--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sysperfana/analyzetoolext/com.nokia.s60tools.analyzetool/src/com/nokia/s60tools/analyzetool/engine/ICallstackManager.java	Wed Apr 21 19:42:48 2010 +0300
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2010 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:  Definitions for the class ReadFile
+ *
+ */
+package com.nokia.s60tools.analyzetool.engine;
+
+import java.io.IOException;
+import java.util.List;
+
+import com.nokia.s60tools.analyzetool.engine.statistic.AllocCallstack;
+import com.nokia.s60tools.analyzetool.engine.statistic.BaseInfo;
+
+/**
+ * Interface for access to callstack. This allows the transparent use of either the old-style saving
+ * of callstacks in BaseInfo, or the newer deferred reading of callstacks.
+ */
+public interface ICallstackManager {
+	
+	/**
+	 * Returns the callstack for the given BaseInfo. Note, this should not return null
+	 * if hasCallstack() returns true.
+	 * @param baseInfo  the BaseInfo to use
+	 * @return the callstack for the given BaseInfo
+	 * @throws IOException when problems accessing the .dat file for callstacks
+	 */
+	public List<AllocCallstack> readCallstack(BaseInfo baseInfo) throws IOException;
+
+	/**
+	 * Returns true if the given BaseInfo has a callstack, false otherwise
+	 * @param baseInfo the BaseInfo to use
+	 * @return true if callstack present
+	 */
+	public boolean hasCallstack(BaseInfo baseInfo);
+
+}