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Diffstat (limited to 'vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/default_value_decoders.go')
-rw-r--r--vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/default_value_decoders.go1729
1 files changed, 1729 insertions, 0 deletions
diff --git a/vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/default_value_decoders.go b/vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/default_value_decoders.go
new file mode 100644
index 000000000..e95cab585
--- /dev/null
+++ b/vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/default_value_decoders.go
@@ -0,0 +1,1729 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+ "encoding/json"
+ "errors"
+ "fmt"
+ "math"
+ "net/url"
+ "reflect"
+ "strconv"
+ "time"
+
+ "go.mongodb.org/mongo-driver/bson/bsonrw"
+ "go.mongodb.org/mongo-driver/bson/bsontype"
+ "go.mongodb.org/mongo-driver/bson/primitive"
+ "go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
+)
+
+var (
+ defaultValueDecoders DefaultValueDecoders
+ errCannotTruncate = errors.New("float64 can only be truncated to an integer type when truncation is enabled")
+)
+
+type decodeBinaryError struct {
+ subtype byte
+ typeName string
+}
+
+func (d decodeBinaryError) Error() string {
+ return fmt.Sprintf("only binary values with subtype 0x00 or 0x02 can be decoded into %s, but got subtype %v", d.typeName, d.subtype)
+}
+
+func newDefaultStructCodec() *StructCodec {
+ codec, err := NewStructCodec(DefaultStructTagParser)
+ if err != nil {
+ // This function is called from the codec registration path, so errors can't be propagated. If there's an error
+ // constructing the StructCodec, we panic to avoid losing it.
+ panic(fmt.Errorf("error creating default StructCodec: %v", err))
+ }
+ return codec
+}
+
+// DefaultValueDecoders is a namespace type for the default ValueDecoders used
+// when creating a registry.
+type DefaultValueDecoders struct{}
+
+// RegisterDefaultDecoders will register the decoder methods attached to DefaultValueDecoders with
+// the provided RegistryBuilder.
+//
+// There is no support for decoding map[string]interface{} because there is no decoder for
+// interface{}, so users must either register this decoder themselves or use the
+// EmptyInterfaceDecoder available in the bson package.
+func (dvd DefaultValueDecoders) RegisterDefaultDecoders(rb *RegistryBuilder) {
+ if rb == nil {
+ panic(errors.New("argument to RegisterDefaultDecoders must not be nil"))
+ }
+
+ intDecoder := decodeAdapter{dvd.IntDecodeValue, dvd.intDecodeType}
+ floatDecoder := decodeAdapter{dvd.FloatDecodeValue, dvd.floatDecodeType}
+
+ rb.
+ RegisterTypeDecoder(tD, ValueDecoderFunc(dvd.DDecodeValue)).
+ RegisterTypeDecoder(tBinary, decodeAdapter{dvd.BinaryDecodeValue, dvd.binaryDecodeType}).
+ RegisterTypeDecoder(tUndefined, decodeAdapter{dvd.UndefinedDecodeValue, dvd.undefinedDecodeType}).
+ RegisterTypeDecoder(tDateTime, decodeAdapter{dvd.DateTimeDecodeValue, dvd.dateTimeDecodeType}).
+ RegisterTypeDecoder(tNull, decodeAdapter{dvd.NullDecodeValue, dvd.nullDecodeType}).
+ RegisterTypeDecoder(tRegex, decodeAdapter{dvd.RegexDecodeValue, dvd.regexDecodeType}).
+ RegisterTypeDecoder(tDBPointer, decodeAdapter{dvd.DBPointerDecodeValue, dvd.dBPointerDecodeType}).
+ RegisterTypeDecoder(tTimestamp, decodeAdapter{dvd.TimestampDecodeValue, dvd.timestampDecodeType}).
+ RegisterTypeDecoder(tMinKey, decodeAdapter{dvd.MinKeyDecodeValue, dvd.minKeyDecodeType}).
+ RegisterTypeDecoder(tMaxKey, decodeAdapter{dvd.MaxKeyDecodeValue, dvd.maxKeyDecodeType}).
+ RegisterTypeDecoder(tJavaScript, decodeAdapter{dvd.JavaScriptDecodeValue, dvd.javaScriptDecodeType}).
+ RegisterTypeDecoder(tSymbol, decodeAdapter{dvd.SymbolDecodeValue, dvd.symbolDecodeType}).
+ RegisterTypeDecoder(tByteSlice, defaultByteSliceCodec).
+ RegisterTypeDecoder(tTime, defaultTimeCodec).
+ RegisterTypeDecoder(tEmpty, defaultEmptyInterfaceCodec).
+ RegisterTypeDecoder(tCoreArray, defaultArrayCodec).
+ RegisterTypeDecoder(tOID, decodeAdapter{dvd.ObjectIDDecodeValue, dvd.objectIDDecodeType}).
+ RegisterTypeDecoder(tDecimal, decodeAdapter{dvd.Decimal128DecodeValue, dvd.decimal128DecodeType}).
+ RegisterTypeDecoder(tJSONNumber, decodeAdapter{dvd.JSONNumberDecodeValue, dvd.jsonNumberDecodeType}).
