diff -r 5b9d4d8641ce -r ae255c9aa552 sysperfana/perfinvestigator/com.nokia.carbide.cpp.pi.wizards/src/com/nokia/carbide/cpp/internal/pi/wizards/model/SessionHandler.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sysperfana/perfinvestigator/com.nokia.carbide.cpp.pi.wizards/src/com/nokia/carbide/cpp/internal/pi/wizards/model/SessionHandler.java	Wed Jun 23 15:05:09 2010 +0300
@@ -0,0 +1,181 @@
+/*
+ * 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 the License "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: 
+ *
+ */
+package com.nokia.carbide.cpp.internal.pi.wizards.model;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.eclipse.core.runtime.IPath;
+
+import com.nokia.carbide.cpp.pi.PiPlugin;
+import com.nokia.carbide.cpp.pi.wizards.WizardsPlugin;
+
+public final class SessionHandler {
+
+	private static final String SESSION_DATA_FILE_NAME = "PerformanceInvestigatorSession.bin"; //$NON-NLS-1$
+	private static final IPath SESSION_DATA_FILE_PATH = PiPlugin.getDefault()
+			.getStateLocation().append(SESSION_DATA_FILE_NAME);
+	private static SessionHandler instance;
+
+	public static SessionHandler getInstance() {
+		if (instance == null) {
+			instance = new SessionHandler();
+		}
+		return instance;
+	}
+
+	private SessionHandler() {
+
+	}
+
+	/**
+	 * Saves given trace files.
+	 * 
+	 * @param files
+	 * @return <code>true</code> if trace files are saved otherwise
+	 *         <code>false</code> is returned
+	 */
+	public boolean saveTraceFiles(List<TraceFile> files) {
+		FileOutputStream fos = null;
+		ObjectOutputStream out = null;
+		try {
+			fos = new FileOutputStream(SESSION_DATA_FILE_PATH.toFile());
+			out = new ObjectOutputStream(fos);
+			out.writeObject(files);
+			out.flush();
+			return true;
+		} catch (Exception e) {
+			e.printStackTrace();
+			return false;
+		} finally {
+			if (fos != null) {
+				try {
+					fos.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+			if (out != null) {
+				try {
+					out.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+		}
+	}
+
+	/**
+	 * Load trace files from storage
+	 * 
+	 * @return array of the trace files
+	 */
+	@SuppressWarnings("unchecked")
+	public TraceFile[] loadTraceFile() {
+		File file = SESSION_DATA_FILE_PATH.toFile();
+		if (!file.exists()) {
+			return new TraceFile[0];
+		}
+		FileInputStream fis = null;
+		ObjectInputStream in = null;
+		try {
+			fis = new FileInputStream(file);
+			in = new ObjectInputStream(fis);
+			List<TraceFile> traceFiles = (List<TraceFile>) in.readObject();
+			return traceFiles.toArray(new TraceFile[0]);
+		} catch (Exception e) {
+			return new TraceFile[0];
+		} finally {
+			if (fis != null) {
+				try {
+					fis.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+			if (in != null) {
+				try {
+					in.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+		}
+	}
+
+	/**
+	 * Removes given file.
+	 * 
+	 * @param traceFile
+	 *            file to be removed
+	 */
+	public void removeTraceFile(TraceFile traceFile) {
+		if (traceFile == null) {
+			return;
+		}
+		List<TraceFile> traceFiles = new ArrayList<TraceFile>();
+		traceFiles.addAll(Arrays.asList(loadTraceFile()));
+		boolean removed = traceFiles.remove(traceFile);
+		if (removed) {
+			WizardsPlugin.getDefault().getPreferenceStore().setValue(
+					traceFile.getTraceFilePath().toString(), false);
+			saveTraceFiles(traceFiles);
+		}
+	}
+	
+	/**
+	 * Get TraceFile with given path.
+	 * 
+	 * @param path
+	 * @return instance of the TraceFile if instance is found with given path
+	 *         otherwise null is returned
+	 */
+	public TraceFile getTraceFile(IPath path) {
+		if (path == null) {
+			return null;
+		}
+		List<TraceFile> traceFiles = new ArrayList<TraceFile>();
+		traceFiles.addAll(Arrays.asList(loadTraceFile()));
+		for (TraceFile traceFile : traceFiles) {
+			if (path.equals(traceFile.getTraceFilePath())) {
+				return traceFile;
+			}
+
+		}
+		return null;
+	}
+	
+	/**
+	 * Add given file.
+	 * 
+	 * @param traceFile
+	 *            file to be added
+	 */
+	public void addTraceFile(TraceFile traceFile) {
+		List<TraceFile> traceFileList = new ArrayList<TraceFile>();
+		traceFileList.addAll(Arrays.asList(loadTraceFile()));
+		traceFileList.add(traceFile);
+		saveTraceFiles(traceFileList);
+	}
+}