Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/JavaKind.java @ 23736:9bc5db6cdbb0
Backport method renames from jdk9.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Thu, 11 Aug 2016 15:53:05 +0200 |
parents | 1d4ce2d19e52 |
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1 /* |
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2 * Copyright (c) 2009, 2015, 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 java.lang.reflect.Array; |
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26 |
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27 //JaCoCo Exclude |
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28 |
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29 /** |
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30 * Denotes the basic kinds of types in CRI, including the all the Java primitive types, for example, |
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31 * {@link JavaKind#Int} for {@code int} and {@link JavaKind#Object} for all object types. A kind has |
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32 * a single character short name, a Java name, and a set of flags further describing its behavior. |
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33 */ |
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34 public enum JavaKind { |
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35 /** The primitive boolean kind, represented as an int on the stack. */ |
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36 Boolean('Z', "boolean", 1, true, java.lang.Boolean.TYPE, java.lang.Boolean.class), |
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37 |
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38 /** The primitive byte kind, represented as an int on the stack. */ |
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39 Byte('B', "byte", 1, true, java.lang.Byte.TYPE, java.lang.Byte.class), |
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40 |
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41 /** The primitive short kind, represented as an int on the stack. */ |
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42 Short('S', "short", 1, true, java.lang.Short.TYPE, java.lang.Short.class), |
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43 |
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44 /** The primitive char kind, represented as an int on the stack. */ |
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45 Char('C', "char", 1, true, java.lang.Character.TYPE, java.lang.Character.class), |
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46 |
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47 /** The primitive int kind, represented as an int on the stack. */ |
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48 Int('I', "int", 1, true, java.lang.Integer.TYPE, java.lang.Integer.class), |
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49 |
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50 /** The primitive float kind. */ |
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51 Float('F', "float", 1, false, java.lang.Float.TYPE, java.lang.Float.class), |
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52 |
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53 /** The primitive long kind. */ |
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54 Long('J', "long", 2, false, java.lang.Long.TYPE, java.lang.Long.class), |
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55 |
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56 /** The primitive double kind. */ |
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57 Double('D', "double", 2, false, java.lang.Double.TYPE, java.lang.Double.class), |
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58 |
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59 /** The Object kind, also used for arrays. */ |
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60 Object('A', "Object", 1, false, null, null), |
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61 |
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62 /** The void kind. */ |
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63 Void('V', "void", 0, false, java.lang.Void.TYPE, java.lang.Void.class), |
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64 |
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65 /** The non-type. */ |
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66 Illegal('-', "illegal", 0, false, null, null); |
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67 |
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68 private final char typeChar; |
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69 private final String javaName; |
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70 private final boolean isStackInt; |
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71 private final Class<?> primitiveJavaClass; |
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72 private final Class<?> boxedJavaClass; |
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73 private final int slotCount; |
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74 |
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75 JavaKind(char typeChar, String javaName, int slotCount, boolean isStackInt, Class<?> primitiveJavaClass, Class<?> boxedJavaClass) { |
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76 this.typeChar = typeChar; |
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77 this.javaName = javaName; |
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78 this.slotCount = slotCount; |
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79 this.isStackInt = isStackInt; |
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80 this.primitiveJavaClass = primitiveJavaClass; |
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82 assert primitiveJavaClass == null || javaName.equals(primitiveJavaClass.getName()); |
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83 } |
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84 |
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85 /** |
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86 * Returns the number of stack slots occupied by this kind according to the Java bytecodes |
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87 * specification. |
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88 */ |
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89 public int getSlotCount() { |
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90 return this.slotCount; |
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91 } |
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92 |
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93 /** |
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94 * Returns whether this kind occupied two stack slots. |
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95 */ |
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96 public boolean needsTwoSlots() { |
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97 return this.slotCount == 2; |
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98 } |
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99 |
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100 /** |
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101 * Returns the name of the kind as a single upper case character. For the void and primitive |
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102 * kinds, this is the <i>FieldType</i> term in |
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103 * <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.3.2-200"> |
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104 * table 4.3-A</a> of the JVM Specification. For {@link #Object}, the character {@code 'A'} is |
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105 * returned and for {@link #Illegal}, {@code '-'} is returned. |
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106 */ |
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107 public char getTypeChar() { |
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108 return typeChar; |
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109 } |
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110 |
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111 /** |
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112 * Returns the name of this kind which will also be it Java programming language name if it is |
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113 * {@linkplain #isPrimitive() primitive} or {@code void}. |
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114 */ |
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115 public String getJavaName() { |
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116 return javaName; |
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117 } |
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118 |
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119 /** |
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120 * Checks whether this type is a Java primitive type. |
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121 * |
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122 * @return {@code true} if this is {@link #Boolean}, {@link #Byte}, {@link #Char}, |
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123 * {@link #Short}, {@link #Int}, {@link #Long}, {@link #Float}, {@link #Double}, or |
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124 * {@link #Void}. |
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125 */ |
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126 public boolean isPrimitive() { |
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127 return primitiveJavaClass != null; |
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128 } |
