ucar.nc2.util

Class HashMapLRU<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

ucar.nc2.util.HashMapLRU<K,V>

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

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

A HashMap that removes the oldest member when it exceeds the maximum number of entries. LOOK replace with something in guava?

See Also:

LinkedHashMap, 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
HashMapLRU(int initialCapacity, int max_entries) Constructor.

Method Summary

Modifier and Type	Method and Description
protected boolean	removeEldestEntry(Map.Entry 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

HashMapLRU

public HashMapLRU(int initialCapacity,
                  int max_entries)

Constructor.

Parameters:

initialCapacity - start with this size

max_entries - dont exceed this number of entries.

Method Detail

removeEldestEntry

protected boolean removeEldestEntry(Map.Entry eldest)

Overrides:

removeEldestEntry in class LinkedHashMap<K,V>