org.apache.commons.io.input

Class ClosedReader

java.lang.Object

java.io.Reader

org.apache.commons.io.input.ClosedReader

All Implemented Interfaces:

Closeable, AutoCloseable, Readable

public class ClosedReader
extends Reader

Always returns IOUtils.EOF to all attempts to read something from it.

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

Field Summary

Fields

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

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor and Description
ClosedReader() Construct a new instance.

Method Summary

Modifier and Type	Method and Description
void	close()
int	read(char[] cbuf, int off, int len) Returns -1 to indicate that the stream is closed.

Methods inherited from class java.io.Reader

mark, markSupported, read, read, read, ready, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ClosedReader INSTANCE

The singleton instance.

Constructor Detail

ClosedReader

public ClosedReader()

Construct a new instance.

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class Reader

Throws:

IOException

read

public int read(char[] cbuf,
                int off,
                int len)

Returns -1 to indicate that the stream is closed.

Specified by:

read in class Reader

Parameters:

cbuf - ignored

off - ignored

len - ignored

Returns:

always -1