Mercurial > projects > orange
annotate orange/serialization/Serializer.d @ 25:b51e953f79eb experimental
Second step in refactoring the API.
| author | Jacob Carlborg <doob@me.com> |
|---|---|
| date | Wed, 06 Oct 2010 16:18:02 +0200 |
| parents | 9a575087b961 |
| children | 78e5fef4bbf2 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Copyright: Copyright (c) 2010 Jacob Carlborg. | |
| 3 * Authors: Jacob Carlborg | |
| 4 * Version: Initial created: Jan 26, 2010 | |
| 5 * License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0) | |
| 6 */ | |
| 7 module orange.serialization.Serializer; | |
| 8 | |
| 9 version (Tango) | |
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10 import tango.util.Convert : to, ConversionException; |
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11 |
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12 else |
| 0 | 13 { |
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14 import std.conv; |
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15 alias ConvError ConversionException; |
| 0 | 16 } |
| 17 | |
| 18 import orange.serialization._; | |
| 19 import orange.serialization.archives._; | |
| 20 import orange.util._; | |
| 21 | |
| 22 private | |
| 23 { | |
| 24 alias orange.util.CTFE.contains ctfeContains; | |
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25 |
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26 enum Mode |
| 0 | 27 { |
| 28 serializing, | |
| 29 deserializing | |
| 30 } | |
| 31 | |
| 32 alias Mode.serializing serializing; | |
| 33 alias Mode.deserializing deserializing; | |
| 34 } | |
| 35 | |
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36 class Serializer |
| 0 | 37 { |
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38 alias void delegate (ArchiveException exception, IArchive.IDataType data) ErrorCallback; |
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39 alias IArchive.IDataType DataType; |
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40 |
| 0 | 41 private |
| 42 { | |
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43 ErrorCallback errorCallback_; |
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44 IArchive archive; |
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45 |
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46 size_t keyCounter; |
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47 size_t idCounter; |
| 0 | 48 |
| 49 RegisterBase[string] serializers; | |
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50 RegisterBase[string] deserializers; |
| 0 | 51 |
| 52 bool hasBegunSerializing; | |
| 53 bool hasBegunDeserializing; | |
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54 |
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55 void delegate (ArchiveException exception, DataType data) throwOnErrorCallback; |
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56 void delegate (ArchiveException exception, DataType data) doNothingOnErrorCallback; |
| 0 | 57 } |
| 58 | |
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59 this (IArchive archive) |
| 0 | 60 { |
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61 this.archive = archive; |
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62 |
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63 throwOnErrorCallback = (ArchiveException exception, IArchive.IDataType data) { throw exception; }; |
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64 doNothingOnErrorCallback = (ArchiveException exception, IArchive.IDataType data) { /* do nothing */ }; |
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65 |
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66 setThrowOnErrorCallback(); |
| 0 | 67 } |
| 68 | |
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69 ErrorCallback errorCallback () |
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70 { |
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71 return errorCallback_; |
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72 } |
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73 |
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74 ErrorCallback errorCallback (ErrorCallback errorCallback) |
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75 { |
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76 return errorCallback_ = errorCallback; |
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77 } |
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78 |
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79 void setThrowOnErrorCallback () |
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80 { |
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81 errorCallback = throwOnErrorCallback; |
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82 } |
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83 |
