UnpooledDirectByteBuf (Netty API Reference (4.1.11.Final))

java.lang.Object
- io.netty.buffer.ByteBuf
- - io.netty.buffer.AbstractByteBuf
  - - io.netty.buffer.AbstractReferenceCountedByteBuf
    - - io.netty.buffer.UnpooledDirectByteBuf

All Implemented Interfaces:

ReferenceCounted, Comparable<ByteBuf>
```
public class UnpooledDirectByteBuf
extends AbstractReferenceCountedByteBuf
```
A NIO ByteBuffer based buffer. It is recommended to use Unpooled.directBuffer(int) and Unpooled.wrappedBuffer(ByteBuffer) instead of calling the constructor explicitly.

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`UnpooledDirectByteBuf(ByteBufAllocator alloc, ByteBuffer initialBuffer, int maxCapacity)` Creates a new direct buffer by wrapping the specified initial buffer.
`protected`	`UnpooledDirectByteBuf(ByteBufAllocator alloc, int initialCapacity, int maxCapacity)` Creates a new direct buffer.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected byte`	`_getByte(int index)`
`protected int`	`_getInt(int index)`
`protected int`	`_getIntLE(int index)`
`protected long`	`_getLong(int index)`
`protected long`	`_getLongLE(int index)`
`protected short`	`_getShort(int index)`
`protected short`	`_getShortLE(int index)`
`protected int`	`_getUnsignedMedium(int index)`
`protected int`	`_getUnsignedMediumLE(int index)`
`protected void`	`_setByte(int index, int value)`
`protected void`	`_setInt(int index, int value)`
`protected void`	`_setIntLE(int index, int value)`
`protected void`	`_setLong(int index, long value)`
`protected void`	`_setLongLE(int index, long value)`
`protected void`	`_setMedium(int index, int value)`
`protected void`	`_setMediumLE(int index, int value)`
`protected void`	`_setShort(int index, int value)`
`protected void`	`_setShortLE(int index, int value)`
`ByteBufAllocator`	`alloc()` Returns the `ByteBufAllocator` which created this buffer.
`protected ByteBuffer`	`allocateDirect(int initialCapacity)` Allocate a new direct `ByteBuffer` with the given initialCapacity.
`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.
`ByteBuf`	`capacity(int newCapacity)` Adjusts the capacity of this buffer.
`ByteBuf`	`copy(int index, int length)` Returns a copy of this buffer's sub-region.
`protected void`	`deallocate()` Called once `AbstractReferenceCountedByteBuf.refCnt()` is equals 0.
`protected void`	`freeDirect(ByteBuffer buffer)` Free a direct `ByteBuffer`
`byte`	`getByte(int index)` Gets a byte at the specified absolute `index` in this buffer.
`ByteBuf`	`getBytes(int index, byte[] dst, int dstIndex, int length)` Transfers this buffer's data to the specified destination starting at the specified absolute `index`.
`ByteBuf`	`getBytes(int index, 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.
`ByteBuf`	`getBytes(int index, ByteBuf dst, int dstIndex, int length)` Transfers this buffer's data to the specified destination starting at the specified absolute `index`.
`int`	`getBytes(int index, FileChannel out, long position, int length)` Transfers this buffer's data starting at the specified absolute `index` to the specified channel starting at the given file position.
`int`	`getBytes(int index, GatheringByteChannel out, int length)` Transfers this buffer's data to the specified channel starting at the specified absolute `index`.
`ByteBuf`	`getBytes(int index, 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`	`hasMemoryAddress()` Returns `true` if and only if this buffer has a reference to the low-level memory address that points to the backing data.
