org.ka2ddo.yaac.io

Class NonshareableByteArrayOutputStream

java.lang.Object

java.io.OutputStream

org.ka2ddo.yaac.io.NonshareableByteArrayOutputStream

All Implemented Interfaces:

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

public class NonshareableByteArrayOutputStream
extends java.io.OutputStream

This class is a stripped-down version of the JRE's ByteArrayOutputStream, which allows direct access to the underlying byte array instead of making copies, is not synchronized (for speed), and doesn't do String conversions.

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	buf The buffer where data is stored.
protected int	count The number of valid bytes in the buffer.

Constructor Summary

Constructors

Constructor and Description
NonshareableByteArrayOutputStream(int size) Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.

Method Summary

Modifier and Type	Method and Description
void	close() Closing a ByteArrayOutputStream has no effect.
byte[]	getByteArray() Returns a reference to the current contents of this output stream; bytes at or past the index == size() are undefined.
void	reset() Resets the count field of this byte array output stream to zero, so that all currently accumulated output in the output stream is discarded.
int	size() Returns the current usage of the buffer.
void	write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this byte array output stream.
void	write(int b) Writes the specified byte to this byte array output stream.
void	writeTo(java.io.OutputStream out) Writes the complete contents of this byte array output stream to the specified output stream argument, as if by calling the output stream's write method using out.write(buf, 0, count).

Methods inherited from class java.io.OutputStream

flush, write

Methods inherited from class java.lang.Object

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

Field Detail

buf

protected byte[] buf

The buffer where data is stored.

count

protected int count

The number of valid bytes in the buffer.

Constructor Detail

NonshareableByteArrayOutputStream

public NonshareableByteArrayOutputStream(int size)

Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.

Parameters:

size - the initial size.

Throws:

java.lang.IllegalArgumentException - if size is negative.

Method Detail

write

public void write(int b)

Writes the specified byte to this byte array output stream.

Specified by:

write in class java.io.OutputStream

Parameters:

b - the byte to be written.

write

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

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

Overrides:

write in class java.io.OutputStream

Parameters:

b - the data.

off - the start offset in the data.

len - the number of bytes to write.

writeTo

public void writeTo(java.io.OutputStream out)
             throws java.io.IOException

Writes the complete contents of this byte array output stream to the specified output stream argument, as if by calling the output stream's write method using out.write(buf, 0, count).

Parameters:

out - the output stream to which to write the data.

Throws:

java.io.IOException - if an I/O error occurs.

reset

public void reset()

Resets the count field of this byte array output stream to zero, so that all currently accumulated output in the output stream is discarded. The output stream can be used again, reusing the already allocated buffer space.

getByteArray

public byte[] getByteArray()

Returns a reference to the current contents of this output stream; bytes at or past the index == size() are undefined.

Returns:

the current contents of this output stream, as a byte array.

See Also:

size()

size

public int size()

Returns the current usage of the buffer. Note this can be less than the actual internal array size, as the array is expanded in chunks to minimize heap thrashing.

Returns:

the value of the count field, which is the number of valid bytes in this output stream.

close

public void close()
           throws java.io.IOException

Closing a ByteArrayOutputStream has no effect. The methods in this class can be called after the stream has been closed without generating an IOException.

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.OutputStream

Throws:

java.io.IOException