Bug 147407 Preview the attached report in the web viewer first time and then click the TOC button will cause NPE error
Description: It just can be reprouduced at first time preview. Step to reproduce: 1. please use attach report file 2. preview it in the web viewer 3. click the "Toggle table of contents" button Actual result: As the atteched screenshot shows,There is a NPE error.And if you preview it in the Web viewer again, the phenomenon is disappear.But reopen the eclipse and preview it at first time, it will be occured.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
}
		return filePath;
	}
	/**
	 * Generate document name according to report name.
	 * 
	 * @param request
	 * @return document name.
	 */
	protected static String generateDocumentFromReport(
			HttpServletRequest request )
	{
		String fileName = getReport( request );
		if ( fileName.indexOf( '.' ) >= 0 )
		{
			fileName = fileName.substring( 0, fileName.lastIndexOf( '.' ) )
					+ SUFFIX_REPORT_DOCUMENT;
		}
		else
		{
			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