Package org.h2.mvstore.type

Class IntegerDataType

java.lang.Object

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

org.h2.mvstore.type.IntegerDataType

All Implemented Interfaces:

Comparator<Integer>, DataType<Integer>

public class IntegerDataType
extends BasicDataType<Integer>

Class IntegerDataType.

• 4/10/24 1:18 PM initial creation

Field Summary

Fields

Modifier and Type	Field	Description
static final IntegerDataType	INSTANCE

Method Summary

Modifier and Type	Method	Description
int	binarySearch(Integer keyObj, Object storageObj, int size, int initialGuess)	Perform binary search for the key within the storage
int	compare(Integer one, Integer two)	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.
void	write(WriteBuffer buff, Integer data)	Write an object.

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

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 IntegerDataType INSTANCE

Method Details

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>

Specified by:

getMemory in class BasicDataType<Integer>

Parameters:

obj - the object

Returns:

the used memory

write

public void write(WriteBuffer buff,
 Integer data)

Description copied from interface: DataType

Write an object.

Specified by:

write in interface DataType<Integer>

Specified by:

write in class BasicDataType<Integer>

Parameters:

buff - the target buffer

data - 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

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 one,
 Integer two)

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:

one - the first key

two - the second key

Returns:

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

binarySearch

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

Description copied from interface: DataType

Perform binary search for the key within the storage

Specified by:

binarySearch in interface DataType<Integer>

Overrides:

binarySearch in class BasicDataType<Integer>

Parameters:

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

Returns:

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