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#' GMLEnvelopeWithTimePeriod
#'
#' @docType class
#' @importFrom R6 R6Class
#' @export
#' @keywords ISO GML EnvelopeWithTimePeriod
#' @return Object of \code{\link{R6Class}} for modelling an GML envelope with time period
#' @format \code{\link{R6Class}} object.
#'
#' @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>
#'
GMLEnvelopeWithTimePeriod <- R6Class("GMLEnvelopeWithTimePeriod",
inherit = GMLEnvelope,
private = list(
xmlElement = "EnvelopeWithTimePeriod",
xmlNamespacePrefix = "GML"
),
public = list(
#'@field beginPosition begin position
beginPosition = NA,
#'@field endPosition end position
endPosition = NA,
#'@description Initializes a GML envelope with time period. The argument 'bbox' should be
#' a matrix of dim 2,2 giving the x/y min/max values of a bouding box, as returned by
#' \code{bbox} function in package \pkg{sp}.
#'@param xml object of class \link{XMLInternalNode-class}
#'@param element element
#'@param bbox object of class \link{matrix}
#'@param beginPosition begin position, object of class \link{Date} or \link{POSIXct-class}
#'@param endPosition end position, object of class \link{Date} or \link{POSIXct-class}
#'@param srsName SRS name
#'@param srsDimension SRS dimension
#'@param axisLabels axis labels
#'@param uomLabels uom labels
initialize = function(xml = NULL, element = NULL, bbox,
beginPosition, endPosition,
srsName = NULL, srsDimension = NULL,
axisLabels = NULL, uomLabels = NULL){
if(is.null(element)) element <- private$xmlElement
super$initialize(xml, element = element, bbox = bbox,
srsName = srsName, srsDimension = srsDimension,
axisLabels = axisLabels, uomLabels = uomLabels)
if(is.null(xml)){
self$setBeginPosition(beginPosition)
self$setEndPosition(endPosition)
}
},
#'@description Decodes an XML representation
#'@param xml object of class \link{XMLInternalNode-class}
decode = function(xml){
super$decode(xml)
#backward compatibility in case of GML < 3
children <- xmlChildren(xml)
children <- children[names(children)=="timePosition"]
if(length(children)>0){
self$beginPosition <- as.POSIXct(strptime(unlist(strsplit(xmlValue(children[[1]]), " ")), "%Y-%m-%dT%H:%M:%S"), tz = "")
self$endPosition <- as.POSIXct(strptime(unlist(strsplit(xmlValue(children[[2]]), " ")), "%Y-%m-%dT%H:%M:%S"), tz = "")
}
},
#'@description Set begin position
#'@param beginPosition object of class \link{Date} or \link{POSIXct-class}
setBeginPosition = function(beginPosition){
if(!all(class(beginPosition)==c("POSIXct","POSIXt")) | is(beginPosition, "Date")){
stop("Value should be of class ('POSIXct','POSIXt') or 'Date'")
}
self$beginPosition <- GMLElement$create("beginPosition", value = beginPosition)
},
#'@description Set end position
#'@param endPosition object of class \link{Date} or \link{POSIXct-class}
setEndPosition = function(endPosition){
if(!all(class(endPosition)==c("POSIXct","POSIXt")) | is(endPosition, "Date")){
stop("Value should be of class ('POSIXct','POSIXt') or 'Date'")
}
self$endPosition <- GMLElement$create("endPosition", value = endPosition)
}
)
)
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