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#9 GetCoverage extended/tested to WCS versions
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| #' WCSCoverage | ||
| #' | ||
| #' @docType class | ||
| #' @export | ||
| #' @keywords OGC WCS Coverage | ||
| #' @return Object of \code{\link{R6Class}} modelling a WCS coverage | ||
| #' @format \code{\link{R6Class}} object. | ||
| #' | ||
| #' @note Class used internally by ows4R. | ||
| #' | ||
| #' @author Emmanuel Blondel <emmanuel.blondel1@@gmail.com> | ||
| #' | ||
| WCSCoverage <- R6Class("WCSCoverage", | ||
| inherit = OGCAbstractObject, | ||
| private = list( | ||
| identifier = NA, | ||
| title = NA, | ||
| abstract = NA, | ||
| reference = NA, | ||
|
|
||
| #fetchCoverage | ||
| fetchCoverage = function(xmlObj, serviceVersion, owsVersion){ | ||
| children <- xmlChildren(xmlObj) | ||
| covIdentifier <- NULL | ||
| if(!is.null(children$Identifier)){ | ||
| covIdentifier <- xmlValue(children$Identifier) | ||
| } | ||
| covTitle <- NULL | ||
| if(!is.null(children$Title)){ | ||
| covTitle <- xmlValue(children$Title) | ||
| } | ||
| covAbstract <- NULL | ||
| if(!is.null(children$Abstract)){ | ||
| covAbstract <- xmlValue(children$Abstract) | ||
| } | ||
| covRef <- NULL | ||
| if(!is.null(children$Reference)){ | ||
| covRef <- xmlGetAttr(children$Reference, "xlink:href") | ||
| } | ||
|
|
||
| coverage <- list( | ||
| identifier = covIdentifier, | ||
| title = covTitle, | ||
| abstract = covAbstract, | ||
| reference = covRef | ||
| ) | ||
|
|
||
| return(coverage) | ||
|
|
||
| } | ||
|
|
||
| ), | ||
| public = list( | ||
| #'@field description description | ||
| description = NULL, | ||
|
|
||
| #'@description Initializes an object of class \link{WCSCoverage} | ||
| #'@param xmlObj object of class \link{XMLInternalNode-class} | ||
| #'@param serviceVersion WCS service version | ||
| #'@param owsVersion OWS version | ||
| #'@param logger logger | ||
| initialize = function(xmlObj, serviceVersion, owsVersion, logger = NULL){ | ||
| super$initialize(logger = logger) | ||
|
|
||
| coverage = private$fetchCoverage(xmlObj, serviceVersion, owsVersion) | ||
| private$identifier = coverage$identifier | ||
| private$title = coverage$title | ||
| private$abstract = coverage$abstract | ||
| private$reference = coverage$reference | ||
| }, | ||
|
|
||
| #'@description Get identifier | ||
| #'@return an object of class \code{character} | ||
| getIdentifier = function(){ | ||
| return(private$identifier) | ||
| }, | ||
|
|
||
| #'@description Get title | ||
| #'@return an object of class \code{character} | ||
| getTitle = function(){ | ||
| return(private$title) | ||
| }, | ||
|
|
||
| #'@description Get abstract | ||
| #'@return an object of class \code{character} | ||
| getAbstract = function(){ | ||
| return(private$abstract) | ||
| }, | ||
|
|
||
| #'@description Get reference | ||
| #'@return an object of class \code{character} | ||
| getReference = function(){ | ||
| return(private$reference) | ||
| }, | ||
|
|
||
| #'@description Get data | ||
| #'@return an object of class \code{RasterLayer} | ||
| getData = function(){ | ||
| tmp <- tempfile() | ||
| req <- httr::GET(private$reference) | ||
| bin <- content(req, "raw") | ||
| writeBin(bin, tmp) | ||
| r <- raster::raster(tmp) | ||
| return(r) | ||
| } | ||
| ) | ||
| ) |
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