+ RegisterTypeDecoder(tURL, decodeAdapter{dvd.URLDecodeValue, dvd.urlDecodeType}).
+ RegisterTypeDecoder(tCoreDocument, ValueDecoderFunc(dvd.CoreDocumentDecodeValue)).
+ RegisterTypeDecoder(tCodeWithScope, decodeAdapter{dvd.CodeWithScopeDecodeValue, dvd.codeWithScopeDecodeType}).
+ RegisterDefaultDecoder(reflect.Bool, decodeAdapter{dvd.BooleanDecodeValue, dvd.booleanDecodeType}).
+ RegisterDefaultDecoder(reflect.Int, intDecoder).
+ RegisterDefaultDecoder(reflect.Int8, intDecoder).
+ RegisterDefaultDecoder(reflect.Int16, intDecoder).
+ RegisterDefaultDecoder(reflect.Int32, intDecoder).
+ RegisterDefaultDecoder(reflect.Int64, intDecoder).
+ RegisterDefaultDecoder(reflect.Uint, defaultUIntCodec).
+ RegisterDefaultDecoder(reflect.Uint8, defaultUIntCodec).
+ RegisterDefaultDecoder(reflect.Uint16, defaultUIntCodec).
+ RegisterDefaultDecoder(reflect.Uint32, defaultUIntCodec).
+ RegisterDefaultDecoder(reflect.Uint64, defaultUIntCodec).
+ RegisterDefaultDecoder(reflect.Float32, floatDecoder).
+ RegisterDefaultDecoder(reflect.Float64, floatDecoder).
+ RegisterDefaultDecoder(reflect.Array, ValueDecoderFunc(dvd.ArrayDecodeValue)).
+ RegisterDefaultDecoder(reflect.Map, defaultMapCodec).
+ RegisterDefaultDecoder(reflect.Slice, defaultSliceCodec).
+ RegisterDefaultDecoder(reflect.String, defaultStringCodec).
+ RegisterDefaultDecoder(reflect.Struct, newDefaultStructCodec()).
+ RegisterDefaultDecoder(reflect.Ptr, NewPointerCodec()).
+ RegisterTypeMapEntry(bsontype.Double, tFloat64).
+ RegisterTypeMapEntry(bsontype.String, tString).
+ RegisterTypeMapEntry(bsontype.Array, tA).
+ RegisterTypeMapEntry(bsontype.Binary, tBinary).
+ RegisterTypeMapEntry(bsontype.Undefined, tUndefined).
+ RegisterTypeMapEntry(bsontype.ObjectID, tOID).
+ RegisterTypeMapEntry(bsontype.Boolean, tBool).
+ RegisterTypeMapEntry(bsontype.DateTime, tDateTime).
+ RegisterTypeMapEntry(bsontype.Regex, tRegex).
+ RegisterTypeMapEntry(bsontype.DBPointer, tDBPointer).
+ RegisterTypeMapEntry(bsontype.JavaScript, tJavaScript).
+ RegisterTypeMapEntry(bsontype.Symbol, tSymbol).
+ RegisterTypeMapEntry(bsontype.CodeWithScope, tCodeWithScope).
+ RegisterTypeMapEntry(bsontype.Int32, tInt32).
+ RegisterTypeMapEntry(bsontype.Int64, tInt64).
+ RegisterTypeMapEntry(bsontype.Timestamp, tTimestamp).
+ RegisterTypeMapEntry(bsontype.Decimal128, tDecimal).
+ RegisterTypeMapEntry(bsontype.MinKey, tMinKey).
+ RegisterTypeMapEntry(bsontype.MaxKey, tMaxKey).
+ RegisterTypeMapEntry(bsontype.Type(0), tD).
+ RegisterTypeMapEntry(bsontype.EmbeddedDocument, tD).
+ RegisterHookDecoder(tValueUnmarshaler, ValueDecoderFunc(dvd.ValueUnmarshalerDecodeValue)).
+ RegisterHookDecoder(tUnmarshaler, ValueDecoderFunc(dvd.UnmarshalerDecodeValue))
+}
+
+// DDecodeValue is the ValueDecoderFunc for primitive.D instances.
+func (dvd DefaultValueDecoders) DDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.IsValid() || !val.CanSet() || val.Type() != tD {
+ return ValueDecoderError{Name: "DDecodeValue", Kinds: []reflect.Kind{reflect.Slice}, Received: val}
+ }
+
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Type(0), bsontype.EmbeddedDocument:
+ dc.Ancestor = tD
+ case bsontype.Null:
+ val.Set(reflect.Zero(val.Type()))
+ return vr.ReadNull()
+ default:
+ return fmt.Errorf("cannot decode %v into a primitive.D", vrType)
+ }
+
+ dr, err := vr.ReadDocument()
+ if err != nil {
+ return err
+ }
+
+ decoder, err := dc.LookupDecoder(tEmpty)
+ if err != nil {
+ return err
+ }
+ tEmptyTypeDecoder, _ := decoder.(typeDecoder)
+
+ // Use the elements in the provided value if it's non nil. Otherwise, allocate a new D instance.
