diff -r ed1c9f64298a -r 5b9d4d8641ce trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/engine/metafile/MetaFileXMLExporter.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/engine/metafile/MetaFileXMLExporter.java	Wed Jun 23 14:49:59 2010 +0300
@@ -0,0 +1,279 @@
+/*
+ * Copyright (c) 2007-2010 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:
+ *
+ * Metadata file Exporter class
+ *
+ */
+package com.nokia.traceviewer.engine.metafile;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.StringWriter;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+
+import org.w3c.dom.Attr;
+import org.w3c.dom.Document;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.SAXException;
+
+import com.nokia.traceviewer.engine.TraceViewerGlobals;
+
+/**
+ * Metadata file Exporter class
+ * 
+ */
+public class MetaFileXMLExporter {
+
+	/**
+	 * File path to use when exporting
+	 */
+	private final String filePath;
+
+	/**
+	 * Output stream writer
+	 */
+	private OutputStreamWriter out;
+
+	/**
+	 * Constructor
+	 * 
+	 * @param filePath
+	 *            file path where to export data
+	 */
+	public MetaFileXMLExporter(String filePath) {
+		this.filePath = filePath;
+
+		createFile();
+	}
+
+	/**
+	 * Exports data
+	 * 
+	 * @return true if exporting succeeds
+	 */
+	public boolean export() {
+		boolean succeeded = false;
+		Document doc = getDocument();
+		Node parent;
+
+		if (doc != null) {
+
+			// Get root node of trace comment rules
+			NodeList list = doc
+					.getElementsByTagName(MetaFileXMLConstants.TRACECOMMENTS_TAG);
+
+			// Doesn't exist, create
+			if (list.getLength() == 0) {
+				parent = doc
+						.createElement(MetaFileXMLConstants.TRACECOMMENTS_TAG);
+				try {
+					doc.appendChild(parent);
+				} catch (Exception e) {
+					parent = null;
+				}
+			} else {
+				parent = list.item(0);
+			}
+
+			// Delete old trace comments
+			if (parent != null) {
+				NodeList filterChilds = parent.getChildNodes();
+				int len = filterChilds.getLength();
+				for (int i = 0; i < len; i++) {
+					parent.removeChild(filterChilds.item(0));
+				}
+
+				// Get trace comments
+				Map<Integer, String> traceComments = TraceViewerGlobals
+						.getTraceViewer().getDataProcessorAccess()
+						.getTraceCommentHandler().getComments();
+
+				// Loop through the trace comments
+				Iterator<Entry<Integer, String>> it = traceComments.entrySet()
+						.iterator();
+				while (it.hasNext()) {
+					Entry<Integer, String> entry = it.next();
+
+					Node newItem = null;
+					newItem = doc
+							.createElement(MetaFileXMLConstants.COMMENT_TAG);
+					NamedNodeMap itemAttributes = newItem.getAttributes();
+					Attr line = doc
+							.createAttribute(MetaFileXMLConstants.LINE_TAG);
+					line.setValue(String.valueOf(entry.getKey()));
+					itemAttributes.setNamedItem(line);
+					newItem.setTextContent(entry.getValue());
+					parent.appendChild(newItem);
+				}
+
+				// Get result from document
+				StreamResult result = getResultFromDocument(doc);
+
+				// Print out
+				String xmlString = result.getWriter().toString();
+				writeFile(xmlString);
+				succeeded = true;
+			}
+		}
+
+		return succeeded;
+	}
+
+	/**
+	 * Creates the file
+	 */
+	public void createFile() {
+		File file = new File(filePath);
+
+		// File doesn't exist, create it
+		if (!file.exists() || file.length() == 0) {
+			createFileSkeleton();
+		} else {
+			// File exists
+		}
+	}
+
+	/**
+	 * Creates XML file skeleton
+	 */
+	private void createFileSkeleton() {
+		try {
+			// Open an Output Stream Writer to set encoding
+			OutputStream fout = new FileOutputStream(filePath);
+			OutputStream bout = new BufferedOutputStream(fout);
+			out = new OutputStreamWriter(bout, "UTF-8"); //$NON-NLS-1$
+
+			out.write(MetaFileXMLConstants.XML_HEADER);
+			out.write(MetaFileXMLConstants.FILE_START);
+			out.write(MetaFileXMLConstants.TRACECOMMENTS_START);
+			out.write(MetaFileXMLConstants.TRACECOMMENTS_END);
+			out.write(MetaFileXMLConstants.FILE_END);
+			out.flush();
+			out.close();
+		} catch (IOException e) {
+		}
+
+	}
+
+	/**
+	 * Writes ready XML string to file
+	 * 
+	 * @param xmlString
+	 */
+	protected void writeFile(String xmlString) {
+
+		try {
+			// Open an Output Stream Writer to set encoding
+			OutputStream fout = new FileOutputStream(filePath);
+			OutputStream bout = new BufferedOutputStream(fout);
+			out = new OutputStreamWriter(bout, "UTF-8"); //$NON-NLS-1$
+
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		try {
+			out.write(xmlString);
+			out.flush();
+			out.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+	/**
+	 * Gets result from document
+	 * 
+	 * @param doc
+	 *            document
+	 * @return result
+	 */
+	protected StreamResult getResultFromDocument(Document doc) {
+		TransformerFactory tf = TransformerFactory.newInstance();
+		int indentSize = 2;
+		tf.setAttribute("indent-number", Integer.valueOf(indentSize)); //$NON-NLS-1$
+		Transformer transformer = null;
+		try {
+			transformer = tf.newTransformer();
+		} catch (TransformerConfigurationException e1) {
+			e1.printStackTrace();
+		}
+		if (transformer != null) {
+			transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //$NON-NLS-1$
+		}
+
+		// initialize StreamResult with File object to save to file
+		StreamResult result = new StreamResult(new StringWriter());
+		DOMSource source = new DOMSource(doc);
+		try {
+			if (transformer != null) {
+				transformer.transform(source, result);
+			}
+		} catch (TransformerException e) {
+			e.printStackTrace();
+		}
+		return result;
+	}
+
+	/**
+	 * Gets DOM document for the file path
+	 * 
+	 * @return document
+	 */
+	protected Document getDocument() {
+		DocumentBuilderFactory docFactory = DocumentBuilderFactory
+				.newInstance();
+		DocumentBuilder docBuilder = null;
+		try {
+			docBuilder = docFactory.newDocumentBuilder();
+		} catch (ParserConfigurationException e) {
+			e.printStackTrace();
+		}
+
+		// Get the document
+		Document doc = null;
+		try {
+			if (docBuilder != null) {
+				File file = new File(filePath);
+				if (file.exists()) {
+					doc = docBuilder.parse(filePath);
+				}
+			}
+		} catch (SAXException e1) {
+			e1.printStackTrace();
+		} catch (IOException e1) {
+			e1.printStackTrace();
+		}
+		return doc;
+	}
+}