@@ -1,258 +1,255 | |||||
1 | using System; |
|
1 | using System; | |
2 | using System.Collections.Generic; |
|
2 | using System.Collections.Generic; | |
3 | using System.IO; |
|
3 | using System.IO; | |
4 | using System.Linq; |
|
4 | using System.Linq; | |
5 | using System.Text; |
|
5 | using System.Text; | |
6 | using System.Threading.Tasks; |
|
6 | using System.Threading.Tasks; | |
7 |
|
7 | |||
8 | namespace Implab.JSON { |
|
8 | namespace Implab.JSON { | |
9 | public class JSONWriter { |
|
9 | public class JSONWriter { | |
10 | struct Context { |
|
10 | struct Context { | |
11 | public bool needComma; |
|
11 | public bool needComma; | |
12 | public JSONElementContext element; |
|
12 | public JSONElementContext element; | |
13 | } |
|
13 | } | |
14 | Stack<Context> m_contextStack = new Stack<Context>(); |
|
14 | Stack<Context> m_contextStack = new Stack<Context>(); | |
15 | Context m_context; |
|
15 | Context m_context; | |
16 |
|
16 | |||
17 | TextWriter m_writer; |
|
17 | TextWriter m_writer; | |
18 | readonly bool m_indent = true; |
|
18 | readonly bool m_indent = true; | |
19 | readonly int m_indentSize = 4; |
|
19 | readonly int m_indentSize = 4; | |
20 |
|
20 | |||
21 | static readonly char [] _escapeBKS, |
|
21 | static readonly char [] _escapeBKS, | |
22 | _escapeFWD, |
|
22 | _escapeFWD, | |
23 | _escapeCR, |
|
23 | _escapeCR, | |
24 | _escapeNL, |
|
24 | _escapeNL, | |
25 | _escapeTAB, |
|
25 | _escapeTAB, | |
26 | _escapeSLASH, |
|
26 | _escapeSLASH, | |
27 | _escapeBSLASH, |
|
27 | _escapeBSLASH, | |
28 | _escapeQ; |
|
28 | _escapeQ; | |
29 |
|
29 | |||
30 | static JSONWriter() { |
|
30 | static JSONWriter() { | |
31 | _escapeBKS = "\\b".ToCharArray(); |
|
31 | _escapeBKS = "\\b".ToCharArray(); | |
32 | _escapeFWD = "\\f".ToCharArray(); |
|
32 | _escapeFWD = "\\f".ToCharArray(); | |
33 | _escapeCR = "\\r".ToCharArray(); |
|
33 | _escapeCR = "\\r".ToCharArray(); | |
34 | _escapeNL = "\\n".ToCharArray(); |
|
34 | _escapeNL = "\\n".ToCharArray(); | |
35 | _escapeTAB = "\\t".ToCharArray(); |
|
35 | _escapeTAB = "\\t".ToCharArray(); | |
36 | _escapeBSLASH = "\\\\".ToCharArray(); |
|
36 | _escapeBSLASH = "\\\\".ToCharArray(); | |
37 | _escapeSLASH = "\\/".ToCharArray(); |
|
37 | _escapeSLASH = "\\/".ToCharArray(); | |
38 | _escapeQ = "\\\"".ToCharArray(); |
|
38 | _escapeQ = "\\\"".ToCharArray(); | |
39 | } |
|
39 | } | |
40 |
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40 | |||
41 | public JSONWriter(TextWriter writer) { |
|
41 | public JSONWriter(TextWriter writer) { | |
42 | Safe.ArgumentNotNull(writer, "writer"); |
|
42 | Safe.ArgumentNotNull(writer, "writer"); | |
43 |
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43 | |||
44 | m_writer = writer; |
|
44 | m_writer = writer; | |
45 | } |
|
45 | } | |
46 |
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46 | |||
47 | public JSONWriter(TextWriter writer, bool indent) { |
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47 | public JSONWriter(TextWriter writer, bool indent) { | |
48 | Safe.ArgumentNotNull(writer, "writer"); |
|
48 | Safe.ArgumentNotNull(writer, "writer"); | |
49 |
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49 | |||
50 | m_writer = writer; |
|
50 | m_writer = writer; | |
51 | m_indent = indent; |
|
51 | m_indent = indent; | |
52 | } |
|
52 | } | |
53 |
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53 | |||
54 | void WriteIndent() { |
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54 | void WriteIndent() { | |
55 | if (m_indent) { |
|
55 | if (m_indent) { | |
56 | var indent = new char[m_contextStack.Count * m_indentSize + 1]; |
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56 | var indent = new char[m_contextStack.Count * m_indentSize + 1]; | |
57 | indent[0] = '\n'; |
|
57 | indent[0] = '\n'; | |
58 | for (int i = 1; i < indent.Length; i++) |
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58 | for (int i = 1; i < indent.Length; i++) | |
59 | indent[i] = ' '; |
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59 | indent[i] = ' '; | |
60 | m_writer.Write(new String(indent)); |
|
60 | m_writer.Write(new String(indent)); | |
61 | } else { |
|
61 | } else { | |
62 | m_writer.Write(' '); |
|
62 | m_writer.Write(' '); | |
63 | } |
|
63 | } | |
64 | } |
|
64 | } | |
65 |
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65 | |||
66 | void WriteMemberName(string name) { |
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66 | void WriteMemberName(string name) { | |
67 | Safe.ArgumentNotEmpty(name, "name"); |
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67 | Safe.ArgumentNotEmpty(name, "name"); | |
68 | if (m_context.element != JSONElementContext.Object) |
|
68 | if (m_context.element != JSONElementContext.Object) | |
69 | OperationNotApplicable("WriteMember"); |
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69 | OperationNotApplicable("WriteMember"); | |
70 | if (m_context.needComma) |
|
70 | if (m_context.needComma) | |
71 | m_writer.Write(","); |
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71 | m_writer.Write(","); | |
72 |
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72 | |||
