org.apache.commons.io.output

Class ClosedOutputStream

java.lang.Object

java.io.OutputStream

org.apache.commons.io.output.ClosedOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class ClosedOutputStream
extends OutputStream

Throws an IOException on all attempts to write to the stream.

Typically uses of this class include testing for corner cases in methods that accept an output stream and acting as a sentinel value instead of a null output stream.

Field Summary

Fields

Modifier and Type	Field and Description
static ClosedOutputStream	INSTANCE The singleton instance.

Constructor Summary

Constructors

Constructor and Description
ClosedOutputStream() Construct a new instance.

Method Summary

Modifier and Type	Method and Description
void	flush() Throws an IOException to indicate that the stream is closed.
void	write(byte[] b, int off, int len) Throws an IOException to indicate that the stream is closed.
void	write(int b) Throws an IOException to indicate that the stream is closed.

Methods inherited from class java.io.OutputStream

close, write

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ClosedOutputStream INSTANCE

The singleton instance.

Constructor Detail

ClosedOutputStream

public ClosedOutputStream()

Construct a new instance.

Method Detail

flush

public void flush()
           throws IOException

Throws an IOException to indicate that the stream is closed.

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException - always thrown

write

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

Throws an IOException to indicate that the stream is closed.

Overrides:

write in class OutputStream

Parameters:

b - ignored

off - ignored

len - ignored

Throws:

IOException - always thrown

write

public void write(int b)
           throws IOException

Throws an IOException to indicate that the stream is closed.

Specified by:

write in class OutputStream

Parameters:

b - ignored

Throws:

IOException - always thrown