Package com.yourkit.probes

Class ObjectRowIndexMap<Key>

java.lang.Object

com.yourkit.probes.ObjectRowIndexMap<Key>

public final class ObjectRowIndexMap<Key>
extends Object

A weak map of an object to a row index which is a positive integer value. Like an ordinary weak key map, this map does not prevent its keys from being discarded by the garbage collector. Unlike an ordinary weak key map, this map can be used (keeps the stored mapping) even inside the key's finalize() method.

Constructor Summary

Constructors

Constructor	Description
ObjectRowIndexMap()

Method Summary

Modifier and Type	Method	Description
boolean	containsKey(Key key)
int	get(Key key)
int	put(Key key, int value)
boolean	putAtomic(Key key, int newValue, int expectedValue)
boolean	putFirst(Key key, int newValue)
int	remove(Key key)

Methods inherited from class java.lang.Object

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

Constructor Details

ObjectRowIndexMap

public ObjectRowIndexMap()

Method Details

put

public int put(@NotNull
 Key key,
 int value)

Parameters:

key - key with which the specified value is to be associated

value - index to be associated with the specified key

Returns:

previously mapped row index, or Table.NO_ROW if no row was mapped to the object

putAtomic

public boolean putAtomic(@NotNull
 Key key,
 int newValue,
 int expectedValue)

Parameters:

key - key with which the specified newValue is to be associated

newValue - index to be associated with the specified key

expectedValue - the mapping will be changed only if the current mapping is expectedValue

Returns:

true if mapping has been changed

putFirst

public boolean putFirst(@NotNull
 Key key,
 int newValue)

get

public int get(@NotNull
 Key key)

Parameters:

key - the key whose associated index is to be returned

Returns:

mapped row index, or Table.NO_ROW if no row is mapped to the object

containsKey

public boolean containsKey(@NotNull
 Key key)

remove

public int remove(@NotNull
 Key key)

Parameters:

key - the key whose associated index is to be removed

Returns:

previously mapped row index, or Table.NO_ROW if no row was mapped to the object