.tracebuilder.rules;
+
+import com.nokia.tracebuilder.model.TraceObjectRule;
+
+/**
+ * Interface which can be used to restrict changes to the parameters of trace
+ * objects
+ * 
+ */
+public interface TraceParameterRestrictionRule extends TraceObjectRule {
+
+	/**
+	 * Called before showing add parameter dialog to user. If this returns
+	 * false, an error message is displayed
+	 * 
+	 * @return true if the dialog can be shown, false if an error message needs
+	 *         to be displayed
+	 */
+	public boolean canAddParameters();
+
+	/**
+	 * Called before removing a parameter. If this returns false, the parameter
+	 * is not removed and error message is displayed
+	 * 
+	 * @return true if the dialog can be shown, false if an error message needs
+	 *         to be displayed
+	 */
+	public boolean canRemoveParameters();
+
+}