`ByteBuffer`	`internalNioBuffer(int index, int length)` Internal use only: Exposes the internal NIO buffer.
`boolean`	`isDirect()` Returns `true` if and only if this buffer is backed by an NIO direct buffer.
`long`	`memoryAddress()` Returns the low-level memory address that point to the first byte of ths backing data.
`ByteBuffer`	`nioBuffer(int index, int length)` Exposes this buffer's sub-region as an NIO `ByteBuffer`.
`int`	`nioBufferCount()` Returns the maximum number of NIO `ByteBuffer`s that consist this buffer.
`ByteBuffer[]`	`nioBuffers(int index, int length)` Exposes this buffer's bytes as an NIO `ByteBuffer`'s for the specified index and length The returned buffer shares the content with this buffer, while changing the position and limit of the returned NIO buffer does not affect the indexes and marks of this buffer.
`ByteOrder`	`order()` Returns the endianness of this buffer.
`ByteBuf`	`readBytes(byte[] dst, int dstIndex, int length)` Transfers this buffer's data to the specified destination starting at the current `readerIndex` and increases the `readerIndex` by the number of the transferred bytes (= `length`).
`ByteBuf`	`readBytes(ByteBuffer dst)` Transfers this buffer's data to the specified destination starting at the current `readerIndex` until the destination's position reaches its limit, and increases the `readerIndex` by the number of the transferred bytes.
`int`	`readBytes(FileChannel out, long position, int length)` Transfers this buffer's data starting at the current `readerIndex` to the specified channel starting at the given file position.
`int`	`readBytes(GatheringByteChannel out, int length)` Transfers this buffer's data to the specified stream starting at the current `readerIndex`.
`ByteBuf`	`readBytes(OutputStream out, int length)` Transfers this buffer's data to the specified stream starting at the current `readerIndex`.
`ByteBuf`	`setByte(int index, int value)` Sets the specified byte at the specified absolute `index` in this buffer.
`ByteBuf`	`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`.
`ByteBuf`	`setBytes(int index, 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.
`ByteBuf`	`setBytes(int index, ByteBuf 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, FileChannel in, long position, int length)` Transfers the content of the specified source channel starting at the given file position to this buffer starting at the specified absolute `index`.
`int`	`setBytes(int index, 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, ScatteringByteChannel in, int length)` Transfers the content of the specified source channel to this buffer starting at the specified absolute `index`.
`ByteBuf`	`setInt(int index, int value)` Sets the specified 32-bit integer at the specified absolute `index` in this buffer.
`ByteBuf`	`setLong(int index, long value)` Sets the specified 64-bit long integer at the specified absolute `index` in this buffer.
`ByteBuf`	`setMedium(int index, int value)` Sets the specified 24-bit medium integer at the specified absolute `index` in this buffer.
`ByteBuf`	`setShort(int index, int value)` Sets the specified 16-bit short integer at the specified absolute `index` in this buffer.
`ByteBuf`	`unwrap()` Return the underlying buffer instance if this buffer is a wrapper of another buffer.

