Package org.h2.mvstore.type

Class ByteArrayDataType

java.lang.Object

org.h2.mvstore.type.BasicDataType<byte[]>

org.h2.mvstore.type.ByteArrayDataType

All Implemented Interfaces:

Comparator<byte[]>, DataType<byte[]>

public final class ByteArrayDataType
extends BasicDataType<byte[]>

Class ByteArrayDataType.

Field Summary

Fields

Modifier and Type	Field	Description
static final ByteArrayDataType	INSTANCE

Method Summary

Modifier and Type	Method	Description
int	compare(byte[] one, byte[] two)	Compare two keys.
byte[][]	createStorage(int size)	Create storage object of array type to hold values
int	getMemory(byte[] data)	Calculates the amount of used memory in bytes.
byte[]	read(ByteBuffer buff)	Read an object.
void	write(WriteBuffer buff, byte[] data)	Write an object.

Methods inherited from class org.h2.mvstore.type.BasicDataType

binarySearch, cast, equals, hashCode, isMemoryEstimationAllowed, read, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Details

INSTANCE

public static final ByteArrayDataType INSTANCE

Method Details

getMemory

public int getMemory(byte[] data)

Description copied from interface: DataType

Calculates the amount of used memory in bytes.

Specified by:

getMemory in interface DataType<byte[]>

Specified by:

getMemory in class BasicDataType<byte[]>

Parameters:

data - the object

Returns:

the used memory

write

public void write(WriteBuffer buff,
 byte[] data)

Description copied from interface: DataType

Write an object.

Specified by:

write in interface DataType<byte[]>

Specified by:

write in class BasicDataType<byte[]>

Parameters:

buff - the target buffer

data - the value

read

public byte[] read(ByteBuffer buff)

Description copied from interface: DataType

Read an object.

Specified by:

read in interface DataType<byte[]>

Specified by:

read in class BasicDataType<byte[]>

Parameters:

buff - the source buffer

Returns:

the object

createStorage

public byte[][] createStorage(int size)

Description copied from interface: DataType

Create storage object of array type to hold values

Parameters:

size - number of values to hold

Returns:

storage object

compare

public int compare(byte[] one,
 byte[] two)

Description copied from interface: DataType

Compare two keys.

Specified by:

compare in interface Comparator<byte[]>

Specified by:

compare in interface DataType<byte[]>

Overrides:

compare in class BasicDataType<byte[]>

Parameters:

one - the first key

two - the second key

Returns:

-1 if the first key is smaller, 1 if larger, and 0 if equal