Don Newton | 379ae25 | 2019-04-01 12:17:06 -0400 | [diff] [blame^] | 1 | // Copyright (C) MongoDB, Inc. 2017-present. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 4 | // not use this file except in compliance with the License. You may obtain |
| 5 | // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 |
| 6 | |
| 7 | package bsonx |
| 8 | |
| 9 | import ( |
| 10 | "errors" |
| 11 | "fmt" |
| 12 | "reflect" |
| 13 | |
| 14 | "github.com/mongodb/mongo-go-driver/bson/bsoncodec" |
| 15 | "github.com/mongodb/mongo-go-driver/bson/bsonrw" |
| 16 | "github.com/mongodb/mongo-go-driver/bson/bsontype" |
| 17 | ) |
| 18 | |
| 19 | var primitiveCodecs PrimitiveCodecs |
| 20 | |
| 21 | var tDocument = reflect.TypeOf((Doc)(nil)) |
| 22 | var tMDoc = reflect.TypeOf((MDoc)(nil)) |
| 23 | var tArray = reflect.TypeOf((Arr)(nil)) |
| 24 | var tValue = reflect.TypeOf(Val{}) |
| 25 | var tElementSlice = reflect.TypeOf(([]Elem)(nil)) |
| 26 | |
| 27 | // PrimitiveCodecs is a namespace for all of the default bsoncodec.Codecs for the primitive types |
| 28 | // defined in this package. |
| 29 | type PrimitiveCodecs struct{} |
| 30 | |
| 31 | // RegisterPrimitiveCodecs will register the encode and decode methods attached to PrimitiveCodecs |
| 32 | // with the provided RegistryBuilder. if rb is nil, a new empty RegistryBuilder will be created. |
| 33 | func (pc PrimitiveCodecs) RegisterPrimitiveCodecs(rb *bsoncodec.RegistryBuilder) { |
| 34 | if rb == nil { |
| 35 | panic(errors.New("argument to RegisterPrimitiveCodecs must not be nil")) |
| 36 | } |
| 37 | |
| 38 | rb. |
| 39 | RegisterEncoder(tDocument, bsoncodec.ValueEncoderFunc(pc.DocumentEncodeValue)). |
| 40 | RegisterEncoder(tArray, bsoncodec.ValueEncoderFunc(pc.ArrayEncodeValue)). |
| 41 | RegisterEncoder(tValue, bsoncodec.ValueEncoderFunc(pc.ValueEncodeValue)). |
| 42 | RegisterEncoder(tElementSlice, bsoncodec.ValueEncoderFunc(pc.ElementSliceEncodeValue)). |
| 43 | RegisterDecoder(tDocument, bsoncodec.ValueDecoderFunc(pc.DocumentDecodeValue)). |
| 44 | RegisterDecoder(tArray, bsoncodec.ValueDecoderFunc(pc.ArrayDecodeValue)). |
| 45 | RegisterDecoder(tValue, bsoncodec.ValueDecoderFunc(pc.ValueDecodeValue)). |
| 46 | RegisterDecoder(tElementSlice, bsoncodec.ValueDecoderFunc(pc.ElementSliceDecodeValue)) |
| 47 | } |
| 48 | |
| 49 | // DocumentEncodeValue is the ValueEncoderFunc for *Document. |
| 50 | func (pc PrimitiveCodecs) DocumentEncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error { |
| 51 | if !val.IsValid() || val.Type() != tDocument { |
| 52 | return bsoncodec.ValueEncoderError{Name: "DocumentEncodeValue", Types: []reflect.Type{tDocument}, Received: val} |
| 53 | } |
| 54 | |
| 55 | if val.IsNil() { |
| 56 | return vw.WriteNull() |
| 57 | } |
| 58 | |
| 59 | doc := val.Interface().(Doc) |
| 60 | |
| 61 | dw, err := vw.WriteDocument() |
| 62 | if err != nil { |
| 63 | return err |
| 64 | } |
| 65 | |
| 66 | return pc.encodeDocument(ec, dw, doc) |
| 67 | } |
| 68 | |
