/*
 * Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 com.amplifyframework.testutils;

/**
 * Result placeholder to be used when there is no value emitted from a task, but we are interested in the completion of
 * the task.
 */
public final class VoidResult {
    private static VoidResult voidResultInstance;

    private VoidResult() {}

    /**
     * Returns the default instance.
     * @return the default instance.
     */
    public static VoidResult instance() {
        if (voidResultInstance == null) {
            voidResultInstance = new VoidResult();
        }
        return voidResultInstance;
    }
}