73 | WriteIndent(); |
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73 | WriteIndent(); | |
74 | m_context.needComma = true; |
|
74 | m_context.needComma = true; | |
75 | Write(name); |
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75 | Write(name); | |
76 | m_writer.Write(" : "); |
|
76 | m_writer.Write(" : "); | |
77 | } |
|
77 | } | |
78 |
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78 | |||
79 | public void WriteValue(string name, string value) { |
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79 | public void WriteValue(string name, string value) { | |
80 | WriteMemberName(name); |
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80 | WriteMemberName(name); | |
81 | Write(value); |
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81 | Write(value); | |
82 | } |
|
82 | } | |
83 |
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83 | |||
84 | public void WriteValue(string name, bool value) { |
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84 | public void WriteValue(string name, bool value) { | |
85 | WriteMemberName(name); |
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85 | WriteMemberName(name); | |
86 | Write(value); |
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86 | Write(value); | |
87 | } |
|
87 | } | |
88 |
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88 | |||
89 | public void WriteValue(string name, double value) { |
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89 | public void WriteValue(string name, double value) { | |
90 | WriteMemberName(name); |
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90 | WriteMemberName(name); | |
91 | Write(value); |
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91 | Write(value); | |
92 | } |
|
92 | } | |
93 |
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93 | |||
94 | public void WriteValue(string value) { |
|
94 | public void WriteValue(string value) { | |
95 | if (m_context.element != JSONElementContext.Array) |
|
95 | if (m_context.element != JSONElementContext.Array) | |
96 | OperationNotApplicable("WriteValue"); |
|
96 | OperationNotApplicable("WriteValue"); | |
97 | if (m_context.needComma) |
|
97 | if (m_context.needComma) | |
98 | m_writer.Write(","); |
|
98 | m_writer.Write(","); | |
99 | WriteIndent(); |
|
99 | WriteIndent(); | |
100 | m_context.needComma = true; |
|
100 | m_context.needComma = true; | |
101 |
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101 | |||
102 | Write(value); |
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102 | Write(value); | |
103 | } |
|
103 | } | |
104 |
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104 | |||
105 | public void WriteValue(bool value) { |
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105 | public void WriteValue(bool value) { | |
106 | if (m_context.element != JSONElementContext.Array) |
|
106 | if (m_context.element != JSONElementContext.Array) | |
107 | OperationNotApplicable("WriteValue"); |
|
107 | OperationNotApplicable("WriteValue"); | |
108 | if (m_context.needComma) |
|
108 | if (m_context.needComma) | |
109 | m_writer.Write(","); |
|
109 | m_writer.Write(","); | |
110 | m_context.needComma = true; |
|
110 | m_context.needComma = true; | |
111 |
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111 | |||
112 | WriteIndent(); |
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112 | WriteIndent(); | |
113 | Write(value); |
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113 | Write(value); | |
114 | } |
|
114 | } | |
115 |
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115 | |||
116 | public void WriteValue(double value) { |
|
116 | public void WriteValue(double value) { | |
117 | if (m_context.element != JSONElementContext.Array) |
|
117 | if (m_context.element != JSONElementContext.Array) | |
118 | OperationNotApplicable("WriteValue"); |
|
118 | OperationNotApplicable("WriteValue"); | |
119 | if (m_context.needComma) |
|
119 | if (m_context.needComma) | |
120 | m_writer.Write(","); |
|
120 | m_writer.Write(","); | |
121 | m_context.needComma = true; |
|
121 | m_context.needComma = true; | |
122 |
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122 | |||
123 | WriteIndent(); |
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123 | WriteIndent(); | |
124 | Write(value); |
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124 | Write(value); | |
125 | } |
|
125 | } | |
126 |
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126 | |||
127 | public void BeginObject() { |
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127 | public void BeginObject() { | |
128 | if (m_context.element != JSONElementContext.None && m_context.element != JSONElementContext.Array) |
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128 | if (m_context.element != JSONElementContext.None && m_context.element != JSONElementContext.Array) | |
129 | OperationNotApplicable("BeginObject"); |
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129 | OperationNotApplicable("BeginObject"); | |
130 | if (m_context.needComma) |
|
130 | if (m_context.needComma) | |
