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
* 
	 * @see org.eclipse.birt.report.context.BaseAttributeBean#getReportTitle()
	 */
	public String getReportTitle( ) throws ReportServiceException
	{
		String title = BirtUtility.getTitleFromDesign( reportDesignHandle );
		if ( title == null || title.trim( ).length( ) <= 0 )
			title = reportTitle;
		return title;
	}
	/**
	 * @return the maxRows
	 */
	public int getMaxRows( )
	{
		return maxRows;
	}
	/**
	 * @return the parametersAsString
	 */
	public Map getParametersAsString( )
	{
		return parametersAsString;
	}
	/**
	 * @return the parameterDefList
	 */
	public Collection getParameterDefList( )
	{
		return parameterDefList;