Package org.h2.util

Class SmallLRUCache<K,​V>

  • Type Parameters:
    K - the key
    V - the value
    All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable, java.util.Map<K,​V>
    public class SmallLRUCache<K,​V>
extends java.util.LinkedHashMap<K,​V>
    This class implements a small LRU object cache.
    See Also:
    Serialized Form

    • Nested Class Summary

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

        java.util.AbstractMap.SimpleEntry<K extends java.lang.Object,​V extends java.lang.Object>, java.util.AbstractMap.SimpleImmutableEntry<K extends java.lang.Object,​V extends java.lang.Object>

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private static long serialVersionUID  
      private int size  

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private SmallLRUCache​(int size)  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static <K,​V>
      SmallLRUCache<K,​V>      		 newInstance​(int size)
      Create a new object with all elements of the given collection.
      protected boolean removeEldestEntry​(java.util.Map.Entry<K,​V> eldest)  
      void setMaxSize​(int size)  

      • 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

    • Field Detail

      • size

        private int size

    • Constructor Detail

      • SmallLRUCache

        private SmallLRUCache​(int size)

    • Method Detail

      • newInstance

        public static <K,​V> SmallLRUCache<K,​V> newInstance​(int size)
        Create a new object with all elements of the given collection.
        Type Parameters:
        K - the key type
        V - the value type
        Parameters:
        size - the number of elements
        Returns:
        the object

      • setMaxSize

        public void setMaxSize​(int size)

      • removeEldestEntry

        protected boolean removeEldestEntry​(java.util.Map.Entry<K,​V> eldest)
        Overrides:
        removeEldestEntry in class java.util.LinkedHashMap<K,​V>