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