Bug 193467 URL hyperlink can't work in chart viewer
chart/org.eclipse.birt.chart.viewer/src/org/eclipse/birt/chart/viewer/internal/util/ChartImageManager.java
}
	/**
	 * Process folder settings with absolute path. If path is a relative path,
	 * first relative to context. If set canWrite to true, then check the folder
	 * if writable.If not, relative to ${java.io.tmpdir} folder.
	 * 
	 * @param context
	 * @param path
	 * @param defaultPath
	 * @param canWrite
	 * @return
	 */
	private static String processRealPath( ServletContext context, String path,
			boolean canWrite )
	{
		String realPath = null;
		
		if ( !new File( path ).isAbsolute( ) )
		{
			if ( !path.startsWith( "/" ) ) 
				path = "/" + path; 
			realPath = getRealPath( path, context );
			if ( realPath != null && makeDir( realPath ) )
			{
				if ( !canWrite )
					return trimSep( realPath );
				
				try
				{
					if ( canWrite && new File( realPath ).canWrite( ) )