net.sf.asyncobjects.io
Class BinaryData.ByteIterator

java.lang.Object
  net.sf.asyncobjects.io.BinaryData.ByteIterator

Enclosing class:

BinaryData

public abstract static class BinaryData.ByteIterator
extends Object

A base class for byte iterators.

Field Summary

protected int	current current position
protected int	limit current position

Method Summary

protected void	advanceNext() Subclasses call this method to ensure that iterator could move further
protected void	checkNext() Subclass call this method to ensure that it is possible to advance further.
boolean	hasNext()
int	next()
abstract byte[]	nextArray(byte[] target, int targetStart, int size) Copy data to array
abstract byte	nextByte()
int	nextInt() Get next big endian int.
long	nextLong() Get next big endian long.
short	nextShort() Get big endian short at the specified posion.
abstract BinaryData	nextSubrange(int length) Next subrange
abstract byte	peekByte()
int	position()
void	skip(int n) Skip n bytes

Methods inherited from class java.lang.Object

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

Field Detail

current

protected int current

current position

limit

protected int limit

current position

Method Detail

position

public final int position()

Returns:

current position which binary data

hasNext

public final boolean hasNext()

Returns:

true if there is a next byte

next

public final int next()

Returns:

next unisgned byte value (nextByte() & 0xFF)

See Also:

nextByte()

advanceNext

protected final void advanceNext()

Subclasses call this method to ensure that iterator could move further

checkNext

protected void checkNext()

Subclass call this method to ensure that it is possible to advance further.

skip

public final void skip(int n)

Skip n bytes

Parameters:

n - amount of bytes to skip

nextByte

public abstract byte nextByte()

Returns:

next byte

nextInt

public final int nextInt()

Get next big endian int.

Returns:

next four bytes as integer

nextLong

public final long nextLong()

Get next big endian long.

Returns:

next eight bytes as long

nextShort

public final short nextShort()

Get big endian short at the specified posion.

Returns:

next two bytes as short

nextSubrange

public abstract BinaryData nextSubrange(int length)

Next subrange

Parameters:

length - a subrange length

Returns:

a new subrange

nextArray

public abstract byte[] nextArray(byte[] target,
                                 int targetStart,
                                 int size)

Copy data to array

Parameters:

target - a target array

targetStart - start in array to copy

size - a size to copy

Returns:

target array

peekByte

public abstract byte peekByte()

Returns:

peek next byte