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annotate graal/com.oracle.max.graal.debug/src/com/oracle/max/graal/debug/internal/DebugScope.java @ 4357:719ac1d92a52

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More work on debug framework.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Fri, 20 Jan 2012 14:58:51 +0100
parents 043bec543161
children 18b52fec79f1
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.max.graal.debug.internal;
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24
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25 import java.io.*;
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26 import java.util.*;
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27 import java.util.concurrent.*;
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28
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29 import com.oracle.max.graal.debug.*;
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30
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31
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32 public final class DebugScope {
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33
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34 private static ThreadLocal<DebugScope> instance = new ThreadLocal<>();
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35 private static ThreadLocal<DebugConfig> config = new ThreadLocal<>();
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36
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37 private final String name;
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38 private final DebugScope parent;
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39
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40 private Object[] context;
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41
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42 private List<DebugScope> children;
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43 private DebugValueMap valueMap;
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44 private String qualifiedName;
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45
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46 public static final DebugScope DEFAULT_CONTEXT = new DebugScope("DEFAULT", "DEFAULT", null);
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47 private static final char SCOPE_SEP = '.';
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48
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49 private boolean logEnabled;
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50 private boolean meterEnabled;
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51 private boolean timerEnabled;
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52 private boolean dumpEnabled;
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53
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54 public static DebugScope getInstance() {
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55 DebugScope result = instance.get();
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56 if (result == null) {
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57 instance.set(new DebugScope("DEFAULT", "DEFAULT", null));
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58 return instance.get();
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59 } else {
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60 return result;
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61 }
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62 }
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63
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64 public static DebugConfig getConfig() {
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65 return config.get();
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66 }
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67
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68 private DebugScope(String name, String qualifiedName, DebugScope parent, Object... context) {
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69 this.name = name;
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70 this.parent = parent;
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71 this.context = context;
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72 this.qualifiedName = qualifiedName;
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73 }
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74
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75 public boolean isDumpEnabled() {
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76 return dumpEnabled;
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77 }
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78
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79 public boolean isLogEnabled() {
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80 return logEnabled;
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81 }
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82
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83 public boolean isMeterEnabled() {
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84 return meterEnabled;
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85 }
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86
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87 public boolean isTimerEnabled() {
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88 return timerEnabled;
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89 }
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90
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91 public void log(String msg, Object... args) {
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92 if (isLogEnabled()) {
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93 cachedOut.println(String.format(msg, args));
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94 }
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95 }
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96
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97 public void dump(Object object, String msg, Object[] args) {
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98 }
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99
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100 public <T> T scope(String newName, Runnable runnable, Callable<T> callable, boolean sandbox, Object[] newContext) {
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101 DebugScope oldContext = getInstance();
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102 DebugConfig oldConfig = getConfig();
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103 DebugScope newChild = null;
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104 if (sandbox) {
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105 newChild = new DebugScope(newName, newName, null, newContext);
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106 setConfig(null);
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107 } else {
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108 newChild = oldContext.createChild(newName, newContext);
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109 }
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110 instance.set(newChild);
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111 T result = null;
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112 updateFlags();
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113 log("Starting scope %s", newChild.getQualifiedName());
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114 try {
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115 if (runnable != null) {
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116 runnable.run();
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117 }
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118 if (callable != null) {
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119 result = call(callable);
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120 }
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121 } catch (RuntimeException e) {
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122 throw interceptException(e);
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123 } finally {
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124 newChild.deactivate();
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125 instance.set(oldContext);
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126 setConfig(oldConfig);
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127 }
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128 return result;
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129 }
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130
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131 private void updateFlags() {
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132 DebugConfig config = getConfig();
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133 if (config == null) {
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134 logEnabled = false;
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135 meterEnabled = false;
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136 timerEnabled = false;
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137 dumpEnabled = false;
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138 } else {
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139 logEnabled = config.isLogEnabled();
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140 meterEnabled = config.isMeterEnabled();
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141 timerEnabled = config.isTimerEnabled();
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142 dumpEnabled = config.isDumpEnabled();
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143 }
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144 }
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145
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146 private void deactivate() {
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147 context = null;
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148 }
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149
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150 private RuntimeException interceptException(RuntimeException e) {
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151 return e;
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152 }
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153
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154 private DebugValueMap getValueMap() {
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155 if (valueMap == null) {
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156 valueMap = new DebugValueMap();
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157 }
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158 return valueMap;
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159 }
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160
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161 long getCurrentValue(int index) {
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162 return getValueMap().getCurrentValue(index);
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163 }
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164
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165 void setCurrentValue(int index, long l) {
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166 getValueMap().setCurrentValue(index, l);
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167 }
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168
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169 private DebugScope createChild(String newName, Object[] newContext) {
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170 String newQualifiedName = this.qualifiedName + SCOPE_SEP + newName;
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171 DebugScope result = new DebugScope(newName, newQualifiedName, this, newContext);
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172 if (children == null) {
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173 children = new ArrayList<>(4);
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174 }
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175 children.add(result);
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176 return result;
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177 }
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178
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179 public Iterable<Object> getCurrentContext() {
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180 return new Iterable<Object>() {
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181
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182 @Override
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183 public Iterator<Object> iterator() {
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184 return new Iterator<Object>() {
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185
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186 DebugScope currentScope = DebugScope.this;
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187 int objectIndex;
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188
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189 @Override
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190 public boolean hasNext() {
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191 selectScope();
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192 return currentScope != null;
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193 }
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194
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195 private void selectScope() {
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196 while (currentScope != null && currentScope.context.length <= objectIndex) {
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197 currentScope = currentScope.parent;
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198 objectIndex = 0;
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199 }
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200 }
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201
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202 @Override
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203 public Object next() {
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204 selectScope();
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205 if (currentScope != null) {
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206 return currentScope.context[objectIndex++];
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207 }
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208 throw new IllegalStateException("May only be called if there is a next element.");
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209 }
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210
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211 @Override
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212 public void remove() {
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213 throw new UnsupportedOperationException("This iterator is read only.");
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214 }
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215 };
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216 }
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217 };
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218 }
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219
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220 public static <T> T call(Callable<T> callable) {
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221 try {
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222 return callable.call();
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223 } catch (Exception e) {
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224 if (e instanceof RuntimeException) {
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225 throw (RuntimeException) e;
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226 } else {
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227 throw new RuntimeException(e);
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228 }
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229 }
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230 }
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231
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232 public void setConfig(DebugConfig newConfig) {
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233 config.set(newConfig);
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234 updateFlags();
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235 }
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236
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237 public String getQualifiedName() {
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238 return qualifiedName;
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239 }
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240
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241 public static PrintStream cachedOut;
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242
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243 public static void initialize() {
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244 cachedOut = System.out;
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245 }
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246 }
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247