ByteBufferBackedChannelBuffer

java.lang.Object
- org.jboss.netty.buffer.AbstractChannelBuffer
- - org.jboss.netty.buffer.ByteBufferBackedChannelBuffer

All Implemented Interfaces:

java.lang.Comparable<ChannelBuffer>, ChannelBuffer
```
public class ByteBufferBackedChannelBuffer
extends AbstractChannelBuffer
```
A NIO ByteBuffer based buffer. It is recommended to use ChannelBuffers.directBuffer(int) and ChannelBuffers.wrappedBuffer(ByteBuffer) instead of calling the constructor explicitly.

Field Summary

Fields
Modifier and Type Field and Description

private java.nio.ByteBuffer buffer

private int capacity

private java.nio.ByteOrder order

Fields
Modifier and Type	Field and Description
`private java.nio.ByteBuffer`	`buffer`
`private int`	`capacity`
`private java.nio.ByteOrder`	`order`

Constructor Summary

Constructors
Modifier	Constructor and Description
	`ByteBufferBackedChannelBuffer(java.nio.ByteBuffer buffer)` Creates a new buffer which wraps the specified buffer's slice.
`private`	`ByteBufferBackedChannelBuffer(ByteBufferBackedChannelBuffer buffer)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`byte[]`	`array()` Returns the backing byte array of this buffer.
`int`	`arrayOffset()` Returns the offset of the first byte within the backing byte array of this buffer.
`int`	`capacity()` Returns the number of bytes (octets) this buffer can contain.
`ChannelBuffer`	`copy(int index, int length)` Returns a copy of this buffer's sub-region.
`ChannelBuffer`	`duplicate()` Returns a buffer which shares the whole region of this buffer.
`ChannelBufferFactory`	`factory()` Returns the factory which creates a `ChannelBuffer` whose type and default `ByteOrder` are same with this buffer.
`byte`	`getByte(int index)` Gets a byte at the specified absolute `index` in this buffer.
`void`	`getBytes(int index, byte[] dst, int dstIndex, int length)` Transfers this buffer's data to the specified destination starting at the specified absolute `index`.
`void`	`getBytes(int index, java.nio.ByteBuffer dst)` Transfers this buffer's data to the specified destination starting at the specified absolute `index` until the destination's position reaches its limit.
`void`	`getBytes(int index, ChannelBuffer dst, int dstIndex, int length)` Transfers this buffer's data to the specified destination starting at the specified absolute `index`.
`int`	`getBytes(int index, java.nio.channels.GatheringByteChannel out, int length)` Transfers this buffer's data to the specified channel starting at the specified absolute `index`.
`void`	`getBytes(int index, java.io.OutputStream out, int length)` Transfers this buffer's data to the specified stream starting at the specified absolute `index`.
`int`	`getInt(int index)` Gets a 32-bit integer at the specified absolute `index` in this buffer.
`long`	`getLong(int index)` Gets a 64-bit long integer at the specified absolute `index` in this buffer.
`short`	`getShort(int index)` Gets a 16-bit short integer at the specified absolute `index` in this buffer.
`int`	`getUnsignedMedium(int index)` Gets an unsigned 24-bit medium integer at the specified absolute `index` in this buffer.
`boolean`	`hasArray()` Returns `true` if and only if this buffer has a backing byte array.
`boolean`	`isDirect()` Returns `true` if and only if this buffer is backed by an NIO direct buffer.
`java.nio.ByteOrder`	`order()` Returns the endianness of this buffer.
`void`	`setByte(int index, int value)` Sets the specified byte at the specified absolute `index` in this buffer.
`void`	`setBytes(int index, byte[] src, int srcIndex, int length)` Transfers the specified source array's data to this buffer starting at the specified absolute `index`.
`void`	`setBytes(int index, java.nio.ByteBuffer src)` Transfers the specified source buffer's data to this buffer starting at the specified absolute `index` until the source buffer's position reaches its limit.
`void`	`setBytes(int index, ChannelBuffer src, int srcIndex, int length)` Transfers the specified source buffer's data to this buffer starting at the specified absolute `index`.
`int`	`setBytes(int index, java.io.InputStream in, int length)` Transfers the content of the specified source stream to this buffer starting at the specified absolute `index`.
`int`	`setBytes(int index, java.nio.channels.ScatteringByteChannel in, int length)` Transfers the content of the specified source channel to this buffer starting at the specified absolute `index`.
`void`	`setInt(int index, int value)` Sets the specified 32-bit integer at the specified absolute `index` in this buffer.
`void`	`setLong(int index, long value)` Sets the specified 64-bit long integer at the specified absolute `index` in this buffer.
`void`	`setMedium(int index, int value)` Sets the specified 24-bit medium integer at the specified absolute `index` in this buffer.
`void`	`setShort(int index, int value)` Sets the specified 16-bit short integer at the specified absolute `index` in this buffer.
`ChannelBuffer`	`slice(int index, int length)` Returns a slice of this buffer's sub-region.
`java.nio.ByteBuffer`	`toByteBuffer(int index, int length)` Converts this buffer's sub-region into a NIO buffer.

