1 /* |
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2 * Copyright (c) 2016, 2018, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package jdk.jfr.internal.cmd; |
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27 |
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28 import java.io.IOException; |
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29 import java.io.PrintWriter; |
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30 import java.nio.file.Path; |
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31 |
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32 import jdk.jfr.EventType; |
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33 import jdk.jfr.ValueDescriptor; |
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34 import jdk.jfr.consumer.RecordedEvent; |
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35 import jdk.jfr.consumer.RecordedObject; |
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36 import jdk.jfr.consumer.RecordingFile; |
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37 |
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38 final class JSONWriter extends StructuredWriter { |
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39 |
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40 public JSONWriter(PrintWriter writer) { |
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41 super(writer); |
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42 } |
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43 |
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44 public void print(Path source) throws IOException { |
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45 try (RecordingFile es = new RecordingFile(source)) { |
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46 printObjectBegin(); |
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47 printRecording(es); |
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48 printObjectEnd(); |
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49 flush(); |
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50 } |
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51 } |
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52 |
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53 private void printRecording(RecordingFile es) throws IOException { |
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54 printDataStructureName("recording"); |
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55 printObjectBegin(); |
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56 printEvents(es); |
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57 printObjectEnd(); |
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58 } |
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59 |
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60 private void printEvents(RecordingFile es) throws IOException { |
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61 printDataStructureName("events"); |
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62 printArrayBegin(); |
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63 boolean first = true; |
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64 while (es.hasMoreEvents()) { |
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65 RecordedEvent e = es.readEvent(); |
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66 printNewDataStructure(first, true, null); |
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67 printEvent(e); |
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68 flush(); |
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69 first = false; |
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70 } |
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71 printArrayEnd(); |
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72 } |
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73 |
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74 private void printEvent(RecordedEvent e) { |
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75 printObjectBegin(); |
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76 EventType type = e.getEventType(); |
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77 printValue(true, false, "name", type.getName()); |
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78 printValue(false, false, "typeId", type.getId()); |
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79 printValue(false, false, "startTime", e.getStartTime()); |
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80 printValue(false, false, "duration", e.getDuration()); |
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81 printNewDataStructure(false, false, "values"); |
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82 printObject(e); |
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83 printObjectEnd(); |
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84 } |
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85 |
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86 void printValue(boolean first, boolean arrayElement, String name, Object value) { |
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87 printNewDataStructure(first, arrayElement, name); |
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88 if (!printIfNull(value)) { |
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89 if (value instanceof Boolean) { |
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90 printAsString(value); |
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91 return; |
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92 } |
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93 if (value instanceof Double) { |
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94 Double dValue = (Double) value; |
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95 if (Double.isNaN(dValue) || Double.isInfinite(dValue)) { |
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96 printNull(); |
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97 return; |
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98 } |
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99 printAsString(value); |
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100 return; |
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101 } |
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102 if (value instanceof Float) { |
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103 Float fValue = (Float) value; |
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104 if (Float.isNaN(fValue) || Float.isInfinite(fValue)) { |
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105 printNull(); |
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106 return; |
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107 } |
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108 printAsString(value); |
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109 return; |
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110 } |
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111 if (value instanceof Number) { |
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112 printAsString(value); |
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113 return; |
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114 } |
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115 print("\""); |
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116 printEscaped(String.valueOf(value)); |
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117 print("\""); |
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118 } |
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119 } |
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120 |
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121 public void printObject(RecordedObject object) { |
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122 printObjectBegin(); |
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123 boolean first = true; |
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124 for (ValueDescriptor v : object.getFields()) { |
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125 printValueDescriptor(first, false, v, object.getValue(v.getName())); |
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126 first = false; |
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127 } |
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128 printObjectEnd(); |
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129 } |
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130 |
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131 private void printArray(ValueDescriptor v, Object[] array) { |
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132 printArrayBegin(); |
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133 boolean first = true; |
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134 for (Object arrayElement : array) { |
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135 printValueDescriptor(first, true, v, arrayElement); |
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136 first = false; |
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137 } |
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138 printArrayEnd(); |
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139 } |
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140 |
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141 private void printValueDescriptor(boolean first, boolean arrayElement, ValueDescriptor vd, Object value) { |
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142 if (vd.isArray() && !arrayElement) { |
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143 printNewDataStructure(first, arrayElement, vd.getName()); |
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144 if (!printIfNull(value)) { |
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145 printArray(vd, (Object[]) value); |
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146 } |
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147 return; |
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148 } |
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149 if (!vd.getFields().isEmpty()) { |
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150 printNewDataStructure(first, arrayElement, vd.getName()); |
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151 if (!printIfNull(value)) { |
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152 printObject((RecordedObject) value); |
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153 } |
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154 return; |
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155 } |
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156 printValue(first, arrayElement, vd.getName(), value); |
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157 } |
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158 |
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159 private void printNewDataStructure(boolean first, boolean arrayElement, String name) { |
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160 if (!first) { |
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161 print(", "); |
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162 if (!arrayElement) { |
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163 println(); |
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164 } |
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165 } |
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166 if (!arrayElement) { |
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167 printDataStructureName(name); |
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168 } |
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169 } |
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170 |
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171 private boolean printIfNull(Object value) { |
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172 if (value == null) { |
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173 printNull(); |
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174 return true; |
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175 } |
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176 return false; |
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177 } |
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178 |
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179 private void printNull() { |
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180 print("null"); |
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181 } |
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182 |
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183 private void printDataStructureName(String text) { |
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184 printIndent(); |
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185 print("\""); |
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186 print(text); |
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187 print("\": "); |
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188 } |
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189 |
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190 private void printObjectEnd() { |
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191 retract(); |
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192 println(); |
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193 printIndent(); |
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194 print("}"); |
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195 } |
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196 |
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197 private void printObjectBegin() { |
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198 println("{"); |
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199 indent(); |
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200 } |
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201 |
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202 private void printArrayEnd() { |
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203 print("]"); |
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204 } |
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205 |
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206 private void printArrayBegin() { |
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207 print("["); |
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208 } |
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209 |
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210 private void printEscaped(String text) { |
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211 for (int i = 0; i < text.length(); i++) { |
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212 printEscaped(text.charAt(i)); |
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213 } |
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214 } |
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215 |
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216 private void printEscaped(char c) { |
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217 if (c == '\b') { |
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218 print("\\b"); |
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219 return; |
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220 } |
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221 if (c == '\n') { |
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222 print("\\n"); |
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223 return; |
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224 } |
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225 if (c == '\t') { |
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226 print("\\t"); |
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227 return; |
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228 } |
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229 if (c == '\f') { |
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230 print("\\f"); |
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231 return; |
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232 } |
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233 if (c == '\r') { |
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234 print("\\r"); |
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235 return; |
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236 } |
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237 if (c == '\"') { |
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238 print("\\\""); |
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239 return; |
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240 } |
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241 if (c == '\\') { |
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242 print("\\\\"); |
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243 return; |
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244 } |
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245 if (c == '/') { |
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246 print("\\/"); |
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247 return; |
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248 } |
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249 if (c > 0x7F || c < 32) { |
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250 print("\\u"); |
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251 // 0x10000 will pad with zeros. |
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252 print(Integer.toHexString(0x10000 + (int) c).substring(1)); |
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253 return; |
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254 } |
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255 print(c); |
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256 } |
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257 |
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258 } |
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