com.sun.squawk
Class ByteBufferEncoder

java.lang.Object
  com.sun.squawk.ByteBufferEncoder

public final class ByteBufferEncoder
extends Object

A byte buffer encoder can be used to build a byte array of values encoded using a space-saving encoding. The byte array can be decoded with a byte buffer decoder.

Field Summary

protected byte[]	buffer The data written to this buffer.
protected int	count The amount of data written to the buffer.

Constructor Summary

ByteBufferEncoder()

Method Summary

void	add(ByteBufferEncoder buf) Adds the contents of another ByteBuffer to this buffer.
void	addUnencodedByte(int value) Adds an unencoded byte to the buffer.
void	addUnsignedByte(int value) Adds an unsigned byte value to the buffer.
void	addUnsignedShort(int value) Adds an unsigned short value to the buffer.
void	addUtf8(String s) Adds a string to the buffer in UTF8 encoded form.
protected void	ensure(int needed) Ensures that the buffer is large enough.
void	reset() Clears the buffer.
byte[]	toByteArray() Gets the contents of this buffer as a byte array.

Methods inherited from class java.lang.Object

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

Field Detail

count

protected int count

The amount of data written to the buffer.

buffer

protected byte[] buffer

The data written to this buffer.

Constructor Detail

ByteBufferEncoder

public ByteBufferEncoder()

Method Detail

reset

public void reset()

Clears the buffer.

ensure

protected final void ensure(int needed)

Ensures that the buffer is large enough.

Parameters:

needed - the extra amount of data about to be written

addUnencodedByte

public final void addUnencodedByte(int value)

Adds an unencoded byte to the buffer.

Parameters:

value - the byte to be added.

addUnsignedByte

public final void addUnsignedByte(int value)

Adds an unsigned byte value to the buffer.

Parameters:

value - the byte to be added (must be between 0 and 0xFF).

addUnsignedShort

public final void addUnsignedShort(int value)

Adds an unsigned short value to the buffer. The number of bytes added to the buffer will be 1 if value is less than 128 otherwise the value will be encoded in 2 bytes.

Parameters:

value - the byte to be added (must be between 0 and 0xFFFF).

addUtf8

public void addUtf8(String s)

Adds a string to the buffer in UTF8 encoded form. The length of the string is prepended with addUnsignedShort(int).

Parameters:

s - the string to add

add

public void add(ByteBufferEncoder buf)

Adds the contents of another ByteBuffer to this buffer. The length of buf is added with addUnsignedInt(int) before its contents are.

Parameters:

buf - the buffer to add

toByteArray

public byte[] toByteArray()

Gets the contents of this buffer as a byte array.

Returns:

the contents of this buffer as a byte array