Methods inherited from class org.jboss.netty.buffer.AbstractChannelBuffer
bytesBefore, bytesBefore, bytesBefore, bytesBefore, bytesBefore, bytesBefore, checkReadableBytes, clear, compareTo, copy, discardReadBytes, ensureWritableBytes, equals, getBytes, getBytes, getBytes, getChar, getDouble, getFloat, getMedium, getUnsignedByte, getUnsignedInt, getUnsignedShort, hashCode, indexOf, indexOf, markReaderIndex, markWriterIndex, readable, readableBytes, readByte, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readChar, readDouble, readerIndex, readerIndex, readFloat, readInt, readLong, readMedium, readShort, readSlice, readUnsignedByte, readUnsignedInt, readUnsignedMedium, readUnsignedShort, resetReaderIndex, resetWriterIndex, setBytes, setBytes, setBytes, setChar, setDouble, setFloat, setIndex, setZero, skipBytes, slice, toByteBuffer, toByteBuffers, toByteBuffers, toString, toString, toString, writable, writableBytes, writeByte, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeChar, writeDouble, writeFloat, writeInt, writeLong, writeMedium, writerIndex, writerIndex, writeShort, writeZero

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - buffer
```
private final java.nio.ByteBuffer buffer
```
  - order
```
private final java.nio.ByteOrder order
```
  - capacity
```
private final int capacity
```
- Constructor Detail
  - ByteBufferBackedChannelBuffer
```
public ByteBufferBackedChannelBuffer(java.nio.ByteBuffer buffer)
```
    Creates a new buffer which wraps the specified buffer's slice.
  - ByteBufferBackedChannelBuffer
```
private ByteBufferBackedChannelBuffer(ByteBufferBackedChannelBuffer buffer)
```
- Method Detail
  - factory
```
public ChannelBufferFactory factory()
```
    Description copied from interface: ChannelBuffer
    
    Returns the factory which creates a ChannelBuffer whose type and default ByteOrder are same with this buffer.
  - isDirect
```
public boolean isDirect()
```
    Description copied from interface: ChannelBuffer
    
    Returns true if and only if this buffer is backed by an NIO direct buffer.
  - order
```
public java.nio.ByteOrder order()
```
    Description copied from interface: ChannelBuffer
    
    Returns the endianness of this buffer.
  - capacity
```
public int capacity()
```
    Description copied from interface: ChannelBuffer
    
    Returns the number of bytes (octets) this buffer can contain.
  - hasArray
```
public boolean hasArray()
```
    Description copied from interface: ChannelBuffer
    
    Returns true if and only if this buffer has a backing byte array. If this method returns true, you can safely call ChannelBuffer.array() and ChannelBuffer.arrayOffset().
  - array
```
public byte[] array()
```
    Description copied from interface: ChannelBuffer
    
