/*
 * Copyright (c) 2018-2020 bartimaeusnek Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following
 * conditions: The above copyright notice and this permission notice shall be included in all copies or substantial
 * portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

package bartworks.util;

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

public class NonNullWrappedHashMap<K, V> extends HashMap<K, V> {

    private static final long serialVersionUID = 46345163103910175L;
    private final V defaultValue;

    public NonNullWrappedHashMap(int initialCapacity, float loadFactor, V defaultValue) {
        super(initialCapacity, loadFactor);
        this.defaultValue = Objects.requireNonNull(defaultValue);
    }

    public NonNullWrappedHashMap(int initialCapacity, V defaultValue) {
        super(initialCapacity);
        this.defaultValue = Objects.requireNonNull(defaultValue);
    }

    public NonNullWrappedHashMap(V defaultValue) {
        this.defaultValue = Objects.requireNonNull(defaultValue);
    }

    public NonNullWrappedHashMap(Map<? extends K, ? extends V> m, V defaultValue) {
        super(m);
        this.defaultValue = Objects.requireNonNull(defaultValue);
    }

    @Override
    public V get(Object key) {
        return this.getOrDefault(key, this.defaultValue);
    }

    @Override
    public V getOrDefault(Object key, V defaultValue) {
        return Objects.requireNonNull(
            Optional.ofNullable(super.getOrDefault(key, defaultValue))
                .orElse(this.defaultValue));
    }
}