Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/ResolvedJavaMethod.java @ 24130:0386b21ed2b3
added Services.initializeJVMCI (JDK-8177845)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 18 Apr 2017 17:14:58 +0200 |
parents | 6d2c72b822b0 |
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1 /* |
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2 * Copyright (c) 2009, 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 java.lang.annotation.Annotation; |
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26 import java.lang.reflect.AnnotatedElement; |
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27 import java.lang.reflect.Array; |
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28 import java.lang.reflect.Method; |
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29 import java.lang.reflect.Modifier; |
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30 import java.lang.reflect.Type; |
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31 |
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32 /** |
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33 * Represents a resolved Java method. Methods, like fields and types, are resolved through |
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34 * {@link ConstantPool constant pools}. |
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35 */ |
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36 public interface ResolvedJavaMethod extends JavaMethod, InvokeTarget, ModifiersProvider, AnnotatedElement { |
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37 |
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38 /** |
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39 * Returns the bytecode of this method, if the method has code. The returned byte array does not |
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40 * contain breakpoints or non-Java bytecodes. This may return null if the |
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41 * {@link #getDeclaringClass() holder} is not {@link ResolvedJavaType#isLinked() linked}. |
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42 * |
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43 * The contained constant pool indices may not be the ones found in the original class file but |
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44 * they can be used with the JVMCI API (e.g. methods in {@link ConstantPool}). |
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45 * |
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46 * @return the bytecode of the method, or {@code null} if {@code getCodeSize() == 0} or if the |
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47 * code is not ready. |
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48 */ |
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49 byte[] getCode(); |
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50 |
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51 /** |
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52 * Returns the size of the bytecode of this method, if the method has code. This is equivalent |
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53 * to {@link #getCode()}. {@code length} if the method has code. |
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54 * |
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55 * @return the size of the bytecode in bytes, or 0 if no bytecode is available |
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56 */ |
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57 int getCodeSize(); |
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58 |
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59 /** |
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60 * Returns the {@link ResolvedJavaType} object representing the class or interface that declares |
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61 * this method. |
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62 */ |
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63 ResolvedJavaType getDeclaringClass(); |
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64 |
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65 /** |
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66 * Returns the maximum number of locals used in this method's bytecodes. |
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67 */ |
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68 int getMaxLocals(); |
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69 |
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70 /** |
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71 * Returns the maximum number of stack slots used in this method's bytecodes. |
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72 */ |
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73 int getMaxStackSize(); |
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74 |
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75 default boolean isFinal() { |
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76 return ModifiersProvider.super.isFinalFlagSet(); |
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77 } |
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78 |
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79 /** |
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80 * Determines if this method is a synthetic method as defined by the Java Language |
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81 * Specification. |
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82 */ |
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83 boolean isSynthetic(); |
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84 |
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85 /** |
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86 * Checks that the method is a |
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87 * <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.6">varargs</a> |
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88 * method. |
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89 * |
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90 * @return whether the method is a varargs method |
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91 */ |
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92 boolean isVarArgs(); |
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93 |
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94 /** |
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95 * Checks that the method is a |
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96 * <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.6">bridge</a> |
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97 * method. |
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98 * |
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99 * @return whether the method is a bridge method |
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100 */ |
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101 boolean isBridge(); |
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102 |
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103 /** |
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104 * Returns {@code true} if this method is a default method; returns {@code false} otherwise. |
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105 * |
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106 * A default method is a public non-abstract instance method, that is, a non-static method with |
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107 * a body, declared in an interface type. |
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108 * |
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109 * @return true if and only if this method is a default method as defined by the Java Language |
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110 * Specification. |
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111 */ |
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112 boolean isDefault(); |
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113 |
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114 /** |
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115 * Checks whether this method is a class initializer. |
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116 * |
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117 * @return {@code true} if the method is a class initializer |
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118 */ |
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119 boolean isClassInitializer(); |
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120 |
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121 /** |
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122 * Checks whether this method is a constructor. |
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123 * |
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124 * @return {@code true} if the method is a constructor |
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125 */ |
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126 boolean isConstructor(); |
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127 |
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128 /** |
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129 * Checks whether this method can be statically bound (usually, that means it is final or |
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130 * private or static, but not abstract, or the declaring class is final). |
