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#' @name SDMXHeader
#' @rdname SDMXHeader
#' @aliases SDMXHeader,SDMXHeader-method
#'
#' @usage
#' SDMXHeader(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 "SDMXHeader"
#'
#' @seealso \link{readSDMX}
#' @export
#'
SDMXHeader <- function(xmlObj, namespaces){
sdmxVersion <- version.SDMXSchema(xmlObj, namespaces)
VERSION.10 <- sdmxVersion == "1.0"
VERSION.20 <- sdmxVersion == "2.0"
VERSION.21 <- sdmxVersion == "2.1"
#header elements
node <- xmlRoot(xmlObj)[[1]];
children <- xmlChildren(node)
#header attributes
#-----------------
id <- xmlValue(children$ID);
test <- FALSE
if(!is.null(children$Test))
test <- as.logical(xmlValue(children$Test));
truncated <- FALSE
if(!is.null(children$Truncated))
truncated <- as.logical(xmlValue(children$Truncated));
name <- xmlValue(children$Name);
#sender
sender <- list(id=NA,name=NA,contact=NULL)
if(!is.null(children$Sender)){
sender$id <- xmlGetAttr(children$Sender,"id");
senderList <- xmlChildren(children$Sender)
if(length(senderList) != 0){
#name
sender$name <- new.env()
senderNames <- senderList[names(senderList) == "Name"]
sapply(senderNames,
function(x) {
if(xmlName(x) == "Name"){
lang <- xmlGetAttr(x,"xml:lang")
if(is.null(lang)) lang <- xmlGetAttr(x,"lang")
if(is.null(lang)) lang <- "default"
sender$name[[lang]] <- xmlValue(x)
}
})
sender$name <- as.list(sender$name)
#contact
sender$contact <- NULL #TODO currently not implemented
#timezone
if(VERSION.21){
sender$timezone <- xmlValue(senderNames[["Timezone"]])
}
}
}
#receiver
receiver <- list(id=NA,name=NA,contact=NULL)
if(!is.null(children$Receiver)){
receiver$id <- xmlGetAttr(children$Receiver,"id");
receiverList <- xmlChildren(children$Receiver)
if(length(receiverList) != 0){
#name
receiver$name <- new.env()
receiverNames <- receiverList[names(receiverList) == "Name"]
sapply(receiverNames, function(x) {
if(xmlName(x) == "Name"){
lang <- xmlGetAttr(x,"xml:lang")
if(is.null(lang)) lang <- xmlGetAttr(x,"lang")
if(is.null(lang)) lang <- "default"
receiver$name[[lang]] <- xmlValue(x)
}
})
receiver$name <- as.list(receiver$name)
#contact
sender$contact <- NULL #TODO currently not implemented
#timezone
if(VERSION.21){
sender$timezone <- xmlValue(senderNames[["Timezone"]])
}
}
}
#source
source <- xmlValue(children$Source);
#Dates
preparedFormat <- NULL;
prepared <- xmlValue(children$Prepared);
if(!is.na(prepared)){
if(nchar(prepared,"w") %in% c(4,10)){
if(nchar(prepared,"w") == 4)
prepared <- ISOdate(as.integer(prepared),1,1)
preparedFormat <- "%Y-%m-%d";
}else{
if(attr(regexpr("T", prepared),"match.length") != -1){
preparedFormat <- "%Y-%m-%dT%H:%M:%S";
}else{
preparedFormat <- "%Y-%m-%d %H:%M:%S";
}
}
prepared <- as.POSIXlt(strptime(prepared, format = preparedFormat));
}else{
prepared <- as.POSIXlt(NA)
}
extractedFormat <- NULL;
extracted <- xmlValue(children$Extracted);
if(!is.na(extracted)){
if(nchar(extracted,"w") %in% c(4,10)){
if(nchar(extracted,"w") == 4)
extracted <- ISOdate(as.integer(extracted),1,1)
extractedFormat <- "%Y-%m-%d";
}else{
if(attr(regexpr("T", extracted),"match.length") != -1){
extractedFormat <- "%Y-%m-%dT%H:%M:%S";
}else{
extractedFormat <- "%Y-%m-%d %H:%M:%S";
}
}
extracted <- as.POSIXlt(strptime(extracted, format = extractedFormat));
}else{
extracted <- as.POSIXlt(NA)
}
#Reporting Dates
reportFormat <- NULL;
reportBegin = xmlValue(children$ReportingBegin)
if(!is.na(reportBegin)){
if(nchar(reportBegin,"w") %in% c(4,10)){
if(nchar(reportBegin,"w") == 4)
reportBegin <- ISOdate(as.integer(reportBegin),1,1)
reportFormat <- "%Y-%m-%d";
}else{
if(attr(regexpr("T", reportBegin),"match.length") != -1){
reportFormat <- "%Y-%m-%dT%H:%M:%S";
}else{
reportFormat <- "%Y-%m-%d %H:%M:%S";
}
}
reportBegin <- as.POSIXlt(strptime( reportBegin, format = reportFormat));
}else{
reportBegin <- as.POSIXlt(NA)
}
reportEnd = xmlValue(children$ReportingEnd)
if(!is.na(reportEnd)){
if(nchar(reportEnd,"w") == 4){
reportEnd <- ISOdate(as.integer(reportEnd),12,31)
}
reportEnd <- as.POSIXlt(strptime( reportEnd, format = reportFormat));
}else{
reportEnd <- as.POSIXlt(NA)
}
#SDMXHeader object
obj <- new("SDMXHeader",
ID = id, Test = test, Truncated = truncated,
Name = name, Sender = sender, Receiver = receiver,
Prepared = prepared, Extracted = extracted,
ReportingBegin = reportBegin, ReportingEnd = reportEnd,
Source = source);
return(obj);
}
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