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annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/ModifiersProvider.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 b39b4a11c1d1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2014, 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 import static java.lang.reflect.Modifier.FINAL;
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26 import static java.lang.reflect.Modifier.PRIVATE;
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27 import static java.lang.reflect.Modifier.PROTECTED;
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28 import static java.lang.reflect.Modifier.PUBLIC;
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29 import static java.lang.reflect.Modifier.STATIC;
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30 import static java.lang.reflect.Modifier.TRANSIENT;
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31 import static java.lang.reflect.Modifier.VOLATILE;
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32
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33 import java.lang.reflect.Modifier;
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34
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35 /**
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36 * A Java element (i.e., a class, interface, field or method) that is described by a set of Java
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37 * language {@linkplain #getModifiers() modifiers}.
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38 */
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39 public interface ModifiersProvider {
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40
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41 /**
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42 * Returns the modifiers for this element.
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43 */
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44 int getModifiers();
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45
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46 /**
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47 * @see Modifier#isInterface(int)
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48 */
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49 default boolean isInterface() {
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50 return Modifier.isInterface(getModifiers());
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51 }
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52
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53 /**
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54 * @see Modifier#isSynchronized(int)
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55 */
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56 default boolean isSynchronized() {
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57 return Modifier.isSynchronized(getModifiers());
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58 }
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59
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60 /**
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61 * @see Modifier#isStatic(int)
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62 */
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63 default boolean isStatic() {
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64 return Modifier.isStatic(getModifiers());
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65 }
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66
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67 /**
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68 * The setting of the final modifier bit for types is somewhat confusing, so don't export
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69 * isFinal by default. Subclasses like {@link ResolvedJavaField} and {@link ResolvedJavaMethod}
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70 * can export it as isFinal, but {@link ResolvedJavaType} can provide a more sensible equivalent
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71 * like {@link ResolvedJavaType#isLeaf}.
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72 *
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73 * @see Modifier#isFinal(int)
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74 */
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75 default boolean isFinalFlagSet() {
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76 return Modifier.isFinal(getModifiers());
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77 }
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78
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79 /**
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80 * @see Modifier#isPublic(int)
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81 */
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82 default boolean isPublic() {
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83 return Modifier.isPublic(getModifiers());
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84 }
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85
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86 /**
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87 * Determines if this element is neither {@linkplain #isPublic() public},
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88 * {@linkplain #isProtected() protected} nor {@linkplain #isPrivate() private}.
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89 */
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90 default boolean isPackagePrivate() {
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91 return ((PUBLIC | PROTECTED | PRIVATE) & getModifiers()) == 0;
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92 }
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93
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94 /**
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95 * @see Modifier#isPrivate(int)
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96 */
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97 default boolean isPrivate() {
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98 return Modifier.isPrivate(getModifiers());
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99 }
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100
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101 /**
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102 * @see Modifier#isProtected(int)
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103 */
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104 default boolean isProtected() {
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105 return Modifier.isProtected(getModifiers());
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106 }
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107
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108 /**
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109 * @see Modifier#isTransient(int)
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110 */
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111 default boolean isTransient() {
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112 return Modifier.isTransient(getModifiers());
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113 }
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114
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115 /**
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116 * @see Modifier#isStrict(int)
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117 */
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118 default boolean isStrict() {
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119 return Modifier.isStrict(getModifiers());
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120 }
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121
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122 /**
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123 * @see Modifier#isVolatile(int)
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124 */
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125 default boolean isVolatile() {
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126 return Modifier.isVolatile(getModifiers());
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127 }
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128
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129 /**
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130 * @see Modifier#isNative(int)
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131 */
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132 default boolean isNative() {
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133 return Modifier.isNative(getModifiers());
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134 }
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135
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136 /**
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137 * @see Modifier#isAbstract(int)
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138 */
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139 default boolean isAbstract() {
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140 return Modifier.isAbstract(getModifiers());
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141 }
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142
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143 /**
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144 * Checks that the method is concrete and not abstract.
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145 *
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146 * @return whether the method is a concrete method
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147 */
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148 default boolean isConcrete() {
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149 return !isAbstract();
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150 }
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151
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152 /**
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153 * This is removed in JDK 9 and should not be used. It used to rely on use of reflection to read
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154 * non-public values from {@link Modifier}. Such cross-module (i.e., {@code jdk.vm.ci} to
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155 * {@code java.base}) reflection is disabled in 9 and will require a VM option such
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156 * {@code --add-exports-private} to be enabled.
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157 */
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158 @Deprecated
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159 static int jvmFieldModifiers() {
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160 // Reflection replaced with hard coded values (which will not change in JDK 8).
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161 final int accEnum = 0x4000;
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162 final int accSynthethic = 0x1000;
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163 return PUBLIC | PRIVATE | PROTECTED | STATIC | FINAL | VOLATILE | TRANSIENT | accEnum | accSynthethic;
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164 }
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165
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166 }