| 69 | // DocumentDecodeValue is the ValueDecoderFunc for *Document. |
| 70 | func (pc PrimitiveCodecs) DocumentDecodeValue(dctx bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error { |
| 71 | if !val.CanSet() || val.Type() != tDocument { |
| 72 | return bsoncodec.ValueDecoderError{Name: "DocumentDecodeValue", Types: []reflect.Type{tDocument}, Received: val} |
| 73 | } |
| 74 | |
| 75 | return pc.documentDecodeValue(dctx, vr, val.Addr().Interface().(*Doc)) |
| 76 | } |
| 77 | |
| 78 | func (pc PrimitiveCodecs) documentDecodeValue(dctx bsoncodec.DecodeContext, vr bsonrw.ValueReader, doc *Doc) error { |
| 79 | |
| 80 | dr, err := vr.ReadDocument() |
| 81 | if err != nil { |
| 82 | return err |
| 83 | } |
| 84 | |
| 85 | return pc.decodeDocument(dctx, dr, doc) |
| 86 | } |
| 87 | |
| 88 | // ArrayEncodeValue is the ValueEncoderFunc for *Array. |
| 89 | func (pc PrimitiveCodecs) ArrayEncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error { |
| 90 | if !val.IsValid() || val.Type() != tArray { |
| 91 | return bsoncodec.ValueEncoderError{Name: "ArrayEncodeValue", Types: []reflect.Type{tArray}, Received: val} |
| 92 | } |
| 93 | |
| 94 | if val.IsNil() { |
| 95 | return vw.WriteNull() |
| 96 | } |
| 97 | |
| 98 | arr := val.Interface().(Arr) |
| 99 | |
| 100 | aw, err := vw.WriteArray() |
| 101 | if err != nil { |
| 102 | return err |
| 103 | } |
| 104 | |
| 105 | for _, val := range arr { |
| 106 | dvw, err := aw.WriteArrayElement() |
| 107 | if err != nil { |
| 108 | return err |
| 109 | } |
| 110 | |
| 111 | err = pc.encodeValue(ec, dvw, val) |
| 112 | |
| 113 | if err != nil { |
| 114 | return err |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | return aw.WriteArrayEnd() |
| 119 | } |
| 120 | |
| 121 | // ArrayDecodeValue is the ValueDecoderFunc for *Array. |
| 122 | func (pc PrimitiveCodecs) ArrayDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error { |
| 123 | if !val.CanSet() || val.Type() != tArray { |
| 124 | return bsoncodec.ValueDecoderError{Name: "ArrayDecodeValue", Types: []reflect.Type{tArray}, Received: val} |
| 125 | } |
| 126 | |
| 127 | ar, err := vr.ReadArray() |
| 128 | if err != nil { |
| 129 | return err |
| 130 | } |
| 131 | |
| 132 | if val.IsNil() { |
| 133 | val.Set(reflect.MakeSlice(tArray, 0, 0)) |
| 134 | } |
| 135 | val.SetLen(0) |
| 136 | |
| 137 | for { |
| 138 | vr, err := ar.ReadValue() |
| 139 | if err == bsonrw.ErrEOA { |
| 140 | break |
| 141 | } |
| 142 | if err != nil { |
| 143 | return err |
| 144 | } |
| 145 | |
| 146 | var elem Val |
| 147 | err = pc.valueDecodeValue(dc, vr, &elem) |
| 148 | if err != nil { |
| 149 | return err |
| 150 | } |
| 151 | |
| 152 | val.Set(reflect.Append(val, reflect.ValueOf(elem))) |
| 153 | } |
| 154 | |
| 155 | return nil |
| 156 | } |
| 157 | |
| 158 | // ElementSliceEncodeValue is the ValueEncoderFunc for []*Element. |
| 159 | func (pc PrimitiveCodecs) ElementSliceEncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error { |
| 160 | if !val.IsValid() || val.Type() != tElementSlice { |
