Bug 136770 Cannot view report document from web viewer
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
fileName = fileName + SUFFIX_REPORT_DOCUMENT;
		}
		return fileName;
	}
	/**
	 * Get named parameter from http request. parameter names and values are all
	 * in iso-8859-1 format in request.
	 * 
	 * @param request
	 *            incoming http request
	 * @param parameterName
	 *            parameter name in UTF-8 format
	 * @return
	 */
	private static String getParameter( HttpServletRequest request,
			String parameterName )
	{
		return getParameter( request, parameterName, true );
	}
	/**
	 * Get named parameter from http request. parameter names and values are all
	 * in iso-8859-1 format in request.
	 * 
	 * @param request
	 *            incoming http request
	 * @param parameterName
	 *            parameter name
	 * @param isUTF
	 *            is parameter in UTF-8 formator not
	 * @return