question: public static < T > T withObjectStreams ( Socket socket , @ ClosureParams ( value = SimpleType . class , options = { "java.io.ObjectInputStream" , "java.io.ObjectOutputStream" } ) Closure < T > closure ) throws IOException { InputStream input = socket . getInputStream ( ) ; OutputStream output = socket . getOutputStream ( ) ; ObjectOutputStream oos = new ObjectOutputStream ( output ) ; ObjectInputStream ois = new ObjectInputStream ( input ) ; try { T result = closure . call ( new Object [ ] { ois , oos } ) ; InputStream temp1 = ois ; ois = null ; temp1 . close ( ) ; temp1 = input ; input = null ; temp1 . close ( ) ; OutputStream temp2 = oos ; oos = null ; temp2 . close ( ) ; temp2 = output ; output = null ; temp2 . close ( ) ; return result ; } finally { closeWithWarning ( ois ) ; closeWithWarning ( input ) ; closeWithWarning ( oos ) ; closeWithWarning ( output ) ; } }
target:  Creates an InputObjectStream and an OutputObjectStream from a Socket, and passes them to the closure.  The streams will be closed after the closure returns, even if an exception is thrown.