Mercurial > hg > truffle
view truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeClass.java @ 22399:efbc311e9ff2
Turning NodeClass into abstract class to allow its independent implementations.
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Fri, 20 Nov 2015 10:36:52 +0100 |
parents | 07c98b5a9496 |
children | 5033b980cc68 |
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/* * Copyright (c) 2012, 2015, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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.oracle.truffle.api.nodes; import java.security.AccessController; import java.security.PrivilegedAction; import java.util.Iterator; /** * Information about a {@link Node} class. A single instance of this class is allocated for every * subclass of {@link Node} that is used. */ public abstract class NodeClass { private static final ClassValue<NodeClass> nodeClasses = new ClassValue<NodeClass>() { @SuppressWarnings("unchecked") @Override protected NodeClass computeValue(final Class<?> clazz) { assert Node.class.isAssignableFrom(clazz); return AccessController.doPrivileged(new PrivilegedAction<NodeClass>() { public NodeClass run() { return new NodeClassImpl((Class<? extends Node>) clazz); } }); } }; public static NodeClass get(Class<? extends Node> clazz) { return nodeClasses.get(clazz); } public static NodeClass get(Node node) { return node.getNodeClass(); } protected NodeClass() { } public abstract NodeFieldAccessor getNodeClassField(); public abstract NodeFieldAccessor[] getCloneableFields(); public abstract NodeFieldAccessor[] getFields(); public abstract NodeFieldAccessor getParentField(); public abstract NodeFieldAccessor[] getChildFields(); public abstract NodeFieldAccessor[] getChildrenFields(); public abstract Iterator<Node> makeIterator(Node node); }