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84 void setDoNothingOnErrorCallback () |
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85 { |
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86 errorCallback = doNothingOnErrorCallback; |
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87 } |
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88 |
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89 DataType serialize (T) (T value, string key = null) |
| 0 | 90 { |
| 91 if (!hasBegunSerializing) | |
| 92 hasBegunSerializing = true; | |
| 93 | |
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94 serializeInternal(value, key); |
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95 archive.postProcess; |
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96 |
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97 return archive.data; |
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98 } |
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99 |
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100 private void serializeInternal (T) (T value, string key = null) |
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101 { |
| 0 | 102 if (!key) |
| 103 key = nextKey; | |
| 104 | |
| 105 archive.beginArchiving(); | |
| 106 | |
| 107 static if (isTypeDef!(T)) | |
| 108 serializeTypeDef(value, key); | |
| 109 | |
| 110 static if (isObject!(T)) | |
| 111 serializeObject(value, key); | |
| 112 | |
| 113 else static if (isStruct!(T)) | |
| 114 serializeStruct(value, key); | |
| 115 | |
| 116 else static if (isString!(T)) | |
| 117 serializeString(value, key); | |
| 118 | |
| 119 else static if (isArray!(T)) | |
| 120 serializeArray(value, key); | |
| 121 | |
| 122 else static if (isAssociativeArray!(T)) | |
| 123 serializeAssociativeArray(value, key); | |
| 124 | |
| 125 else static if (isPrimitive!(T)) | |
| 126 serializePrimitive(value, key); | |
| 127 | |
| 128 else static if (isPointer!(T)) | |
| 129 { | |
| 130 static if (isFunctionPointer!(T)) | |
| 2 | 131 goto error; |
| 0 | 132 |
| 133 else | |
| 134 serializePointer(value, key); | |
| 2 | 135 } |
| 0 | 136 |
| 137 else static if (isEnum!(T)) | |
| 138 serializeEnum(value, key); | |
| 139 | |
| 140 else | |
| 2 | 141 { |
| 142 error: | |
| 143 throw new SerializationException(format!(`The type "`, T, `" cannot be serialized.`), __FILE__, __LINE__); | |
| 144 } | |
| 0 | 145 } |
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146 |
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147 private void serializeObject (T) (T value, string key) |
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148 { |
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149 auto runtimeType = value.classinfo.name; |
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150 |
| 0 | 151 triggerEvents(serializing, value, { |
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152 archive.archiveObject(runtimeType, T.stringof, key, nextId, { |
| 0 | 153 if (runtimeType in serializers) |
| 154 { | |
| 155 auto wrapper = getSerializerWrapper!(T)(runtimeType); | |
| 156 wrapper(value, this, key); | |
| 157 } | |
| 158 | |
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159 else static if (isSerializable!(T, Serializer)) |
| 0 | 160 value.toData(this, key); |
| 161 | |
| 162 else | |
| 163 { | |
| 164 if (isBaseClass(value)) | |
| 165 throw new SerializationException(`The object of the static type "` ~ T.stringof ~ `" have a different runtime type (` ~ runtimeType ~ `) and therefore needs to register a serializer for its type "` ~ runtimeType ~ `".`, __FILE__, __LINE__); | |
| 166 | |
| 2 | 167 objectStructSerializeHelper(value); |
| 0 | 168 } |
| 169 }); | |
| 170 }); | |
| 171 } | |
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172 |
| 0 | 173 private void serializeStruct (T) (T value, DataType key) |
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174 { |
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175 auto type = T.stringof; |
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176 |
| 0 | 177 triggerEvents(serializing, value, { |
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178 archive.archive(type, key, nextId, { |
| 0 | 179 if (type in serializers) |
| 180 { | |
| 181 auto wrapper = getSerializerWrapper!(T)(type); | |
| 182 wrapper(value, this, key); | |
| 183 } | |
| 184 | |
| 185 else | |
| 186 { | |
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187 static if (isSerializable!(T, Serializer)) |
| 0 | 188 value.toData(this, key); |
| 189 | |
| 190 else | |
| 2 | 191 objectStructSerializeHelper(value); |
| 0 | 192 } |
| 193 }); | |
| 194 }); | |
| 195 } | |
| 196 | |
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197 private void serializeString (T) (T value, string key) |
| 0 | 198 { |
