#' ISORepresentativeFraction
#'
#' @docType class
#' @importFrom R6 R6Class
#' @export
#' @keywords ISO representative fraction
#' @return Object of \code{\link{R6Class}} for modelling an ISO RepresentativeFraction
#' @format \code{\link{R6Class}} object.
#'
#' @examples
#' fr <- ISORepresentativeFraction$new(denominator = 1L)
#' xml1 <- fr$encode()
#' fr$setDenominator(2L)
#' xml2 <- fr$encode()
#'
#' @references
#' ISO 19115:2003 - Geographic information -- Metadata
#'
#' @author Emmanuel Blondel <emmanuel.blondel1@@gmail.com>
#'
ISORepresentativeFraction <- R6Class("ISORepresentativeFraction",
inherit = ISOAbstractObject,
private = list(
xmlElement = "MD_RepresentativeFraction",
xmlNamespacePrefix = "GMD"
),
public = list(
#'@field denominator denominator
denominator = NULL,
#'@description Initializes object
#'@param xml object of class \link{XMLInternalNode-class}
#'@param denominator denominator
initialize = function(xml = NULL, denominator){
super$initialize(xml = xml)
if(is.null(xml) & !missing(denominator)){
self$setDenominator(denominator)
}
},
#'@description Set denominator
#'@param denominator object of class \link{integer}
setDenominator = function(denominator){
newValue <- denominator
if(!is(denominator, "numeric")){
newValue <- as.numeric(denominator)
if(is.na(newValue)){
stop(sprintf("Value '%s' cannot be coerced to 'numeric'", denominator))
}
}
self$denominator = newValue
}
)
)
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