+ var elems primitive.D
+ if !val.IsNil() {
+ val.SetLen(0)
+ elems = val.Interface().(primitive.D)
+ } else {
+ elems = make(primitive.D, 0)
+ }
+
+ for {
+ key, elemVr, err := dr.ReadElement()
+ if err == bsonrw.ErrEOD {
+ break
+ } else if err != nil {
+ return err
+ }
+
+ // Pass false for convert because we don't need to call reflect.Value.Convert for tEmpty.
+ elem, err := decodeTypeOrValueWithInfo(decoder, tEmptyTypeDecoder, dc, elemVr, tEmpty, false)
+ if err != nil {
+ return err
+ }
+
+ elems = append(elems, primitive.E{Key: key, Value: elem.Interface()})
+ }
+
+ val.Set(reflect.ValueOf(elems))
+ return nil
+}
+
+func (dvd DefaultValueDecoders) booleanDecodeType(dctx DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t.Kind() != reflect.Bool {
+ return emptyValue, ValueDecoderError{
+ Name: "BooleanDecodeValue",
+ Kinds: []reflect.Kind{reflect.Bool},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var b bool
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Int32:
+ i32, err := vr.ReadInt32()
+ if err != nil {
+ return emptyValue, err
+ }
+ b = (i32 != 0)
+ case bsontype.Int64:
+ i64, err := vr.ReadInt64()
+ if err != nil {
+ return emptyValue, err
+ }
+ b = (i64 != 0)
+ case bsontype.Double:
+ f64, err := vr.ReadDouble()
+ if err != nil {
+ return emptyValue, err
+ }
+ b = (f64 != 0)
+ case bsontype.Boolean:
+ b, err = vr.ReadBoolean()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a boolean", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(b), nil
+}
+
+// BooleanDecodeValue is the ValueDecoderFunc for bool types.
+func (dvd DefaultValueDecoders) BooleanDecodeValue(dctx DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.IsValid() || !val.CanSet() || val.Kind() != reflect.Bool {
+ return ValueDecoderError{Name: "BooleanDecodeValue", Kinds: []reflect.Kind{reflect.Bool}, Received: val}
+ }
+
+ elem, err := dvd.booleanDecodeType(dctx, vr, val.Type())
+ if err != nil {
+ return err
+ }
+
+ val.SetBool(elem.Bool())
+ return nil
+}
+
+func (DefaultValueDecoders) intDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ var i64 int64
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Int32:
+ i32, err := vr.ReadInt32()
+ if err != nil {
+ return emptyValue, err
+ }
+ i64 = int64(i32)
+ case bsontype.Int64:
+ i64, err = vr.ReadInt64()
+ if err != nil {
+ return emptyValue, err
+ }
+ case bsontype.Double:
+ f64, err := vr.ReadDouble()
+ if err != nil {
+ return emptyValue, err
+ }
+ if !dc.Truncate && math.Floor(f64) != f64 {
+ return emptyValue, errCannotTruncate
+ }
+ if f64 > float64(math.MaxInt64) {
+ return emptyValue, fmt.Errorf("%g overflows int64", f64)
+ }
+ i64 = int64(f64)
+ case bsontype.Boolean:
+ b, err := vr.ReadBoolean()
+ if err != nil {
+ return emptyValue, err
+ }
+ if b {
+ i64 = 1
+ }
+ case bsontype.Null:
+ if err = vr.ReadNull(); err != nil {
+ return emptyValue, err
+ }
+ case bsontype.Undefined:
+ if err = vr.ReadUndefined(); err != nil {
+ return emptyValue, err
+ }
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into an integer type", vrType)
+ }
+
+ switch t.Kind() {
+ case reflect.Int8:
+ if i64 < math.MinInt8 || i64 > math.MaxInt8 {
+ return emptyValue, fmt.Errorf("%d overflows int8", i64)
+ }
+
+ return reflect.ValueOf(int8(i64)), nil
+ case reflect.Int16:
+ if i64 < math.MinInt16 || i64 > math.MaxInt16 {
+ return emptyValue, fmt.Errorf("%d overflows int16", i64)
+ }
+
+ return reflect.ValueOf(int16(i64)), nil
+ case reflect.Int32:
+ if i64 < math.MinInt32 || i64 > math.MaxInt32 {
+ return emptyValue, fmt.Errorf("%d overflows int32", i64)
+ }
+
+ return reflect.ValueOf(int32(i64)), nil
+ case reflect.Int64:
+ return reflect.ValueOf(i64), nil
+ case reflect.Int:
+ if int64(int(i64)) != i64 { // Can we fit this inside of an int
+ return emptyValue, fmt.Errorf("%d overflows int", i64)
+ }
+
+ return reflect.ValueOf(int(i64)), nil
+ default:
+ return emptyValue, ValueDecoderError{
+ Name: "IntDecodeValue",
+ Kinds: []reflect.Kind{reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int},
+ Received: reflect.Zero(t),
+ }
+ }
+}
+
+// IntDecodeValue is the ValueDecoderFunc for int types.
+func (dvd DefaultValueDecoders) IntDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() {
+ return ValueDecoderError{
+ Name: "IntDecodeValue",
+ Kinds: []reflect.Kind{reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int},
+ Received: val,
+ }
+ }
+
+ elem, err := dvd.intDecodeType(dc, vr, val.Type())
+ if err != nil {
+ return err
+ }
+
+ val.SetInt(elem.Int())
+ return nil
+}
+
+// UintDecodeValue is the ValueDecoderFunc for uint types.