| 161 | return bsoncodec.ValueEncoderError{Name: "ElementSliceEncodeValue", Types: []reflect.Type{tElementSlice}, Received: val} |
| 162 | } |
| 163 | |
| 164 | if val.IsNil() { |
| 165 | return vw.WriteNull() |
| 166 | } |
| 167 | |
| 168 | return pc.DocumentEncodeValue(ec, vw, val.Convert(tDocument)) |
| 169 | } |
| 170 | |
| 171 | // ElementSliceDecodeValue is the ValueDecoderFunc for []*Element. |
| 172 | func (pc PrimitiveCodecs) ElementSliceDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error { |
| 173 | if !val.CanSet() || val.Type() != tElementSlice { |
| 174 | return bsoncodec.ValueDecoderError{Name: "ElementSliceDecodeValue", Types: []reflect.Type{tElementSlice}, Received: val} |
| 175 | } |
| 176 | |
| 177 | if val.IsNil() { |
| 178 | val.Set(reflect.MakeSlice(val.Type(), 0, 0)) |
| 179 | } |
| 180 | |
| 181 | val.SetLen(0) |
| 182 | |
| 183 | dr, err := vr.ReadDocument() |
| 184 | if err != nil { |
| 185 | return err |
| 186 | } |
| 187 | elems := make([]reflect.Value, 0) |
| 188 | for { |
| 189 | key, vr, err := dr.ReadElement() |
| 190 | if err == bsonrw.ErrEOD { |
| 191 | break |
| 192 | } |
| 193 | if err != nil { |
| 194 | return err |
| 195 | } |
| 196 | |
| 197 | var elem Elem |
| 198 | err = pc.elementDecodeValue(dc, vr, key, &elem) |
| 199 | if err != nil { |
| 200 | return err |
| 201 | } |
| 202 | |
| 203 | elems = append(elems, reflect.ValueOf(elem)) |
| 204 | } |
| 205 | |
| 206 | val.Set(reflect.Append(val, elems...)) |
| 207 | return nil |
| 208 | } |
| 209 | |
| 210 | // ValueEncodeValue is the ValueEncoderFunc for *Value. |
| 211 | func (pc PrimitiveCodecs) ValueEncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error { |
| 212 | if !val.IsValid() || val.Type() != tValue { |
| 213 | return bsoncodec.ValueEncoderError{Name: "ValueEncodeValue", Types: []reflect.Type{tValue}, Received: val} |
| 214 | } |
| 215 | |
| 216 | v := val.Interface().(Val) |
| 217 | |
| 218 | return pc.encodeValue(ec, vw, v) |
| 219 | } |
| 220 | |
| 221 | // ValueDecodeValue is the ValueDecoderFunc for *Value. |
| 222 | func (pc PrimitiveCodecs) ValueDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error { |
| 223 | if !val.CanSet() || val.Type() != tValue { |
| 224 | return bsoncodec.ValueDecoderError{Name: "ValueDecodeValue", Types: []reflect.Type{tValue}, Received: val} |
| 225 | } |
| 226 | |
| 227 | return pc.valueDecodeValue(dc, vr, val.Addr().Interface().(*Val)) |
| 228 | } |
| 229 | |
| 230 | // encodeDocument is a separate function that we use because CodeWithScope |
| 231 | // returns us a DocumentWriter and we need to do the same logic that we would do |
| 232 | // for a document but cannot use a Codec. |
| 233 | func (pc PrimitiveCodecs) encodeDocument(ec bsoncodec.EncodeContext, dw bsonrw.DocumentWriter, doc Doc) error { |
| 234 | for _, elem := range doc { |
| 235 | dvw, err := dw.WriteDocumentElement(elem.Key) |
| 236 | if err != nil { |
| 237 | return err |
| 238 | } |
| 239 | |
| 240 | err = pc.encodeValue(ec, dvw, elem.Value) |
