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The serializer module of autoload-cache project

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/*
 * Copyright 2002-2015 the original author or authors. 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 org.springframework.cache.support;
package com.jarvis.cache.serializer;

import java.io.Serializable;

/**
 * Simple serializable class that serves as a {@code null} replacement for cache
 * stores which otherwise do not support {@code null} values.
 *
 * @author Juergen Hoeller
 * @since 4.2.2
 */
public final class NullValue implements Serializable {

    static final Object INSTANCE = new NullValue();

    private static final long serialVersionUID = 1L;

    private NullValue() {
    }

    private Object readResolve() {
        return INSTANCE;
    }

}