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
return path;
	}
	/**
	 * Returns trim string, not null
	 * 
	 * @param str
	 * @return
	 */
	private static String trimString( String str )
	{
		if ( str == null )
			return ""; 
		return str.trim( );
	}
	/**
	 * Make directory
	 * 
	 * @param path
	 * @return
	 */
	private static boolean makeDir( String path )
	{
		assert path != null;
		File file = new File( path );
		if ( !file.exists( ) )
			return file.mkdirs( );
		return true;
	}
}