package net.abhinavsarkar.algorist;

import java.util.Iterator;
import java.util.Optional;

public class LRUCache<K,V>
{

    private final LRWCache<K,V> store;

    public LRUCache(int capacity) {
        this.store = new LRWCache<>(capacity);
    }

    public Optional<V> get(K key)
    {
        Optional<V> val = store.get(key);
        val.ifPresent(v -> put(key, v));
        return val;
    }

    public void remove(K key)
    {
        store.remove(key);
    }

    public void put(K key, V val)
    {
        store.put(key, val);
    }

    public int size()
    {
        return store.size();
    }

    public Iterator<K> iterator()
    {
        return store.iterator();
    }

    @Override
    public String toString()
    {
        return store.toString();
    }

    public static void main(String[] args)
    {
        LRUCache<String, String> cache = new LRUCache<>(4);
        cache.put("a", "abhinav");
        cache.put("b", "batman");
        cache.put("c", "carol");
        cache.put("z", "zellman");
        System.out.println(cache);

        cache.put("w", "walker");
        System.out.println(cache);

        cache.put("c", "carly");
        System.out.println(cache);

        cache.put("x", "xander");
        System.out.println(cache);

        cache.get("w");
        System.out.println(cache);

        cache.put("a", "abhinav");
        System.out.println(cache);
    }


}