org.h2.mvstore.type
Class StringType

java.lang.Object
  org.h2.mvstore.type.StringType

All Implemented Interfaces:

DataType

public class StringType
extends java.lang.Object
implements DataType

A string type.

Field Summary

static StringType

INSTANCE

Constructor Summary

StringType()

Method Summary

java.lang.String	asString() Get the stable string representation that is used to build this data type.
int	compare(java.lang.Object a, java.lang.Object b) 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.String	read(java.nio.ByteBuffer buff) Read an object.
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

INSTANCE

public static final StringType INSTANCE

Constructor Detail

StringType

public StringType()

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

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

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 java.lang.String 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(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

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