Package org.h2.mvstore.tx

Class Record.Type<K,V>

java.lang.Object

org.h2.mvstore.type.BasicDataType<Record<K,V>>

org.h2.mvstore.tx.Record.Type<K,V>

All Implemented Interfaces:

java.util.Comparator<Record<K,V>>, DataType<Record<K,V>>

Enclosing class:

Record<K,V>

static final class Record.Type<K,V>
extends BasicDataType<Record<K,V>>

A data type for undo log values

Field Summary

Fields

Modifier and Type	Field	Description
private TransactionStore	transactionStore

Constructor Summary

Constructors

Constructor	Description
Type(TransactionStore transactionStore)

Method Summary

Modifier and Type	Method	Description
int	compare(Record<K,V> aObj, Record<K,V> bObj)	Compare two keys.
Record<K,V>[]	createStorage(int size)	Create storage object of array type to hold values
int	getMemory(Record<K,V> record)	Calculates the amount of used memory in bytes.
Record<K,V>	read(java.nio.ByteBuffer buff)	Read an object.
void	write(WriteBuffer buff, Record<K,V> record)	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 Detail

transactionStore

private final TransactionStore transactionStore

Constructor Detail

Type

Type(TransactionStore transactionStore)

Method Detail

getMemory

public int getMemory(Record<K,V> record)

Description copied from interface: DataType

Calculates the amount of used memory in bytes.

Specified by:

getMemory in interface DataType<K>

Specified by:

getMemory in class BasicDataType<Record<K,V>>

Parameters:

record - the object

Returns:

the used memory

compare

public int compare(Record<K,V> aObj,
                   Record<K,V> bObj)

Description copied from interface: DataType

Compare two keys.

Specified by:

compare in interface java.util.Comparator<K>

Specified by:

compare in interface DataType<K>

Overrides:

compare in class BasicDataType<Record<K,V>>

Parameters:

aObj - the first key

bObj - the second key

Returns:

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

write

public void write(WriteBuffer buff,
                  Record<K,V> record)

Description copied from interface: DataType

Write an object.

Specified by:

write in interface DataType<K>

Specified by:

write in class BasicDataType<Record<K,V>>

Parameters:

buff - the target buffer

record - the value

read

public Record<K,V> read(java.nio.ByteBuffer buff)

Description copied from interface: DataType

Read an object.

Specified by:

read in interface DataType<K>

Specified by:

read in class BasicDataType<Record<K,V>>

Parameters:

buff - the source buffer

Returns:

the object

createStorage

public Record<K,V>[] 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