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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/HotSpotSignature.java @ 21526:1da7aef31a08

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created com.oracle.graal.hotspot.jvmci package and moved classes destined for future JVMCI module into it (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Tue, 19 May 2015 23:16:07 +0200
parents graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotSignature.java@082417ac43e4
children
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1 /*
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2 * Copyright (c) 2011, 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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1da7aef31a08 created com.oracle.graal.hotspot.jvmci package and moved classes destined for future JVMCI module into it (JBS:GRAAL-53)
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23 package com.oracle.graal.hotspot.jvmci;
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24
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25 import java.util.*;
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26
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27 import com.oracle.graal.api.meta.*;
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28 import com.oracle.graal.compiler.common.*;
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29 import com.oracle.graal.hotspot.*;
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31 /**
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32 * Represents a method signature.
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33 */
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34 public class HotSpotSignature implements Signature {
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35
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36 private final List<String> parameters = new ArrayList<>();
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37 private final String returnType;
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38 private final String originalString;
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39 private ResolvedJavaType[] parameterTypes;
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40 private ResolvedJavaType returnTypeCache;
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41 private final HotSpotGraalRuntimeProvider runtime;
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42
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43 public HotSpotSignature(HotSpotGraalRuntimeProvider runtime, String signature) {
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44 this.runtime = runtime;
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45 assert signature.length() > 0;
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46 this.originalString = signature;
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47
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48 if (signature.charAt(0) == '(') {
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49 int cur = 1;
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50 while (cur < signature.length() && signature.charAt(cur) != ')') {
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51 int nextCur = parseSignature(signature, cur);
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52 parameters.add(signature.substring(cur, nextCur));
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53 cur = nextCur;
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54 }
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55
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56 cur++;
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57 int nextCur = parseSignature(signature, cur);
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58 returnType = signature.substring(cur, nextCur);
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59 assert nextCur == signature.length();
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60 } else {
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61 returnType = null;
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62 }
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63 }
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64
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65 public HotSpotSignature(HotSpotGraalRuntimeProvider runtime, ResolvedJavaType returnType, ResolvedJavaType... parameterTypes) {
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66 this.runtime = runtime;
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67 this.parameterTypes = parameterTypes.clone();
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68 this.returnTypeCache = returnType;
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69 this.returnType = returnType.getName();
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70 StringBuilder sb = new StringBuilder("(");
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71 for (JavaType type : parameterTypes) {
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72 parameters.add(type.getName());
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73 sb.append(type.getName());
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74 }
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75 sb.append(")").append(returnType.getName());
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76 this.originalString = sb.toString();
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77 assert new HotSpotSignature(runtime, originalString).equals(this);
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78 }
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79
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80 private static int parseSignature(String signature, int start) {
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81 int cur = start;
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82 char first;
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83 do {
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84 first = signature.charAt(cur++);
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85 } while (first == '[');
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86
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87 switch (first) {
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88 case 'L':
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89 while (signature.charAt(cur) != ';') {
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90 cur++;
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91 }
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92 cur++;
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93 break;
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94 case 'V':
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95 case 'I':
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96 case 'B':
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97 case 'C':
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98 case 'D':
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99 case 'F':
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100 case 'J':
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101 case 'S':
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102 case 'Z':
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103 break;
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104 default:
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105 throw new GraalInternalError("Invalid character at index " + cur + " in signature: " + signature);
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106 }
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107 return cur;
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108 }
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109
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110 @Override
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111 public int getParameterCount(boolean withReceiver) {
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112 return parameters.size() + (withReceiver ? 1 : 0);
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113 }
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114
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115 @Override
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116 public Kind getParameterKind(int index) {
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117 return Kind.fromTypeString(parameters.get(index));
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118 }
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119
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120 private static boolean checkValidCache(ResolvedJavaType type, ResolvedJavaType accessingClass) {
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121 assert accessingClass != null;
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122 if (type == null) {
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123 return false;
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124 } else if (type instanceof HotSpotResolvedObjectTypeImpl) {
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125 return ((HotSpotResolvedObjectTypeImpl) type).isDefinitelyResolvedWithRespectTo(accessingClass);
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126 }
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127 return true;
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128 }
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129
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130 private static JavaType getUnresolvedOrPrimitiveType(HotSpotGraalRuntimeProvider runtime, String name) {
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131 if (name.length() == 1) {
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132 Kind kind = Kind.fromPrimitiveOrVoidTypeChar(name.charAt(0));
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133 return runtime.getHostProviders().getMetaAccess().lookupJavaType(kind.toJavaClass());
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134 }
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135 return new HotSpotUnresolvedJavaType(name, runtime);
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136 }
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137
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138 @Override
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139 public JavaType getParameterType(int index, ResolvedJavaType accessingClass) {
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140 if (accessingClass == null) {
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141 // Caller doesn't care about resolution context so return an unresolved
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142 // or primitive type (primitive type resolution is context free)
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143 return getUnresolvedOrPrimitiveType(runtime, parameters.get(index));
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144 }
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145 if (parameterTypes == null) {
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146 parameterTypes = new ResolvedJavaType[parameters.size()];
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147 }
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148
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149 ResolvedJavaType type = parameterTypes[index];
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150 if (!checkValidCache(type, accessingClass)) {
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151 JavaType result = runtime.lookupType(parameters.get(index), (HotSpotResolvedObjectType) accessingClass, false);
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152 if (result instanceof ResolvedJavaType) {
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153 type = (ResolvedJavaType) result;
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154 parameterTypes[index] = type;
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155 } else {
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156 return result;
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157 }
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158 }
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159 return type;
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160 }
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161
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162 @Override
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163 public String toMethodDescriptor() {
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164 assert originalString.equals(Signature.super.toMethodDescriptor());
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165 return originalString;
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166 }
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167
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168 @Override
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169 public Kind getReturnKind() {
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170 return Kind.fromTypeString(returnType);
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171 }
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172
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173 @Override
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174 public JavaType getReturnType(ResolvedJavaType accessingClass) {
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175 if (accessingClass == null) {
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176 // Caller doesn't care about resolution context so return an unresolved
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177 // or primitive type (primitive type resolution is context free)
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178 return getUnresolvedOrPrimitiveType(runtime, returnType);
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179 }
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180 if (!checkValidCache(returnTypeCache, accessingClass)) {
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181 JavaType result = runtime.lookupType(returnType, (HotSpotResolvedObjectType) accessingClass, false);
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182 if (result instanceof ResolvedJavaType) {
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183 returnTypeCache = (ResolvedJavaType) result;
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184 } else {
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185 return result;
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186 }
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187 }
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188 return returnTypeCache;
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189 }
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190
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191 @Override
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192 public String toString() {
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193 return "HotSpotSignature<" + originalString + ">";
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194 }
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195
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196 @Override
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197 public boolean equals(Object obj) {
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198 if (obj instanceof HotSpotSignature) {
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199 HotSpotSignature other = (HotSpotSignature) obj;
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200 if (other.originalString.equals(originalString)) {
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201 assert other.parameters.equals(parameters);
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diff changeset
202 assert other.returnType.equals(returnType);
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diff changeset
203 return true;
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204 }
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205 }
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diff changeset
206 return false;
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207 }
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diff changeset
208
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diff changeset
209 @Override
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diff changeset
210 public int hashCode() {
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diff changeset
211 return originalString.hashCode();
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diff changeset
212 }
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213 }