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131 * |
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132 * @return {@code true} if this method can be statically bound |
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133 */ |
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134 boolean canBeStaticallyBound(); |
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135 |
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136 /** |
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137 * Returns the list of exception handlers for this method. |
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138 */ |
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139 ExceptionHandler[] getExceptionHandlers(); |
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140 |
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141 /** |
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142 * Returns a stack trace element for this method and a given bytecode index. |
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143 */ |
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144 StackTraceElement asStackTraceElement(int bci); |
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145 |
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146 /** |
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147 * Returns an object that provides access to the profiling information recorded for this method. |
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148 */ |
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149 default ProfilingInfo getProfilingInfo() { |
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150 return getProfilingInfo(true, true); |
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151 } |
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152 |
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153 /** |
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154 * Returns an object that provides access to the profiling information recorded for this method. |
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155 * |
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156 * @param includeNormal if true, |
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157 * {@linkplain ProfilingInfo#getDeoptimizationCount(DeoptimizationReason) |
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158 * deoptimization counts} will include deoptimization that happened during execution |
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159 * of standard non-osr methods. |
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160 * @param includeOSR if true, |
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161 * {@linkplain ProfilingInfo#getDeoptimizationCount(DeoptimizationReason) |
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162 * deoptimization counts} will include deoptimization that happened during execution |
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163 * of on-stack-replacement methods. |
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164 */ |
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165 ProfilingInfo getProfilingInfo(boolean includeNormal, boolean includeOSR); |
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166 |
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167 /** |
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168 * Invalidates the profiling information and restarts profiling upon the next invocation. |
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169 */ |
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170 void reprofile(); |
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171 |
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172 /** |
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173 * Returns the constant pool of this method. |
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174 */ |
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175 ConstantPool getConstantPool(); |
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176 |
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177 /** |
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178 * A {@code Parameter} provides information about method parameters. |
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179 */ |
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180 class Parameter implements AnnotatedElement { |
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181 private final String name; |
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182 private final ResolvedJavaMethod method; |
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183 private final int modifiers; |
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184 private final int index; |
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185 |
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186 /** |
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187 * Constructor for {@code Parameter}. |
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188 * |
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189 * @param name the name of the parameter or {@code null} if there is no |
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190 * {@literal MethodParameters} class file attribute providing a non-empty name |
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191 * for the parameter |
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192 * @param modifiers the modifier flags for the parameter |
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193 * @param method the method which defines this parameter |
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194 * @param index the index of the parameter |
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195 */ |
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196 public Parameter(String name, |
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197 int modifiers, |
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198 ResolvedJavaMethod method, |
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199 int index) { |
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200 assert name == null || !name.isEmpty(); |
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201 this.name = name; |
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202 this.modifiers = modifiers; |
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203 this.method = method; |
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204 this.index = index; |
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205 } |
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206 |
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207 /** |
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208 * Gets the name of the parameter. If the parameter's name is {@linkplain #isNamePresent() |
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209 * present}, then this method returns the name provided by the class file. Otherwise, this |
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210 * method synthesizes a name of the form argN, where N is the index of the parameter in the |
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211 * descriptor of the method which declares the parameter. |
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212 * |
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213 * @return the name of the parameter, either provided by the class file or synthesized if |
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214 * the class file does not provide a name |
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215 */ |
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216 public String getName() { |
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217 if (name == null) { |
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218 return "arg" + index; |
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219 } else { |
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220 return name; |
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221 } |
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222 } |
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223 |
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224 /** |
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225 * Gets the method declaring the parameter. |
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226 */ |
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227 public ResolvedJavaMethod getDeclaringMethod() { |
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228 return method; |
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229 } |
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230 |
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231 /** |
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232 * Get the modifier flags for the parameter. |
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233 */ |
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234 public int getModifiers() { |
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235 return modifiers; |
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236 } |
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237 |
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238 /** |
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239 * Gets the kind of the parameter. |
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240 */ |
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241 public JavaKind getKind() { |
