Bug 191685 [regression]Set default value doesn't work in Report Parameter[0705]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
else if ( DesignChoiceConstants.PARAM_TYPE_DATETIME.equals( dataType ) )
		{
			formatType = FormatBuilder.DATETIME;
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_DATE.equals( dataType ) )
		{
			formatType = FormatBuilder.DATE;
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_TIME.equals( dataType ) )
		{
			formatType = FormatBuilder.TIME;
		}
		else
		{
			formatType = FormatBuilder.NUMBER;
		}
		FormatBuilder formatBuilder = new FormatBuilder( formatType );
		formatBuilder.setInputFormat( formatCategroy, formatPattern );
		formatBuilder.setPreviewText( defaultValue );
		if ( formatBuilder.open( ) == OK )
		{
			formatCategroy = ( (String[]) formatBuilder.getResult( ) )[0];
			formatPattern = ( (String[]) formatBuilder.getResult( ) )[1];
			updateFormatField( );
			if ( refresh )
			{
				refreshValueTable( );
			}
		}
	}