Bug 176786 Issue when use ${env.working.folder} as context path.[0601]
Description: Issue when use ${env.working.folder} as context path Build number:2.2.0.v20070308 Steps to reproduce: 1. Add environment variable as below: env.working.folder(D:\temp\working_folder) env.document.folder (D:\temp\document_folder) env.image.folder(D:\temp\image_folder) 2. Deploy WebViewerExample folder in Tomcat5.5.7 2. Set context parameter as attached with form like ${env.working.folder}. 3. Start Server Expected result: Content inside WebViewerExample folder is untouched. Actual result: After server is started, refresh and check the WebViewerExample folder. Only webcontent and WEB-INF folders are left, other folders and two sample reports disappear. Error log:N/A
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* @param request
	 * @return
	 */
	public static boolean isRtl( HttpServletRequest request )
	{
		boolean isRtl = false;
		if ( "true".equalsIgnoreCase( getParameter( request, PARAM_RTL ) ) ) 
		{
			isRtl = true;
		}
		return isRtl;
	}
	/**
	 * Get report locale from a given string.
	 * 
	 * @param locale
	 *            locale string
	 * @return report locale
	 */
	public static Locale getLocaleFromString( String locale )
	{
		if ( locale == null || locale.length( ) <= 0 )
		{
			return null;
		}
		int index = locale.indexOf( '_' );
		if ( index != -1 )
		{
			String language = locale.substring( 0, index );
			String country = locale.substring( index + 1 );