/**
 * Copyright (c) 2010-2019 Contributors to the openHAB project
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 */
package org.openhab.binding.openenergymonitor.internal;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;

/**
 *
 * Simple value cache.
 *
 * @author Pauli Anttila
 * @since 1.12.0
 */
public class ValueCache<K, V> {

    private Map<K, V> stateMap = Collections.synchronizedMap(new HashMap<K, V>());

    public void clear() {
        stateMap.clear();
    }

    public boolean valueEquals(K key, V value) {
        V oldValue = stateMap.get(key);
        return Objects.equals(value, oldValue);
    }

    public void update(K type, V value) {
        stateMap.put(type, value);
    }
}
