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annotate graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/ResolvedJavaType.java @ 7060:06d5f450f32b

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rename: ResolvedJavaType.isArrayClass() -> ResolvedJavaType.isArray()
author Doug Simon <doug.simon@oracle.com>
date Tue, 27 Nov 2012 22:26:18 +0100
parents e4d9f153934f
children 4c0d132dca4d
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1 /*
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2 * Copyright (c) 2009, 2012, 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 com.oracle.graal.api.meta;
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24
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25 import java.lang.annotation.*;
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26 import java.lang.reflect.*;
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28 /**
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29 * Represents a resolved Java types. Types include primitives, objects, {@code void}, and arrays thereof. Types, like
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30 * fields and methods, are resolved through {@link ConstantPool constant pools}.
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31 */
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32 public interface ResolvedJavaType extends JavaType {
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34 /**
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35 * Represents each of the several different parts of the runtime representation of a type which compiled code may
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36 * need to reference individually. These may or may not be different objects or data structures, depending on the
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37 * runtime system.
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38 */
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39 public enum Representation {
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40 /**
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41 * The runtime representation of the data structure containing the static primitive fields of this type.
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42 */
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43 StaticPrimitiveFields,
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44
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45 /**
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46 * The runtime representation of the data structure containing the static object fields of this type.
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47 */
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48 StaticObjectFields,
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49
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50 /**
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51 * The runtime representation of the Java class object of this type.
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52 */
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53 JavaClass,
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54
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55 /**
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56 * The runtime representation of the "hub" of this type--that is, the closest part of the type representation
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57 * which is typically stored in the object header.
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58 */
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59 ObjectHub
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60 }
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61
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62 /**
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63 * Gets the encoding of (that is, a constant representing the value of) the specified part of this type.
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64 *
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65 * @param r the part of this type
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66 * @return a constant representing a reference to the specified part of this type
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67 */
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68 Constant getEncoding(Representation r);
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69
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70 /**
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71 * Checks whether this type has a finalizer method.
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72 *
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73 * @return {@code true} if this class has a finalizer
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74 */
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75 boolean hasFinalizer();
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76
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77 /**
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78 * Checks whether this type has any finalizable subclasses so far. Any decisions based on this information require
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79 * the registration of a dependency, since this information may change.
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80 *
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81 * @return {@code true} if this class has any subclasses with finalizers
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82 */
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83 boolean hasFinalizableSubclass();
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84
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85 /**
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86 * Checks whether this type is an interface.
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87 *
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88 * @return {@code true} if this type is an interface
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89 */
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90 boolean isInterface();
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91
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92 /**
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93 * Checks whether this type is an instance class.
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94 *
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95 * @return {@code true} if this type is an instance class
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96 */
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97 boolean isInstanceClass();
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98
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99 /**
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100 * Checks whether this type is an array class.
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101 *
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102 * @return {@code true} if this type is an array class
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103 */
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104 boolean isArray();
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105
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106 /**
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107 * Checks whether this type is primitive.
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108 *
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109 * @return {@code true} if this type is primitive
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110 */
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111 boolean isPrimitive();
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112
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113 /**
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114 * Returns the Java language modifiers for this type, as an integer. The {@link Modifier} class should be used to
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115 * decode the modifiers. Only the flags specified in the JVM specification will be included in the returned mask.
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116 * This method is identical to {@link Class#getModifiers()} in terms of the value return for this type.
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117 */
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118 int getModifiers();
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119
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120 /**
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121 * Checks whether this type is initialized.
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122 *
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123 * @return {@code true} if this type is initialized
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124 */
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125 boolean isInitialized();
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126
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127 /**
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128 * Initializes this type.
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129 */
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130 void initialize();
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131
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132 /**
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133 * Checks whether this type is a subtype of another type.
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134 *
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135 * @param other the type to test
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136 * @return {@code true} if this type a subtype of the specified type
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137 * @see Class#isAssignableFrom(Class)
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138 */
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139 boolean isAssignableTo(ResolvedJavaType other);
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140
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141 /**
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142 * Checks whether the specified object is an instance of this type.
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143 *
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144 * @param obj the object to test
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145 * @return {@code true} if the object is an instance of this type
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146 */
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147 boolean isInstance(Constant obj);
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148
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149 /**
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150 * Returns this type if it is an exact type otherwise returns null.
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151 * This type is exact if it is void, primitive, final, or an array of a final or primitive type.
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152 *
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153 * @return this type if it is exact; {@code null} otherwise
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154 */
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155 ResolvedJavaType asExactType();
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156
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157 /**
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158 * Gets the super class of this type.
