Package org.apache.hadoop.hdfs.server.namenode

Class SerialNumberMap<T>

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.SerialNumberMap<T>

@Private
public class SerialNumberMap<T>
extends java.lang.Object

Map object to serial number.

It allows to get the serial number of an object, if the object doesn't exist in the map, a new serial number increased by 1 is generated to map to the object. The mapped object can also be got through the serial number.

The map is thread-safe.

Method Summary

Modifier and Type	Method	Description
T	get(int i)
int	get(T t)
int	size()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

get

public int get(T t)

get

public T get(int i)

size

public int size()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object