All Superinterfaces:

java.lang.AutoCloseable, java.nio.channels.ByteChannel, java.nio.channels.Channel, java.io.Closeable, java.io.Externalizable, Item, java.nio.channels.ReadableByteChannel, java.nio.channels.SeekableByteChannel, java.io.Serializable, java.nio.channels.WritableByteChannel

All Known Implementing Classes:

DataItemImpl
```
public interface DataItem
extends Item, java.nio.channels.SeekableByteChannel
```
Created by kurila on 11.07.16.

Field Summary

Fields
Modifier and Type Field Description

static double LOG2

Method Summary

All Methods Static Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`commitUpdatedRanges(java.util.BitSet[] updatingRangesMask)`
`DataInput`	`dataInput()`
`void`	`dataInput(DataInput dataInput)`
`boolean`	`isRangeUpdated(int rangeIdx)`
`boolean`	`isUpdated()`
`int`	`layer()`
`void`	`layer(int layerNum)`
`long`	`offset()`
`void`	`offset(long offset)`
`long`	`position()`
`DataItem`	`position(long position)`
`static int`	`rangeCount(long size)`
`static long`	`rangeOffset(int i)`
`long`	`rangeSize(int rangeIdx)`
`void`	`reset()`
`void`	`size(long size)`
`<D extends DataItem> D`	`slice(long from, long size)`
`int`	`updatedRangesCount()`
`void`	`verify(java.nio.ByteBuffer inBuff)`
`<A> void`	`writeToAsyncChannel(AsyncChannel dstChan, long dstPos, long maxCount, A attach, java.nio.channels.CompletionHandler<java.lang.Integer,? super A> handler)`	Warning: the data item's position should be updated by the handler
`long`	`writeToFileChannel(java.nio.channels.FileChannel chanDst, long maxCount)`
`long`	`writeToSocketChannel(java.nio.channels.WritableByteChannel chanDst, long maxCount)`

Methods inherited from interface java.nio.channels.Channel
close, isOpen

Methods inherited from interface java.io.Externalizable
readExternal, writeExternal

Methods inherited from interface com.emc.mongoose.base.item.Item
name, name, toString

Methods inherited from interface java.nio.channels.SeekableByteChannel
read, size, truncate, write

- Field Detail
  - LOG2
```
static final double LOG2
```
- Method Detail
  - dataInput
```
DataInput dataInput()
```
  - dataInput
```
void dataInput(DataInput dataInput)
```
  - reset
```
void reset()
```
    Specified by:
    
    reset in interface Item
  - layer
```
int layer()
```
  - layer
```
void layer(int layerNum)
```
  - size
```
void size(long size)
```
  - offset
```
long offset()
```
  - offset
```
void offset(long offset)
```
  - position
```
long position()
```
    Specified by:
    
    position in interface java.nio.channels.SeekableByteChannel
  - position
```
DataItem position(long position)
```
    Specified by:
    
    position in interface java.nio.channels.SeekableByteChannel
  - slice
```
<D extends DataItem> D slice(long from,
                             long size)
```
  - writeToSocketChannel
```
long writeToSocketChannel(java.nio.channels.WritableByteChannel chanDst,
                          long maxCount)
                   throws java.io.IOException
```
    Returns:
    
    The number of bytes written, possibly zero
    
    Throws:
    
    java.nio.channels.NonWritableChannelException - If this channel was not opened for writing
    
    java.nio.channels.ClosedChannelException - If this channel is closed
    
    java.nio.channels.AsynchronousCloseException - If another thread closes this channel while the write operation is in progress
    
    java.nio.channels.ClosedByInterruptException - If another thread interrupts the current thread while the write operation is in progress, thereby closing the channel and setting the current thread's interrupt status
    
    java.io.IOException - If some other I/O error occurs
  - writeToFileChannel
```
long writeToFileChannel(java.nio.channels.FileChannel chanDst,
                        long maxCount)
                 throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - writeToAsyncChannel
```
<A> void writeToAsyncChannel(AsyncChannel dstChan,
                             long dstPos,
                             long maxCount,
                             A attach,
                             java.nio.channels.CompletionHandler<java.lang.Integer,? super A> handler)
```
    Warning: the data item's position should be updated by the handler
    
    Type Parameters:
    
    A -
    
    Parameters:
    
    dstChan -
    
    dstPos -
    
    maxCount -
    
    attach -
    
    handler - note that the handler should invoke {@link DataItem#position(long))} to set the new position for this
  - verify
```
void verify(java.nio.ByteBuffer inBuff)
     throws DataCorruptionException
```
    Throws:
    
    DataCorruptionException
  - rangeCount
```
static int rangeCount(long size)
```
  - rangeOffset
```
static long rangeOffset(int i)
```
  - rangeSize
```
long rangeSize(int rangeIdx)
```
  - isUpdated
```
boolean isUpdated()
```
  - isRangeUpdated
```
boolean isRangeUpdated(int rangeIdx)
```
  - updatedRangesCount
```
int updatedRangesCount()
```
  - commitUpdatedRanges
```
void commitUpdatedRanges(java.util.BitSet[] updatingRangesMask)
```

Interface DataItem

Field Summary

Method Summary

Methods inherited from interface java.nio.channels.Channel

Methods inherited from interface java.io.Externalizable

Methods inherited from interface com.emc.mongoose.base.item.Item

Methods inherited from interface java.nio.channels.SeekableByteChannel

Field Detail

LOG2

Method Detail

dataInput

dataInput

reset

layer

layer

size

offset

offset

position

position

slice

writeToSocketChannel

writeToFileChannel

writeToAsyncChannel

verify

rangeCount

rangeOffset

rangeSize

isUpdated

isRangeUpdated

updatedRangesCount

commitUpdatedRanges