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129 |
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130 /** |
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131 * Returns the kind that represents this kind when on the Java operand stack. |
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132 * |
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133 * @return the kind used on the operand stack |
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134 */ |
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135 public JavaKind getStackKind() { |
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136 if (isStackInt) { |
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137 return Int; |
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138 } |
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139 return this; |
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140 } |
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141 |
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142 /** |
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143 * Checks whether this type is a Java primitive type representing an integer number. |
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144 * |
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145 * @return {@code true} if the stack kind is {@link #Int} or {@link #Long}. |
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146 */ |
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147 public boolean isNumericInteger() { |
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148 return isStackInt || this == JavaKind.Long; |
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149 } |
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150 |
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151 /** |
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152 * Checks whether this type is a Java primitive type representing an unsigned number. |
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153 * |
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154 * @return {@code true} if the kind is {@link #Boolean} or {@link #Char}. |
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155 */ |
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156 public boolean isUnsigned() { |
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157 return this == JavaKind.Boolean || this == JavaKind.Char; |
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158 } |
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159 |
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160 /** |
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161 * Checks whether this type is a Java primitive type representing a floating point number. |
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162 * |
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163 * @return {@code true} if this is {@link #Float} or {@link #Double}. |
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164 */ |
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165 public boolean isNumericFloat() { |
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166 return this == JavaKind.Float || this == JavaKind.Double; |
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167 } |
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168 |
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169 /** |
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170 * Checks whether this represent an Object of some sort. |
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171 * |
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172 * @return {@code true} if this is {@link #Object}. |
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173 */ |
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174 public boolean isObject() { |
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175 return this == JavaKind.Object; |
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176 } |
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177 |
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178 /** |
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179 * Returns the kind corresponding to the Java type string. |
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180 * |
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181 * @param typeString the Java type string |
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182 * @return the kind |
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183 */ |
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184 public static JavaKind fromTypeString(String typeString) { |
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185 assert typeString.length() > 0; |
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186 final char first = typeString.charAt(0); |
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187 if (first == '[' || first == 'L') { |
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188 return JavaKind.Object; |
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189 } |
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190 return JavaKind.fromPrimitiveOrVoidTypeChar(first); |
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191 } |
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192 |
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193 /** |
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194 * Returns the kind of a word given the size of a word in bytes. |
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195 * |
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196 * @param wordSizeInBytes the size of a word in bytes |
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197 * @return the kind representing a word value |
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198 */ |
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199 public static JavaKind fromWordSize(int wordSizeInBytes) { |
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200 if (wordSizeInBytes == 8) { |
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201 return JavaKind.Long; |
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202 } else { |
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203 assert wordSizeInBytes == 4 : "Unsupported word size!"; |
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204 return JavaKind.Int; |
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205 } |
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206 } |
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207 |
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208 /** |
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209 * Returns the kind from the character describing a primitive or void. |
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210 * |
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211 * @param ch the character for a void or primitive kind as returned by {@link #getTypeChar()} |
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212 * @return the kind |
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213 */ |
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214 public static JavaKind fromPrimitiveOrVoidTypeChar(char ch) { |
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215 switch (ch) { |
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216 case 'Z': |
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217 return Boolean; |
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218 case 'C': |
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219 return Char; |
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220 case 'F': |
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221 return Float; |
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222 case 'D': |
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223 return Double; |
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224 case 'B': |
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225 return Byte; |
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226 case 'S': |
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227 return Short; |
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228 case 'I': |
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229 return Int; |
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230 case 'J': |
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231 return Long; |
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232 case 'V': |
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233 return Void; |
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234 } |
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235 throw new IllegalArgumentException("unknown primitive or void type character: " + ch); |
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236 } |
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237 |
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238 /** |
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239 * Returns the Kind representing the given Java class. |
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240 * |
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241 * @param klass the class |
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242 * @return the kind |
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243 */ |
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244 public static JavaKind fromJavaClass(Class<?> klass) { |
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245 if (klass == Boolean.primitiveJavaClass) { |
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246 return Boolean; |
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247 } else if (klass == Byte.primitiveJavaClass) { |
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248 return Byte; |
