XML parsing using Scala - scala

Question

I have the following XML file which I want to parse using Scala:
<infoFile xmlns="http://latest/nmc-omc/cmNrm.doc#info" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://latest/nmc-omc/cmNrm.doc#info schema\pmResultSchedule.xsd">
<fileHeader fileFormatVersion="123456" operator="ABCD">
<fileSender elementType="MSC UTLI"/>
<infoCollec beginTime="2011-05-15T00:00:00-05:00"/>
</fileHeader>
<infoCollecData>
<infoMes infoMesID="551727">
<mesPeriod duration="TT1234" endTime="2011-05-15T00:30:00-05:00"/>
<mesrePeriod duration="TT1235"/>
<mesTypes>5517271 5517272 5517273 5517274 </measTypes>
<mesValue mesObj="RPC12/LMI_ANY:Label=BCR-1232_1111, ANY=1111">
<mesResults>149 149 3 3 </mesResults>
</mesValue>
</infoMes>
<infoMes infoMesID="551728">
<mesTypes>6132413 6132414 6132415</mesTypes>
<mesValue measObjLdn="RPC12/LMI_ANY:Label=BCR-1232_64446, CllID=64446">
<mesResults>0 0 6</mesResults>
</mesValue>
<mesValue measObjLdn="RPC13/LMI_ANY:Label=BCR-1232_64447, CllID=64447">
<mesResults>0 1 6</mesResults>
</mesValue>
</infoMes>
<infoMes infoMesID="551729">
<mesTypes>6132416 6132417 6132418 6132419</mesTypes>
<mesValue measObjLdn="RPC12/LMI_ANY:Label=BCR-1232_64448, CllID=64448">
<mesResults>1 4 6 8</mesResults>
</mesValue>
<mesValue measObjLdn="RPC13/LMI_ANY:Label=BCR-1232_64449, CllID=64449">
<mesResults>1 2 4 5 </mesResults>
</mesValue>
<mesValue measObjLdn="RPC13/LMI_ANY:Label=BCR-1232_64450, CllID=64450">
<mesResults>1 7 8 5 </mesResults>
</mesValue>
</infoMes>
</infoCollecData>
I want the file to be parsed as follows:
From the fileHeader I want to be able to extract operator name then to extract beginTime.
Next scenario ****extract the information which contains CllID then get its mesTypes and mesResults respectively ****
as the file contains number of with different CllID so I want the final result like this
CllID date time mesTypes mesResults
64446 2011-05-15 00:00:00 6132413 0
64446 2011-05-15 00:00:00 6132414 0
64446 2011-05-15 00:00:00 6132415 6
64447 2011-05-15 00:00:00 6132413 0
64447 2011-05-15 00:00:00 6132414 1
64447 2011-05-15 00:00:00 6132415 6
How could I achieve this ? Here is what I have tried so far:
import java.io._
import scala.xml.Node
object xml_parser {
def main (args:Array[String]) = {
val input_xmlFile = scala.xml.XML.loadFile("C:/Users/ss.xml")
val fileHeader = input_xmlFile \ "fileHeader"
val vendorName = input_xmlFile \ "fileHeader" \ "#operator"
val dateTime = input_xmlFile \ "fileHeader" \ "infoCollec" \"#beginTime"
val date = dateTime.text.split("T")(0)
val time = dateTime.text.split("T")(1).split("-")(0)
val CcIds = (input_xmlFile \ "infoCollecData" \ "infoMes" \\ "mesTypes" )
val cids = CcIds.text.split("\\s+").toList
al CounterValues = (input_xmlFile \ "infoCollecData" \\ "infoMes" \\ "mesValue" \\ "#meaObj")
println(date);println(time);print(cids)

Answer 1

May I suggest kantan.xpath? It seems like it should sort your problem rather easily.
Assuming your XML data is available in file data, you can write:
import kantan.xpath.implicits._
val xml = data.asUnsafeNode
// Date format to parse dates. Put in the right format.
// Note that this uses java.util.Date, you could also use the joda time module.
implicit val format = ???
// Extract the header data
xml.evalXPath[java.util.Date](xp"//fileheader/infocollec/#begintime")
xml.evalXPath[String](xp"//fileheader/#operator")
// Get the required infoMes nodes as a list, turn each one into whatever data type you need.
xml.evalXPath[List[Node]](xp"//infomes/mesvalue[contains(#measobjldn, 'CllID')]/..").map { node =>
...
}
Extracting the CllID bit is not terribly complicated with the right regular expression, you could either use the standard Scala Regex class or kantan.regex for something a bit more type safe but that might be overkill here.

Answer 2

The following code can implement what you want according to your xml format
def main(args: Array[String]): Unit = {
val inputFile = xml.XML.loadFile("C:/Users/ss.xml")
val fileHeader = inputFile \ "fileHeader"
val beginTime = fileHeader \"infoCollec"
val res = beginTime.map(_.attribute("beginTime")).apply(0).get.text
val dateTime = res.split("T")
val date = dateTime(0)
val time = dateTime(1).split("-").apply(0)
val title = ("CllID", "date", "time", "mesTypes", "mesResults")
println(s"${title._1}\t${title._2}\t\t${title._3}\t\t${title._4}\t${title._5}")
val infoMesNodeList = (inputFile \\ "infoMes").filter{node => (node \ "mesValue").exists(_.attribute("measObjLdn").nonEmpty)}
infoMesNodeList.foreach{ node =>
val mesTypesList = (node \ "mesTypes").text.split(" ").map(_.toInt)
(node \ "mesValue").foreach { node =>
val mesResultsList = (node \ "mesResults").text.split(" ").map(_.toInt)
val CllID = node.attribute("measObjLdn").get.text.split(",").apply(1).split("=").apply(1).toInt
val res = (mesTypesList zip mesResultsList).map(item => (CllID, date, time, item._1, item._2))
res.foreach(item => println(s"${item._1}\t${item._2}\t${item._3}\t${item._4}\t\t${item._5}"))
}
}
}
Notes: your xml file does not have the right format
1) miss close tag in the last line of the file
2) line 11, have a wrong tag , which should be