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annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/ValueKind.java @ 24226:abc19eb35547

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allow java.vm.name and java.vm.version to be initialized from a vm.properties file next to libjvm
author Doug Simon <doug.simon@oracle.com>
date Thu, 24 Aug 2017 22:20:40 +0200
parents c351824fff81
children
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1 /*
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2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package jdk.vm.ci.meta;
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24
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25 /**
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26 * Represents the type of {@link Value values}. This class can be extended by compilers to track
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27 * additional information about values.
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28 */
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29 public abstract class ValueKind<K extends ValueKind<K>> {
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30
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31 private enum IllegalKind implements PlatformKind {
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32 ILLEGAL;
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33
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34 private final EnumKey<IllegalKind> key = new EnumKey<>(this);
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35
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36 public Key getKey() {
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37 return key;
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38 }
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39
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40 public int getSizeInBytes() {
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41 return 0;
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42 }
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43
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44 public int getVectorLength() {
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45 return 0;
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46 }
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47
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48 public char getTypeChar() {
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49 return '-';
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50 }
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51 }
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52
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53 private static class IllegalValueKind extends ValueKind<IllegalValueKind> {
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54
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55 IllegalValueKind() {
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56 super(IllegalKind.ILLEGAL);
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57 }
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58
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59 @Override
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60 public IllegalValueKind changeType(PlatformKind newPlatformKind) {
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61 return this;
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62 }
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63
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64 @Override
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65 public String toString() {
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66 return "ILLEGAL";
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67 }
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68 }
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69
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70 /**
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71 * The non-type.
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72 */
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73 public static final ValueKind<?> Illegal = new IllegalValueKind();
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74
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75 private final PlatformKind platformKind;
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76
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77 public ValueKind(PlatformKind platformKind) {
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78 this.platformKind = platformKind;
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79 }
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80
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81 public final PlatformKind getPlatformKind() {
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82 return platformKind;
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83 }
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84
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85 /**
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86 * Create a new {@link ValueKind} with a different {@link PlatformKind}. Subclasses must
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87 * override this to preserve the additional information added by the compiler.
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88 */
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89 public abstract K changeType(PlatformKind newPlatformKind);
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90
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91 /**
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92 * Returns a String representation of the kind, which will be included at the end of
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93 * {@link Value#toString()} implementation. Defaults to {@link #toString()} but can be
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94 * overridden to provide something more specific.
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95 */
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96 public String getKindSuffix() {
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97 return toString();
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98 }
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99 }