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#' @name SDMXConcept
#' @rdname SDMXConcept
#' @aliases SDMXConcept,SDMXConcept-method
#'
#' @usage
#' SDMXConcept(xmlObj, namespaces)
#'
#' @param xmlObj object of class "XMLInternalDocument derived from XML package
#' @param namespaces object of class "data.frame" given the list of namespace URIs
#' @return an object of class "SDMXConcept"
#'
#' @seealso \link{readSDMX}
#' @export
#'
SDMXConcept <- function(xmlObj, namespaces){
messageNs <- findNamespace(namespaces, "message")
strNs <- findNamespace(namespaces, "structure")
sdmxVersion <- version.SDMXSchema(xmlDoc(xmlObj), namespaces)
VERSION.21 <- sdmxVersion == "2.1"
refNs <- strNs
if(VERSION.21){
comNs <- findNamespace(namespaces, "common")
refNs <- comNs
}
#attributes
#=========
id = xmlGetAttr(xmlObj, "id")
if(is.null(id)) id <- as.character(NA)
agencyId = xmlGetAttr(xmlObj, "agencyID")
if(is.null(agencyId)) agencyId <- as.character(NA)
version = xmlGetAttr(xmlObj, "version")
if(is.null(version)) version <- as.character(NA)
uri = xmlGetAttr(xmlObj, "uri")
if(is.null(uri)) uri <- as.character(NA)
urn = xmlGetAttr(xmlObj, "urn")
if(is.null(urn)) urn <- as.character(NA)
isExternalReference = xmlGetAttr(xmlObj, "isExternalReference")
if(is.null(isExternalReference)){
isExternalReference <- NA
}else{
isExternalReference <- as.logical(isExternalReference)
}
coreRepresentation = xmlGetAttr(xmlObj, "coreRepresentation")
#manage SDMX 2.1 conceptIdentity and codelist LocalRepresentation
if(VERSION.21){
conceptRefXML <- NULL
conceptIdentityXML <- getNodeSet(xmlDoc(xmlObj),
"//str:ConceptIdentity",
namespaces = c(str = as.character(strNs)))
if(length(conceptIdentityXML) > 0)
conceptRefXML <- xmlChildren(conceptIdentityXML[[1]])[[1]]
codelistRefXML <- NULL
enumXML <- getNodeSet(xmlDoc(xmlObj),
"//str:Enumeration",
namespaces = c(str = as.character(strNs)))
if(length(enumXML) > 0)
codelistRefXML <- xmlChildren(enumXML[[1]])[[1]]
#concepts
if(!is.null(conceptRefXML)){
coreRepresentation <- xmlGetAttr(conceptRefXML, "id")
}
#codelists
if(!is.null(codelistRefXML)){
coreRepresentation <- xmlGetAttr(codelistRefXML, "id")
}
}
if(is.null(coreRepresentation)) coreRepresentation <- as.character(NA)
coreRepresentationAgency = xmlGetAttr(xmlObj, "coreRepresentationAgency")
if(is.null(coreRepresentationAgency)) coreRepresentationAgency <- as.character(NA)
parent = xmlGetAttr(xmlObj, "parent")
if(is.null(parent)) parent <- as.character(NA)
parentAgency = xmlGetAttr(xmlObj, "parentAgency")
if(is.null(parentAgency)) parentAgency <- as.character(NA)
#elements
#========
#name (multi-languages)
conceptNamesXML <- getNodeSet(xmlDoc(xmlObj), "//ns:Name", namespaces = refNs)
conceptNames <- NULL
if(length(conceptNamesXML) > 0){
conceptNames <- new.env()
sapply(conceptNamesXML,
function(x){
lang <- xmlGetAttr(x,"xml:lang")
if(is.null(lang)) lang <- xmlGetAttr(x,"lang")
if(is.null(lang)) lang <- "default"
conceptNames[[lang]] <- xmlValue(x)
})
conceptNames <- as.list(conceptNames)
}
#description (multi-languages)
conceptDesXML <- getNodeSet(xmlDoc(xmlObj), "//ns:Description", namespaces = refNs)
conceptDescriptions <- list()
if(length(conceptDesXML) > 0){
conceptDescriptions <- new.env()
sapply(conceptDesXML,
function(x){
lang <- xmlGetAttr(x,"xml:lang")
if(is.null(lang)) lang <- xmlGetAttr(x,"lang")
if(is.null(lang)) lang <- "default"
conceptDescriptions[[lang]] <- xmlValue(x)
})
conceptDescriptions <- as.list(conceptDescriptions)
}
#instantiate the object
obj<- new("SDMXConcept",
#attributes
id = id,
agencyID = agencyId,
version = version,
uri = uri,
urn = urn,
isExternalReference = isExternalReference,
coreRepresentation = coreRepresentation,
coreRepresentationAgency = coreRepresentationAgency,
parent = parent,
parentAgency = parentAgency,
#elements
Name = conceptNames,
Description = conceptDescriptions
)
}
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