Methods inherited from class io.netty.buffer.AbstractReferenceCountedByteBuf
refCnt, release, release, retain, retain, setRefCnt, touch, touch

Methods inherited from class io.netty.buffer.AbstractByteBuf
adjustMarkers, asReadOnly, bytesBefore, bytesBefore, bytesBefore, checkDstIndex, checkIndex, checkIndex, checkNewCapacity, checkReadableBytes, checkSrcIndex, clear, compareTo, copy, discardReadBytes, discardSomeReadBytes, duplicate, ensureAccessible, ensureWritable, ensureWritable, equals, forEachByte, forEachByte, forEachByteDesc, forEachByteDesc, getBoolean, getBytes, getBytes, getBytes, getChar, getCharSequence, getDouble, getFloat, getIntLE, getLongLE, getMedium, getMediumLE, getShortLE, getUnsignedByte, getUnsignedInt, getUnsignedIntLE, getUnsignedMediumLE, getUnsignedShort, getUnsignedShortLE, hashCode, indexOf, isReadable, isReadable, isReadOnly, isWritable, isWritable, markReaderIndex, markWriterIndex, maxCapacity, maxCapacity, maxWritableBytes, newSwappedByteBuf, nioBuffer, nioBuffers, order, readableBytes, readBoolean, readByte, readBytes, readBytes, readBytes, readBytes, readBytes, readChar, readCharSequence, readDouble, readerIndex, readerIndex, readFloat, readInt, readIntLE, readLong, readLongLE, readMedium, readMediumLE, readRetainedSlice, readShort, readShortLE, readSlice, readUnsignedByte, readUnsignedInt, readUnsignedIntLE, readUnsignedMedium, readUnsignedMediumLE, readUnsignedShort, readUnsignedShortLE, resetReaderIndex, resetWriterIndex, retainedDuplicate, retainedSlice, retainedSlice, setBoolean, setBytes, setBytes, setBytes, setChar, setCharSequence, setDouble, setFloat, setIndex, setIntLE, setLongLE, setMediumLE, setShortLE, setZero, skipBytes, slice, slice, toString, toString, toString, writableBytes, writeBoolean, writeByte, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeBytes, writeChar, writeCharSequence, writeDouble, writeFloat, writeInt, writeIntLE, writeLong, writeLongLE, writeMedium, writeMediumLE, writerIndex, writerIndex, writeShort, writeShortLE, writeZero

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

- Constructor Detail
  - UnpooledDirectByteBuf
```
protected UnpooledDirectByteBuf(ByteBufAllocator alloc,
                                int initialCapacity,
                                int maxCapacity)
```
    Creates a new direct buffer.
    
    Parameters:
    
    initialCapacity - the initial capacity of the underlying direct buffer
    
    maxCapacity - the maximum capacity of the underlying direct buffer
  - UnpooledDirectByteBuf
```
protected UnpooledDirectByteBuf(ByteBufAllocator alloc,
                                ByteBuffer initialBuffer,
                                int maxCapacity)
```
    Creates a new direct buffer by wrapping the specified initial buffer.
    
    Parameters:
    
    maxCapacity - the maximum capacity of the underlying direct buffer
- Method Detail
  - allocateDirect
```
protected ByteBuffer allocateDirect(int initialCapacity)
```
    Allocate a new direct ByteBuffer with the given initialCapacity.
  - freeDirect
```
protected void freeDirect(ByteBuffer buffer)
```
    Free a direct ByteBuffer
  - isDirect
```
public boolean isDirect()
```
    Description copied from class: ByteBuf
    
    Returns true if and only if this buffer is backed by an NIO direct buffer.
    
    Specified by:
    
    isDirect in class ByteBuf
  - capacity
```
public int capacity()
```
    Description copied from class: ByteBuf
    
    Returns the number of bytes (octets) this buffer can contain.
    
    Specified by:
    
    capacity in class ByteBuf
  - capacity
```
public ByteBuf capacity(int newCapacity)
```
    Description copied from class: ByteBuf
    
    Adjusts the capacity of this buffer. If the newCapacity is less than the current capacity, the content of this buffer is truncated. If the newCapacity is greater than the current capacity, the buffer is appended with unspecified data whose length is (newCapacity - currentCapacity).
    
    Specified by:
    
    capacity in class ByteBuf
  - alloc
```
public ByteBufAllocator alloc()
```
    Description copied from class: ByteBuf
    
    Returns the ByteBufAllocator which created this buffer.
    
    Specified by:
    
    alloc in class ByteBuf
  - order
```
public ByteOrder order()
```
    Description copied from class: ByteBuf
    
    Returns the endianness of this buffer.
    
    Specified by:
    
    order in class ByteBuf
  - hasArray
```
public boolean hasArray()
```
    Description copied from class: ByteBuf
    
    Returns true if and only if this buffer has a backing byte array. If this method returns true, you can safely call ByteBuf.array() and ByteBuf.arrayOffset().
    
    Specified by:
    
    hasArray in class ByteBuf
  - array
```
public byte[] array()
```
    Description copied from class: ByteBuf
    
    Returns the backing byte array of this buffer.
    
