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:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class KeepAliveOutputStream
extends java.io.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 and Description
KeepAliveOutputStream(java.io.OutputStream out) Constructor of KeepAliveOutputStream.

Method Summary

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

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

Constructor Detail

KeepAliveOutputStream

public KeepAliveOutputStream(java.io.OutputStream out)

Constructor of KeepAliveOutputStream.

Parameters:

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

Method Detail

close

public void close()
           throws java.io.IOException

This method does nothing.

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.FilterOutputStream

Throws:

java.io.IOException - as we are overriding FilterOutputStream.

wrapSystemOut

public static java.io.PrintStream wrapSystemOut()

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

Returns:

PrintStream

Since:

Ant 1.8.0

wrapSystemErr

public static java.io.PrintStream wrapSystemErr()

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

Returns:

PrintStream

Since:

Ant 1.8.0