org.h2.mvstore.db

Class ValueDataType

java.lang.Object

org.h2.mvstore.db.ValueDataType

All Implemented Interfaces:

DataType

public class ValueDataType
extends java.lang.Object
implements DataType

A row type.

Constructor Summary

Constructors

Constructor and Description
ValueDataType(CompareMode compareMode, DataHandler handler, int[] sortTypes)

Method Summary

Modifier and Type	Method and Description
int	compare(java.lang.Object a, java.lang.Object b) Compare two keys.
boolean	equals(java.lang.Object obj)
int	getMemory(java.lang.Object obj) Estimate the used memory in bytes.
int	hashCode()
java.lang.Object	read(java.nio.ByteBuffer buff) Read an object.
void	read(java.nio.ByteBuffer buff, java.lang.Object[] obj, int len, boolean key) Read a list of objects.
void	write(WriteBuffer buff, java.lang.Object obj) Write an object.
void	write(WriteBuffer buff, java.lang.Object[] obj, int len, boolean key) Write a list of objects.

Methods inherited from class java.lang.Object

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

Constructor Detail

ValueDataType

public ValueDataType(CompareMode compareMode,
                     DataHandler handler,
                     int[] sortTypes)

Method Detail

compare

public int compare(java.lang.Object a,
                   java.lang.Object b)

Description copied from interface: DataType

Compare two keys.

Specified by:

compare in interface DataType

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(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

read

public void read(java.nio.ByteBuffer buff,
                 java.lang.Object[] obj,
                 int len,
                 boolean key)

Description copied from interface: DataType

Read a list of objects.

Specified by:

read in interface DataType

Parameters:

buff - the target buffer

obj - the objects

len - the number of objects to read

key - whether the objects are keys

write

public void write(WriteBuffer buff,
                  java.lang.Object[] obj,
                  int len,
                  boolean key)

Description copied from interface: DataType

Write a list of objects.

Specified by:

write in interface DataType

Parameters:

buff - the target buffer

obj - the objects

len - the number of objects to write

key - whether the objects are keys

read

public 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

write

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

Description copied from interface: DataType

Write an object.

Specified by:

write in interface DataType

Parameters:

buff - the target buffer

obj - the value

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object