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199 archive.archive(value, key, nextId); |
| 0 | 200 } |
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201 |
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202 private void serializeArray (T) (T value, string key) |
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203 { |
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204 auto array = Array(value.ptr, value.length, BaseTypeOfArray!(T).sizeof); |
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205 |
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206 archive.archiveArray(array, arrayToString!(T), key, nextId, { |
| 0 | 207 foreach (i, e ; value) |
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208 serializeInternal(e, toDataType(i)); |
| 0 | 209 }); |
| 210 } | |
| 211 | |
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212 private void serializePrimitive (T) (T value, string key) |
| 0 | 213 { |
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214 archive.archive(value, key, nextId); |
| 0 | 215 } |
| 216 | |
| 3 | 217 private void objectStructSerializeHelper (T) (ref T value) |
| 218 { | |
| 219 static assert(isStruct!(T) || isObject!(T), format!(`The given value of the type "`, T, `" is not a valid type, the only valid types for this method are objects and structs.`)); | |
| 8 | 220 const nonSerializedFields = collectAnnotations!(nonSerializedField, T); |
| 3 | 221 |
| 222 foreach (i, dummy ; typeof(T.tupleof)) | |
| 223 { | |
| 224 const field = nameOfFieldAt!(T, i); | |
| 225 | |
| 226 static if (!internalFields.ctfeContains(field) && !nonSerializedFields.ctfeContains(field)) | |
| 227 { | |
| 228 alias typeof(T.tupleof[i]) Type; | |
| 229 Type v = value.tupleof[i]; | |
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230 serializeInternal(v, toDataType(field)); |
| 3 | 231 } |
| 232 } | |
| 2 | 233 |
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234 static if (isObject!(T) && !is(T == Object)) |
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235 serializeBaseTypes(value); |
| 3 | 236 } |
| 237 | |
| 238 private void objectStructDeserializeHelper (T) (ref T value) | |
| 239 { | |
| 240 static assert(isStruct!(T) || isObject!(T), format!(`The given value of the type "`, T, `" is not a valid type, the only valid types for this method are objects and structs.`)); | |
| 8 | 241 const nonSerializedFields = collectAnnotations!(nonSerializedField, T); |
| 3 | 242 |
| 243 foreach (i, dummy ; typeof(T.tupleof)) | |
| 244 { | |
| 245 const field = nameOfFieldAt!(T, i); | |
| 246 | |
| 247 static if (!internalFields.ctfeContains(field) && !nonSerializedFields.ctfeContains(field)) | |
| 248 { | |
| 249 alias TypeOfField!(T, field) Type; | |
| 250 auto fieldValue = deserializeInternal!(Type)(toDataType(field)); | |
| 251 value.tupleof[i] = fieldValue; | |
| 252 } | |
| 253 } | |
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254 |
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255 static if (isObject!(T) && !is(T == Object)) |
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256 deserializeBaseTypes(value); |
| 0 | 257 } |
| 258 | |
| 2 | 259 private void serializeBaseTypes (T : Object) (T value) |
| 0 | 260 { |
| 261 alias BaseTypeTupleOf!(T)[0] Base; | |
| 262 | |
| 263 static if (!is(Base == Object)) | |
| 264 { | |
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265 archive.archiveBaseClass(Base.stringof, nextKey, nextId); |
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266 Base base = value; |
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267 objectStructSerializeHelper(base); |
| 0 | 268 } |
| 269 } | |
| 270 | |
| 2 | 271 private void deserializeBaseTypes (T : Object) (T value) |
| 0 | 272 { |
| 273 alias BaseTypeTupleOf!(T)[0] Base; | |
| 274 | |
| 275 static if (!is(Base == Object)) | |
| 276 { | |
| 277 archive.unarchiveBaseClass!(Base)(nextKey); | |
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278 Base base = value; |
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279 objectStructDeserializeHelper(base); |
| 0 | 280 } |
| 281 } | |
| 282 | |
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283 private SerializeRegisterWrapper!(T, Serializer) getSerializerWrapper (T) (string type) |
| 0 | 284 { |
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285 auto wrapper = cast(SerializeRegisterWrapper!(T, Serializer)) serializers[type]; |
| 0 | 286 |
| 287 if (wrapper) | |
| 288 return wrapper; | |
| 289 | |
| 290 assert(false, "throw exception here"); | |
| 291 } | |
| 292 | |
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293 private DeserializeRegisterWrapper!(T, Serializer) getDeserializerWrapper (T) (string type) |
| 0 | 294 { |
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295 auto wrapper = cast(DeserializeRegisterWrapper!(T, Serializer)) deserializers[type]; |
