org.rosuda.JRI

Class RConsoleOutputStream

java.lang.Object

java.io.OutputStream

org.rosuda.JRI.RConsoleOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class RConsoleOutputStream
extends OutputStream

RConsoleOutputStream provides an OutputStream which causes its output to be written to the R console. It is a pseudo-stream as there is no real descriptor connected to the R console and thusly it is legal to have multiple console streams open. The synchonization happens at the RNI level.

Note that stdout/stderr are not connected to the R console by default, so one way of using this stream is to re-route Java output to R console:

System.setOut(new PrintStream(new RConsoleOutputStream(engine, 0)));
System.setErr(new PrintStream(new RConsoleOutputStream(engine, 1)));

Since:

JRI 0.4-0

Constructor Summary

Constructors

Constructor and Description
RConsoleOutputStream(Rengine eng, int oType) opens a new output stream to R console

Method Summary

Modifier and Type	Method and Description
void	close()
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)

Methods inherited from class java.io.OutputStream

flush

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RConsoleOutputStream

public RConsoleOutputStream(Rengine eng,
                            int oType)

opens a new output stream to R console

Parameters:

eng - R engine

oType - output type (0=regular, 1=error/warning)

Method Detail

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] b)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

write

public void write(int b)
           throws IOException

Specified by:

write in class OutputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class OutputStream

Throws:

IOException