XMLReader

package il.ac.hit

import java.io._
import java.net.URL
import java.text.SimpleDateFormat
import java.util.StringTokenizer
import scala.io.Source
import scala.xml.XML
import java.util.Date


// the Model
object XMLreader extends XMLReaderInterface{


  def connectToUrl (): Int = {

    val url = new URL("http://www.abelski.com/currencies.xml")
    //val url = new URL("http://www.boi.org.il/currency.xml")
    val connection = url.openConnection()
    val document = XML.load(connection.getInputStream)
    var countCurrencies : Int = 0
    val writer = new PrintWriter(new File("CurrenicesData.txt"))

      try{

        writer.write( ((document\\"CURRENCIES")\\"LAST_UPDATE").text )
        writer.write(System.lineSeparator())

        for ( currentData <- (document\\"CURRENCY") ){
          countCurrencies = countCurrencies + 1
          writer.write( (currentData\\"CURRENCYCODE").text + " " +  (currentData\\"RATE").text )
          writer.write(System.lineSeparator())
        }

      }
      finally writer.close()
      countCurrencies
  }


  def updateData(currenciesNamesArray: Array[String], currenciesRatesArray: Array[Double]): java.util.Date ={

    connectToUrl()

    var ob = Source.fromFile("CurrenicesData.txt");
    var i_local = 0


      for( line <- ob.getLines.drop(1) )   // to not contain the first line of the file
      {
          var st = new StringTokenizer(line," ", false)
          var currencyName = st.nextToken()
          var currencyRate = st.nextToken().toDouble

            currenciesNamesArray(i_local) = currencyName
            currenciesRatesArray(i_local) = currencyRate
            i_local = i_local + 1
      }


      ob = Source.fromFile("CurrenicesData.txt");
      val iterator = ob.getLines()
      val stringDate = iterator.next()
      val  simpleDateFormat:SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
      val date = simpleDateFormat.parse(stringDate);

      date
  } // end of method

}// end of class