com.icegreen.greenmail.util

Class MaxSizeLinkedHashMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

com.icegreen.greenmail.util.MaxSizeLinkedHashMap<K,V>

Type Parameters:

K - the type of keys maintained by this map

V - the type of mapped values

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class MaxSizeLinkedHashMap<K,V>
extends LinkedHashMap<K,V>

A LinkedHashMap with a maximum size. Adding an Entry that would exceed this size results in removing the eldest entry.

Author:

Raimund Klein

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

Constructors

Constructor and Description
MaxSizeLinkedHashMap(int maxSize) Constructs a MaxSizeLinkedHashMap with maximum size maxSize.

Method Summary

Modifier and Type	Method and Description
protected boolean	removeEldestEntry(Map.Entry<K,V> eldest)

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Constructor Detail

MaxSizeLinkedHashMap

public MaxSizeLinkedHashMap(int maxSize)

Constructs a MaxSizeLinkedHashMap with maximum size maxSize.

Parameters:

maxSize - The maximum size for this MaxSizeLinkedHashMap.

Throws:

IllegalArgumentException - if maxSize is not positive.

Method Detail

removeEldestEntry

protected boolean removeEldestEntry(Map.Entry<K,V> eldest)

This implementation will return true if this MaxSizeLinkedHashMap has reached its maximum size, else false.

Overrides:

removeEldestEntry in class LinkedHashMap<K,V>