org.h2.mvstore.type

类 StringDataType

java.lang.Object

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

org.h2.mvstore.type.StringDataType

所有已实现的接口:

Comparator<String>, DataType<String>

public class StringDataType
extends BasicDataType<String>

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	binarySearch(String key, Object storageObj, int size, int initialGuess) Perform binary search for the key within the storage
int	compare(String a, String b) Compare two keys.
String[]	createStorage(int size) Create storage object of array type to hold values
int	getMemory(String obj) Calculates the amount of used memory in bytes.
String	read(ByteBuffer buff) Read an object.
void	write(WriteBuffer buff, String s) Write an object.

从类继承的方法 org.h2.mvstore.type.BasicDataType

cast, equals, hashCode, isMemoryEstimationAllowed, read, write

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

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

createStorage

public String[] createStorage(int size)

从接口复制的说明: DataType

Create storage object of array type to hold values

参数:

size - number of values to hold

返回:

storage object

compare

public int compare(String a,
                   String b)

从接口复制的说明: DataType

Compare two keys.

指定者:

compare 在接口中 Comparator<String>

指定者:

compare 在接口中 DataType<String>

覆盖:

compare 在类中 BasicDataType<String>

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

binarySearch

public int binarySearch(String key,
                        Object storageObj,
                        int size,
                        int initialGuess)

从接口复制的说明: DataType

Perform binary search for the key within the storage

指定者:

binarySearch 在接口中 DataType<String>

覆盖:

binarySearch 在类中 BasicDataType<String>

参数:

key - to search for

storageObj - to search within (an array of type T)

size - number of data items in the storage

initialGuess - for key position

返回:

index of the key , if found, - index of the insertion point, if not

getMemory

public int getMemory(String obj)

从接口复制的说明: DataType

Calculates the amount of used memory in bytes.

指定者:

getMemory 在接口中 DataType<String>

指定者:

getMemory 在类中 BasicDataType<String>

参数:

obj - the object

返回:

the used memory

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<String>

指定者:

read 在类中 BasicDataType<String>

参数:

buff - the source buffer

返回:

the object

write

public void write(WriteBuffer buff,
                  String s)

从接口复制的说明: DataType

Write an object.

指定者:

write 在接口中 DataType<String>

指定者:

write 在类中 BasicDataType<String>

参数:

buff - the target buffer

s - the value