131 | m_writer.Write(","); |
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131 | m_writer.Write(","); | |
132 |
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132 | |||
133 | WriteIndent(); |
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133 | WriteIndent(); | |
134 |
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134 | |||
135 | m_context.needComma = true; |
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135 | m_context.needComma = true; | |
136 |
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136 | |||
137 | m_contextStack.Push(m_context); |
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137 | m_contextStack.Push(m_context); | |
138 |
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138 | |||
139 | m_context = new Context { element = JSONElementContext.Object, needComma = false }; |
|
139 | m_context = new Context { element = JSONElementContext.Object, needComma = false }; | |
140 | m_writer.Write("{"); |
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140 | m_writer.Write("{"); | |
141 | } |
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141 | } | |
142 |
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142 | |||
143 | public void BeginObject(string name) { |
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143 | public void BeginObject(string name) { | |
144 | WriteMemberName(name); |
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144 | WriteMemberName(name); | |
145 |
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145 | |||
146 | m_contextStack.Push(m_context); |
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146 | m_contextStack.Push(m_context); | |
147 |
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147 | |||
148 | m_context = new Context { element = JSONElementContext.Object, needComma = false }; |
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148 | m_context = new Context { element = JSONElementContext.Object, needComma = false }; | |
149 | m_writer.Write("{"); |
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149 | m_writer.Write("{"); | |
150 | } |
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150 | } | |
151 |
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151 | |||
152 | public void EndObject() { |
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152 | public void EndObject() { | |
153 | if (m_context.element != JSONElementContext.Object) |
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153 | if (m_context.element != JSONElementContext.Object) | |
154 | OperationNotApplicable("EndArray"); |
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154 | OperationNotApplicable("EndArray"); | |
155 |
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155 | |||
156 | m_context = m_contextStack.Pop(); |
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156 | m_context = m_contextStack.Pop(); | |
157 | WriteIndent(); |
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157 | WriteIndent(); | |
158 | m_writer.Write("}"); |
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158 | m_writer.Write("}"); | |
159 | } |
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159 | } | |
160 |
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160 | |||
161 | public void BeginArray() { |
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161 | public void BeginArray() { | |
162 | if (m_context.element != JSONElementContext.None && m_context.element != JSONElementContext.Array) |
|
162 | if (m_context.element != JSONElementContext.None && m_context.element != JSONElementContext.Array) | |
163 | throw new InvalidOperationException(); |
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163 | throw new InvalidOperationException(); | |
164 | if (m_context.needComma) { |
|
164 | if (m_context.needComma) { | |
165 | m_writer.Write(","); |
|
165 | m_writer.Write(","); | |
166 |
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166 | |||
167 | } |
|
167 | } | |
168 | m_context.needComma = true; |
|
168 | m_context.needComma = true; | |
169 |
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169 | |||
170 | WriteIndent(); |
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170 | WriteIndent(); | |
171 | m_contextStack.Push(m_context); |
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171 | m_contextStack.Push(m_context); | |
172 | m_context = new Context { element = JSONElementContext.Array, needComma = false }; |
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172 | m_context = new Context { element = JSONElementContext.Array, needComma = false }; | |
173 | m_writer.Write("["); |
|
173 | m_writer.Write("["); | |
174 | } |
|
174 | } | |
175 |
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175 | |||
176 | public void BeginArray(string name) { |
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176 | public void BeginArray(string name) { | |
177 | WriteMemberName(name); |
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177 | WriteMemberName(name); | |
178 |
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178 | |||
179 | m_contextStack.Push(m_context); |