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249 } else if (klass == Short.primitiveJavaClass) { |
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250 return Short; |
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251 } else if (klass == Char.primitiveJavaClass) { |
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252 return Char; |
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253 } else if (klass == Int.primitiveJavaClass) { |
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254 return Int; |
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255 } else if (klass == Long.primitiveJavaClass) { |
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256 return Long; |
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257 } else if (klass == Float.primitiveJavaClass) { |
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258 return Float; |
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259 } else if (klass == Double.primitiveJavaClass) { |
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260 return Double; |
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261 } else if (klass == Void.primitiveJavaClass) { |
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262 return Void; |
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263 } else { |
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264 return Object; |
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265 } |
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266 } |
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267 |
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268 /** |
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269 * Returns the Java class representing this kind. |
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270 * |
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271 * @return the Java class |
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272 */ |
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273 public Class<?> toJavaClass() { |
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274 return primitiveJavaClass; |
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275 } |
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276 |
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277 /** |
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278 * Returns the Java class for instances of boxed values of this kind. |
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279 * |
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280 * @return the Java class |
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281 */ |
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282 public Class<?> toBoxedJavaClass() { |
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283 return boxedJavaClass; |
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284 } |
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285 |
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286 /** |
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287 * Converts this value type to a string. |
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288 */ |
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289 @Override |
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290 public String toString() { |
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291 return javaName; |
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292 } |
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293 |
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294 /** |
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295 * Marker interface for types that should be {@linkplain JavaKind#format(Object) formatted} with |
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296 * their {@link Object#toString()} value. Calling {@link Object#toString()} on other objects |
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297 * poses a security risk because it can potentially call user code. |
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298 */ |
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299 public interface FormatWithToString { |
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300 } |
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301 |
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302 /** |
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303 * Classes for which invoking {@link Object#toString()} does not run user code. |
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304 */ |
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305 private static boolean isToStringSafe(Class<?> c) { |
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306 return c == Boolean.class || c == Byte.class || c == Character.class || c == Short.class || c == Integer.class || c == Float.class || c == Long.class || c == Double.class; |
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307 } |
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308 |
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309 /** |
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310 * Gets a formatted string for a given value of this kind. |
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311 * |
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312 * @param value a value of this kind |
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313 * @return a formatted string for {@code value} based on this kind |
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314 */ |
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315 public String format(Object value) { |
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316 if (isPrimitive()) { |
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317 assert isToStringSafe(value.getClass()); |
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318 return value.toString(); |
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319 } else { |
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320 if (value == null) { |
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321 return "null"; |
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322 } else { |
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323 if (value instanceof String) { |
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324 String s = (String) value; |
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325 if (s.length() > 50) { |
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326 return "String:\"" + s.substring(0, 30) + "...\""; |
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327 } else { |
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328 return "String:\"" + s + '"'; |
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329 } |
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330 } else if (value instanceof JavaType) { |
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331 return "JavaType:" + ((JavaType) value).toJavaName(); |
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332 } else if (value instanceof Enum) { |
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333 return MetaUtil.getSimpleName(value.getClass(), true) + ":" + ((Enum<?>) value).name(); |
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334 } else if (value instanceof FormatWithToString) { |
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335 return MetaUtil.getSimpleName(value.getClass(), true) + ":" + String.valueOf(value); |
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336 } else if (value instanceof Class<?>) { |
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337 return "Class:" + ((Class<?>) value).getName(); |
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338 } else if (isToStringSafe(value.getClass())) { |
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339 return value.toString(); |
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340 } else if (value.getClass().isArray()) { |
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341 return formatArray(value); |
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342 } else { |
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343 return MetaUtil.getSimpleName(value.getClass(), true) + "@" + System.identityHashCode(value); |
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344 } |
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345 } |
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346 } |
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347 } |
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348 |
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349 private static final int MAX_FORMAT_ARRAY_LENGTH = 5; |
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350 |
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351 private static String formatArray(Object array) { |
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352 Class<?> componentType = array.getClass().getComponentType(); |
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353 assert componentType != null; |
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354 int arrayLength = Array.getLength(array); |
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355 StringBuilder buf = new StringBuilder(MetaUtil.getSimpleName(componentType, true)).append('[').append(arrayLength).append("]{"); |
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356 int length = Math.min(MAX_FORMAT_ARRAY_LENGTH, arrayLength); |
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357 boolean primitive = componentType.isPrimitive(); |
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358 for (int i = 0; i < length; i++) { |
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359 if (primitive) { |
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360 buf.append(Array.get(array, i)); |
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361 } else { |