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242 return method.getSignature().getParameterKind(index); |
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243 } |
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244 |
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245 /** |
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246 * Gets the formal type of the parameter. |
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247 */ |
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248 public Type getParameterizedType() { |
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249 return method.getGenericParameterTypes()[index]; |
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250 } |
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251 |
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252 /** |
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253 * Gets the type of the parameter. |
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254 */ |
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255 public JavaType getType() { |
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256 return method.getSignature().getParameterType(index, method.getDeclaringClass()); |
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257 } |
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258 |
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259 /** |
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260 * Determines if the parameter has a name according to a {@literal MethodParameters} class |
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261 * file attribute. |
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262 * |
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263 * @return true if and only if the parameter has a name according to the class file. |
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264 */ |
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265 public boolean isNamePresent() { |
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266 return name != null; |
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267 } |
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268 |
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269 /** |
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270 * Determines if the parameter represents a variable argument list. |
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271 */ |
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272 public boolean isVarArgs() { |
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273 return method.isVarArgs() && index == method.getSignature().getParameterCount(false) - 1; |
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274 } |
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275 |
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276 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { |
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277 return method.getParameterAnnotations(annotationClass)[index]; |
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278 } |
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279 |
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280 public Annotation[] getAnnotations() { |
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281 return method.getParameterAnnotations()[index]; |
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282 } |
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283 |
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284 public Annotation[] getDeclaredAnnotations() { |
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285 return getAnnotations(); |
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286 } |
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287 |
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288 @Override |
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289 public String toString() { |
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290 Type type = getParameterizedType(); |
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291 String typename = type.getTypeName(); |
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292 if (isVarArgs()) { |
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293 typename = typename.replaceFirst("\\[\\]$", "..."); |
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294 } |
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295 |
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296 final StringBuilder sb = new StringBuilder(Modifier.toString(getModifiers())); |
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297 if (sb.length() != 0) { |
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298 sb.append(' '); |
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299 } |
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300 return sb.append(typename).append(' ').append(getName()).toString(); |
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301 } |
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302 |
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303 @Override |
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304 public boolean equals(Object obj) { |
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305 if (obj instanceof Parameter) { |
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306 Parameter other = (Parameter) obj; |
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307 return (other.method.equals(method) && other.index == index); |
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308 } |
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309 return false; |
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310 } |
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311 |
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312 @Override |
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313 public int hashCode() { |
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314 return method.hashCode() ^ index; |
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315 } |
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316 } |
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317 |
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318 /** |
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319 * Returns an array of {@code Parameter} objects that represent all the parameters to this |
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320 * method. Returns an array of length 0 if this method has no parameters. Returns {@code null} |
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321 * if the parameter information is unavailable. |
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322 */ |
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323 default Parameter[] getParameters() { |
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324 return null; |
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325 } |
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326 |
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327 /** |
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328 * Returns an array of arrays that represent the annotations on the formal parameters, in |
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329 * declaration order, of this method. |
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330 * |
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331 * @see Method#getParameterAnnotations() |
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332 */ |
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333 Annotation[][] getParameterAnnotations(); |
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334 |
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335 /** |
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336 * Returns an array of {@link Type} objects that represent the formal parameter types, in |
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337 * declaration order, of this method. |
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338 * |
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339 * @see Method#getGenericParameterTypes() |
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340 */ |
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341 Type[] getGenericParameterTypes(); |
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342 |
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343 /** |
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344 * Returns {@code true} if this method is not excluded from inlining and has associated Java |
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345 * bytecodes (@see {@link ResolvedJavaMethod#hasBytecodes()}). |
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346 */ |
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347 boolean canBeInlined(); |
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348 |
14520 | 349 /** |
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350 * Determines if this method is targeted by a VM directive (e.g., |
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351 * {@code -XX:CompileCommand=dontinline,<pattern>}) or VM recognized annotation (e.g., |
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352 * {@code jdk.internal.vm.annotation.DontInline}) that specifies it should not be inlined. |
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353 */ |
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354 boolean hasNeverInlineDirective(); |
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355 |
