1 /*
   2  * Copyright (c) 2017, 2017, 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 
  24 
  25 package jdk.internal.vm.compiler.collections;
  26 
  27 /**
  28  * Strategy for comparing two objects. Default predefined strategies are {@link #DEFAULT},
  29  * {@link #IDENTITY}, and {@link #IDENTITY_WITH_SYSTEM_HASHCODE}.
  30  *
  31  * @since 1.0
  32  */
  33 public abstract class Equivalence {
  34 
  35     /**
  36      * Default equivalence calling {@link #equals(Object)} to check equality and {@link #hashCode()}
  37      * for obtaining hash values. Do not change the logic of this class as it may be inlined in
  38      * other places.
  39      *
  40      * @since 1.0
  41      */
  42     public static final Equivalence DEFAULT = new Equivalence() {

   1 /*
   2  * Copyright (c) 2017, 2018, 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 
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  39 
  40 
  41 package jdk.internal.vm.compiler.collections;
  42 
  43 /**
  44  * Strategy for comparing two objects. Default predefined strategies are {@link #DEFAULT},
  45  * {@link #IDENTITY}, and {@link #IDENTITY_WITH_SYSTEM_HASHCODE}.
  46  *
  47  * @since 1.0
  48  */
  49 public abstract class Equivalence {
  50 
  51     /**
  52      * Default equivalence calling {@link #equals(Object)} to check equality and {@link #hashCode()}
  53      * for obtaining hash values. Do not change the logic of this class as it may be inlined in
  54      * other places.
  55      *
  56      * @since 1.0
  57      */
  58     public static final Equivalence DEFAULT = new Equivalence() {