    Specified by:
    
    array in class ByteBuf
  - arrayOffset
```
public int arrayOffset()
```
    Description copied from class: ByteBuf
    
    Returns the offset of the first byte within the backing byte array of this buffer.
    
    Specified by:
    
    arrayOffset in class ByteBuf
  - hasMemoryAddress
```
public boolean hasMemoryAddress()
```
    Description copied from class: ByteBuf
    
    Returns true if and only if this buffer has a reference to the low-level memory address that points to the backing data.
    
    Specified by:
    
    hasMemoryAddress in class ByteBuf
  - memoryAddress
```
public long memoryAddress()
```
    Description copied from class: ByteBuf
    
    Returns the low-level memory address that point to the first byte of ths backing data.
    
    Specified by:
    
    memoryAddress in class ByteBuf
  - getByte
```
public byte getByte(int index)
```
    Description copied from class: ByteBuf
    
    Gets a byte at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    Overrides:
    
    getByte in class AbstractByteBuf
  - _getByte
```
protected byte _getByte(int index)
```
    Specified by:
    
    _getByte in class AbstractByteBuf
  - getShort
```
public short getShort(int index)
```
    Description copied from class: ByteBuf
    
    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.
    
    Overrides:
    
    getShort in class AbstractByteBuf
  - _getShort
```
protected short _getShort(int index)
```
    Specified by:
    
    _getShort in class AbstractByteBuf
  - _getShortLE
```
protected short _getShortLE(int index)
```
    Specified by:
    
    _getShortLE in class AbstractByteBuf
  - getUnsignedMedium
```
public int getUnsignedMedium(int index)
```
    Description copied from class: ByteBuf
    
    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.
    
    Overrides:
    
    getUnsignedMedium in class AbstractByteBuf
  - _getUnsignedMedium
```
protected int _getUnsignedMedium(int index)
```
    Specified by:
    
    _getUnsignedMedium in class AbstractByteBuf
  - _getUnsignedMediumLE
```
protected int _getUnsignedMediumLE(int index)
```
    Specified by:
    
    _getUnsignedMediumLE in class AbstractByteBuf
  - getInt
```
public int getInt(int index)
```
    Description copied from class: ByteBuf
    
    Gets a 32-bit integer at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.
    
    Overrides:
    
    getInt in class AbstractByteBuf
  - _getInt
```
protected int _getInt(int index)
```
    Specified by:
    
    _getInt in class AbstractByteBuf
  - _getIntLE
```
protected int _getIntLE(int index)
```
    Specified by:
    
    _getIntLE in class AbstractByteBuf
  - getLong
```
public long getLong(int index)
```
    Description copied from class: ByteBuf
    
    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.
    
    Overrides:
    
    getLong in class AbstractByteBuf
  - _getLong
```
protected long _getLong(int index)
```
    Specified by:
    
    _getLong in class AbstractByteBuf
  - _getLongLE
```
protected long _getLongLE(int index)
```
    Specified by:
    
    _getLongLE in class AbstractByteBuf
  - getBytes
```
public ByteBuf getBytes(int index,
                        ByteBuf dst,
                        int dstIndex,
                        int length)
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    getBytes in class ByteBuf
    
    dstIndex - the first index of the destination
    
    length - the number of bytes to transfer
  - getBytes
```
public ByteBuf getBytes(int index,
                        byte[] dst,
                        int dstIndex,
                        int length)
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    getBytes in class ByteBuf
    
    dstIndex - the first index of the destination
    
    length - the number of bytes to transfer
  - readBytes
```
public ByteBuf readBytes(byte[] dst,
                         int dstIndex,
                         int length)
```
    Description copied from class: ByteBuf
    
    Transfers this buffer's data to the specified destination starting at the current readerIndex and increases the readerIndex by the number of the transferred bytes (= length).
    
