Package org.h2.mvstore.type

Class ObjectDataType.SerializedObjectType

java.lang.Object

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

org.h2.mvstore.type.ObjectDataType.AutoDetectDataType<java.lang.Object>

org.h2.mvstore.type.ObjectDataType.SerializedObjectType

All Implemented Interfaces:

java.util.Comparator<java.lang.Object>, DataType<java.lang.Object>

Enclosing class:

ObjectDataType

static class ObjectDataType.SerializedObjectType
extends ObjectDataType.AutoDetectDataType<java.lang.Object>

The type for serialized objects.

Field Summary

Fields

Modifier and Type	Field	Description
private int	averageSize

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

typeId

Constructor Summary

Constructors

Constructor	Description
SerializedObjectType(ObjectDataType base)

Method Summary

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

averageSize

private int averageSize

Constructor Detail

SerializedObjectType

SerializedObjectType(ObjectDataType base)

Method Detail

createStorage

public java.lang.Object[] 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(java.lang.Object aObj,
                   java.lang.Object bObj)

Description copied from interface: DataType

Compare two keys.

Specified by:

compare in interface java.util.Comparator<java.lang.Object>

Specified by:

compare in interface DataType<java.lang.Object>

Overrides:

compare in class BasicDataType<java.lang.Object>

Parameters:

aObj - the first key

bObj - the second key

Returns:

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

getMemory

public int getMemory(java.lang.Object obj)

Description copied from interface: DataType

Calculates the amount of used memory in bytes.

Specified by:

getMemory in interface DataType<java.lang.Object>

Overrides:

getMemory in class ObjectDataType.AutoDetectDataType<java.lang.Object>

Parameters:

obj - the object

Returns:

the used memory

write

public void write(WriteBuffer buff,
                  java.lang.Object obj)

Description copied from interface: DataType

Write an object.

Specified by:

write in interface DataType<java.lang.Object>

Overrides:

write in class ObjectDataType.AutoDetectDataType<java.lang.Object>

Parameters:

buff - the target buffer

obj - the value

read

public java.lang.Object read(java.nio.ByteBuffer buff)

Description copied from interface: DataType

Read an object.

Specified by:

read in interface DataType<java.lang.Object>

Specified by:

read in class BasicDataType<java.lang.Object>

Parameters:

buff - the source buffer

Returns:

the object

read

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

Description copied from class: ObjectDataType.AutoDetectDataType

Read an object from the buffer.

Specified by:

read in class ObjectDataType.AutoDetectDataType<java.lang.Object>

Parameters:

buff - the buffer

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

Returns:

the read object