Mercurial > hg > truffle
comparison graal/com.oracle.max.base/src/com/sun/max/collect/Pool.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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3732:3e2e8b8abdaf | 3733:e233f5660da4 |
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1 /* | |
2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 package com.sun.max.collect; | |
24 | |
25 /** | |
26 * A sequence of {@linkplain PoolObject objects} that are uniquely identified <i>within a sequence</i> by a | |
27 * {@linkplain PoolObject#serial() serial number} (i.e. an index into the sequence). A subset of the objects | |
28 * within a pool can be efficiently represented by a {@link PoolSet}. | |
29 */ | |
30 public abstract class Pool<T extends PoolObject> implements Iterable<T> { | |
31 | |
32 /** | |
33 * Gets the object in the pool identified by a given serial number. | |
34 */ | |
35 public abstract T get(int serial); | |
36 | |
37 /** | |
38 * The number of objects in this pool. All objects in the pool must have a unique serial number in the range | |
39 * {@code [0 .. length() - 1]}. | |
40 */ | |
41 public abstract int length(); | |
42 | |
43 /** | |
44 * Determines if this pool is empty. | |
45 */ | |
46 public boolean isEmpty() { | |
47 return length() == 0; | |
48 } | |
49 } |