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Swirlds is a software platform designed to build fully-distributed applications that harness the power of the cloud without servers. Now you can develop applications with fairness in decision making, speed, trust and reliability, at a fraction of the cost of traditional server-based platforms.
/*
* Copyright (C) 2016-2024 Hedera Hashgraph, LLC
*
* 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 com.swirlds.common.utility;
/**
* A wrapper around an arbitrary object that is auto closeable.
*
* @param
* the type of the wrapped object
*/
public class AutoCloseableWrapper implements AutoCloseable {
private static final AutoCloseableWrapper EMPTY = new AutoCloseableWrapper<>(null, () -> {});
private final T object;
private final Runnable closeCallback;
/**
* Create a new AutoCloseable wrapper.
*
* @param object
* The object that is being wrapped.
* @param closeCallback
* The function that is called when the wrapper is closed.
*/
public AutoCloseableWrapper(T object, Runnable closeCallback) {
this.object = object;
this.closeCallback = closeCallback;
}
/**
* Get the wrapped object.
*
* @return the wrapped object
*/
public T get() {
return object;
}
/**
* {@inheritDoc}
*/
@Override
public void close() {
closeCallback.run();
}
/**
* Get an empty wrapper.
*
* @return an empty wrapper
*/
@SuppressWarnings("unchecked")
public static AutoCloseableWrapper empty() {
return (AutoCloseableWrapper) EMPTY;
}
}