BufferChannelMem (Apache Jena - DBOE Base 3.12.0)

java.lang.Object
- org.apache.jena.dboe.base.file.BufferChannelMem

All Implemented Interfaces:

org.apache.jena.atlas.lib.Closeable, org.apache.jena.atlas.lib.Sync, BufferChannel
```
public class BufferChannelMem
extends Object
implements BufferChannel
```

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`close()`
`static BufferChannel`	`create()`
`static BufferChannel`	`create(String name)`
`BufferChannel`	`duplicate()` Return another channel to the same storage but with independent position.
`String`	`getFilename()` Filename for this BufferChannel (maybe null)
`String`	`getLabel()` useful display string
`boolean`	`isEmpty()` Is it empty?
`long`	`position()` return the position
`void`	`position(long pos)` set the position
`int`	`read(ByteBuffer buffer)` Read into a ByteBuffer.
`int`	`read(ByteBuffer buffer, long loc)` Read into a ByteBuffer, starting at position loc.
`long`	`size()` Length of storage, in bytes.
`void`	`sync()`
`String`	`toString()`
`void`	`truncate(long size)` Truncate the file.
`int`	`write(ByteBuffer buffer)` Write from ByteBuffer, starting at the current position.
`int`	`write(ByteBuffer buffer, long loc)` Write from ByteBuffer, starting at position loc.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - create
```
public static BufferChannel create()
```
  - create
```
public static BufferChannel create(String name)
```
  - duplicate
```
public BufferChannel duplicate()
```
    Description copied from interface: BufferChannel
    
    Return another channel to the same storage but with independent position. Chaos may result due to concurrent use.
    
    Specified by:
    
    duplicate in interface BufferChannel
  - position
```
public long position()
```
    Description copied from interface: BufferChannel
    
    return the position
    
    Specified by:
    
    position in interface BufferChannel
  - position
```
public void position(long pos)
```
    Description copied from interface: BufferChannel
    
    set the position
    
    Specified by:
    
    position in interface BufferChannel
  - read
```
public int read(ByteBuffer buffer)
```
    Description copied from interface: BufferChannel
    
    Read into a ByteBuffer. Returns the number of bytes read. -1 for end of file.
    
    Specified by:
    
    read in interface BufferChannel
  - read
```
public int read(ByteBuffer buffer,
                long loc)
```
    Description copied from interface: BufferChannel
    
    Read into a ByteBuffer, starting at position loc. Return the number of bytes read. loc must be within the file.
    
    Specified by:
    
    read in interface BufferChannel
  - write
```
public int write(ByteBuffer buffer)
```
    Description copied from interface: BufferChannel
    
    Write from ByteBuffer, starting at the current position. Return the number of bytes written
    
    Specified by:
    
    write in interface BufferChannel
  - write
```
public int write(ByteBuffer buffer,
                 long loc)
```
    Description copied from interface: BufferChannel
    
    Write from ByteBuffer, starting at position loc. Return the number of bytes written. loc must be within 0 to length - writing at length is append
    
    Specified by:
    
    write in interface BufferChannel
  - truncate
```
public void truncate(long size)
```
    Description copied from interface: BufferChannel
    
    Truncate the file.
    
    Specified by:
    
    truncate in interface BufferChannel
    
    See Also:
    
    FileChannel.truncate(long)
  - size
```
public long size()
```
    Description copied from interface: BufferChannel
    
    Length of storage, in bytes.
    
    Specified by:
    
    size in interface BufferChannel
  - isEmpty
```
public boolean isEmpty()
```
    Description copied from interface: BufferChannel
    
    Is it empty?
    
    Specified by:
    
    isEmpty in interface BufferChannel
  - sync
```
public void sync()
```
    Specified by:
    
    sync in interface org.apache.jena.atlas.lib.Sync
  - close
```
public void close()
```
    Specified by:
    
    close in interface org.apache.jena.atlas.lib.Closeable
  - getLabel
```
public String getLabel()
```
    Description copied from interface: BufferChannel
    
    useful display string
    
    Specified by:
    
    getLabel in interface BufferChannel
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - getFilename
```
public String getFilename()
```
    Description copied from interface: BufferChannel
    
    Filename for this BufferChannel (maybe null)
    
    Specified by:
    
    getFilename in interface BufferChannel

Class BufferChannelMem

Method Summary

Methods inherited from class java.lang.Object

Method Detail

create

create

duplicate

position

position

read

read

write

write

truncate

size

isEmpty

sync

close

getLabel

toString

getFilename