/*-
 * ============LICENSE_START=======================================================
 * ONAP : APPC
 * ================================================================================
 * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Copyright (C) 2017 Amdocs
 * =============================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * ============LICENSE_END=========================================================
 */

package org.onap.appc.cache.impl;

import org.onap.appc.cache.CacheStrategies;
import org.onap.appc.cache.CacheStrategy;
import org.onap.appc.cache.MetadataCache;

/**
 * Implementation of MetadataCache
 * @param <K> Key
 * @param <V> Value
 */
public class MetadataCacheImpl<K,V> implements MetadataCache<K,V> {

    private CacheStrategy strategy;

    MetadataCacheImpl(){
        this(CacheStrategies.LRU);
    }

    MetadataCacheImpl(CacheStrategies strategy){
        this.strategy = initializeStrategy(strategy);
    }

    private CacheStrategy initializeStrategy(CacheStrategies strategy) {
        if (strategy != null) {
            switch (strategy) {
                case LRU:
                    return new LRUCache<>(50);
                default:
                    // do nothing
            }
        }
        return null;
    }

    @Override
    public V getObject(K key) {
        return (V)strategy.getObject(key);
    }

    @Override
    public void putObject(K key, V value) {
        strategy.putObject(key, value);
    }
}