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annotate test/runtime/6925573/SortMethodsTest.java @ 4225:339cf8d4904d

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Made mx.run work properly when stderr is redirected to stdout. Made outputparser redirect stderr to stdout. Added copyright headers to outputparser.py and sanitycheck.py. Reverted class path construction in mx.build() to use includeSelf=True to fix regression when running 'mx build -c'.
author Doug Simon <doug.simon@oracle.com>
date Thu, 05 Jan 2012 11:31:46 +0100
parents c18cbe5936b8
children 4510a3502166
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1 /*
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2 * Copyright (c) 2008, 2010, 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 */
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24
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25 import java.io.ByteArrayOutputStream;
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26 import java.io.IOException;
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27 import java.io.OutputStream;
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28 import java.io.PrintWriter;
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29 import java.io.StringWriter;
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30
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31 import java.lang.reflect.Method;
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32 import java.net.URI;
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33 import java.util.Arrays;
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34 import java.util.Vector;
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35
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36 import javax.tools.Diagnostic;
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37 import javax.tools.DiagnosticCollector;
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38 import javax.tools.FileObject;
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39 import javax.tools.ForwardingJavaFileManager;
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40 import javax.tools.JavaCompiler;
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41 import javax.tools.JavaCompiler.CompilationTask;
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42 import javax.tools.JavaFileManager;
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43 import javax.tools.JavaFileObject;
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44 import javax.tools.JavaFileObject.Kind;
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45 import javax.tools.SimpleJavaFileObject;
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46 import javax.tools.StandardJavaFileManager;
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47 import javax.tools.ToolProvider;
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48
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49 /*
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50 * @test SortMethodsTest
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51 * @bug 6925573
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52 * @summary verify that class loading does not need quadratic time with regard to the number of class
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53 methods.
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54 * @run main SortMethodsTest
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55 * @author volker.simonis@gmail.com
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56 */
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57
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58 public class SortMethodsTest {
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59
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60 static String createClass(String name, int nrOfMethods) {
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61 StringWriter sw = new StringWriter();
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62 PrintWriter pw = new PrintWriter(sw);
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63 pw.println("public class " + name + "{");
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64 for (int i = 0; i < nrOfMethods; i++) {
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65 pw.println(" public void m" + i + "() {}");
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66 }
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67 pw.println(" public static String sayHello() {");
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68 pw.println(" return \"Hello from class \" + " + name +
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69 ".class.getName() + \" with \" + " + name +
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70 ".class.getDeclaredMethods().length + \" methods\";");
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71 pw.println(" }");
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72 pw.println("}");
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73 pw.close();
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74 return sw.toString();
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75 }
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76
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77 public static void main(String args[]) {
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78
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79 JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
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80 DiagnosticCollector<JavaFileObject> diags = new DiagnosticCollector<JavaFileObject>();
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81 final String cName = new String("ManyMethodsClass");
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82 Vector<Long> results = new Vector<Long>();
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83
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84 for (int i = 6; i < 600000; i*=10) {
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85 String klass = createClass(cName, i);
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86 JavaMemoryFileObject file = new JavaMemoryFileObject(cName, klass);
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87 MemoryFileManager mfm = new MemoryFileManager(comp.getStandardFileManager(diags, null, null), file);
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88 CompilationTask task = comp.getTask(null, mfm, diags, null, null, Arrays.asList(file));
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89
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90 if (task.call()) {
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91 try {
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92 MemoryClassLoader mcl = new MemoryClassLoader(file);
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93 long start = System.nanoTime();
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94 Class<? extends Object> c = Class.forName(cName, true, mcl);
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95 long end = System.nanoTime();
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96 results.add(end - start);
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97 Method m = c.getDeclaredMethod("sayHello", new Class[0]);
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98 String ret = (String)m.invoke(null, new Object[0]);
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99 System.out.println(ret + " (loaded and resloved in " + (end - start) + "ns)");
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100 } catch (Exception e) {
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101 System.err.println(e);
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102 }
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103 }
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104 else {
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105 System.out.println(klass);
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106 System.out.println();
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107 for (Diagnostic diag : diags.getDiagnostics()) {
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108 System.out.println(diag.getCode() + "\n" + diag.getKind() + "\n" + diag.getPosition());
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109 System.out.println(diag.getSource() + "\n" + diag.getMessage(null));
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110 }
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111 }
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112 }
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113
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114 long lastRatio = 0;
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115 for (int i = 2; i < results.size(); i++) {
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116 long normalized1 = Math.max(results.get(i-1) - results.get(0), 1);
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117 long normalized2 = Math.max(results.get(i) - results.get(0), 1);
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118 long ratio = normalized2/normalized1;
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119 lastRatio = ratio;
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120 System.out.println("10 x more methods requires " + ratio + " x more time");
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121 }
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122 // The following is just vague estimation but seems to work on current x86_64 and sparcv9 machines
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123 if (lastRatio > 80) {
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124 throw new RuntimeException("ATTENTION: it seems that class loading needs quadratic time with regard to the number of class methods!!!");
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125 }
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126 }
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127 }
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128
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129 class JavaMemoryFileObject extends SimpleJavaFileObject {
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130
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131 private final String code;
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132 private ByteArrayOutputStream byteCode;
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133
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134 JavaMemoryFileObject(String name, String code) {
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135 super(URI.create("string:///" + name.replace('.','/') + Kind.SOURCE.extension), Kind.SOURCE);
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136 this.code = code;
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137 }
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138
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139 @Override
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140 public CharSequence getCharContent(boolean ignoreEncodingErrors) {
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141 return code;
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142 }
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143
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144 @Override
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145 public OutputStream openOutputStream() {
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146 byteCode = new ByteArrayOutputStream();
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147 return byteCode;
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148 }
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149
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150 byte[] getByteCode() {
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151 return byteCode.toByteArray();
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152 }
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153 }
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154
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155 class MemoryClassLoader extends ClassLoader {
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156
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157 private final JavaMemoryFileObject jfo;
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158
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159 public MemoryClassLoader(JavaMemoryFileObject jfo) {
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160 this.jfo = jfo;
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161 }
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162
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163 public Class findClass(String name) {
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164 byte[] b = jfo.getByteCode();
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165 return defineClass(name, b, 0, b.length);
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166 }
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167 }
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168
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169 class MemoryFileManager extends ForwardingJavaFileManager<JavaFileManager> {
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170
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171 private final JavaFileObject jfo;
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172
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173 public MemoryFileManager(StandardJavaFileManager jfm, JavaFileObject jfo) {
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174 super(jfm);
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175 this.jfo = jfo;
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176 }
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177
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178 @Override
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179 public FileObject getFileForInput(Location location, String packageName,
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180 String relativeName) throws IOException {
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181 return jfo;
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182 }
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183
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184 @Override
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185 public JavaFileObject getJavaFileForOutput(Location location, String qualifiedName,
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186 Kind kind, FileObject outputFile) throws IOException {
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187 return jfo;
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188 }
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189
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190 }