Package org.h2.mvstore.type

Class ObjectDataType.IntegerType

java.lang.Object

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

org.h2.mvstore.type.ObjectDataType.AutoDetectDataType<Integer>

org.h2.mvstore.type.ObjectDataType.IntegerType

All Implemented Interfaces:

Comparator<Integer>, DataType<Integer>

Enclosing class:

ObjectDataType

static class ObjectDataType.IntegerType
extends ObjectDataType.AutoDetectDataType<Integer>

The type for integer objects.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final ObjectDataType.IntegerType	INSTANCE	The only instance of this type.

Fields inherited from class org.h2.mvstore.type.ObjectDataType.AutoDetectDataType

typeId

Constructor Summary

Constructors

Modifier	Constructor	Description
private	IntegerType()

Method Summary

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

Methods inherited from class org.h2.mvstore.type.ObjectDataType.AutoDetectDataType

getType

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

static final ObjectDataType.IntegerType INSTANCE

The only instance of this type.

Constructor Details

IntegerType

private IntegerType()

Method Details

createStorage

public Integer[] 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(Integer a,
 Integer b)

Description copied from interface: DataType

Compare two keys.

Specified by:

compare in interface Comparator<Integer>

Specified by:

compare in interface DataType<Integer>

Overrides:

compare in class BasicDataType<Integer>

Parameters:

a - the first key

b - the second key

Returns:

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

getMemory

public int getMemory(Integer obj)

Description copied from interface: DataType

Calculates the amount of used memory in bytes.

Specified by:

getMemory in interface DataType<Integer>

Overrides:

getMemory in class ObjectDataType.AutoDetectDataType<Integer>

Parameters:

obj - the object

Returns:

the used memory

write

public void write(WriteBuffer buff,
 Integer obj)

Description copied from interface: DataType

Write an object.

Specified by:

write in interface DataType<Integer>

Overrides:

write in class ObjectDataType.AutoDetectDataType<Integer>

Parameters:

buff - the target buffer

obj - the value

read

public Integer read(ByteBuffer buff)

Description copied from interface: DataType

Read an object.

Specified by:

read in interface DataType<Integer>

Specified by:

read in class BasicDataType<Integer>

Parameters:

buff - the source buffer

Returns:

the object

read

public Integer read(ByteBuffer buff,
 int tag)

Description copied from class: ObjectDataType.AutoDetectDataType

Read an object from the buffer.

Specified by:

read in class ObjectDataType.AutoDetectDataType<Integer>

Parameters:

buff - the buffer

tag - the first byte of the object (usually the type)

Returns:

the read object