001/*
002 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.graph;
024
025import java.util.*;
026
027import com.oracle.graal.api.collections.*;
028
029/**
030 * A default implementation of {@link NodeCollectionsProvider} that creates standard JDK collection
031 * class objects.
032 */
033public class DefaultNodeCollectionsProvider extends DefaultCollectionsProvider implements NodeCollectionsProvider {
034
035    public <E extends Node> Set<E> newNodeIdentitySet() {
036        return Collections.newSetFromMap(newNodeIdentityMap());
037    }
038
039    public <K extends Node, V> Map<K, V> newNodeIdentityMap() {
040        return new IdentityHashMap<>();
041    }
042
043    public <K extends Node, V> Map<K, V> newNodeIdentityMap(int expectedMaxSize) {
044        return new IdentityHashMap<>(expectedMaxSize);
045    }
046
047    public <K extends Node, V> Map<K, V> newNodeIdentityMap(Map<K, V> initFrom) {
048        return new IdentityHashMap<>(initFrom);
049    }
050}