ByteBufferVol

Volume
- org.mapdb.volume.ByteBufferVol

Direct Known Subclasses:

ByteBufferMemoryVol, MappedFileVol
```
public class ByteBufferVol
extends Volume
```
Abstract Volume over bunch of ByteBuffers It leaves ByteBufferVol details (allocation, disposal) on subclasses. Most methods are final for better performance (JIT compiler can inline those).

Field Summary

Fields
Modifier and Type	Field and Description
`boolean`	`cleanerHackEnabled`
`java.util.concurrent.locks.ReentrantLock`	`growLock`
`boolean`	`readOnly`
`int`	`sliceShift`
`int`	`sliceSize`
`int`	`sliceSizeModMask`
`java.nio.ByteBuffer[]`	`slices`

Fields inherited from class org.mapdb.volume.Volume
LOG, UNSAFE_VOL_FACTORY, closed

Constructor Summary

Constructors
Constructor and Description

ByteBufferVol()

Constructors
Constructor and Description
`ByteBufferVol()`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`clear()`
`void`	`copyTo()`
`byte`	`getByte()`
`void`	`getData()`
`DataInput2.ByteBuffer`	`getDataInput()`
`DataInput2`	`getDataInputOverlap()`
`int`	`getInt()`
`long`	`getLong()`
`long`	`getPackedLong()`
`long`	`getSixLong()`
`java.nio.ByteBuffer`	`getSlice()`
`int`	`getUnsignedByte()`
`int`	`getUnsignedShort()`
`boolean`	`isSliced()`
`void`	`putByte()`
`void`	`putData()`
`void`	`putData()`
`void`	`putDataOverlap()`
`void`	`putInt()`
`void`	`putLong()`
`int`	`putPackedLong()`
`void`	`putSixLong()`
`void`	`putUnsignedByte()`
`void`	`putUnsignedShort()`
`int`	`sliceSize()`
`static byte`	`toByte()`
`static byte`	`toByte()`
`static boolean`	`unmap()` Hack to unmap MappedByteBuffer. Unmap is necessary on Windows, otherwise file is locked until JVM exits or BB is GCed. There is no public JVM API to unmap buffer, so this tries to use SUN proprietary API for unmap. Any error is silently ignored (for example SUN API does not exist on Android).

Methods inherited from class org.mapdb.volume.Volume
assertZeroes, clear, clearOverlap, close, copyFrom, copyTo, copyTo, copyTo, deleteFile, ensureAvailable, fileLoad, finalize, getByte, getData, getDataInput, getDataInputOverlap, getFile, getFileLocked, getInt, getLong, getPackedLong, getSixLong, getUnsignedByte, getUnsignedShort, hash, isClosed, isReadOnly, isSliced, length, putByte, putData, putData, putDataOverlap, putInt, putLong, putPackedLong, putSixLong, putUnsignedByte, putUnsignedShort, sliceSize, sync, truncate

Field Detail

cleanerHackEnabled
```
public boolean cleanerHackEnabled
```

growLock

public java.util.concurrent.locks.ReentrantLock growLock

sliceShift
```
public int sliceShift
```

sliceSizeModMask
```
public int sliceSizeModMask
```

sliceSize
```
public int sliceSize
```

slices
```
public java.nio.ByteBuffer[] slices
```

readOnly
```
public boolean readOnly
```

Constructor Detail
- ByteBufferVol
```
public ByteBufferVol()
```

Method Detail

getSlice
```
public java.nio.ByteBuffer getSlice()
```

putLong
```
public void putLong()
```

putInt
```
public void putInt()
```

putByte
```
public void putByte()
```

putData
```
public void putData()
```

putData
```
public void putData()
```

copyTo
```
public void copyTo()
```

getData
```
public void getData()
```

getLong
```
public long getLong()
```

getInt
```
public int getInt()
```

getByte
```
public byte getByte()
```

getDataInput

public DataInput2.ByteBuffer getDataInput()

putDataOverlap
```
public void putDataOverlap()
```

getDataInputOverlap

public DataInput2 getDataInputOverlap()

putUnsignedShort
```
public void putUnsignedShort()
```

getUnsignedShort
```
public int getUnsignedShort()
```

getUnsignedByte
```
public int getUnsignedByte()
```

putUnsignedByte
```
public void putUnsignedByte()
```

toByte
```
public static byte toByte()
```

toByte
```
public static byte toByte()
```

getSixLong
```
public long getSixLong()
```

putSixLong
```
public void putSixLong()
```

putPackedLong
```
public int putPackedLong()
```

getPackedLong
```
public long getPackedLong()
```

clear
```
public void clear()
```

isSliced
```
public boolean isSliced()
```

sliceSize
```
public int sliceSize()
```

unmap
```
public static boolean unmap()
```
Hack to unmap MappedByteBuffer. Unmap is necessary on Windows, otherwise file is locked until JVM exits or BB is GCed. There is no public JVM API to unmap buffer, so this tries to use SUN proprietary API for unmap. Any error is silently ignored (for example SUN API does not exist on Android).

Class ByteBufferVol

Field Summary

Fields inherited from class org.mapdb.volume.Volume

Constructor Summary

Method Summary

Methods inherited from class org.mapdb.volume.Volume

Field Detail

cleanerHackEnabled

growLock

sliceShift

sliceSizeModMask

sliceSize

slices

readOnly

Constructor Detail

ByteBufferVol

Method Detail

getSlice

putLong

putInt

putByte

putData

putData

copyTo

getData

getLong

getInt

getByte

getDataInput

putDataOverlap

getDataInputOverlap

putUnsignedShort

getUnsignedShort

getUnsignedByte

putUnsignedByte

toByte

toByte

getSixLong

putSixLong

putPackedLong

getPackedLong

clear

isSliced

sliceSize

unmap