Bug 155178 [Deploy] Preview report failed on war deployed weblogic server
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
this.parametersAsString = getParsedParametersAsString( parameterList,
				request, options );
		
		this.parameterDefList = getReportService( ).getParameterDefinitions(
				this.reportDesignHandle, options, false );
		
		if ( documentInUrl )
			this.missingParameter = false;
		else
			this.missingParameter = validateParameters( parameterDefList,
					this.parametersAsString );
		
		this.parametersAsString = getParsedParametersAsStringWithDefaultValue(
				this.parametersAsString, request, options );
		
		this.parameters = (HashMap) getParsedParameters(
				this.reportDesignHandle, parameterList, request, options );
		
		this.displayTexts = getDisplayTexts( this.displayTexts, request );
		
		this.moduleOptions = getModuleOptions( request );
	}
	/**
	 * parse paramenters from config file.
	 * 
	 * @param request
	 *            HttpServletRequest
	 * @param parameterList
	 * @return
	 */