org.snapscript.common.LeastRecentlyUsedCache Maven / Gradle / Ivy

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package org.snapscript.common;

import java.util.Map;
import java.util.Set;

import org.snapscript.common.LeastRecentlyUsedMap.RemovalListener;

public class LeastRecentlyUsedCache implements Cache {

   private final Map cache;

   public LeastRecentlyUsedCache() {
      this(null);
   }

   public LeastRecentlyUsedCache(int capacity) {
      this(null, capacity);
   }

   public LeastRecentlyUsedCache(RemovalListener removalListener) {
      this(removalListener, 100);
   }

   public LeastRecentlyUsedCache(RemovalListener removalListener, int capacity) {
      this.cache = new LeastRecentlyUsedMap(removalListener, capacity);
   }

   @Override
   public synchronized void clear() {
      cache.clear();
   }

   @Override
   public synchronized int size() {
      return cache.size();
   }

   @Override
   public synchronized Set keySet() {
      return cache.keySet();
   }

   @Override
   public synchronized V fetch(K key) {
      return cache.get(key);
   }

   @Override
   public synchronized void cache(K key, V value) {
      cache.put(key, value);
   }

   @Override
   public synchronized V take(K key) {
      return cache.remove(key);
   }

   @Override
   public synchronized boolean contains(K key) {
      return cache.containsKey(key);
   }

   @Override
   public synchronized boolean isEmpty() {
      return cache.isEmpty();
   }
   
   @Override
   public synchronized String toString() {
      return String.valueOf(cache);
   }
}