| 0 | 296 |
| 297 if (wrapper) | |
| 298 return wrapper; | |
| 299 | |
| 300 assert(false, "throw exception here"); | |
| 301 } | |
| 302 | |
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303 private SerializeRegisterWrapper!(T, Serializer) toSerializeRegisterWrapper (T) (void delegate (T, Serializer, string) dg) |
| 0 | 304 { |
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305 return new SerializeRegisterWrapper!(T, Serializer)(dg); |
| 0 | 306 } |
| 307 | |
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308 private SerializeRegisterWrapper!(T, Serializer) toSerializeRegisterWrapper (T) (void function (T, Serializer, string) func) |
| 0 | 309 { |
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310 return new SerializeRegisterWrapper!(T, Serializer)(func); |
| 0 | 311 } |
| 312 | |
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313 private DeserializeRegisterWrapper!(T, Serializer) toDeserializeRegisterWrapper (T) (void delegate (ref T, Serializer, string) dg) |
| 0 | 314 { |
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315 return new DeserializeRegisterWrapper!(T, Serializer)(dg); |
| 0 | 316 } |
| 317 | |
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318 private DeserializeRegisterWrapper!(T, Serializer) toDeserializeRegisterWrapper (T) (void function (ref T, Serializer, string) func) |
| 0 | 319 { |
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320 return new DeserializeRegisterWrapper!(T, Serializer)(func); |
| 0 | 321 } |
| 322 | |
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323 private template arrayToString (T) |
| 0 | 324 { |
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325 const arrayToString = BaseTypeOfArray!(T).stringof; |
| 0 | 326 } |
| 327 | |
| 328 private bool isBaseClass (T) (T value) | |
| 329 { | |
| 330 auto name = value.classinfo.name; | |
| 331 auto index = name.lastIndexOf('.'); | |
| 332 | |
| 333 return T.stringof != name[index + 1 .. $]; | |
| 334 } | |
| 335 | |
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336 private size_t nextId () |
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337 { |
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338 return idCounter++; |
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339 } |
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340 |
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341 private string nextKey () |
| 0 | 342 { |
| 343 return toDataType(keyCounter++); | |
| 344 } | |
| 345 | |
| 346 private void resetCounters () | |
| 347 { | |
| 348 keyCounter = 0; | |
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349 idCounter = 0; |
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350 } |
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351 |
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352 private string toDataType (T) (T value) |
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353 { |
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354 return to!(string)(value); |
| 0 | 355 } |
| 356 | |
| 357 private void triggerEvent (string name, T) (T value) | |
| 358 { | |
| 3 | 359 static assert (isObject!(T) || isStruct!(T), format!(`The given value of the type "`, T, `" is not a valid type, the only valid types for this method are objects and structs.`)); |
| 0 | 360 |
| 361 foreach (i, dummy ; typeof(T.tupleof)) | |
| 362 { | |
| 363 const field = nameOfFieldAt!(T, i); | |
| 364 | |
| 365 static if (field == name) | |
| 366 { | |
| 367 alias TypeOfField!(T, field) Type; | |
| 368 auto event = getValueOfField!(T, Type, field)(value); | |
| 369 event(value); | |
| 370 } | |
| 371 } | |
| 372 } | |
| 373 | |
| 374 private void triggerEvents (T) (Mode mode, T value, void delegate () dg) | |
| 375 { | |
| 376 if (mode == serializing) | |
| 377 triggerEvent!(onSerializingField)(value); | |
| 378 | |
| 379 else | |
| 380 triggerEvent!(onDeserializingField)(value); | |
| 381 | |
| 382 dg(); | |
| 383 | |
| 384 if (mode == serializing) | |
| 385 triggerEvent!(onSerializedField)(value); | |
| 386 | |
| 387 else | |
| 388 triggerEvent!(onDeserializedField)(value); | |
| 389 } | |
| 390 | |
| 8 | 391 private static string[] collectAnnotations (string name, T) () |
| 0 | 392 { |
| 3 | 393 static assert (isObject!(T) || isStruct!(T), format!(`The given value of the type "`, T, `" is not a valid type, the only valid types for this method are objects and structs.`)); |
| 0 | 394 |
| 395 string[] annotations; | |
| 396 | |
| 8 | 397 foreach (i, type ; typeof(T.tupleof)) |
| 0 | 398 { |
| 399 const field = nameOfFieldAt!(T, i); | |
| 400 | |
| 401 static if (field == name) | |
| 8 | 402 annotations ~= type.field; |
| 0 | 403 } |
| 404 | |
| 405 return annotations; | |
| 406 } | |
| 407 } |