GigaSpaces XAP 9.7.2 API

net.jini.io
Class OptimizedByteArrayOutputStream

java.lang.Object
  extended by java.io.OutputStream
      extended by net.jini.io.OptimizedByteArrayOutputStream
All Implemented Interfaces:
Closeable, Flushable

public class OptimizedByteArrayOutputStream
extends OutputStream

This class is an optimized porting of java.io.ByteArrayOutputStream: a) All methods are not synchronized. b) Most safety checks have been removed. c) ensureCapacity method have been added, for low level optimizations. Naturally, this class and all of its methods are not thread safe.

Since:
6.6
Author:
niv

Field Summary
protected  byte[] _buffer
          The buffer where data is stored.
protected  int _count
          The number of valid bytes in the buffer.
 
Constructor Summary
OptimizedByteArrayOutputStream()
          Creates a new byte array output stream.
OptimizedByteArrayOutputStream(int capacity)
          Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.
 
Method Summary
 void copyToBuffer(ByteBuffer buffer)
          Copy internal buffer
 boolean ensureCapacity(int delta)
           
 byte[] getBuffer()
          Gets internal buffers
 int getCapacity()
          The current buffer capacity.
 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.
 void setBuffer(byte[] buf)
          Set stream buffer, and reset the counter.
 void setBuffer(byte[] buffer, int count)
          Set stream buffer and set the counter.
 void setSize(int size)
          Set the buffer size.
 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 writeByte(byte b)
           
 void writeTo(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
close, flush, write
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

_buffer

protected byte[] _buffer
The buffer where data is stored.


_count

protected int _count
The number of valid bytes in the buffer.

Constructor Detail

OptimizedByteArrayOutputStream

public OptimizedByteArrayOutputStream()
Creates a new byte array output stream. The buffer capacity is initially 32 bytes, though its size increases if necessary.


OptimizedByteArrayOutputStream

public OptimizedByteArrayOutputStream(int capacity)
Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.

Parameters:
capacity - the initial capacity.
Throws:
IllegalArgumentException - if size is negative.
Method Detail

copyToBuffer

public final void copyToBuffer(ByteBuffer buffer)
Copy internal buffer


setBuffer

public void setBuffer(byte[] buf)
Set stream buffer, and reset the counter.

Parameters:
buf - new buffer

setBuffer

public void setBuffer(byte[] buffer,
                      int count)
Set stream buffer and set the counter.

Parameters:
count - amount of valid bytes

getBuffer

public byte[] getBuffer()
Gets internal buffers

Returns:
internal buffer

setSize

public void setSize(int size)
Set the buffer size.

Parameters:
size - amount of valid bytes

size

public int size()
Returns the current size of the buffer.

Returns:
the value of the count field, which is the number of valid bytes in this output stream.
See Also:
ByteArrayOutputStream.count

getCapacity

public int getCapacity()
The current buffer capacity.

Returns:
buffer current capacity

write

public void write(int b)
Writes the specified byte to this byte array output stream.

Specified by:
write in class OutputStream
Parameters:
b - the byte to be written.

writeByte

public void writeByte(byte b)

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 OutputStream
Parameters:
b - the data.
off - the start offset in the data.
len - the number of bytes to write.

ensureCapacity

public boolean ensureCapacity(int delta)

writeTo

public void writeTo(OutputStream out)
             throws 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:
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.

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.

Returns:
the current contents of this output stream, as a byte array.
See Also:
ByteArrayOutputStream.size()

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