org.h2.mvstore.type
Class ObjectType.LongType

java.lang.Object
  org.h2.mvstore.type.ObjectType.LongType

All Implemented Interfaces:

DataType

Enclosing class:

ObjectType

public class ObjectType.LongType
extends java.lang.Object

The type for long objects.

Field Summary

protected ObjectType	base
protected int	typeId

Method Summary

java.lang.String	asString() Get the stable string representation that is used to build this data type.
int	compare(java.lang.Object aObj, java.lang.Object bObj) Compare two keys.
int	getMaxLength(java.lang.Object obj) Get the maximum length in bytes used to store an object.
int	getMemory(java.lang.Object obj) Estimate the 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(java.nio.ByteBuffer buff, java.lang.Object obj) Write the object.

Methods inherited from class java.lang.Object

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

Field Detail

base

protected final ObjectType base

typeId

protected final int typeId

Method Detail

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 DataType

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

Estimate the used memory in bytes.

Specified by:

getMemory in interface DataType

Parameters:

obj - the object

Returns:

the used memory

getMaxLength

public int getMaxLength(java.lang.Object obj)

Description copied from interface: DataType

Get the maximum length in bytes used to store an object. In many cases, this method can be faster than calculating the exact length.

Specified by:

getMaxLength in interface DataType

Parameters:

obj - the object

Returns:

the maximum length

write

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

Description copied from interface: DataType

Write the object.

Specified by:

write in interface DataType

Parameters:

buff - the target buffer

obj - the value

read

public 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

read

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

Description copied from interface: DataType

Read an object.

Specified by:

read in interface DataType

Parameters:

buff - the source buffer

Returns:

the object

asString

public java.lang.String asString()

Description copied from interface: DataType

Get the stable string representation that is used to build this data type.

To avoid conflict with the default factory, the returned string should start with the package name of the type factory.

Specified by:

asString in interface DataType

Returns:

the string representation