+//
+// Deprecated: UintDecodeValue is not registered by default. Use UintCodec.DecodeValue instead.
+func (dvd DefaultValueDecoders) UintDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ var i64 int64
+ var err error
+ switch vr.Type() {
+ case bsontype.Int32:
+ i32, err := vr.ReadInt32()
+ if err != nil {
+ return err
+ }
+ i64 = int64(i32)
+ case bsontype.Int64:
+ i64, err = vr.ReadInt64()
+ if err != nil {
+ return err
+ }
+ case bsontype.Double:
+ f64, err := vr.ReadDouble()
+ if err != nil {
+ return err
+ }
+ if !dc.Truncate && math.Floor(f64) != f64 {
+ return errors.New("UintDecodeValue can only truncate float64 to an integer type when truncation is enabled")
+ }
+ if f64 > float64(math.MaxInt64) {
+ return fmt.Errorf("%g overflows int64", f64)
+ }
+ i64 = int64(f64)
+ case bsontype.Boolean:
+ b, err := vr.ReadBoolean()
+ if err != nil {
+ return err
+ }
+ if b {
+ i64 = 1
+ }
+ default:
+ return fmt.Errorf("cannot decode %v into an integer type", vr.Type())
+ }
+
+ if !val.CanSet() {
+ return ValueDecoderError{
+ Name: "UintDecodeValue",
+ Kinds: []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
+ Received: val,
+ }
+ }
+
+ switch val.Kind() {
+ case reflect.Uint8:
+ if i64 < 0 || i64 > math.MaxUint8 {
+ return fmt.Errorf("%d overflows uint8", i64)
+ }
+ case reflect.Uint16:
+ if i64 < 0 || i64 > math.MaxUint16 {
+ return fmt.Errorf("%d overflows uint16", i64)
+ }
+ case reflect.Uint32:
+ if i64 < 0 || i64 > math.MaxUint32 {
+ return fmt.Errorf("%d overflows uint32", i64)
+ }
+ case reflect.Uint64:
+ if i64 < 0 {
+ return fmt.Errorf("%d overflows uint64", i64)
+ }
+ case reflect.Uint:
+ if i64 < 0 || int64(uint(i64)) != i64 { // Can we fit this inside of an uint
+ return fmt.Errorf("%d overflows uint", i64)
+ }
+ default:
+ return ValueDecoderError{
+ Name: "UintDecodeValue",
+ Kinds: []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
+ Received: val,
+ }
+ }
+
+ val.SetUint(uint64(i64))
+ return nil
+}
+
+func (dvd DefaultValueDecoders) floatDecodeType(ec DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ var f float64
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Int32:
+ i32, err := vr.ReadInt32()
+ if err != nil {
+ return emptyValue, err
+ }
+ f = float64(i32)
+ case bsontype.Int64:
+ i64, err := vr.ReadInt64()
+ if err != nil {
+ return emptyValue, err
+ }
+ f = float64(i64)
+ case bsontype.Double:
+ f, err = vr.ReadDouble()
+ if err != nil {
+ return emptyValue, err
+ }
+ case bsontype.Boolean:
+ b, err := vr.ReadBoolean()
+ if err != nil {
+ return emptyValue, err
+ }
+ if b {
+ f = 1
+ }
+ case bsontype.Null:
+ if err = vr.ReadNull(); err != nil {
+ return emptyValue, err
+ }
+ case bsontype.Undefined:
+ if err = vr.ReadUndefined(); err != nil {
+ return emptyValue, err
+ }
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a float32 or float64 type", vrType)
+ }
+
+ switch t.Kind() {
+ case reflect.Float32:
+ if !ec.Truncate && float64(float32(f)) != f {
+ return emptyValue, errCannotTruncate
+ }
+
+ return reflect.ValueOf(float32(f)), nil
+ case reflect.Float64:
+ return reflect.ValueOf(f), nil
+ default:
+ return emptyValue, ValueDecoderError{
+ Name: "FloatDecodeValue",
+ Kinds: []reflect.Kind{reflect.Float32, reflect.Float64},
+ Received: reflect.Zero(t),
+ }
+ }
+}
+
+// FloatDecodeValue is the ValueDecoderFunc for float types.
+func (dvd DefaultValueDecoders) FloatDecodeValue(ec DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() {
+ return ValueDecoderError{
+ Name: "FloatDecodeValue",
+ Kinds: []reflect.Kind{reflect.Float32, reflect.Float64},
+ Received: val,
+ }
+ }
+
+ elem, err := dvd.floatDecodeType(ec, vr, val.Type())
+ if err != nil {
+ return err
+ }
+
+ val.SetFloat(elem.Float())
+ return nil
+}
+
+// StringDecodeValue is the ValueDecoderFunc for string types.
+//
+// Deprecated: StringDecodeValue is not registered by default. Use StringCodec.DecodeValue instead.
+func (dvd DefaultValueDecoders) StringDecodeValue(dctx DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ var str string
+ var err error
+ switch vr.Type() {
+ // TODO(GODRIVER-577): Handle JavaScript and Symbol BSON types when allowed.
