org.bitcoinj.core

Class UnsafeByteArrayOutputStream

java.lang.Object

java.io.OutputStream

java.io.ByteArrayOutputStream

org.bitcoinj.core.UnsafeByteArrayOutputStream

All Implemented Interfaces:

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

public class UnsafeByteArrayOutputStream
extends java.io.ByteArrayOutputStream

An unsynchronized implementation of ByteArrayOutputStream that will return the backing byte array if its length == size(). This avoids unneeded array copy where the BOS is simply being used to extract a byte array of known length from a 'serialized to stream' method.

Unless the final length can be accurately predicted the only performance this will yield is due to unsynchronized methods.

Field Summary

Fields inherited from class java.io.ByteArrayOutputStream

buf, count

Constructor Summary

Constructors

Constructor and Description
UnsafeByteArrayOutputStream()
UnsafeByteArrayOutputStream(int size)

Method Summary

Modifier and Type	Method and Description
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 size of the buffer.
byte[]	toByteArray() Creates a newly allocated byte array.
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.ByteArrayOutputStream

close, toString, toString, toString

Methods inherited from class java.io.OutputStream

flush, write

Methods inherited from class java.lang.Object

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

Constructor Detail

UnsafeByteArrayOutputStream

public UnsafeByteArrayOutputStream()

UnsafeByteArrayOutputStream

public UnsafeByteArrayOutputStream(int size)

Method Detail

write

public void write(int b)

Writes the specified byte to this byte array output stream.

Overrides:

write in class java.io.ByteArrayOutputStream

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.ByteArrayOutputStream

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).

Overrides:

writeTo in class java.io.ByteArrayOutputStream

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.

Overrides:

reset in class java.io.ByteArrayOutputStream

See Also:

ByteArrayInputStream.count

toByteArray

public byte[] toByteArray()

Creates a newly allocated byte array. Its size is the current size of this output stream and the valid contents of the buffer have been copied into it.

Overrides:

toByteArray in class java.io.ByteArrayOutputStream

Returns:

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

See Also:

ByteArrayOutputStream.size()

size

public int size()

Returns the current size of the buffer.

Overrides:

size in class java.io.ByteArrayOutputStream

Returns:

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

See Also:

ByteArrayOutputStream.count