| 241 | |
| 242 | if err != nil { |
| 243 | return err |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | return dw.WriteDocumentEnd() |
| 248 | } |
| 249 | |
| 250 | // DecodeDocument haves decoding into a Doc from a bsonrw.DocumentReader. |
| 251 | func (pc PrimitiveCodecs) DecodeDocument(dctx bsoncodec.DecodeContext, dr bsonrw.DocumentReader, pdoc *Doc) error { |
| 252 | return pc.decodeDocument(dctx, dr, pdoc) |
| 253 | } |
| 254 | |
| 255 | func (pc PrimitiveCodecs) decodeDocument(dctx bsoncodec.DecodeContext, dr bsonrw.DocumentReader, pdoc *Doc) error { |
| 256 | if *pdoc == nil { |
| 257 | *pdoc = make(Doc, 0) |
| 258 | } |
| 259 | *pdoc = (*pdoc)[:0] |
| 260 | for { |
| 261 | key, vr, err := dr.ReadElement() |
| 262 | if err == bsonrw.ErrEOD { |
| 263 | break |
| 264 | } |
| 265 | if err != nil { |
| 266 | return err |
| 267 | } |
| 268 | |
| 269 | var elem Elem |
| 270 | err = pc.elementDecodeValue(dctx, vr, key, &elem) |
| 271 | if err != nil { |
| 272 | return err |
| 273 | } |
| 274 | |
| 275 | *pdoc = append(*pdoc, elem) |
| 276 | } |
| 277 | return nil |
| 278 | } |
| 279 | |
| 280 | func (pc PrimitiveCodecs) elementDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, key string, elem *Elem) error { |
| 281 | var val Val |
| 282 | switch vr.Type() { |
| 283 | case bsontype.Double: |
| 284 | f64, err := vr.ReadDouble() |
| 285 | if err != nil { |
| 286 | return err |
| 287 | } |
| 288 | val = Double(f64) |
| 289 | case bsontype.String: |
| 290 | str, err := vr.ReadString() |
| 291 | if err != nil { |
| 292 | return err |
| 293 | } |
| 294 | val = String(str) |
| 295 | case bsontype.EmbeddedDocument: |
| 296 | var embeddedDoc Doc |
| 297 | err := pc.documentDecodeValue(dc, vr, &embeddedDoc) |
| 298 | if err != nil { |
| 299 | return err |
| 300 | } |
| 301 | val = Document(embeddedDoc) |
| 302 | case bsontype.Array: |
| 303 | arr := reflect.New(tArray).Elem() |
| 304 | err := pc.ArrayDecodeValue(dc, vr, arr) |
| 305 | if err != nil { |
| 306 | return err |
| 307 | } |
| 308 | val = Array(arr.Interface().(Arr)) |
| 309 | case bsontype.Binary: |
| 310 | data, subtype, err := vr.ReadBinary() |
| 311 | if err != nil { |
| 312 | return err |
| 313 | } |
| 314 | val = Binary(subtype, data) |
| 315 | case bsontype.Undefined: |
| 316 | err := vr.ReadUndefined() |
| 317 | if err != nil { |
| 318 | return err |
| 319 | } |
| 320 | val = Undefined() |
| 321 | case bsontype.ObjectID: |
| 322 | oid, err := vr.ReadObjectID() |
| 323 | if err != nil { |
| 324 | return err |
| 325 | } |
| 326 | val = ObjectID(oid) |
| 327 | case bsontype.Boolean: |
| 328 | b, err := vr.ReadBoolean() |
| 329 | if err != nil { |
| 330 | return err |
| 331 | } |
| 332 | val = Boolean(b) |
| 333 | case bsontype.DateTime: |
| 334 | dt, err := vr.ReadDateTime() |
| 335 | if err != nil { |
| 336 | return err |
| 337 | } |
| 338 | val = DateTime(dt) |
| 339 | case bsontype.Null: |
| 340 | err := vr.ReadNull() |
| 341 | if err != nil { |