+ case bsontype.String:
+ str, err = vr.ReadString()
+ if err != nil {
+ return err
+ }
+ default:
+ return fmt.Errorf("cannot decode %v into a string type", vr.Type())
+ }
+ if !val.CanSet() || val.Kind() != reflect.String {
+ return ValueDecoderError{Name: "StringDecodeValue", Kinds: []reflect.Kind{reflect.String}, Received: val}
+ }
+
+ val.SetString(str)
+ return nil
+}
+
+func (DefaultValueDecoders) javaScriptDecodeType(dctx DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tJavaScript {
+ return emptyValue, ValueDecoderError{
+ Name: "JavaScriptDecodeValue",
+ Types: []reflect.Type{tJavaScript},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var js string
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.JavaScript:
+ js, err = vr.ReadJavascript()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a primitive.JavaScript", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.JavaScript(js)), nil
+}
+
+// JavaScriptDecodeValue is the ValueDecoderFunc for the primitive.JavaScript type.
+func (dvd DefaultValueDecoders) JavaScriptDecodeValue(dctx DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tJavaScript {
+ return ValueDecoderError{Name: "JavaScriptDecodeValue", Types: []reflect.Type{tJavaScript}, Received: val}
+ }
+
+ elem, err := dvd.javaScriptDecodeType(dctx, vr, tJavaScript)
+ if err != nil {
+ return err
+ }
+
+ val.SetString(elem.String())
+ return nil
+}
+
+func (DefaultValueDecoders) symbolDecodeType(dctx DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tSymbol {
+ return emptyValue, ValueDecoderError{
+ Name: "SymbolDecodeValue",
+ Types: []reflect.Type{tSymbol},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var symbol string
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.String:
+ symbol, err = vr.ReadString()
+ case bsontype.Symbol:
+ symbol, err = vr.ReadSymbol()
+ case bsontype.Binary:
+ data, subtype, err := vr.ReadBinary()
+ if err != nil {
+ return emptyValue, err
+ }
+
+ if subtype != bsontype.BinaryGeneric && subtype != bsontype.BinaryBinaryOld {
+ return emptyValue, decodeBinaryError{subtype: subtype, typeName: "primitive.Symbol"}
+ }
+ symbol = string(data)
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a primitive.Symbol", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.Symbol(symbol)), nil
+}
+
+// SymbolDecodeValue is the ValueDecoderFunc for the primitive.Symbol type.
+func (dvd DefaultValueDecoders) SymbolDecodeValue(dctx DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tSymbol {
+ return ValueDecoderError{Name: "SymbolDecodeValue", Types: []reflect.Type{tSymbol}, Received: val}
+ }
+
+ elem, err := dvd.symbolDecodeType(dctx, vr, tSymbol)
+ if err != nil {
+ return err
+ }
+
+ val.SetString(elem.String())
+ return nil
+}
+
+func (DefaultValueDecoders) binaryDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tBinary {
+ return emptyValue, ValueDecoderError{
+ Name: "BinaryDecodeValue",
+ Types: []reflect.Type{tBinary},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var data []byte
+ var subtype byte
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Binary:
+ data, subtype, err = vr.ReadBinary()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a Binary", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.Binary{Subtype: subtype, Data: data}), nil
+}
+
+// BinaryDecodeValue is the ValueDecoderFunc for Binary.
+func (dvd DefaultValueDecoders) BinaryDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tBinary {
+ return ValueDecoderError{Name: "BinaryDecodeValue", Types: []reflect.Type{tBinary}, Received: val}
+ }
+
+ elem, err := dvd.binaryDecodeType(dc, vr, tBinary)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (DefaultValueDecoders) undefinedDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tUndefined {
+ return emptyValue, ValueDecoderError{
+ Name: "UndefinedDecodeValue",
+ Types: []reflect.Type{tUndefined},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into an Undefined", vr.Type())
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.Undefined{}), nil
+}
+
+// UndefinedDecodeValue is the ValueDecoderFunc for Undefined.
+func (dvd DefaultValueDecoders) UndefinedDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tUndefined {
+ return ValueDecoderError{Name: "UndefinedDecodeValue", Types: []reflect.Type{tUndefined}, Received: val}
+ }
+
+ elem, err := dvd.undefinedDecodeType(dc, vr, tUndefined)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+// Accept both 12-byte string and pretty-printed 24-byte hex string formats.
+func (dvd DefaultValueDecoders) objectIDDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tOID {
+ return emptyValue, ValueDecoderError{
+ Name: "ObjectIDDecodeValue",
+ Types: []reflect.Type{tOID},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var oid primitive.ObjectID
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.ObjectID:
+ oid, err = vr.ReadObjectID()
+ if err != nil {
+ return emptyValue, err
+ }
+ case bsontype.String:
+ str, err := vr.ReadString()
+ if err != nil {
+ return emptyValue, err
+ }
+ if oid, err = primitive.ObjectIDFromHex(str); err == nil {
+ break
+ }
+ if len(str) != 12 {
+ return emptyValue, fmt.Errorf("an ObjectID string must be exactly 12 bytes long (got %v)", len(str))
+ }
+ byteArr := []byte(str)
+ copy(oid[:], byteArr)
+ case bsontype.Null:
+ if err = vr.ReadNull(); err != nil {
+ return emptyValue, err
+ }
+ case bsontype.Undefined:
+ if err = vr.ReadUndefined(); err != nil {
+ return emptyValue, err
+ }
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into an ObjectID", vrType)
+ }
+
+ return reflect.ValueOf(oid), nil
+}
+
+// ObjectIDDecodeValue is the ValueDecoderFunc for primitive.ObjectID.
