Package org.apache.tools.ant.util

Class KeepAliveOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

org.apache.tools.ant.util.KeepAliveOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class KeepAliveOutputStream
extends FilterOutputStream

Class that can be used to wrap System.out and System.err without getting anxious about any client closing the stream.

In code-language it means that it is not necessary to do:

 if (out != System.out && out != System.err) {
   out.close();
 }
 

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor	Description
KeepAliveOutputStream(OutputStream out)	Constructor of KeepAliveOutputStream.

Method Summary

Modifier and Type	Method	Description
void	close()	This method does nothing.
static PrintStream	wrapSystemErr()	Convenience factory method that returns a non-closing PrintStream around System.err.
static PrintStream	wrapSystemOut()	Convenience factory method that returns a non-closing PrintStream around System.out.

Methods inherited from class java.io.FilterOutputStream

flush, write, write, write

Methods inherited from class java.io.OutputStream

nullOutputStream

Methods inherited from class java.lang.Object

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

Constructor Details

KeepAliveOutputStream

public KeepAliveOutputStream(OutputStream out)

Constructor of KeepAliveOutputStream.

Parameters:

out - an OutputStream value, it should be standard output.

Method Details

close

public void close()
           throws IOException

This method does nothing.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class FilterOutputStream

Throws:

IOException - as we are overriding FilterOutputStream.

wrapSystemOut

public static PrintStream wrapSystemOut()

Convenience factory method that returns a non-closing PrintStream around System.out.

Returns:

PrintStream

Since:

Ant 1.8.0

wrapSystemErr

public static PrintStream wrapSystemErr()

Convenience factory method that returns a non-closing PrintStream around System.err.

Returns:

PrintStream

Since:

Ant 1.8.0