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362 Object o = ((Object[]) array)[i]; |
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363 buf.append(JavaKind.Object.format(o)); |
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364 } |
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365 if (i != length - 1) { |
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366 buf.append(", "); |
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367 } |
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368 } |
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369 if (arrayLength != length) { |
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370 buf.append(", ..."); |
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371 } |
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372 return buf.append('}').toString(); |
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373 } |
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374 |
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375 /** |
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376 * Gets the minimum value that can be represented as a value of this kind. |
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377 * |
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378 * @return the minimum value represented as a {@code long} |
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379 */ |
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380 public long getMinValue() { |
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381 switch (this) { |
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382 case Boolean: |
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383 return 0; |
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384 case Byte: |
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385 return java.lang.Byte.MIN_VALUE; |
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386 case Char: |
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387 return java.lang.Character.MIN_VALUE; |
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388 case Short: |
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389 return java.lang.Short.MIN_VALUE; |
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390 case Int: |
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391 return java.lang.Integer.MIN_VALUE; |
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392 case Long: |
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393 return java.lang.Long.MIN_VALUE; |
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394 case Float: |
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395 return java.lang.Float.floatToRawIntBits(java.lang.Float.MIN_VALUE); |
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396 case Double: |
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397 return java.lang.Double.doubleToRawLongBits(java.lang.Double.MIN_VALUE); |
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398 default: |
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399 throw new IllegalArgumentException("illegal call to minValue on " + this); |
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400 } |
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401 } |
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402 |
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403 /** |
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404 * Gets the maximum value that can be represented as a value of this kind. |
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405 * |
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406 * @return the maximum value represented as a {@code long} |
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407 */ |
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408 public long getMaxValue() { |
5441
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409 switch (this) { |
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410 case Boolean: |
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411 return 1; |
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412 case Byte: |
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413 return java.lang.Byte.MAX_VALUE; |
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414 case Char: |
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415 return java.lang.Character.MAX_VALUE; |
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416 case Short: |
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417 return java.lang.Short.MAX_VALUE; |
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418 case Int: |
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419 return java.lang.Integer.MAX_VALUE; |
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420 case Long: |
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421 return java.lang.Long.MAX_VALUE; |
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422 case Float: |
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423 return java.lang.Float.floatToRawIntBits(java.lang.Float.MAX_VALUE); |
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424 case Double: |
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425 return java.lang.Double.doubleToRawLongBits(java.lang.Double.MAX_VALUE); |
5441
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426 default: |
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|
427 throw new IllegalArgumentException("illegal call to maxValue on " + this); |
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428 } |
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429 } |
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430 |
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|
431 /** |
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432 * Number of bytes that are necessary to represent a value of this kind. |
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433 * |
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434 * @return the number of bytes |
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435 */ |
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|
436 public int getByteCount() { |
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New methods for querying memory usage of individual objects and object graphs in Graal API (MetaAccessProvider#getMemorySize, MetaUtil#getMemorySizeRecursive).
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|
437 if (this == Boolean) { |
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|
438 return 1; |
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New methods for querying memory usage of individual objects and object graphs in Graal API (MetaAccessProvider#getMemorySize, MetaUtil#getMemorySizeRecursive).
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|
439 } else { |
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|
440 return getBitCount() >> 3; |
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New methods for querying memory usage of individual objects and object graphs in Graal API (MetaAccessProvider#getMemorySize, MetaUtil#getMemorySizeRecursive).
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441 } |
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New methods for querying memory usage of individual objects and object graphs in Graal API (MetaAccessProvider#getMemorySize, MetaUtil#getMemorySizeRecursive).
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442 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
13901
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|
443 |
be0d961e3a88
New methods for querying memory usage of individual objects and object graphs in Graal API (MetaAccessProvider#getMemorySize, MetaUtil#getMemorySizeRecursive).
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|
444 /** |
6328
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|
445 * Number of bits that are necessary to represent a value of this kind. |
15040
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|
446 * |
6328
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|
447 * @return the number of bits |
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448 */ |
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|
449 public int getBitCount() { |
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450 switch (this) { |
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451 case Boolean: |
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452 return 1; |
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453 case Byte: |
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454 return 8; |
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455 case Char: |
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456 case Short: |
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457 return 16; |
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458 case Float: |
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459 return 32; |
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460 case Int: |
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461 return 32; |
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462 case Double: |
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463 return 64; |
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464 case Long: |
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465 return 64; |
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466 default: |
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467 throw new IllegalArgumentException("illegal call to bits on " + this); |
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468 } |
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469 } |
3733
e233f5660da4
Added Java files from Maxine project.
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470 } |