org.h2.mvstore.type

类 LongDataType

java.lang.Object

org.h2.mvstore.type.BasicDataType<Long>

org.h2.mvstore.type.LongDataType

所有已实现的接口:

Comparator<Long>, DataType<Long>

public class LongDataType
extends BasicDataType<Long>

Class LongDataType.

• 8/21/17 6:52 PM initial creation

作者:

Andrei Tokar

字段概要

字段

限定符和类型	字段和说明
static LongDataType	INSTANCE

方法概要

限定符和类型	方法和说明
int	binarySearch(Long keyObj, Object storageObj, int size, int initialGuess) Perform binary search for the key within the storage
int	compare(Long one, Long two) Compare two keys.
Long[]	createStorage(int size) Create storage object of array type to hold values
int	getMemory(Long obj) Calculates the amount of used memory in bytes.
Long	read(ByteBuffer buff) Read an object.
void	write(WriteBuffer buff, Long data) Write an object.

从类继承的方法 org.h2.mvstore.type.BasicDataType

cast, equals, hashCode, isMemoryEstimationAllowed, read, write

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

字段详细资料

INSTANCE

public static final LongDataType INSTANCE

方法详细资料

getMemory

public int getMemory(Long obj)

从接口复制的说明: DataType

Calculates the amount of used memory in bytes.

指定者:

getMemory 在接口中 DataType<Long>

指定者:

getMemory 在类中 BasicDataType<Long>

参数:

obj - the object

返回:

the used memory

write

public void write(WriteBuffer buff,
                  Long data)

从接口复制的说明: DataType

Write an object.

指定者:

write 在接口中 DataType<Long>

指定者:

write 在类中 BasicDataType<Long>

参数:

buff - the target buffer

data - the value

read

public Long read(ByteBuffer buff)

从接口复制的说明: DataType

Read an object.

指定者:

read 在接口中 DataType<Long>

指定者:

read 在类中 BasicDataType<Long>

参数:

buff - the source buffer

返回:

the object

createStorage

public Long[] createStorage(int size)

从接口复制的说明: DataType

Create storage object of array type to hold values

参数:

size - number of values to hold

返回:

storage object

compare

public int compare(Long one,
                   Long two)

从接口复制的说明: DataType

Compare two keys.

指定者:

compare 在接口中 Comparator<Long>

指定者:

compare 在接口中 DataType<Long>

覆盖:

compare 在类中 BasicDataType<Long>

参数:

one - the first key

two - the second key

返回:

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

binarySearch

public int binarySearch(Long keyObj,
                        Object storageObj,
                        int size,
                        int initialGuess)

从接口复制的说明: DataType

Perform binary search for the key within the storage

指定者:

binarySearch 在接口中 DataType<Long>

覆盖:

binarySearch 在类中 BasicDataType<Long>

参数:

keyObj - to search for

storageObj - to search within (an array of type T)

size - number of data items in the storage

initialGuess - for key position

返回:

index of the key , if found, - index of the insertion point, if not