/*
 * Copyright 2012-2018 Chronicle Map Contributors
 *
 * 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.
 */

package net.openhft.chronicle.map.impl;

import net.openhft.chronicle.hash.Data;
import net.openhft.chronicle.map.impl.ret.InstanceReturnValue;
import org.jetbrains.annotations.NotNull;

public final class NullReturnValue<V> implements InstanceReturnValue<V> {

    private static final NullReturnValue<?> NULL_RETURN_VALUE = new NullReturnValue<>();

    private NullReturnValue() {
    }

    @SuppressWarnings("unchecked")
    public static <V> InstanceReturnValue<V> get() {
        return (InstanceReturnValue<V>) NULL_RETURN_VALUE;
    }

    @Override
    public V returnValue() {
        return null;
    }

    @Override
    public void returnValue(@NotNull Data<V> value) {
        // ignore
    }
}