+func (dvd DefaultValueDecoders) ObjectIDDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tOID {
+ return ValueDecoderError{Name: "ObjectIDDecodeValue", Types: []reflect.Type{tOID}, Received: val}
+ }
+
+ elem, err := dvd.objectIDDecodeType(dc, vr, tOID)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (DefaultValueDecoders) dateTimeDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tDateTime {
+ return emptyValue, ValueDecoderError{
+ Name: "DateTimeDecodeValue",
+ Types: []reflect.Type{tDateTime},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var dt int64
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.DateTime:
+ dt, err = vr.ReadDateTime()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a DateTime", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.DateTime(dt)), nil
+}
+
+// DateTimeDecodeValue is the ValueDecoderFunc for DateTime.
+func (dvd DefaultValueDecoders) DateTimeDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tDateTime {
+ return ValueDecoderError{Name: "DateTimeDecodeValue", Types: []reflect.Type{tDateTime}, Received: val}
+ }
+
+ elem, err := dvd.dateTimeDecodeType(dc, vr, tDateTime)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (DefaultValueDecoders) nullDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tNull {
+ return emptyValue, ValueDecoderError{
+ Name: "NullDecodeValue",
+ Types: []reflect.Type{tNull},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a Null", vr.Type())
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.Null{}), nil
+}
+
+// NullDecodeValue is the ValueDecoderFunc for Null.
+func (dvd DefaultValueDecoders) NullDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tNull {
+ return ValueDecoderError{Name: "NullDecodeValue", Types: []reflect.Type{tNull}, Received: val}
+ }
+
+ elem, err := dvd.nullDecodeType(dc, vr, tNull)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (DefaultValueDecoders) regexDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tRegex {
+ return emptyValue, ValueDecoderError{
+ Name: "RegexDecodeValue",
+ Types: []reflect.Type{tRegex},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var pattern, options string
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Regex:
+ pattern, options, err = vr.ReadRegex()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a Regex", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.Regex{Pattern: pattern, Options: options}), nil
+}
+
+// RegexDecodeValue is the ValueDecoderFunc for Regex.
+func (dvd DefaultValueDecoders) RegexDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tRegex {
+ return ValueDecoderError{Name: "RegexDecodeValue", Types: []reflect.Type{tRegex}, Received: val}
+ }
+
+ elem, err := dvd.regexDecodeType(dc, vr, tRegex)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (DefaultValueDecoders) dBPointerDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tDBPointer {
+ return emptyValue, ValueDecoderError{
+ Name: "DBPointerDecodeValue",
+ Types: []reflect.Type{tDBPointer},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var ns string
+ var pointer primitive.ObjectID
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.DBPointer:
+ ns, pointer, err = vr.ReadDBPointer()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a DBPointer", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.DBPointer{DB: ns, Pointer: pointer}), nil
+}
+
+// DBPointerDecodeValue is the ValueDecoderFunc for DBPointer.
+func (dvd DefaultValueDecoders) DBPointerDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tDBPointer {
+ return ValueDecoderError{Name: "DBPointerDecodeValue", Types: []reflect.Type{tDBPointer}, Received: val}
+ }
+
+ elem, err := dvd.dBPointerDecodeType(dc, vr, tDBPointer)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (DefaultValueDecoders) timestampDecodeType(dc DecodeContext, vr bsonrw.ValueReader, reflectType reflect.Type) (reflect.Value, error) {
+ if reflectType != tTimestamp {
+ return emptyValue, ValueDecoderError{
+ Name: "TimestampDecodeValue",
+ Types: []reflect.Type{tTimestamp},
+ Received: reflect.Zero(reflectType),
+ }
+ }
+
+ var t, incr uint32
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Timestamp:
+ t, incr, err = vr.ReadTimestamp()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a Timestamp", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.Timestamp{T: t, I: incr}), nil
+}
+
+// TimestampDecodeValue is the ValueDecoderFunc for Timestamp.
+func (dvd DefaultValueDecoders) TimestampDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tTimestamp {
+ return ValueDecoderError{Name: "TimestampDecodeValue", Types: []reflect.Type{tTimestamp}, Received: val}
+ }
+
+ elem, err := dvd.timestampDecodeType(dc, vr, tTimestamp)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (DefaultValueDecoders) minKeyDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tMinKey {
+ return emptyValue, ValueDecoderError{
+ Name: "MinKeyDecodeValue",
+ Types: []reflect.Type{tMinKey},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.MinKey:
+ err = vr.ReadMinKey()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a MinKey", vr.Type())
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.MinKey{}), nil
+}
+
+// MinKeyDecodeValue is the ValueDecoderFunc for MinKey.
