org.h2.mvstore.type
Class StringDataType

java.lang.Object
  extended by org.h2.mvstore.type.StringDataType
All Implemented Interfaces:
DataType

public class StringDataType
extends java.lang.Object
implements DataType

A string type.


Field Summary
static StringDataType INSTANCE
           
 
Constructor Summary
StringDataType()
           
 
Method Summary
 int compare(java.lang.Object a, java.lang.Object b)
          Compare two keys.
 int getMemory(java.lang.Object obj)
          Estimate the used memory in bytes.
 java.lang.String 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, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

INSTANCE

public static final StringDataType INSTANCE
Constructor Detail

StringDataType

public StringDataType()
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.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(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