/*
* Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.util;
import java.util.
LinkedHashMap;
import java.util.
Map;
/**
* This class implements a small LRU object cache.
*
* @param <K> the key
* @param <V> the value
*/
public class
SmallLRUCache<K, V> extends
LinkedHashMap<K, V> {
private static final long
serialVersionUID = 1L;
private int
size;
private
SmallLRUCache(int
size) {
super(
size, (float) 0.75, true);
this.
size =
size;
}
/**
* Create a new object with all elements of the given collection.
*
* @param <K> the key type
* @param <V> the value type
* @param size the number of elements
* @return the object
*/
public static <K, V>
SmallLRUCache<K, V>
newInstance(int
size) {
return new
SmallLRUCache<>(
size);
}
public void
setMaxSize(int
size) {
this.
size =
size;
}
@
Override
protected boolean
removeEldestEntry(
Map.
Entry<K, V>
eldest) {
return
size() >
size;
}
}