| 342 | return err |
| 343 | } |
| 344 | val = Null() |
| 345 | case bsontype.Regex: |
| 346 | pattern, options, err := vr.ReadRegex() |
| 347 | if err != nil { |
| 348 | return err |
| 349 | } |
| 350 | val = Regex(pattern, options) |
| 351 | case bsontype.DBPointer: |
| 352 | ns, pointer, err := vr.ReadDBPointer() |
| 353 | if err != nil { |
| 354 | return err |
| 355 | } |
| 356 | val = DBPointer(ns, pointer) |
| 357 | case bsontype.JavaScript: |
| 358 | js, err := vr.ReadJavascript() |
| 359 | if err != nil { |
| 360 | return err |
| 361 | } |
| 362 | val = JavaScript(js) |
| 363 | case bsontype.Symbol: |
| 364 | symbol, err := vr.ReadSymbol() |
| 365 | if err != nil { |
| 366 | return err |
| 367 | } |
| 368 | val = Symbol(symbol) |
| 369 | case bsontype.CodeWithScope: |
| 370 | code, scope, err := vr.ReadCodeWithScope() |
| 371 | if err != nil { |
| 372 | return err |
| 373 | } |
| 374 | var doc Doc |
| 375 | err = pc.decodeDocument(dc, scope, &doc) |
| 376 | if err != nil { |
| 377 | return err |
| 378 | } |
| 379 | val = CodeWithScope(code, doc) |
| 380 | case bsontype.Int32: |
| 381 | i32, err := vr.ReadInt32() |
| 382 | if err != nil { |
| 383 | return err |
| 384 | } |
| 385 | val = Int32(i32) |
| 386 | case bsontype.Timestamp: |
| 387 | t, i, err := vr.ReadTimestamp() |
| 388 | if err != nil { |
| 389 | return err |
| 390 | } |
| 391 | val = Timestamp(t, i) |
| 392 | case bsontype.Int64: |
| 393 | i64, err := vr.ReadInt64() |
| 394 | if err != nil { |
| 395 | return err |
| 396 | } |
| 397 | val = Int64(i64) |
| 398 | case bsontype.Decimal128: |
| 399 | d128, err := vr.ReadDecimal128() |
| 400 | if err != nil { |
| 401 | return err |
| 402 | } |
| 403 | val = Decimal128(d128) |
| 404 | case bsontype.MinKey: |
| 405 | err := vr.ReadMinKey() |
| 406 | if err != nil { |
| 407 | return err |
| 408 | } |
| 409 | val = MinKey() |
| 410 | case bsontype.MaxKey: |
| 411 | err := vr.ReadMaxKey() |
| 412 | if err != nil { |
| 413 | return err |
| 414 | } |
| 415 | val = MaxKey() |
| 416 | default: |
| 417 | return fmt.Errorf("Cannot read unknown BSON type %s", vr.Type()) |
| 418 | } |
| 419 | |
| 420 | *elem = Elem{Key: key, Value: val} |
| 421 | return nil |
| 422 | } |
| 423 | |
| 424 | // encodeValue does not validation, and the callers must perform validation on val before calling |
| 425 | // this method. |
| 426 | func (pc PrimitiveCodecs) encodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val Val) error { |
| 427 | var err error |
| 428 | switch val.Type() { |
| 429 | case bsontype.Double: |
| 430 | err = vw.WriteDouble(val.Double()) |
| 431 | case bsontype.String: |
| 432 | err = vw.WriteString(val.StringValue()) |
| 433 | case bsontype.EmbeddedDocument: |
| 434 | var encoder bsoncodec.ValueEncoder |
| 435 | encoder, err = ec.LookupEncoder(tDocument) |
| 436 | if err != nil { |
| 437 | break |
| 438 | } |
| 439 | err = encoder.EncodeValue(ec, vw, reflect.ValueOf(val.Document())) |
| 440 | case bsontype.Array: |
| 441 | var encoder bsoncodec.ValueEncoder |