+func (dvd DefaultValueDecoders) MinKeyDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tMinKey {
+ return ValueDecoderError{Name: "MinKeyDecodeValue", Types: []reflect.Type{tMinKey}, Received: val}
+ }
+
+ elem, err := dvd.minKeyDecodeType(dc, vr, tMinKey)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (DefaultValueDecoders) maxKeyDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tMaxKey {
+ return emptyValue, ValueDecoderError{
+ Name: "MaxKeyDecodeValue",
+ Types: []reflect.Type{tMaxKey},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.MaxKey:
+ err = vr.ReadMaxKey()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a MaxKey", vr.Type())
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(primitive.MaxKey{}), nil
+}
+
+// MaxKeyDecodeValue is the ValueDecoderFunc for MaxKey.
+func (dvd DefaultValueDecoders) MaxKeyDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tMaxKey {
+ return ValueDecoderError{Name: "MaxKeyDecodeValue", Types: []reflect.Type{tMaxKey}, Received: val}
+ }
+
+ elem, err := dvd.maxKeyDecodeType(dc, vr, tMaxKey)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (dvd DefaultValueDecoders) decimal128DecodeType(dctx DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tDecimal {
+ return emptyValue, ValueDecoderError{
+ Name: "Decimal128DecodeValue",
+ Types: []reflect.Type{tDecimal},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var d128 primitive.Decimal128
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Decimal128:
+ d128, err = vr.ReadDecimal128()
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a primitive.Decimal128", vr.Type())
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(d128), nil
+}
+
+// Decimal128DecodeValue is the ValueDecoderFunc for primitive.Decimal128.
+func (dvd DefaultValueDecoders) Decimal128DecodeValue(dctx DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tDecimal {
+ return ValueDecoderError{Name: "Decimal128DecodeValue", Types: []reflect.Type{tDecimal}, Received: val}
+ }
+
+ elem, err := dvd.decimal128DecodeType(dctx, vr, tDecimal)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (dvd DefaultValueDecoders) jsonNumberDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tJSONNumber {
+ return emptyValue, ValueDecoderError{
+ Name: "JSONNumberDecodeValue",
+ Types: []reflect.Type{tJSONNumber},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var jsonNum json.Number
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Double:
+ f64, err := vr.ReadDouble()
+ if err != nil {
+ return emptyValue, err
+ }
+ jsonNum = json.Number(strconv.FormatFloat(f64, 'f', -1, 64))
+ case bsontype.Int32:
+ i32, err := vr.ReadInt32()
+ if err != nil {
+ return emptyValue, err
+ }
+ jsonNum = json.Number(strconv.FormatInt(int64(i32), 10))
+ case bsontype.Int64:
+ i64, err := vr.ReadInt64()
+ if err != nil {
+ return emptyValue, err
+ }
+ jsonNum = json.Number(strconv.FormatInt(i64, 10))
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a json.Number", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(jsonNum), nil
+}
+
+// JSONNumberDecodeValue is the ValueDecoderFunc for json.Number.
+func (dvd DefaultValueDecoders) JSONNumberDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tJSONNumber {
+ return ValueDecoderError{Name: "JSONNumberDecodeValue", Types: []reflect.Type{tJSONNumber}, Received: val}
+ }
+
+ elem, err := dvd.jsonNumberDecodeType(dc, vr, tJSONNumber)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (dvd DefaultValueDecoders) urlDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tURL {
+ return emptyValue, ValueDecoderError{
+ Name: "URLDecodeValue",
+ Types: []reflect.Type{tURL},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ urlPtr := &url.URL{}
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.String:
+ var str string // Declare str here to avoid shadowing err during the ReadString call.
+ str, err = vr.ReadString()
+ if err != nil {
+ return emptyValue, err
+ }
+
+ urlPtr, err = url.Parse(str)
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a *url.URL", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(urlPtr).Elem(), nil
+}
+
+// URLDecodeValue is the ValueDecoderFunc for url.URL.
+func (dvd DefaultValueDecoders) URLDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tURL {
+ return ValueDecoderError{Name: "URLDecodeValue", Types: []reflect.Type{tURL}, Received: val}
+ }
+
+ elem, err := dvd.urlDecodeType(dc, vr, tURL)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+// TimeDecodeValue is the ValueDecoderFunc for time.Time.
+//
+// Deprecated: TimeDecodeValue is not registered by default. Use TimeCodec.DecodeValue instead.
+func (dvd DefaultValueDecoders) TimeDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if vr.Type() != bsontype.DateTime {
+ return fmt.Errorf("cannot decode %v into a time.Time", vr.Type())
+ }
+
+ dt, err := vr.ReadDateTime()
+ if err != nil {
+ return err
+ }
+
+ if !val.CanSet() || val.Type() != tTime {
+ return ValueDecoderError{Name: "TimeDecodeValue", Types: []reflect.Type{tTime}, Received: val}
+ }
+
+ val.Set(reflect.ValueOf(time.Unix(dt/1000, dt%1000*1000000).UTC()))
+ return nil
+}
+
+// ByteSliceDecodeValue is the ValueDecoderFunc for []byte.
+//
+// Deprecated: ByteSliceDecodeValue is not registered by default. Use ByteSliceCodec.DecodeValue instead.
