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#' @name SDMXStructureType
#' @rdname SDMXStructureType
#' @aliases SDMXStructureType,SDMXStructureType-method
#'
#' @usage
#' SDMXStructureType(xmlObj, namespaces, resource)
#'
#' @param xmlObj object of class "XMLInternalDocument derived from XML package
#' @param namespaces object of class "data.frame" given the list of namespace URIs
#' @param resource object of class "character" giving the REST resource to be
#' queried (required to distinguish between dataflows and datastructures in
#' SDMX 2.0)
#' @return an object of class "SDMXStructureType"
#'
#' @seealso \link{readSDMX}
#'
SDMXStructureType <- function(xmlObj, namespaces, resource){
new("SDMXStructureType",
SDMXType(xmlObj),
subtype = type.SDMXStructureType(xmlObj, namespaces, resource));
}
type.SDMXStructureType <- function(xmlObj, namespaces, resource){
sdmxVersion <- version.SDMXSchema(xmlObj, namespaces)
VERSION.21 <- sdmxVersion == "2.1"
messageNsString <- "message"
if(isRegistryInterfaceEnvelope(xmlObj, FALSE)) messageNsString <- "registry"
messageNs <- findNamespace(namespaces, messageNsString)
strNs <- findNamespace(namespaces, "structure")
if(VERSION.21){
dsXML <- getNodeSet(xmlObj, "//ns:DataStructures", namespaces = strNs)
ccXML <- getNodeSet(xmlObj, "//ns:Concepts", namespaces = strNs)
clXML <- getNodeSet(xmlObj, "//ns:Codelists", namespaces = strNs)
if(all(c(length(dsXML)>0,length(ccXML)>0,length(clXML)>0))){
return("DataStructureDefinitionsType")
}else{
#others
structuresXML <- getNodeSet(xmlObj, "//ns:Structures", namespaces = messageNs)
strType <- paste(xmlName(xmlChildren(structuresXML[[1]])[[1]]), "Type", sep="")
return(strType)
}
}else{
#TODO flowXML
flowXML <- getNodeSet(xmlObj, "//ns:Dataflows", namespaces = messageNs)
dsXML <- getNodeSet(xmlObj, "//ns:KeyFamilies", namespaces = messageNs)
ccXML <- getNodeSet(xmlObj, "//ns:Concepts", namespaces = messageNs)
clXML <- getNodeSet(xmlObj, "//ns:CodeLists", namespaces = messageNs)
if(all(c(length(dsXML)>0, length(ccXML)>0, length(clXML)>0))){
#DSD
return("DataStructureDefinitionsType")
}else{
#others
if(length(ccXML)>0) return("ConceptsType")
if(length(clXML)>0) return("CodelistsType")
if(length(flowXML)>0) return("DataflowsType")
if(length(dsXML)>0){
if(is.null(resource)){
strType <- "DataStructuresType"
}else{
strType <- switch(resource,
"dataflow" = "DataflowsType",
"datastructure" = "DataStructuresType")
}
return(strType)
}
}
}
return(NULL)
}
#generics
if (!isGeneric("getStructureType"))
setGeneric("getStructureType", function(obj) standardGeneric("getStructureType"));
#methods
setMethod(f = "getStructureType", signature = "SDMXStructureType", function(obj){
return(obj@subtype)
})
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