org.h2.mvstore.type

类 StringDataType

java.lang.Object

org.h2.mvstore.type.StringDataType

所有已实现的接口:

DataType

public class StringDataType
extends Object
implements DataType

A string type.

字段概要

字段

限定符和类型	字段和说明
static StringDataType	INSTANCE

构造器概要

构造器

构造器和说明
StringDataType()

方法概要

限定符和类型	方法和说明
int	compare(Object a, Object b) Compare two keys.
int	getMemory(Object obj) Estimate the used memory in bytes.
String	read(ByteBuffer buff) Read an object.
void	read(ByteBuffer buff, Object[] obj, int len, boolean key) Read a list of objects.
void	write(WriteBuffer buff, Object obj) Write an object.
void	write(WriteBuffer buff, Object[] obj, int len, boolean key) Write a list of objects.

从类继承的方法 java.lang.Object

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

字段详细资料

INSTANCE

public static final StringDataType INSTANCE

构造器详细资料

StringDataType

public StringDataType()

方法详细资料

compare

public int compare(Object a,
                   Object b)

从接口复制的说明: DataType

Compare two keys.

指定者:

compare 在接口中 DataType

参数:

a - the first key

b - the second key

返回:

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

getMemory

public int getMemory(Object obj)

从接口复制的说明: DataType

Estimate the used memory in bytes.

指定者:

getMemory 在接口中 DataType

参数:

obj - the object

返回:

the used memory

read

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

从接口复制的说明: DataType

Read a list of objects.

指定者:

read 在接口中 DataType

参数:

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,
                  Object[] obj,
                  int len,
                  boolean key)

从接口复制的说明: DataType

Write a list of objects.

指定者:

write 在接口中 DataType

参数:

buff - the target buffer

obj - the objects

len - the number of objects to write

key - whether the objects are keys

read

public String read(ByteBuffer buff)

从接口复制的说明: DataType

Read an object.

指定者:

read 在接口中 DataType

参数:

buff - the source buffer

返回:

the object

write

public void write(WriteBuffer buff,
                  Object obj)

从接口复制的说明: DataType

Write an object.

指定者:

write 在接口中 DataType

参数:

buff - the target buffer

obj - the value