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179 | m_contextStack.Push(m_context); | |
180 |
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180 | |||
181 | m_context = new Context { element = JSONElementContext.Array, needComma = false }; |
|
181 | m_context = new Context { element = JSONElementContext.Array, needComma = false }; | |
182 | m_writer.Write("["); |
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182 | m_writer.Write("["); | |
183 | } |
|
183 | } | |
184 |
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184 | |||
185 | public void EndArray() { |
|
185 | public void EndArray() { | |
186 | if (m_context.element != JSONElementContext.Array) |
|
186 | if (m_context.element != JSONElementContext.Array) | |
187 | OperationNotApplicable("EndArray"); |
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187 | OperationNotApplicable("EndArray"); | |
188 |
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188 | |||
189 | m_context = m_contextStack.Pop(); |
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189 | m_context = m_contextStack.Pop(); | |
190 | WriteIndent(); |
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190 | WriteIndent(); | |
191 | m_writer.Write("]"); |
|
191 | m_writer.Write("]"); | |
192 | } |
|
192 | } | |
193 |
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193 | |||
194 | void Write(bool value) { |
|
194 | void Write(bool value) { | |
195 | m_writer.Write(value ? "true" : "false"); |
|
195 | m_writer.Write(value ? "true" : "false"); | |
196 | } |
|
196 | } | |
197 |
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197 | |||
198 |
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198 | |||
199 | void Write(string value) { |
|
199 | void Write(string value) { | |
200 | if (value == null) { |
|
200 | if (value == null) { | |
201 | m_writer.Write("null"); |
|
201 | m_writer.Write("null"); | |
202 | return; |
|
202 | return; | |
203 | } |
|
203 | } | |
204 |
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204 | |||
205 | var chars = value.ToCharArray(); |
|
205 | var chars = value.ToCharArray(); | |
206 | m_writer.Write('"'); |
|
206 | m_writer.Write('"'); | |
207 |
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207 | |||
208 | for (int i = 0; i < chars.Length; i++) { |
|
208 | for (int i = 0; i < chars.Length; i++) { | |
209 | var ch = chars[i]; |
|
209 | var ch = chars[i]; | |
210 |
|
210 | |||
211 | switch (ch) { |
|
211 | switch (ch) { | |
212 | case '\b': |
|
212 | case '\b': | |
213 | m_writer.Write(_escapeBKS); |
|
213 | m_writer.Write(_escapeBKS); | |
214 | break; |
|
214 | break; | |
215 | case '\f': |
|
215 | case '\f': | |
216 | m_writer.Write(_escapeFWD); |
|
216 | m_writer.Write(_escapeFWD); | |
217 | break; |
|
217 | break; | |
218 | case '\r': |
|
218 | case '\r': | |
219 | m_writer.Write(_escapeCR); |
|
219 | m_writer.Write(_escapeCR); | |
220 | break; |
|
220 | break; | |
221 | case '\n': |
|
221 | case '\n': | |
222 | m_writer.Write(_escapeNL); |
|
222 | m_writer.Write(_escapeNL); | |
223 | break; |
|
223 | break; | |
224 | case '\t': |
|
224 | case '\t': | |
225 | m_writer.Write(_escapeTAB); |
|
225 | m_writer.Write(_escapeTAB); | |
226 | break; |
|
226 | break; | |
227 | case '\\': |
|
227 | case '\\': | |
228 | m_writer.Write(_escapeBSLASH); |
|
228 | m_writer.Write(_escapeBSLASH); | |
229 | break; |
|
229 | break; | |
230 | case '/': |
|
|||
231 | m_writer.Write(_escapeSLASH); |
|
|||
232 | break; |
|
|||
233 | case '"': |
|
230 | case '"': | |
234 | m_writer.Write(_escapeQ); |
|
231 | m_writer.Write(_escapeQ); | |
235 | break; |
|
232 | break; | |
236 | default: |
|
233 | default: | |
237 | if (ch < 0x20) { |
|
234 | if (ch < 0x20) { | |
238 | m_writer.Write("\\u00{0:x2}",(int)ch); |
|
235 | m_writer.Write("\\u00{0:x2}",(int)ch); | |
239 | } else { |
|
236 | } else { | |
240 | m_writer.Write(ch); |
|
237 | m_writer.Write(ch); | |
241 | } |
|
238 | } | |
242 | break; |
|
239 | break; | |
243 | } |
|
240 | } | |
244 | } |
|
241 | } | |
245 |
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242 | |||
246 | m_writer.Write('"'); |
|
243 | m_writer.Write('"'); | |
247 | } |
|
244 | } | |
248 |
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245 | |||
249 | void Write(double value) { |
|
246 | void Write(double value) { | |
250 | m_writer.Write(value); |
|
247 | m_writer.Write(value); | |
251 | } |
|
248 | } | |
252 |
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249 | |||
253 | void OperationNotApplicable(string opName) { |
|
250 | void OperationNotApplicable(string opName) { | |
254 | throw new InvalidOperationException(String.Format("The operation '{0}' isn't applicable in the context of '{1}'", opName, m_context.element )); |
|
251 | throw new InvalidOperationException(String.Format("The operation '{0}' isn't applicable in the context of '{1}'", opName, m_context.element )); | |
255 | } |
|
252 | } | |
256 |
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253 | |||
257 | } |
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254 | } | |
258 | } |
|
255 | } |
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