| 442 | encoder, err = ec.LookupEncoder(tArray) |
| 443 | if err != nil { |
| 444 | break |
| 445 | } |
| 446 | err = encoder.EncodeValue(ec, vw, reflect.ValueOf(val.Array())) |
| 447 | case bsontype.Binary: |
| 448 | // TODO: FIX THIS (╯°□°)╯︵ ┻━┻ |
| 449 | subtype, data := val.Binary() |
| 450 | err = vw.WriteBinaryWithSubtype(data, subtype) |
| 451 | case bsontype.Undefined: |
| 452 | err = vw.WriteUndefined() |
| 453 | case bsontype.ObjectID: |
| 454 | err = vw.WriteObjectID(val.ObjectID()) |
| 455 | case bsontype.Boolean: |
| 456 | err = vw.WriteBoolean(val.Boolean()) |
| 457 | case bsontype.DateTime: |
| 458 | err = vw.WriteDateTime(val.DateTime()) |
| 459 | case bsontype.Null: |
| 460 | err = vw.WriteNull() |
| 461 | case bsontype.Regex: |
| 462 | err = vw.WriteRegex(val.Regex()) |
| 463 | case bsontype.DBPointer: |
| 464 | err = vw.WriteDBPointer(val.DBPointer()) |
| 465 | case bsontype.JavaScript: |
| 466 | err = vw.WriteJavascript(val.JavaScript()) |
| 467 | case bsontype.Symbol: |
| 468 | err = vw.WriteSymbol(val.Symbol()) |
| 469 | case bsontype.CodeWithScope: |
| 470 | code, scope := val.CodeWithScope() |
| 471 | |
| 472 | var cwsw bsonrw.DocumentWriter |
| 473 | cwsw, err = vw.WriteCodeWithScope(code) |
| 474 | if err != nil { |
| 475 | break |
| 476 | } |
| 477 | |
| 478 | err = pc.encodeDocument(ec, cwsw, scope) |
| 479 | case bsontype.Int32: |
| 480 | err = vw.WriteInt32(val.Int32()) |
| 481 | case bsontype.Timestamp: |
| 482 | err = vw.WriteTimestamp(val.Timestamp()) |
| 483 | case bsontype.Int64: |
| 484 | err = vw.WriteInt64(val.Int64()) |
| 485 | case bsontype.Decimal128: |
| 486 | err = vw.WriteDecimal128(val.Decimal128()) |
| 487 | case bsontype.MinKey: |
| 488 | err = vw.WriteMinKey() |
| 489 | case bsontype.MaxKey: |
| 490 | err = vw.WriteMaxKey() |
| 491 | default: |
| 492 | err = fmt.Errorf("%T is not a valid BSON type to encode", val.Type()) |
| 493 | } |
| 494 | |
| 495 | return err |
| 496 | } |
| 497 | |
| 498 | func (pc PrimitiveCodecs) valueDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val *Val) error { |
| 499 | switch vr.Type() { |
| 500 | case bsontype.Double: |
| 501 | f64, err := vr.ReadDouble() |
| 502 | if err != nil { |
| 503 | return err |
| 504 | } |
| 505 | *val = Double(f64) |
| 506 | case bsontype.String: |
| 507 | str, err := vr.ReadString() |
| 508 | if err != nil { |
| 509 | return err |
| 510 | } |
| 511 | *val = String(str) |
| 512 | case bsontype.EmbeddedDocument: |
| 513 | var embeddedDoc Doc |
| 514 | err := pc.documentDecodeValue(dc, vr, &embeddedDoc) |
| 515 | if err != nil { |
| 516 | return err |
| 517 | } |
| 518 | *val = Document(embeddedDoc) |
| 519 | case bsontype.Array: |
| 520 | arr := reflect.New(tArray).Elem() |
| 521 | err := pc.ArrayDecodeValue(dc, vr, arr) |
| 522 | if err != nil { |
| 523 | return err |
| 524 | } |
| 525 | *val = Array(arr.Interface().(Arr)) |
| 526 | case bsontype.Binary: |
| 527 | data, subtype, err := vr.ReadBinary() |
| 528 | if err != nil { |
