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com.tangosol.io.nio
Class ByteBufferOutputStream

java.lang.Object
java.io.OutputStream
com.tangosol.io.nio.ByteBufferOutputStream

All Implemented Interfaces:

OutputStreaming, Closeable, Flushable

public class ByteBufferOutputStream

extends OutputStream

implements OutputStreaming

An OutputStream implementation on top of a Java NIO ByteBuffer.

Since:

Coherence 2.2

Author:

cp 2002.09.06

Constructor Summary

ByteBufferOutputStream(ByteBuffer buffer)
Construct a ByteBufferOutputStream on a ByteBuffer object.

Method Summary

void	close() Close the stream, flushing any accumulated bytes.
void	flush() Flush any accumulated bytes.
ByteBuffer	getByteBuffer() Obtain the ByteBuffer that this OutputStream is based on.
protected static String	includeMessage(Throwable e) Provide a "suffix" containing the exception message (if any).
protected NullPointerException	potentialStreamClosedException(NullPointerException e) Check if an NPE is caused by the stream being closed.
void	write(byte[] abSrc, int ofSrc, int cbSrc) Writes len bytes from the specified byte array starting at offset off to this output stream.
void	write(int b) Writes the specified byte to this output stream.

Methods inherited from class java.io.OutputStream

write

Methods inherited from interface com.tangosol.io.OutputStreaming

write

Constructor Detail

ByteBufferOutputStream

public ByteBufferOutputStream(ByteBuffer buffer)

Construct a ByteBufferOutputStream on a ByteBuffer object.

Parameters:

buffer - the ByteBuffer to write the data to

Method Detail

getByteBuffer

public ByteBuffer getByteBuffer()

Obtain the ByteBuffer that this OutputStream is based on.

Returns:

the underlying ByteBuffer

write

public void write(int b)
           throws IOException

Writes the specified byte to this output stream.

Specified by:

write in interface OutputStreaming

Specified by:

write in class OutputStream

Parameters:

b - the byte

Throws:

IOException - if an I/O error occurs

write

public void write(byte[] abSrc,
                  int ofSrc,
                  int cbSrc)
           throws IOException

Writes len bytes from the specified byte array starting at offset off to this output stream.

If b is null, a NullPointerException is thrown.

If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown.

Specified by:

write in interface OutputStreaming

Overrides:

write in class OutputStream

Parameters:

abSrc - the data

ofSrc - the start offset in the data

cbSrc - the number of bytes to write

Throws:

IOException - if an I/O error occurs

flush

public void flush()
           throws IOException

Flush any accumulated bytes.

Specified by:

flush in interface OutputStreaming

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException - if an I/O error occurs

close

public void close()
           throws IOException

Close the stream, flushing any accumulated bytes. The underlying buffer is not closed.

Specified by:

close in interface OutputStreaming

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

Throws:

IOException - if an I/O error occurs

includeMessage

protected static String includeMessage(Throwable e)

Provide a "suffix" containing the exception message (if any).

Parameters:

e - an exception (any Throwable object)

Returns:

either an empty string (no message) or a suitable suffix for an error message

potentialStreamClosedException

protected NullPointerException potentialStreamClosedException(NullPointerException e)
                                                       throws IOException

Check if an NPE is caused by the stream being closed. Either throws an IO exception if the stream is closed or throws the original NPE.

Parameters:

e - an NPE

Returns:

this method never returns normally but is designed so that the developer can write "throw potentialStreamClosedException(e)" so that the compiler knows that an exception is thrown at that point in the code

Throws:

IOException - if the stream is closed

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