    Overrides:
    
    readBytes in class AbstractByteBuf
    
    dstIndex - the first index of the destination
    
    length - the number of bytes to transfer
  - getBytes
```
public ByteBuf getBytes(int index,
                        ByteBuffer dst)
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    getBytes in class ByteBuf
  - readBytes
```
public ByteBuf readBytes(ByteBuffer dst)
```
    Description copied from class: ByteBuf
    
    Transfers this buffer's data to the specified destination starting at the current readerIndex until the destination's position reaches its limit, and increases the readerIndex by the number of the transferred bytes.
    
    Overrides:
    
    readBytes in class AbstractByteBuf
  - setByte
```
public ByteBuf setByte(int index,
                       int value)
```
    Description copied from class: ByteBuf
    
    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.
    
    Overrides:
    
    setByte in class AbstractByteBuf
  - _setByte
```
protected void _setByte(int index,
                        int value)
```
    Specified by:
    
    _setByte in class AbstractByteBuf
  - setShort
```
public ByteBuf setShort(int index,
                        int value)
```
    Description copied from class: ByteBuf
    
    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.
    
    Overrides:
    
    setShort in class AbstractByteBuf
  - _setShort
```
protected void _setShort(int index,
                         int value)
```
    Specified by:
    
    _setShort in class AbstractByteBuf
  - _setShortLE
```
protected void _setShortLE(int index,
                           int value)
```
    Specified by:
    
    _setShortLE in class AbstractByteBuf
  - setMedium
```
public ByteBuf setMedium(int index,
                         int value)
```
    Description copied from class: ByteBuf
    
    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.
    
    Overrides:
    
    setMedium in class AbstractByteBuf
  - _setMedium
```
protected void _setMedium(int index,
                          int value)
```
    Specified by:
    
    _setMedium in class AbstractByteBuf
  - _setMediumLE
```
protected void _setMediumLE(int index,
                            int value)
```
    Specified by:
    
    _setMediumLE in class AbstractByteBuf
  - setInt
```
public ByteBuf setInt(int index,
                      int value)
```
    Description copied from class: ByteBuf
    
    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.
    
    Overrides:
    
    setInt in class AbstractByteBuf
  - _setInt
```
protected void _setInt(int index,
                       int value)
```
    Specified by:
    
    _setInt in class AbstractByteBuf
  - _setIntLE
```
protected void _setIntLE(int index,
                         int value)
```
    Specified by:
    
    _setIntLE in class AbstractByteBuf
  - setLong
```
public ByteBuf setLong(int index,
                       long value)
```
    Description copied from class: ByteBuf
    
    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.
    
    Overrides:
    
    setLong in class AbstractByteBuf
  - _setLong
```
protected void _setLong(int index,
                        long value)
```
    Specified by:
    
    _setLong in class AbstractByteBuf
  - _setLongLE
```
protected void _setLongLE(int index,
                          long value)
```
    Specified by:
    
    _setLongLE in class AbstractByteBuf
  - setBytes
```
public ByteBuf setBytes(int index,
                        ByteBuf src,
                        int srcIndex,
                        int length)
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    setBytes in class ByteBuf
    
    srcIndex - the first index of the source
    
    length - the number of bytes to transfer
  - setBytes
```
public ByteBuf setBytes(int index,
                        byte[] src,
                        int srcIndex,
                        int length)
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    setBytes in class ByteBuf
  - setBytes
```
public ByteBuf setBytes(int index,
                        ByteBuffer src)
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    setBytes in class ByteBuf
  - getBytes
```
public ByteBuf getBytes(int index,
                        OutputStream out,
                        int length)
                 throws IOException
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    getBytes in class ByteBuf
    
    length - the number of bytes to transfer
    
    Throws:
    
    IOException - if the specified stream threw an exception during I/O
  - readBytes
```
public ByteBuf readBytes(OutputStream out,
                         int length)
                  throws IOException
```
    Description copied from class: ByteBuf
    
    Transfers this buffer's data to the specified stream starting at the current readerIndex.
    
    Overrides:
    
    readBytes in class AbstractByteBuf
    
    length - the number of bytes to transfer
    
    Throws:
    
    IOException - if the specified stream threw an exception during I/O
  - getBytes
```
public int getBytes(int index,
                    GatheringByteChannel out,
                    int length)
             throws IOException
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    getBytes in class ByteBuf
    
    length - the maximum number of bytes to transfer
    
    Returns:
    
    the actual number of bytes written out to the specified channel
    
    Throws:
    
