--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tracesrv/tracecompiler/src/com.nokia.tracecompiler/src/com/nokia/tracecompiler/source/SourceLocation.java	Fri Oct 08 14:56:39 2010 +0300
@@ -0,0 +1,184 @@
+/*
+* 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:
+*
+* Represents a location in source
+*
+*/
+package com.nokia.tracecompiler.source;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Represents a location in source
+ * 
+ */
+public class SourceLocation extends SourceLocationBase {
+
+	/**
+	 * Location listeners
+	 */
+	private ArrayList<SourceLocationListener> locationListeners;
+
+	/**
+	 * Temporary array for callback purposes. Prevents concurrent modifications
+	 * if listeners are removed during a callback
+	 */
+	private ArrayList<SourceLocationListener> tempListeners;
+
+	/**
+	 * Reference count
+	 */
+	private int refCount = 0;
+
+	/**
+	 * Listener change flag
+	 */
+	private boolean listenersChanged = true;
+
+	/**
+	 * Constructor
+	 * 
+	 * @param parser
+	 *            the parser owning this location
+	 * @param offset
+	 *            offset of location
+	 * @param length
+	 *            length of location
+	 */
+	public SourceLocation(SourceParser parser, int offset, int length) {
+		super(parser, offset, length);
+		parser.addLocation(this);
+		refCount = 1;
+	}
+
+	/**
+	 * Gets the name of the class which owns this location
+	 * 
+	 * @return the class name
+	 */
+	public String getClassName() {
+		String retval = null;
+		if (getParser() != null) {
+			SourceContext context = getParser().getContext(getOffset());
+			if (context != null) {
+				retval = context.getClassName();
+			}
+		}
+		return retval;
+	}
+
+	/**
+	 * Gets the name of function which owns this location
+	 * 
+	 * @return the function name
+	 */
+	public String getFunctionName() {
+		String retval = null;
+		if (getParser() != null) {
+			SourceContext context = getParser().getContext(getOffset());
+			if (context != null) {
+				retval = context.getFunctionName();
+			}
+		}
+		return retval;
+	}
+
+	/**
+	 * Adds a location listener to this location
+	 * 
+	 * @param listener
+	 *            the location listener
+	 */
+	public void addLocationListener(SourceLocationListener listener) {
+		if (locationListeners == null) {
+			locationListeners = new ArrayList<SourceLocationListener>();
+		}
+		locationListeners.add(listener);
+		listenersChanged = true;
+	}
+
+	/**
+	 * Removes a location listener from this location
+	 * 
+	 * @param listener
+	 *            the location listener
+	 */
+	public void removeLocationListener(SourceLocationListener listener) {
+		if (locationListeners != null) {
+			if (locationListeners.remove(listener)) {
+				listenersChanged = true;
+			}
+		}
+	}
+
+	/**
+	 * Gets the listener interfaces
+	 * 
+	 * @return the listeners
+	 */
+	protected Iterator<SourceLocationListener> getListeners() {
+		List<SourceLocationListener> list;
+		if (locationListeners != null) {
+			if (listenersChanged) {
+				listenersChanged = false;
+				if (tempListeners == null) {
+					tempListeners = new ArrayList<SourceLocationListener>();
+				}
+				tempListeners.clear();
+				tempListeners.addAll(locationListeners);
+			}
+			list = tempListeners;
+		} else {
+			list = Collections.emptyList();
+		}
+		return list.iterator();
+	}
+
+	/**
+	 * Increases the reference count of this location.
+	 * 
+	 * @see #dereference()
+	 */
+	public void reference() {
+		refCount++;
+	}
+
+	/**
+	 * Decrements the reference count of this location. When reference count is
+	 * 0, this is removed from source. Note that a location can also be removed
+	 * from source even if it has outstanding references left. In that case it
+	 * can no longer be selected.
+	 */
+	public void dereference() {
+		if (--refCount <= 0) {
+			removeFromSource();
+		}
+	}
+
+	/**
+	 * Removes this location from the source
+	 */
+	private void removeFromSource() {
+		delete();
+		if (getParser() != null) {
+			getParser().removeLocation(this);
+			resetParser();
+		}
+	}
+
+}