    Returns the backing byte array of this buffer.
  - arrayOffset
```
public int arrayOffset()
```
    Description copied from interface: ChannelBuffer
    
    Returns the offset of the first byte within the backing byte array of this buffer.
  - getByte
```
public byte getByte(int index)
```
    Description copied from interface: ChannelBuffer
    
    Gets a byte at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
  - getShort
```
public short getShort(int index)
```
    Description copied from interface: ChannelBuffer
    
    Gets a 16-bit short integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
  - getUnsignedMedium
```
public int getUnsignedMedium(int index)
```
    Description copied from interface: ChannelBuffer
    
    Gets an unsigned 24-bit medium integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
  - getInt
```
public int getInt(int index)
```
    Description copied from interface: ChannelBuffer
    
    Gets a 32-bit integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
  - getLong
```
public long getLong(int index)
```
    Description copied from interface: ChannelBuffer
    
    Gets a 64-bit long integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
  - getBytes
```
public void getBytes(int index,
                     ChannelBuffer dst,
                     int dstIndex,
                     int length)
```
    Description copied from interface: ChannelBuffer
    
    Transfers this buffer's data to the specified destination starting at the specified absolute index. This method does not modify readerIndex or writerIndex of both the source (i.e. this) and the destination.
    
    dstIndex - the first index of the destination
    
    length - the number of bytes to transfer
  - getBytes
```
public void getBytes(int index,
                     byte[] dst,
                     int dstIndex,
                     int length)
```
    Description copied from interface: ChannelBuffer
    
    Transfers this buffer's data to the specified destination starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    dstIndex - the first index of the destination
    
    length - the number of bytes to transfer
  - getBytes
```
public void getBytes(int index,
                     java.nio.ByteBuffer dst)
```
    Description copied from interface: ChannelBuffer
    
    Transfers this buffer's data to the specified destination starting at the specified absolute index until the destination's position reaches its limit. This method does not modify readerIndex or writerIndex of this buffer while the destination's position will be increased.
  - setByte
```
public void setByte(int index,
                    int value)
```
    Description copied from interface: ChannelBuffer
    
    Sets the specified byte at the specified absolute index in this buffer. The 24 high-order bits of the specified value are ignored. This method does not modify readerIndex or writerIndex of this buffer.
  - setShort
```
public void setShort(int index,
                     int value)
```
    Description copied from interface: ChannelBuffer
    
    Sets the specified 16-bit short integer at the specified absolute index in this buffer. The 16 high-order bits of the specified value are ignored. This method does not modify readerIndex or writerIndex of this buffer.
  - setMedium
```
public void setMedium(int index,
                      int value)
```
    Description copied from interface: ChannelBuffer
    
    Sets the specified 24-bit medium integer at the specified absolute index in this buffer. Please note that the most significant byte is ignored in the specified value. This method does not modify readerIndex or writerIndex of this buffer.
  - setInt
```
public void setInt(int index,
                   int value)
```
    Description copied from interface: ChannelBuffer
    
    Sets the specified 32-bit integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
  - setLong
```
public void setLong(int index,
                    long value)
```
    Description copied from interface: ChannelBuffer
    
    Sets the specified 64-bit long integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
  - setBytes
```
public void setBytes(int index,
                     ChannelBuffer src,
                     int srcIndex,
                     int length)
```
    Description copied from interface: ChannelBuffer
    
    Transfers the specified source buffer's data to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of both the source (i.e. this) and the destination.
    
    srcIndex - the first index of the source
    
    length - the number of bytes to transfer
  - setBytes
```
public void setBytes(int index,
                     byte[] src,
                     int srcIndex,
                     int length)
```
    Description copied from interface: ChannelBuffer
    
    Transfers the specified source array's data to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
  - setBytes
```
public void setBytes(int index,
                     java.nio.ByteBuffer src)
```
    Description copied from interface: ChannelBuffer
    
