Mercurial > hg > truffle
view graal/com.oracle.max.base/src/com/sun/max/collect/Pool.java @ 4266:e2499e6d8aa7
Merge
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 11 Jan 2012 16:31:46 +0100 |
parents | e233f5660da4 |
children |
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/* * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.max.collect; /** * A sequence of {@linkplain PoolObject objects} that are uniquely identified <i>within a sequence</i> by a * {@linkplain PoolObject#serial() serial number} (i.e. an index into the sequence). A subset of the objects * within a pool can be efficiently represented by a {@link PoolSet}. */ public abstract class Pool<T extends PoolObject> implements Iterable<T> { /** * Gets the object in the pool identified by a given serial number. */ public abstract T get(int serial); /** * The number of objects in this pool. All objects in the pool must have a unique serial number in the range * {@code [0 .. length() - 1]}. */ public abstract int length(); /** * Determines if this pool is empty. */ public boolean isEmpty() { return length() == 0; } }