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159 * If this type represents either the {@code Object} class, a primitive type, or void, then
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160 * null is returned. If this object represents an array class or an interface then the
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161 * type object representing the {@code Object} class is returned.
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162 */
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163 ResolvedJavaType getSuperclass();
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164
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165 /**
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166 * Gets the interfaces implemented or extended by this type. This method is analogous to {@link Class#getInterfaces()}
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167 * and as such, only returns the interfaces directly implemented or extended by this type.
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168 */
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169 ResolvedJavaType[] getInterfaces();
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170
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171 /**
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172 * Walks the class hierarchy upwards and returns the least common class that is a superclass of both the current and
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173 * the given type.
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174 *
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175 * @return the least common type that is a super type of both the current and the given type, or {@code null} if
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176 * primitive types are involved.
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177 */
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178 ResolvedJavaType findLeastCommonAncestor(ResolvedJavaType otherType);
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179
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180 /**
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181 * Attempts to get a unique concrete subclass of this type.
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182 * <p>
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183 * For an {@linkplain #isArray() array} type A, the unique concrete subclass is A if
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184 * the element type of A is primitive or has no subtype. Otherwise there is no unique concrete subclass.
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185 * <p>
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186 * For a non-array type T, the result is the unique concrete type in the complete hierarchy of T.
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187 * <p>
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188 * A runtime may decide not to manage or walk a large hierarchy and so the result is conservative.
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189 * That is, a non-null result is guaranteed to be the unique concrete class in T's hierarchy
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190 * but a null result does not necessarily imply that there is no unique concrete class in T's hierarchy.
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191 * <p>
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192 * If the compiler uses the result of this method for its compilation, it must register an assumption because
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193 * dynamic class loading can invalidate the result of this method.
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194 *
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195 * @return the unique concrete subclass for this type as described above
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196 */
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197 ResolvedJavaType findUniqueConcreteSubtype();
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198
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199 ResolvedJavaType getComponentType();
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200
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201 ResolvedJavaType getArrayClass();
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202
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203 /**
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204 * Resolves the method implementation for virtual dispatches on objects of this dynamic type.
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205 *
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206 * @param method the method to select the implementation of
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207 * @return the method implementation that would be selected at runtime
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208 */
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209 ResolvedJavaMethod resolveMethod(ResolvedJavaMethod method);
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210
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211 /**
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212 * Given a {@link ResolvedJavaMethod} A, returns a concrete {@link ResolvedJavaMethod} B that is the only possible
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213 * unique target for a virtual call on A(). Returns {@code null} if either no such concrete method or more than one
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214 * such method exists. Returns the method A if A is a concrete method that is not overridden.
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215 * <p>
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216 * If the compiler uses the result of this method for its compilation, it must register an assumption because
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217 * dynamic class loading can invalidate the result of this method.
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218 *
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219 * @param method the method A for which a unique concrete target is searched
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220 * @return the unique concrete target or {@code null} if no such target exists or assumptions are not supported by
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221 * this runtime
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222 */
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223 ResolvedJavaMethod findUniqueConcreteMethod(ResolvedJavaMethod method);
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224
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225 /**
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226 * Returns the instance fields of this class, including {@linkplain ResolvedJavaField#isInternal() internal} fields.
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227 * A zero-length array is returned for array and primitive types. The order of fields returned by this method is
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228 * stable. That is, for a single JVM execution the same order is returned each time this method is called.
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229 *
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230 * @param includeSuperclasses if true, then instance fields for the complete hierarchy of this type are included in the result
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231 * @return an array of instance fields
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232 */
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233 ResolvedJavaField[] getInstanceFields(boolean includeSuperclasses);
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234
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235 /**
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236 * Returns the annotation for the specified type of this class, if such an annotation is present.
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237 *
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238 * @param annotationClass the Class object corresponding to the annotation type
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239 * @return this element's annotation for the specified annotation type if present on this class, else {@code null}
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240 */
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241 <T extends Annotation> T getAnnotation(Class<T> annotationClass);
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242
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243 /**
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244 * Determines if this type is the same as that represented by a given {@link Class}.
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245 */
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246 boolean isClass(Class c);
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247
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248 /**
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249 * Returns the instance field of this class (or one of its super classes) at the given
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250 * offset, or {@code null} if there is no such field.
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251 *
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252 * @param offset the offset of the field to look for
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253 * @return the field with the given offset, or {@code null} if there is no such field.
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254 */
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255 ResolvedJavaField findInstanceFieldWithOffset(long offset);
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256 }