Package org.h2.mvstore.type

Class ObjectDataType.AutoDetectDataType<T>

java.lang.Object

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

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

All Implemented Interfaces:

java.util.Comparator<T>, DataType<T>

Direct Known Subclasses:

ObjectDataType.BigDecimalType, ObjectDataType.BigIntegerType, ObjectDataType.BooleanType, ObjectDataType.ByteType, ObjectDataType.CharacterType, ObjectDataType.DateType, ObjectDataType.DoubleType, ObjectDataType.FloatType, ObjectDataType.IntegerType, ObjectDataType.LongType, ObjectDataType.NullType, ObjectDataType.ObjectArrayType, ObjectDataType.SerializedObjectType, ObjectDataType.ShortType, ObjectDataType.StringType, ObjectDataType.UUIDType

Enclosing class:

ObjectDataType

abstract static class ObjectDataType.AutoDetectDataType<T>
extends BasicDataType<T>

The base class for auto-detect data types.

Field Summary

Fields

Modifier and Type	Field	Description
private ObjectDataType	base
(package private) int	typeId	The type id.

Constructor Summary

Constructors

Constructor	Description
AutoDetectDataType(int typeId)
AutoDetectDataType(ObjectDataType base, int typeId)

Method Summary

Modifier and Type	Method	Description
int	getMemory(T o)	Calculates the amount of used memory in bytes.
(package private) DataType<java.lang.Object>	getType(java.lang.Object o)	Get the type for the given object.
(package private) abstract java.lang.Object	read(java.nio.ByteBuffer buff, int tag)	Read an object from the buffer.
void	write(WriteBuffer buff, T o)	Write an object.

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

binarySearch, cast, compare, equals, hashCode, isMemoryEstimationAllowed, read, 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

Methods inherited from interface org.h2.mvstore.type.DataType

createStorage

Field Detail

base

private final ObjectDataType base

typeId

final int typeId

The type id.

Constructor Detail

AutoDetectDataType

AutoDetectDataType(int typeId)

AutoDetectDataType

AutoDetectDataType(ObjectDataType base,
                   int typeId)

Method Detail

getMemory

public int getMemory(T o)

Description copied from interface: DataType

Calculates the amount of used memory in bytes.

Specified by:

getMemory in interface DataType<T>

Specified by:

getMemory in class BasicDataType<T>

Parameters:

o - the object

Returns:

the used memory

write

public void write(WriteBuffer buff,
                  T o)

Description copied from interface: DataType

Write an object.

Specified by:

write in interface DataType<T>

Specified by:

write in class BasicDataType<T>

Parameters:

buff - the target buffer

o - the value

getType

DataType<java.lang.Object> getType(java.lang.Object o)

Get the type for the given object.

Parameters:

o - the object

Returns:

the type

read

abstract java.lang.Object read(java.nio.ByteBuffer buff,
                               int tag)

Read an object from the buffer.

Parameters:

buff - the buffer

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

Returns:

the read object