| 529 | return err |
| 530 | } |
| 531 | *val = Binary(subtype, data) |
| 532 | case bsontype.Undefined: |
| 533 | err := vr.ReadUndefined() |
| 534 | if err != nil { |
| 535 | return err |
| 536 | } |
| 537 | *val = Undefined() |
| 538 | case bsontype.ObjectID: |
| 539 | oid, err := vr.ReadObjectID() |
| 540 | if err != nil { |
| 541 | return err |
| 542 | } |
| 543 | *val = ObjectID(oid) |
| 544 | case bsontype.Boolean: |
| 545 | b, err := vr.ReadBoolean() |
| 546 | if err != nil { |
| 547 | return err |
| 548 | } |
| 549 | *val = Boolean(b) |
| 550 | case bsontype.DateTime: |
| 551 | dt, err := vr.ReadDateTime() |
| 552 | if err != nil { |
| 553 | return err |
| 554 | } |
| 555 | *val = DateTime(dt) |
| 556 | case bsontype.Null: |
| 557 | err := vr.ReadNull() |
| 558 | if err != nil { |
| 559 | return err |
| 560 | } |
| 561 | *val = Null() |
| 562 | case bsontype.Regex: |
| 563 | pattern, options, err := vr.ReadRegex() |
| 564 | if err != nil { |
| 565 | return err |
| 566 | } |
| 567 | *val = Regex(pattern, options) |
| 568 | case bsontype.DBPointer: |
| 569 | ns, pointer, err := vr.ReadDBPointer() |
| 570 | if err != nil { |
| 571 | return err |
| 572 | } |
| 573 | *val = DBPointer(ns, pointer) |
| 574 | case bsontype.JavaScript: |
| 575 | js, err := vr.ReadJavascript() |
| 576 | if err != nil { |
| 577 | return err |
| 578 | } |
| 579 | *val = JavaScript(js) |
| 580 | case bsontype.Symbol: |
| 581 | symbol, err := vr.ReadSymbol() |
| 582 | if err != nil { |
| 583 | return err |
| 584 | } |
| 585 | *val = Symbol(symbol) |
| 586 | case bsontype.CodeWithScope: |
| 587 | code, scope, err := vr.ReadCodeWithScope() |
| 588 | if err != nil { |
| 589 | return err |
| 590 | } |
| 591 | var scopeDoc Doc |
| 592 | err = pc.decodeDocument(dc, scope, &scopeDoc) |
| 593 | if err != nil { |
| 594 | return err |
| 595 | } |
| 596 | *val = CodeWithScope(code, scopeDoc) |
| 597 | case bsontype.Int32: |
| 598 | i32, err := vr.ReadInt32() |
| 599 | if err != nil { |
| 600 | return err |
| 601 | } |
| 602 | *val = Int32(i32) |
| 603 | case bsontype.Timestamp: |
| 604 | t, i, err := vr.ReadTimestamp() |
| 605 | if err != nil { |
| 606 | return err |
| 607 | } |
| 608 | *val = Timestamp(t, i) |
| 609 | case bsontype.Int64: |
| 610 | i64, err := vr.ReadInt64() |
| 611 | if err != nil { |
| 612 | return err |
| 613 | } |
| 614 | *val = Int64(i64) |
| 615 | case bsontype.Decimal128: |
| 616 | d128, err := vr.ReadDecimal128() |
| 617 | if err != nil { |
| 618 | return err |
| 619 | } |
| 620 | *val = Decimal128(d128) |
| 621 | case bsontype.MinKey: |
| 622 | err := vr.ReadMinKey() |
| 623 | if err != nil { |
| 624 | return err |
| 625 | } |
| 626 | *val = MinKey() |
| 627 | case bsontype.MaxKey: |
| 628 | err := vr.ReadMaxKey() |
| 629 | if err != nil { |
| 630 | return err |
| 631 | } |
| 632 | *val = MaxKey() |
| 633 | default: |
| 634 | return fmt.Errorf("Cannot read unknown BSON type %s", vr.Type()) |
| 635 | } |
| 636 | |
| 637 | return nil |
| 638 | } |