1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.api.collections; 24 25 import java.util.Map; 26 import java.util.Set; 27 28 /** 29 * A factory for creating collections. 30 */ 31 public interface CollectionsProvider { 32 33 /** 34 * Creates a set that uses reference-equality in place of object-equality when comparing 35 * entries. 36 */ 37 <E> Set<E> newIdentitySet(); 38 39 /** 40 * Creates a map that uses reference-equality in place of object-equality when comparing keys. 41 */ 42 <K, V> Map<K, V> newIdentityMap(); 43 44 /** 45 * Creates a map that uses reference-equality in place of object-equality when comparing keys. 46 * 47 * @param expectedMaxSize the expected maximum size of the map 48 */ 49 <K, V> Map<K, V> newIdentityMap(int expectedMaxSize); 50 51 /** 52 * Creates a map that uses reference-equality in place of object-equality when comparing keys. 53 * 54 * @param initFrom the returned map is populated with the entries in this map 55 */ 56 <K, V> Map<K, V> newIdentityMap(Map<K, V> initFrom); 57 }