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/*
 * SPDX-FileCopyrightText: The memoization.java Authors
 * SPDX-License-Identifier: 0BSD
 */

package wtf.metio.memoization.jool;

import org.jooq.lambda.function.Function4;
import wtf.metio.memoization.core.AbstractMemoizer;

import java.util.concurrent.ConcurrentMap;

import static java.util.Objects.requireNonNull;

final class Function4Memoizer
        extends AbstractMemoizer
        implements Function4 {

    private final Function4 keyFunction;
    private final Function4 function;

    Function4Memoizer(
            final ConcurrentMap cache,
            final Function4 keyFunction,
            final Function4 function) {
        super(cache);
        this.keyFunction = requireNonNull(keyFunction, "Provide a key function.");
        this.function = requireNonNull(function,
                "Cannot memoize a NULL Function4 - provide an actual Function4 to fix this.");
    }

    @Override
    public OUTPUT apply(final TYPE1 v1, final TYPE2 v2, final TYPE3 v3, final TYPE4 v4) {
        return computeIfAbsent(keyFunction.apply(v1, v2, v3, v4), key -> function.apply(v1, v2, v3, v4));
    }

}