handler for URL:sum://

SumURLHandler.scala

/**
    Copyright: (c) SAEKI Yoshiyasu
    License  : MIT-style license
               <http://www.opensource.org/licenses/mit-license.php>
    last updated: 2012/03/31
**/

import java.net.{URL, URLConnection, URLStreamHandler, URLStreamHandlerFactory}
import java.io.{InputStream, InputStreamReader, ByteArrayInputStream}


class SumConnection(url:URL) extends URLConnection(url:URL) {

  override def connect = {}

  override def getInputStream:ByteArrayInputStream = {
    val value:Int = getURL.getHost.split(",").map(_.toInt).sum
    new ByteArrayInputStream(value.toString.getBytes)
  }

  override def getContentType:String = "text/plain"
}

class SumStreamHandler extends URLStreamHandler {

  override def openConnection(url:URL):URLConnection = new SumConnection(url)

}

class SumStreamHandlerFactory extends URLStreamHandlerFactory {

  override def createURLStreamHandler(protocol:String) = {
    protocol match {
      case "sum" => new SumStreamHandler()
      case _ => null
    }
  }

}

URL.setURLStreamHandlerFactory(new SumStreamHandlerFactory())