oracle.javatools.db.util
Class IdentitySet<T>

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractSet<T>
          oracle.javatools.db.util.IdentitySet<T>

All Implemented Interfaces:

java.lang.Iterable<T>, java.util.Collection<T>, java.util.Set<T>

public class IdentitySet<T>
extends java.util.AbstractSet<T>

Set for storing objects and testing their equality only using an identity match - i.e. (obj1 == obj2). Use only when caching objects in a model where identity equality is specifically required, rather than .equals equality or any of the comparisons available for DBObject and DBObjectID through the other Collection and Map implementation in this package.

For a Map implementation using the same model, simply use IdentityHashMap which actually backs this implementation.

This Set is not synchronized for a thread safe Set use Collections.synchronizedSet.

See Also:

IdentityHashMap

Constructor Summary

IdentitySet()

Method Summary

boolean	add(T e)
void	clear()
boolean	contains(java.lang.Object o)
java.util.Iterator<T>	iterator()
boolean	remove(java.lang.Object o)
int	size()

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, isEmpty, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

addAll, containsAll, isEmpty, retainAll, toArray, toArray

Constructor Detail

IdentitySet

public IdentitySet()

Method Detail

iterator

public java.util.Iterator<T> iterator()

Specified by:

iterator in interface java.lang.Iterable<T>

Specified by:

iterator in interface java.util.Collection<T>

Specified by:

iterator in interface java.util.Set<T>

Specified by:

iterator in class java.util.AbstractCollection<T>

size

public int size()

Specified by:

size in interface java.util.Collection<T>

Specified by:

size in interface java.util.Set<T>

Specified by:

size in class java.util.AbstractCollection<T>

add

public boolean add(T e)

Specified by:

add in interface java.util.Collection<T>

Specified by:

add in interface java.util.Set<T>

Overrides:

add in class java.util.AbstractCollection<T>

contains

public boolean contains(java.lang.Object o)

Specified by:

contains in interface java.util.Collection<T>

Specified by:

contains in interface java.util.Set<T>

Overrides:

contains in class java.util.AbstractCollection<T>

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection<T>

Specified by:

remove in interface java.util.Set<T>

Overrides:

remove in class java.util.AbstractCollection<T>

clear

public void clear()

Specified by:

clear in interface java.util.Collection<T>

Specified by:

clear in interface java.util.Set<T>

Overrides:

clear in class java.util.AbstractCollection<T>