/*
 * Copyright (C) 2015, Google Inc.
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
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 * All rights reserved.
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 * without modification, are permitted provided that the following
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 * - Redistributions of source code must retain the above copyright
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 *   with the distribution.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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package org.eclipse.jgit.lib;

/**
 * Simple set of ObjectIds.
 * <p>
 * Usually backed by a read-only data structure such as
 * {@link org.eclipse.jgit.internal.storage.file.PackIndex}. Mutable types like
 * {@link org.eclipse.jgit.lib.ObjectIdOwnerMap} also implement the interface by
 * checking keys.
 *
 * @since 4.2
 */
public interface ObjectIdSet {
	/**
	 * Returns true if the objectId is contained within the collection.
	 *
	 * @param objectId
	 *            the objectId to find
	 * @return whether the collection contains the objectId.
	 */
	boolean contains(AnyObjectId objectId);
}