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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/JSONHelper.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 9c8c0937da41
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * Copyright (c) 2013, 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 package com.oracle.truffle.api.utilities;
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26
22157
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27 import com.oracle.truffle.api.nodes.Node;
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28 import com.oracle.truffle.api.source.SourceSection;
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29 import java.util.ArrayList;
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30 import java.util.LinkedHashMap;
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31 import java.util.List;
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32 import java.util.Map;
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33
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34 /**
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35 * Helper function that allows to dump the AST during creation to a JSON format.
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36 */
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37 public class JSONHelper {
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38
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39 private static StringBuilder AstJsonDumpBuilder = new StringBuilder();
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40
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41 public static void dumpNewChild(Node parentNode, Node childNode) {
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42 if (AstJsonDumpBuilder != null) {
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43 AstJsonDumpBuilder.append("{ \"action\": \"insertNode\", \"parentId\": \"" + getID(parentNode) + "\", \"newId\": \"" + getID(childNode) + "\" },\n");
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44 }
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45 }
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46
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47 public static void dumpReplaceChild(Node oldNode, Node newNode, CharSequence reason) {
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48 if (AstJsonDumpBuilder != null) {
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49 AstJsonDumpBuilder.append("{ \"action\": \"replaceNode\", \"oldId\": \"" + getID(oldNode) + "\", \"newId\": \"" + getID(newNode) + "\", \"reason\": " + quote(reason) + " },\n");
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50 }
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51 }
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52
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53 public static void dumpNewNode(Node newNode) {
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54 if (AstJsonDumpBuilder != null) {
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55 AstJsonDumpBuilder.append("{ \"action\": \"createNode\", \"newId\": \"" + getID(newNode) + "\", \"type\": \"" + getType(newNode) + "\", \"description\": \"" + newNode.getDescription() +
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56 "\", \"language\": \"" + newNode.getLanguage() + "\"" + getSourceSectionInfo(newNode) + " },\n");
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57 }
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58 }
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59
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60 private static String getSourceSectionInfo(Node newNode) {
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61 SourceSection sourceSection = newNode.getSourceSection();
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62 if (sourceSection != null) {
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63 return ", \"identifier\": \"" + sourceSection.getIdentifier() + "\" ";
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64 } else {
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65 return "";
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66 }
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67 }
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68
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69 public static String getResult() {
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70 return AstJsonDumpBuilder.toString();
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71 }
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72
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73 private static String getID(Node newChild) {
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74 return String.valueOf(newChild.hashCode());
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75 }
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76
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77 private static String getType(Node node) {
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78 return node.getClass().getSimpleName();
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79 }
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80
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81 private static String quote(CharSequence value) {
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82 StringBuilder builder = new StringBuilder(value.length() + 2);
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83 builder.append('"');
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84 for (int i = 0; i < value.length(); i++) {
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85 char c = value.charAt(i);
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86 switch (c) {
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87 case '"':
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88 builder.append("\\\"");
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89 break;
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90 case '\\':
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91 builder.append("\\\\");
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92 break;
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93 case '\b':
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94 builder.append("\\b");
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95 break;
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96 case '\f':
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97 builder.append("\\f");
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98 break;
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99 case '\n':
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100 builder.append("\\n");
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101 break;
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102 case '\r':
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103 builder.append("\\r");
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104 break;
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105 case '\t':
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106 builder.append("\\t");
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107 break;
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108 default: {
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109 if (c < ' ') {
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110 builder.append("\\u00");
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111 builder.append(Character.forDigit((c >> 4) & 0xF, 16));
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112 builder.append(Character.forDigit(c & 0xF, 16));
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113 } else {
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114 builder.append(c);
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115 }
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116 }
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117 }
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118 }
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119 builder.append('"');
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120 return builder.toString();
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121 }
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122
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123 public static void restart() {
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124 AstJsonDumpBuilder = new StringBuilder();
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125 }
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126
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127 public static JSONObjectBuilder object() {
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128 return new JSONObjectBuilder();
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129 }
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130
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131 public static JSONArrayBuilder array() {
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132 return new JSONArrayBuilder();
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133 }
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134
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135 public abstract static class JSONStringBuilder {
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136 @Override
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137 public final String toString() {
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138 StringBuilder sb = new StringBuilder();
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139 appendTo(sb);
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140 return sb.toString();
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141 }
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142
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143 protected abstract void appendTo(StringBuilder sb);
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144
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145 protected static void appendValue(StringBuilder sb, Object value) {
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146 if (value instanceof JSONStringBuilder) {
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147 ((JSONStringBuilder) value).appendTo(sb);
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148 } else if (value instanceof Integer || value instanceof Boolean || value == null) {
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149 sb.append(value);
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150 } else {
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151 sb.append(quote(String.valueOf(value)));
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152 }
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153 }
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154 }
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155
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156 public static final class JSONObjectBuilder extends JSONStringBuilder {
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157 private final Map<String, Object> contents = new LinkedHashMap<>();
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158
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159 private JSONObjectBuilder() {
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160 }
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161
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162 public JSONObjectBuilder add(String key, String value) {
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163 contents.put(key, value);
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164 return this;
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165 }
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166
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167 public JSONObjectBuilder add(String key, Number value) {
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168 contents.put(key, value);
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169 return this;
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170 }
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171
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172 public JSONObjectBuilder add(String key, Boolean value) {
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173 contents.put(key, value);
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174 return this;
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175 }
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176
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177 public JSONObjectBuilder add(String key, JSONStringBuilder value) {
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178 contents.put(key, value);
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179 return this;
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180 }
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181
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182 @Override
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183 protected void appendTo(StringBuilder sb) {
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184 sb.append("{");
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185 boolean comma = false;
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186 for (Map.Entry<String, Object> entry : contents.entrySet()) {
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187 if (comma) {
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188 sb.append(", ");
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189 }
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190 sb.append(quote(entry.getKey()));
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191 sb.append(": ");
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192 appendValue(sb, entry.getValue());
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193 comma = true;
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194 }
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195 sb.append("}");
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196 }
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197 }
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198
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199 public static final class JSONArrayBuilder extends JSONStringBuilder {
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200 private final List<Object> contents = new ArrayList<>();
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201
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202 private JSONArrayBuilder() {
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203 }
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204
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205 public JSONArrayBuilder add(String value) {
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206 contents.add(value);
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207 return this;
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208 }
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209
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210 public JSONArrayBuilder add(Number value) {
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211 contents.add(value);
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212 return this;
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213 }
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214
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215 public JSONArrayBuilder add(Boolean value) {
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216 contents.add(value);
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217 return this;
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218 }
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219
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220 public JSONArrayBuilder add(JSONStringBuilder value) {
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221 contents.add(value);
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222 return this;
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223 }
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224
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225 @Override
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226 protected void appendTo(StringBuilder sb) {
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227 sb.append("[");
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228 boolean comma = false;
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229 for (Object value : contents) {
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230 if (comma) {
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231 sb.append(", ");
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232 }
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233 appendValue(sb, value);
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234 comma = true;
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235 }
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236 sb.append("]");
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237 }
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238 }
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239 }