Bug 207250 Check blank value for datetime type parameter from url.[0002][0705]
Description: Check blank value for datetime type parameter from url. Build number:2.3.0.v20071023 Steps to reproduce: 1. New a datetime parameter mydt,listbox, tick off isRequired. 2. Preview in external browser and add "&dt=" in url, press enter. Expected result: Error message to indicate blank value isn't allowed for this parameter. Actual result: No error message and blank value is accepted. I tried to new a jsp and use <birt:paramDef> to pass the blank value and the blank value is accepted,too. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
* @param options
	 *            InputOptions
	 * 
	 * @return Map
	 */
	protected Map getParsedParameters( IViewerReportDesignHandle design,
			Collection parameterList, HttpServletRequest request,
			InputOptions options ) throws ReportServiceException
	{
		Map params = new HashMap( );
		if ( parameterList == null || this.parametersAsString == null )
			return params;
		for ( Iterator iter = parameterList.iterator( ); iter.hasNext( ); )
		{
			
			ParameterDefinition parameter = (ParameterDefinition) iter.next( );
			if ( parameter == null )
				continue;
			String paramName = parameter.getName( );
			Object paramObj = this.parametersAsString.get( paramName );
			if ( paramObj != null )
			{
				
				String format = ParameterAccessor
						.getFormat( request, paramName );
				if ( format == null || format.length( ) <= 0 )
				{
					format = parameter.getPattern( );
				}