    Transfers the specified source buffer's data to this buffer starting at the specified absolute index until the source buffer's position reaches its limit. This method does not modify readerIndex or writerIndex of this buffer.
  - getBytes
```
public void getBytes(int index,
                     java.io.OutputStream out,
                     int length)
              throws java.io.IOException
```
    Description copied from interface: ChannelBuffer
    
    Transfers this buffer's data to the specified stream starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    length - the number of bytes to transfer
    
    Throws:
    
    java.io.IOException - if the specified stream threw an exception during I/O
  - getBytes
```
public int getBytes(int index,
                    java.nio.channels.GatheringByteChannel out,
                    int length)
             throws java.io.IOException
```
    Description copied from interface: ChannelBuffer
    
    Transfers this buffer's data to the specified channel starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    length - the maximum number of bytes to transfer
    
    Returns:
    
    the actual number of bytes written out to the specified channel
    
    Throws:
    
    java.io.IOException - if the specified channel threw an exception during I/O
  - setBytes
```
public int setBytes(int index,
                    java.io.InputStream in,
                    int length)
             throws java.io.IOException
```
    Description copied from interface: ChannelBuffer
    
    Transfers the content of the specified source stream to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    length - the number of bytes to transfer
    
    Returns:
    
    the actual number of bytes read in from the specified channel. -1 if the specified channel is closed.
    
    Throws:
    
    java.io.IOException - if the specified stream threw an exception during I/O
  - setBytes
```
public int setBytes(int index,
                    java.nio.channels.ScatteringByteChannel in,
                    int length)
             throws java.io.IOException
```
    Description copied from interface: ChannelBuffer
    
    Transfers the content of the specified source channel to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.
    
    length - the maximum number of bytes to transfer
    
    Returns:
    
    the actual number of bytes read in from the specified channel. -1 if the specified channel is closed.
    
    Throws:
    
    java.io.IOException - if the specified channel threw an exception during I/O
  - toByteBuffer
```
public java.nio.ByteBuffer toByteBuffer(int index,
                                        int length)
```
    Description copied from interface: ChannelBuffer
    
    Converts this buffer's sub-region into a NIO buffer. The returned buffer might or might not share the content with this buffer, while they have separate indexes and marks. This method does not modify readerIndex or writerIndex of this buffer.
  - slice
```
public ChannelBuffer slice(int index,
                           int length)
```
    Description copied from interface: ChannelBuffer
    
    Returns a slice of this buffer's sub-region. Modifying the content of the returned buffer or this buffer affects each other's content while they maintain separate indexes and marks. This method does not modify readerIndex or writerIndex of this buffer.
  - duplicate
```
public ChannelBuffer duplicate()
```
    Description copied from interface: ChannelBuffer
    
    Returns a buffer which shares the whole region of this buffer. Modifying the content of the returned buffer or this buffer affects each other's content while they maintain separate indexes and marks. This method is identical to buf.slice(0, buf.capacity()). This method does not modify readerIndex or writerIndex of this buffer.
  - copy
```
public ChannelBuffer copy(int index,
                          int length)
```
    Description copied from interface: ChannelBuffer
    
    Returns a copy of this buffer's sub-region. Modifying the content of the returned buffer or this buffer does not affect each other at all. This method does not modify readerIndex or writerIndex of this buffer.

Class ByteBufferBackedChannelBuffer

Field Summary

Constructor Summary

Method Summary

Methods inherited from class org.jboss.netty.buffer.AbstractChannelBuffer

Methods inherited from class java.lang.Object

Field Detail

buffer

order

capacity

Constructor Detail

ByteBufferBackedChannelBuffer

ByteBufferBackedChannelBuffer

Method Detail

factory

isDirect

order

capacity

hasArray

array

arrayOffset

getByte

getShort

getUnsignedMedium

getInt

getLong

getBytes

getBytes

getBytes

setByte

setShort

setMedium

setInt

setLong

setBytes

setBytes

setBytes

getBytes

getBytes

setBytes

setBytes

toByteBuffer

slice

duplicate

copy