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:
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(); }
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Field Summary
Fields inherited from class java.io.FilterOutputStream
out
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Constructor Summary
Constructors Constructor Description KeepAliveOutputStream(java.io.OutputStream out)
Constructor of KeepAliveOutputStream. -
Method Summary
Modifier and Type Method 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.io.OutputStream
nullOutputStream
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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KeepAliveOutputStream
public KeepAliveOutputStream(java.io.OutputStream out)Constructor of KeepAliveOutputStream.- Parameters:
out
- an OutputStream value, it should be standard output.
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Method Details
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close
public void close() throws java.io.IOExceptionThis method does nothing.- Specified by:
close
in interfacejava.lang.AutoCloseable
- Specified by:
close
in interfacejava.io.Closeable
- Overrides:
close
in classjava.io.FilterOutputStream
- Throws:
java.io.IOException
- as we are overriding FilterOutputStream.
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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
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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
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