Mercurial > hg > truffle
annotate test/runtime/6925573/SortMethodsTest.java @ 11517:1f03076a121b
Merge
author | Mick Jordan <mick.jordan@oracle.com> |
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date | Tue, 03 Sep 2013 14:09:56 -0700 |
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 } |