org.apache.activemq.util
Class LRUSet<E>

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractSet<E>
          org.apache.activemq.util.LRUSet<E>

Type Parameters:

K -

V -

All Implemented Interfaces:

Serializable, Cloneable, Iterable<E>, Collection<E>, Set<E>

public class LRUSet<E>
extends AbstractSet<E>
implements Set<E>, Cloneable, Serializable

A Simple LRU Set

See Also:

Serialized Form

Constructor Summary

LRUSet()
Default constructor for an LRU Cache The default capacity is 10000

LRUSet(int maximumCacheSize)
Constructs a LRUCache with a maximum capacity

LRUSet(int initialCapacity, int maximumCacheSize, float loadFactor, boolean accessOrder)
Constructs an empty LRUCache instance with the specified initial capacity, maximumCacheSize,load factor and ordering mode.

Method Summary

boolean	add(E o)
void	clear()
boolean	contains(Object o)
boolean	isEmpty()
Iterator<E>	iterator()
boolean	remove(Object o)
int	size()

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, 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, equals, hashCode, removeAll, retainAll, toArray, toArray

Constructor Detail

LRUSet

public LRUSet()

Default constructor for an LRU Cache The default capacity is 10000

LRUSet

public LRUSet(int maximumCacheSize)

Constructs a LRUCache with a maximum capacity

Parameters:

maximumCacheSize -

LRUSet

public LRUSet(int initialCapacity,
              int maximumCacheSize,
              float loadFactor,
              boolean accessOrder)

Constructs an empty LRUCache instance with the specified initial capacity, maximumCacheSize,load factor and ordering mode.

Parameters:

initialCapacity - the initial capacity.

maximumCacheSize -

loadFactor - the load factor.

accessOrder - the ordering mode - true for access-order, false for insertion-order.

Throws:

IllegalArgumentException - if the initial capacity is negative or the load factor is non-positive.

Method Detail

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Set<E>

Specified by:

iterator in class AbstractCollection<E>

size

public int size()

Specified by:

size in interface Collection<E>

Specified by:

size in interface Set<E>

Specified by:

size in class AbstractCollection<E>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<E>

Specified by:

isEmpty in interface Set<E>

Overrides:

isEmpty in class AbstractCollection<E>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<E>

Specified by:

contains in interface Set<E>

Overrides:

contains in class AbstractCollection<E>

add

public boolean add(E o)

Specified by:

add in interface Collection<E>

Specified by:

add in interface Set<E>

Overrides:

add in class AbstractCollection<E>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<E>

Specified by:

remove in interface Set<E>

Overrides:

remove in class AbstractCollection<E>

clear

public void clear()

Specified by:

clear in interface Collection<E>

Specified by:

clear in interface Set<E>

Overrides:

clear in class AbstractCollection<E>