Mercurial > hg > truffle
view graal/com.oracle.graal.graph/src/com/oracle/graal/graph/NodeNodeMap.java @ 19061:c370e6f39575
Protect against violation of Map interface contract
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Fri, 30 Jan 2015 11:56:24 -0800 |
parents | ea1351d22e55 |
children |
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/* * Copyright (c) 2011, 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.oracle.graal.graph; import java.util.*; public final class NodeNodeMap extends NodeMap<Node> implements Map<Node, Node> { public NodeNodeMap(Graph graph) { super(graph); } public NodeNodeMap(NodeNodeMap copyFrom) { super(copyFrom); } public Node get(Object key) { return super.get((Node) key); } public Node put(Node key, Node value) { Node oldValue = super.get(key); super.set(key, value); return oldValue; } public Node remove(Object key) { throw new UnsupportedOperationException("Cannot remove keys from this map"); } public void putAll(Map<? extends Node, ? extends Node> m) { for (Entry<? extends Node, ? extends Node> entry : m.entrySet()) { put(entry.getKey(), entry.getValue()); } } public Set<Node> keySet() { HashSet<Node> entries = new HashSet<>(); for (int i = 0; i < values.length; ++i) { Object v = values[i]; if (v != null) { Node key = getKey(i); if (key != null) { entries.add(key); } } } /* * The normal contract for entrySet is that modifications of the set are reflected in the * underlying data structure. For simplicity don't allow that but complain if someone tries * to use it that way. */ return Collections.unmodifiableSet(entries); } public Collection<Node> values() { ArrayList<Node> result = new ArrayList<>(this.size()); for (int i = 0; i < values.length; ++i) { Object v = values[i]; if (v != null) { result.add((Node) v); } } return result; } public Set<Map.Entry<Node, Node>> entrySet() { HashSet<Map.Entry<Node, Node>> entries = new HashSet<>(); for (Map.Entry<Node, Node> entry : entries()) { entries.add(entry); } /* * The normal contract for entrySet is that modifications of the set are reflected in the * underlying data structure. For simplicity don't allow that but complain if someone tries * to use it that way. */ return Collections.unmodifiableSet(entries); } }