    IOException - if the specified channel threw an exception during I/O
  - getBytes
```
public int getBytes(int index,
                    FileChannel out,
                    long position,
                    int length)
             throws IOException
```
    Description copied from class: ByteBuf
    
    Transfers this buffer's data starting at the specified absolute index to the specified channel starting at the given file position. This method does not modify readerIndex or writerIndex of this buffer. This method does not modify the channel's position.
    
    Specified by:
    
    getBytes in class ByteBuf
    
    position - the file position at which the transfer is to begin
    
    length - the maximum number of bytes to transfer
    
    Returns:
    
    the actual number of bytes written out to the specified channel
    
    Throws:
    
    IOException - if the specified channel threw an exception during I/O
  - readBytes
```
public int readBytes(GatheringByteChannel out,
                     int length)
              throws IOException
```
    Description copied from class: ByteBuf
    
    Transfers this buffer's data to the specified stream starting at the current readerIndex.
    
    Overrides:
    
    readBytes in class AbstractByteBuf
    
    length - the maximum number of bytes to transfer
    
    Returns:
    
    the actual number of bytes written out to the specified channel
    
    Throws:
    
    IOException - if the specified channel threw an exception during I/O
  - readBytes
```
public int readBytes(FileChannel out,
                     long position,
                     int length)
              throws IOException
```
    Description copied from class: ByteBuf
    
    Transfers this buffer's data starting at the current readerIndex to the specified channel starting at the given file position. This method does not modify the channel's position.
    
    Overrides:
    
    readBytes in class AbstractByteBuf
    
    position - the file position at which the transfer is to begin
    
    length - the maximum number of bytes to transfer
    
    Returns:
    
    the actual number of bytes written out to the specified channel
    
    Throws:
    
    IOException - if the specified channel threw an exception during I/O
  - setBytes
```
public int setBytes(int index,
                    InputStream in,
                    int length)
             throws IOException
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    setBytes in class ByteBuf
    
    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:
    
    IOException - if the specified stream threw an exception during I/O
  - setBytes
```
public int setBytes(int index,
                    ScatteringByteChannel in,
                    int length)
             throws IOException
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    setBytes in class ByteBuf
    
    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:
    
    IOException - if the specified channel threw an exception during I/O
  - setBytes
```
public int setBytes(int index,
                    FileChannel in,
                    long position,
                    int length)
             throws IOException
```
    Description copied from class: ByteBuf
    
    Transfers the content of the specified source channel starting at the given file position to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer. This method does not modify the channel's position.
    
    Specified by:
    
    setBytes in class ByteBuf
    
    position - the file position at which the transfer is to begin
    
    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:
    
    IOException - if the specified channel threw an exception during I/O
  - nioBufferCount
```
public int nioBufferCount()
```
    Description copied from class: ByteBuf
    
    Returns the maximum number of NIO ByteBuffers that consist this buffer. Note that ByteBuf.nioBuffers() or ByteBuf.nioBuffers(int, int) might return a less number of ByteBuffers.
    
    Specified by:
    
    nioBufferCount in class ByteBuf
    
    Returns:
    
    -1 if this buffer has no underlying ByteBuffer. the number of the underlying ByteBuffers if this buffer has at least one underlying ByteBuffer. Note that this method does not return 0 to avoid confusion.
    
