Bug 173836 NPE was thrown when click "Preview " button quickly twice[00]
NPE was thrown when click "Preview " button quickly twice[00] Build number: 2.2.0.v20070212-0630 Steps to reproduce: 1.open attached report 2.click "Preview" button quickly twice Expected result: Report can be previewed properly Actual result: NPE was thrown in second preview Error log: see screen shot
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
.get( paramName ) ) );
			}
		}
		return parsedParameters;
	}
	/**
	 * find the parameter handle by parameter name
	 * 
	 * @param paramName
	 * @return
	 * @throws ReportServiceException
	 */
	public ParameterHandle findParameter( String paramName )
			throws ReportServiceException
	{
		return BirtUtility.findParameter( this.reportDesignHandle, paramName );
	}
	/**
	 * find the parameter definition object by parameter name
	 * 
	 * @param paramName
	 * @return
	 */
	public ParameterDefinition findParameterDefinition( String paramName )
	{
		return BirtUtility.findParameterDefinition( this.parameterDefList,
				paramName );
	}
	/**
	 * Returns the report title