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/* NEST (New Scala Test)
* Copyright 2007-2010 LAMP/EPFL
* @author Philipp Haller
*/
// $Id$
package scala.tools.partest
package nest
import java.io._
object StreamAppender {
def wrapIn(in: InputStream): BufferedReader = new BufferedReader(new InputStreamReader(in))
def wrapIn(reader: Reader): BufferedReader = new BufferedReader(reader)
def wrapIn(str: String): BufferedReader = new BufferedReader(new StringReader(str))
def wrapOut(out: OutputStream): PrintWriter = new PrintWriter(new OutputStreamWriter(out), true)
def wrapOut(writer: Writer): PrintWriter = new PrintWriter(writer, true)
def wrapOut(): PrintWriter = wrapOut(new StringWriter)
def apply(reader: BufferedReader, writer: Writer): StreamAppender =
new StreamAppender(reader, wrapOut(writer))
def apply(reader: Reader, writer: Writer): StreamAppender =
apply(wrapIn(reader), writer)
def apply(in: InputStream, writer: Writer): StreamAppender =
apply(wrapIn(in), writer)
def apply(str: String, writer: Writer): StreamAppender =
apply(wrapIn(str), writer)
def apply(in: File, out: File): StreamAppender =
apply(new FileReader(in), new FileWriter(out))
def appendToString(in1: InputStream, in2: InputStream): String = {
val swriter1 = new StringWriter
val swriter2 = new StringWriter
val app1 = StreamAppender(wrapIn(in1), swriter1)
val app2 = StreamAppender(wrapIn(in2), swriter2)
val async = new Thread(app2)
async.start()
app1.run()
async.join()
swriter1.toString + swriter2.toString
}
/*
private def inParallel(t1: Runnable, t2: Runnable, t3: Runnable) {
val thr1 = new Thread(t1)
val thr2 = new Thread(t2)
thr1.start()
thr2.start()
t3.run()
thr1.join()
thr2.join()
}
*/
private def inParallel(t1: Runnable, t2: Runnable) {
val thr = new Thread(t2)
thr.start()
t1.run()
thr.join()
}
def concat(in: InputStream, err: InputStream, out: OutputStream) = new Runnable {
override def run() {
val outWriter = wrapOut(out)
val inApp = StreamAppender(in, outWriter)
val errStringWriter = new StringWriter
val errApp = StreamAppender(wrapIn(err), errStringWriter)
inParallel(inApp, errApp)
// append error string to out
StreamAppender(errStringWriter.toString, outWriter).run()
}
}
}
class StreamAppender(reader: BufferedReader, writer: PrintWriter) extends Runnable {
override def run() = runAndMap(identity)
private def lines() = Iterator continually reader.readLine() takeWhile (_ != null)
def closeAll() = {
reader.close()
writer.close()
}
def runAndMap(f: String => String) =
try lines() map f foreach (writer println _)
catch { case e: IOException => e.printStackTrace() }
}
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