    See Also:
    
    ByteBuf.nioBuffer(), ByteBuf.nioBuffer(int, int), ByteBuf.nioBuffers(), ByteBuf.nioBuffers(int, int)
  - nioBuffers
```
public ByteBuffer[] nioBuffers(int index,
                               int length)
```
    Description copied from class: ByteBuf
    
    Exposes this buffer's bytes as an NIO ByteBuffer's for the specified index and length The returned buffer shares the content with this buffer, while changing the position and limit of the returned NIO buffer does not affect the indexes and marks of this buffer. This method does not modify readerIndex or writerIndex of this buffer. Please note that the returned NIO buffer will not see the changes of this buffer if this buffer is a dynamic buffer and it adjusted its capacity.
    
    Specified by:
    
    nioBuffers in class ByteBuf
    
    See Also:
    
    ByteBuf.nioBufferCount(), ByteBuf.nioBuffer(), ByteBuf.nioBuffer(int, int)
  - copy
```
public ByteBuf copy(int index,
                    int length)
```
    Description copied from class: ByteBuf
    
    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.
    
    Specified by:
    
    copy in class ByteBuf
  - internalNioBuffer
```
public ByteBuffer internalNioBuffer(int index,
                                    int length)
```
    Description copied from class: ByteBuf
    
    Internal use only: Exposes the internal NIO buffer.
    
    Specified by:
    
    internalNioBuffer in class ByteBuf
  - nioBuffer
```
public ByteBuffer nioBuffer(int index,
                            int length)
```
    Description copied from class: ByteBuf
    
    Exposes this buffer's sub-region as an NIO ByteBuffer. The returned buffer shares the content with this buffer, while changing the position and limit of the returned NIO buffer does not affect the indexes and marks of this buffer. This method does not modify readerIndex or writerIndex of this buffer. Please note that the returned NIO buffer will not see the changes of this buffer if this buffer is a dynamic buffer and it adjusted its capacity.
    
    Specified by:
    
    nioBuffer in class ByteBuf
    
    See Also:
    
    ByteBuf.nioBufferCount(), ByteBuf.nioBuffers(), ByteBuf.nioBuffers(int, int)
  - deallocate
```
protected void deallocate()
```
    Description copied from class: AbstractReferenceCountedByteBuf
    
    Called once AbstractReferenceCountedByteBuf.refCnt() is equals 0.
    
    Specified by:
    
    deallocate in class AbstractReferenceCountedByteBuf
  - unwrap
```
public ByteBuf unwrap()
```
    Description copied from class: ByteBuf
    
    Return the underlying buffer instance if this buffer is a wrapper of another buffer.
    
    Specified by:
    
    unwrap in class ByteBuf
    
    Returns:
    
    null if this buffer is not a wrapper

Class UnpooledDirectByteBuf

Constructor Summary

Method Summary

Methods inherited from class io.netty.buffer.AbstractReferenceCountedByteBuf

Methods inherited from class io.netty.buffer.AbstractByteBuf

Methods inherited from class java.lang.Object

Constructor Detail

UnpooledDirectByteBuf

UnpooledDirectByteBuf

Method Detail

allocateDirect

freeDirect

isDirect

capacity

capacity

alloc

order

hasArray

array

arrayOffset

hasMemoryAddress

memoryAddress

getByte

_getByte

getShort

_getShort

_getShortLE

getUnsignedMedium

_getUnsignedMedium

_getUnsignedMediumLE

getInt

_getInt

_getIntLE

getLong

_getLong

_getLongLE

getBytes

getBytes

readBytes

getBytes

readBytes

setByte

_setByte

setShort

_setShort

_setShortLE

setMedium

_setMedium

_setMediumLE

setInt

_setInt

_setIntLE

setLong

_setLong

_setLongLE

setBytes

setBytes

setBytes

getBytes

readBytes

getBytes

getBytes

readBytes

readBytes

setBytes

setBytes

setBytes

nioBufferCount

nioBuffers

copy

internalNioBuffer

nioBuffer

deallocate

unwrap