Package org.apache.jackrabbit.oak.commons

Class Buffer

java.lang.Object

org.apache.jackrabbit.oak.commons.Buffer

public final class Buffer
extends Object

This is a wrapper around ByteBuffer. It maintains the same semantics and mechanisms of the ByteBuffer.

Java 9 introduced API changes to some methods in ByteBuffer. Instead of returning instances of Buffer, those methods were rewritten to return instances of ByteBuffer instead. While this is perfectly fine at compile time, running "modern" code on Java 8 and earlier throws NoSuchMethodError. In order to prevent occurrences of this exceptions in the future, Buffer is used consistently in place of ByteBuffer. Since it is not possible to directly convert a Buffer into a ByteBuffer and the other way around, Buffer makes it less likely to develop dangerous code in the future.

Method Summary

Modifier and Type	Method	Description
static Buffer	allocate(int cap)
static Buffer	allocateDirect(int cap)
byte[]	array()
Buffer	asReadOnlyBuffer()
int	capacity()
CharBuffer	decode(Charset charset)
Buffer	duplicate()
boolean	equals(Object obj)
Buffer	flip()
byte	get()
Buffer	get(byte[] b)
Buffer	get(byte[] b, int pos, int len)
byte	get(int pos)
int	getInt()
int	getInt(int pos)
long	getLong()
long	getLong(int pos)
short	getShort()
short	getShort(int pos)
int	hashCode()
boolean	hasRemaining()
boolean	isDirect()
int	limit()
Buffer	limit(int lim)
static Buffer	map(FileChannel channel, FileChannel.MapMode mode, long position, long size)
Buffer	mark()
int	position()
Buffer	position(int pos)
Buffer	put(byte b)
Buffer	put(byte[] b)
Buffer	put(byte[] buf, int pos, int len)
Buffer	put(Buffer b)
Buffer	putInt(int i)
Buffer	putLong(long l)
int	readFully(FileChannel channel, int position)
int	remaining()
Buffer	reset()
Buffer	rewind()
Buffer	slice()
void	update(CRC32 checksum)
static Buffer	wrap(byte[] buffer)
static Buffer	wrap(byte[] buffer, int pos, int len)
int	write(WritableByteChannel channel)

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Method Details

map

public static Buffer map(FileChannel channel,
 FileChannel.MapMode mode,
 long position,
 long size)
                  throws IOException

Throws:

IOException

wrap

public static Buffer wrap(byte[] buffer)

wrap

public static Buffer wrap(byte[] buffer,
 int pos,
 int len)

allocate

public static Buffer allocate(int cap)

allocateDirect

public static Buffer allocateDirect(int cap)

remaining

public int remaining()

asReadOnlyBuffer

public Buffer asReadOnlyBuffer()

position

public Buffer position(int pos)

position

public int position()

limit

public Buffer limit(int lim)

limit

public int limit()

slice

public Buffer slice()

readFully

public int readFully(FileChannel channel,
 int position)
              throws IOException

Throws:

IOException

flip

public Buffer flip()

getInt

public int getInt()

getInt

public int getInt(int pos)

mark

public Buffer mark()

get

public Buffer get(byte[] b)

get

public Buffer get(byte[] b,
 int pos,
 int len)

get

public byte get(int pos)

get

public byte get()

reset

public Buffer reset()

update

public void update(CRC32 checksum)

array

public byte[] array()

capacity

public int capacity()

isDirect

public boolean isDirect()

put

public Buffer put(byte[] b)

put

public Buffer put(byte[] buf,
 int pos,
 int len)

put

public Buffer put(byte b)

put

public Buffer put(Buffer b)

rewind

public Buffer rewind()

getLong

public long getLong(int pos)

getLong

public long getLong()

getShort

public short getShort(int pos)

getShort

public short getShort()

duplicate

public Buffer duplicate()

decode

public CharBuffer decode(Charset charset)

hasRemaining

public boolean hasRemaining()

write

public int write(WritableByteChannel channel)
          throws IOException

Throws:

IOException

putInt

public Buffer putInt(int i)

putLong

public Buffer putLong(long l)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object