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#' GMLPoint
#'
#' @docType class
#' @importFrom R6 R6Class
#' @export
#' @keywords ISO GML Point
#' @return Object of \code{\link{R6Class}} for modelling an GML point
#' @format \code{\link{R6Class}} object.
#'
#' @note Experimental
#'
#' @references
#' ISO 19136:2007 Geographic Information -- Geographic Markup Language.
#' http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=32554
#'
#' OGC Geography Markup Language. http://www.opengeospatial.org/standards/gml
#'
#' @author Emmanuel Blondel <emmanuel.blondel1@@gmail.com>
#'
GMLPoint <- R6Class("GMLPoint",
inherit = GMLAbstractGeometricPrimitive,
private = list(
xmlElement = "Point",
xmlNamespacePrefix = "GML"
),
public = list(
#'@field pos matrix of positions
pos = matrix(NA_real_, 1, 2),
#'@description Initializes object
#'@param xml object of class \link{XMLInternalNode-class}
#'@param sfg simple feature geometry from \pkg{sf}
#'@param m simple object of class \link{matrix}
initialize = function(xml = NULL, sfg = NULL, m = NULL){
super$initialize(xml, element = private$xmlElement, wrap = TRUE)
if(is.null(xml)){
if(!is.null(sfg)){
if(!all(sapply(c("sfg","POINT"), function(x){is(sfg, x)}))) stop("Input 'sfg' object should be a 'point'")
m <- as.matrix(sfg)
}else if(!is.null(m)){
if(!is.matrix(m)){
stop("The argument 'm' should a matrix")
}
}
self$pos <- m
self$setAttr("srsDimension", as.character(dim(m)[2]))
}
}
)
)
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