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
paramValueObj = this.defaultValues.get( paramName );
				}
				if ( parameter.isMultiValue( ) )
				{
					
					
					if ( paramValueObj == null )
						params.put( paramName, null );
					else
						params.put( paramName, new Object[]{paramValueObj} );
				}
				else
				{
					params.put( paramName, paramValueObj );
				}
			}
		}
		return params;
	}
	/**
	 * Returns parameter default values map
	 * 
	 * @param design
	 * @param parameterList
	 * @param request
	 * @param options
	 * @return
	 * @throws ReportServiceException
	 */
	protected Map getDefaultValues( IViewerReportDesignHandle design,