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

java.lang.Object
  extended by java.util.AbstractCollection<E>
      extended by java.util.AbstractSet<E>
          extended by org.apache.activemq.util.LRUSet<E>
Type Parameters:
K -
V -
All Implemented Interfaces:
java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<E>, java.util.Collection<E>, java.util.Set<E>

public class LRUSet<E>
extends java.util.AbstractSet<E>
implements java.util.Set<E>, java.lang.Cloneable, java.io.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(java.lang.Object o)
           
 boolean isEmpty()
           
 java.util.Iterator<E> 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, 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:
java.lang.IllegalArgumentException - if the initial capacity is negative or the load factor is non-positive.
Method Detail

iterator

public java.util.Iterator<E> iterator()
Specified by:
iterator in interface java.lang.Iterable<E>
Specified by:
iterator in interface java.util.Collection<E>
Specified by:
iterator in interface java.util.Set<E>
Specified by:
iterator in class java.util.AbstractCollection<E>

size

public int size()
Specified by:
size in interface java.util.Collection<E>
Specified by:
size in interface java.util.Set<E>
Specified by:
size in class java.util.AbstractCollection<E>

isEmpty

public boolean isEmpty()
Specified by:
isEmpty in interface java.util.Collection<E>
Specified by:
isEmpty in interface java.util.Set<E>
Overrides:
isEmpty in class java.util.AbstractCollection<E>

contains

public boolean contains(java.lang.Object o)
Specified by:
contains in interface java.util.Collection<E>
Specified by:
contains in interface java.util.Set<E>
Overrides:
contains in class java.util.AbstractCollection<E>

add

public boolean add(E o)
Specified by:
add in interface java.util.Collection<E>
Specified by:
add in interface java.util.Set<E>
Overrides:
add in class java.util.AbstractCollection<E>

remove

public boolean remove(java.lang.Object o)
Specified by:
remove in interface java.util.Collection<E>
Specified by:
remove in interface java.util.Set<E>
Overrides:
remove in class java.util.AbstractCollection<E>

clear

public void clear()
Specified by:
clear in interface java.util.Collection<E>
Specified by:
clear in interface java.util.Set<E>
Overrides:
clear in class java.util.AbstractCollection<E>


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