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356 /** |
14520 | 357 * Returns {@code true} if the inlining of this method should be forced. |
358 */ | |
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359 boolean shouldBeInlined(); |
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360 |
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361 /** |
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362 * Returns the LineNumberTable of this method or null if this method does not have a line |
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363 * numbers table. |
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364 */ |
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365 LineNumberTable getLineNumberTable(); |
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366 |
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367 /** |
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368 * Returns the local variable table of this method or null if this method does not have a local |
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369 * variable table. |
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370 */ |
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371 LocalVariableTable getLocalVariableTable(); |
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372 |
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373 /** |
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374 * Gets the encoding of (that is, a constant representing the value of) this method. |
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375 * |
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376 * @return a constant representing a reference to this method |
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377 */ |
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378 Constant getEncoding(); |
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379 |
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380 /** |
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381 * Checks if this method is present in the virtual table for subtypes of the specified |
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382 * {@linkplain ResolvedJavaType type}. |
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383 * |
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384 * @return true is this method is present in the virtual table for subtypes of this type. |
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385 */ |
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386 boolean isInVirtualMethodTable(ResolvedJavaType resolved); |
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387 |
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388 /** |
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389 * Gets the annotation of a particular type for a formal parameter of this method. |
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390 * |
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391 * @param annotationClass the Class object corresponding to the annotation type |
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392 * @param parameterIndex the index of a formal parameter of {@code method} |
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393 * @return the annotation of type {@code annotationClass} for the formal parameter present, else |
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394 * null |
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395 * @throws IndexOutOfBoundsException if {@code parameterIndex} does not denote a formal |
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396 * parameter |
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397 */ |
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398 default <T extends Annotation> T getParameterAnnotation(Class<T> annotationClass, int parameterIndex) { |
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399 if (parameterIndex >= 0) { |
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400 Annotation[][] parameterAnnotations = getParameterAnnotations(); |
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401 for (Annotation a : parameterAnnotations[parameterIndex]) { |
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402 if (a.annotationType() == annotationClass) { |
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403 return annotationClass.cast(a); |
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404 } |
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405 } |
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406 } |
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407 return null; |
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408 } |
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409 |
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410 default JavaType[] toParameterTypes() { |
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411 JavaType receiver = isStatic() || isConstructor() ? null : getDeclaringClass(); |
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412 return getSignature().toParameterTypes(receiver); |
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413 } |
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414 |
16488
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415 /** |
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416 * Gets the annotations of a particular type for the formal parameters of this method. |
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417 * |
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418 * @param annotationClass the Class object corresponding to the annotation type |
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419 * @return the annotation of type {@code annotationClass} (if any) for each formal parameter |
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420 * present |
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421 */ |
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422 @SuppressWarnings("unchecked") |
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423 default <T extends Annotation> T[] getParameterAnnotations(Class<T> annotationClass) { |
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424 Annotation[][] parameterAnnotations = getParameterAnnotations(); |
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425 T[] result = (T[]) Array.newInstance(annotationClass, parameterAnnotations.length); |
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426 for (int i = 0; i < parameterAnnotations.length; i++) { |
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427 for (Annotation a : parameterAnnotations[i]) { |
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428 if (a.annotationType() == annotationClass) { |
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429 result[i] = annotationClass.cast(a); |
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430 } |
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431 } |
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432 } |
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433 return result; |
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434 } |
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435 |
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436 /** |
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437 * Checks whether the method has bytecodes associated with it. Methods without bytecodes are |
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438 * either abstract or native methods. |
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439 * |
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440 * @return whether the definition of this method is Java bytecodes |
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441 */ |
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442 default boolean hasBytecodes() { |
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443 return isConcrete() && !isNative(); |
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444 } |
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445 |
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446 /** |
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447 * Checks whether the method has a receiver parameter - i.e., whether it is not static. |
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448 * |
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449 * @return whether the method has a receiver parameter |
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450 */ |
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451 default boolean hasReceiver() { |
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452 return !isStatic(); |
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453 } |
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454 |
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455 /** |
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456 * Determines if this method is {@link java.lang.Object#Object()}. |
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457 */ |
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458 default boolean isJavaLangObjectInit() { |
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459 return getDeclaringClass().isJavaLangObject() && getName().equals("<init>"); |
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460 } |
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461 |
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462 SpeculationLog getSpeculationLog(); |
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463 } |