org.apache.activemq.store.kahadb.disk.util
Class DataByteArrayOutputStream

java.lang.Object
  java.io.OutputStream
      org.apache.activemq.store.kahadb.disk.util.DataByteArrayOutputStream

All Implemented Interfaces:

Closeable, DataOutput, Flushable

public class DataByteArrayOutputStream
extends OutputStream
implements DataOutput

Optimized ByteArrayOutputStream

Field Summary

protected byte[]	buf
protected int	pos

Constructor Summary

DataByteArrayOutputStream()
Creates a new byte array output stream.

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

Method Summary

ByteSequence	getByteSequence()
byte[]	getData()
protected void	onWrite() This method is called after each write to the buffer.
void	position(int offset) Set the current position for writing
void	reset() reset the output stream
void	restart() start using a fresh byte array
void	restart(int size) start using a fresh byte array
int	size()
void	skip(int size)
ByteSequence	toByteSequence() Get a ByteSequence from the stream
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	writeBoolean(boolean v)
void	writeByte(int v)
void	writeBytes(String s)
void	writeChar(int v)
void	writeChars(String s)
void	writeDouble(double v)
void	writeFloat(float v)
void	writeInt(int v)
void	writeLong(long v)
void	writeShort(int v)
void	writeUTF(String str)

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

Methods inherited from interface java.io.DataOutput

write

Field Detail

buf

protected byte[] buf

pos

protected int pos

Constructor Detail

DataByteArrayOutputStream

public DataByteArrayOutputStream(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:

IllegalArgumentException - if size is negative.

DataByteArrayOutputStream

public DataByteArrayOutputStream()

Creates a new byte array output stream.

Method Detail

restart

public void restart(int size)

start using a fresh byte array

Parameters:

size -

restart

public void restart()

start using a fresh byte array

toByteSequence

public ByteSequence toByteSequence()

Get a ByteSequence from the stream

Returns:

the byte sequence

write

public void write(int b)
           throws IOException

Writes the specified byte to this byte array output stream.

Specified by:

write in interface DataOutput

Specified by:

write in class OutputStream

Parameters:

b - the byte to be written.

Throws:

IOException

write

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

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

Specified by:

write in interface DataOutput

Overrides:

write in class OutputStream

Parameters:

b - the data.

off - the start offset in the data.

len - the number of bytes to write.

Throws:

IOException

getData

public byte[] getData()

Returns:

the underlying byte[] buffer

reset

public void reset()

reset the output stream

position

public void position(int offset)
              throws IOException

Set the current position for writing

Parameters:

offset -

Throws:

IOException

size

public int size()

writeBoolean

public void writeBoolean(boolean v)
                  throws IOException

Specified by:

writeBoolean in interface DataOutput

Throws:

IOException

writeByte

public void writeByte(int v)
               throws IOException

Specified by:

writeByte in interface DataOutput

Throws:

IOException

writeShort

public void writeShort(int v)
                throws IOException

Specified by:

writeShort in interface DataOutput

Throws:

IOException

writeChar

public void writeChar(int v)
               throws IOException

Specified by:

writeChar in interface DataOutput

Throws:

IOException

writeInt

public void writeInt(int v)
              throws IOException

Specified by:

writeInt in interface DataOutput

Throws:

IOException

writeLong

public void writeLong(long v)
               throws IOException

Specified by:

writeLong in interface DataOutput

Throws:

IOException

writeFloat

public void writeFloat(float v)
                throws IOException

Specified by:

writeFloat in interface DataOutput

Throws:

IOException

writeDouble

public void writeDouble(double v)
                 throws IOException

Specified by:

writeDouble in interface DataOutput

Throws:

IOException

writeBytes

public void writeBytes(String s)
                throws IOException

Specified by:

writeBytes in interface DataOutput

Throws:

IOException

writeChars

public void writeChars(String s)
                throws IOException

Specified by:

writeChars in interface DataOutput

Throws:

IOException

writeUTF

public void writeUTF(String str)
              throws IOException

Specified by:

writeUTF in interface DataOutput

Throws:

IOException

onWrite

protected void onWrite()
                throws IOException

This method is called after each write to the buffer. This should allow subclasses to take some action based on the writes, for example flushing data to an external system based on size.

Throws:

IOException

skip

public void skip(int size)
          throws IOException

Throws:

IOException

getByteSequence

public ByteSequence getByteSequence()