+func (dvd DefaultValueDecoders) ByteSliceDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if vr.Type() != bsontype.Binary && vr.Type() != bsontype.Null {
+ return fmt.Errorf("cannot decode %v into a []byte", vr.Type())
+ }
+
+ if !val.CanSet() || val.Type() != tByteSlice {
+ return ValueDecoderError{Name: "ByteSliceDecodeValue", Types: []reflect.Type{tByteSlice}, Received: val}
+ }
+
+ if vr.Type() == bsontype.Null {
+ val.Set(reflect.Zero(val.Type()))
+ return vr.ReadNull()
+ }
+
+ data, subtype, err := vr.ReadBinary()
+ if err != nil {
+ return err
+ }
+ if subtype != 0x00 {
+ return fmt.Errorf("ByteSliceDecodeValue can only be used to decode subtype 0x00 for %s, got %v", bsontype.Binary, subtype)
+ }
+
+ val.Set(reflect.ValueOf(data))
+ return nil
+}
+
+// MapDecodeValue is the ValueDecoderFunc for map[string]* types.
+//
+// Deprecated: MapDecodeValue is not registered by default. Use MapCodec.DecodeValue instead.
+func (dvd DefaultValueDecoders) MapDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Kind() != reflect.Map || val.Type().Key().Kind() != reflect.String {
+ return ValueDecoderError{Name: "MapDecodeValue", Kinds: []reflect.Kind{reflect.Map}, Received: val}
+ }
+
+ switch vr.Type() {
+ case bsontype.Type(0), bsontype.EmbeddedDocument:
+ case bsontype.Null:
+ val.Set(reflect.Zero(val.Type()))
+ return vr.ReadNull()
+ default:
+ return fmt.Errorf("cannot decode %v into a %s", vr.Type(), val.Type())
+ }
+
+ dr, err := vr.ReadDocument()
+ if err != nil {
+ return err
+ }
+
+ if val.IsNil() {
+ val.Set(reflect.MakeMap(val.Type()))
+ }
+
+ eType := val.Type().Elem()
+ decoder, err := dc.LookupDecoder(eType)
+ if err != nil {
+ return err
+ }
+
+ if eType == tEmpty {
+ dc.Ancestor = val.Type()
+ }
+
+ keyType := val.Type().Key()
+ for {
+ key, vr, err := dr.ReadElement()
+ if err == bsonrw.ErrEOD {
+ break
+ }
+ if err != nil {
+ return err
+ }
+
+ elem := reflect.New(eType).Elem()
+
+ err = decoder.DecodeValue(dc, vr, elem)
+ if err != nil {
+ return err
+ }
+
+ val.SetMapIndex(reflect.ValueOf(key).Convert(keyType), elem)
+ }
+ return nil
+}
+
+// ArrayDecodeValue is the ValueDecoderFunc for array types.
+func (dvd DefaultValueDecoders) ArrayDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.IsValid() || val.Kind() != reflect.Array {
+ return ValueDecoderError{Name: "ArrayDecodeValue", Kinds: []reflect.Kind{reflect.Array}, Received: val}
+ }
+
+ switch vrType := vr.Type(); vrType {
+ case bsontype.Array:
+ case bsontype.Type(0), bsontype.EmbeddedDocument:
+ if val.Type().Elem() != tE {
+ return fmt.Errorf("cannot decode document into %s", val.Type())
+ }
+ case bsontype.Binary:
+ if val.Type().Elem() != tByte {
+ return fmt.Errorf("ArrayDecodeValue can only be used to decode binary into a byte array, got %v", vrType)
+ }
+ data, subtype, err := vr.ReadBinary()
+ if err != nil {
+ return err
+ }
+ if subtype != bsontype.BinaryGeneric && subtype != bsontype.BinaryBinaryOld {
+ return fmt.Errorf("ArrayDecodeValue can only be used to decode subtype 0x00 or 0x02 for %s, got %v", bsontype.Binary, subtype)
+ }
+
+ if len(data) > val.Len() {
+ return fmt.Errorf("more elements returned in array than can fit inside %s", val.Type())
+ }
+
+ for idx, elem := range data {
+ val.Index(idx).Set(reflect.ValueOf(elem))
+ }
+ return nil
+ case bsontype.Null:
+ val.Set(reflect.Zero(val.Type()))
+ return vr.ReadNull()
+ case bsontype.Undefined:
+ val.Set(reflect.Zero(val.Type()))
+ return vr.ReadUndefined()
+ default:
+ return fmt.Errorf("cannot decode %v into an array", vrType)
+ }
+
+ var elemsFunc func(DecodeContext, bsonrw.ValueReader, reflect.Value) ([]reflect.Value, error)
+ switch val.Type().Elem() {
+ case tE:
+ elemsFunc = dvd.decodeD
+ default:
+ elemsFunc = dvd.decodeDefault
+ }
+
+ elems, err := elemsFunc(dc, vr, val)
+ if err != nil {
+ return err
+ }
+
+ if len(elems) > val.Len() {
+ return fmt.Errorf("more elements returned in array than can fit inside %s, got %v elements", val.Type(), len(elems))
+ }
+
+ for idx, elem := range elems {
+ val.Index(idx).Set(elem)
+ }
+
+ return nil
+}
+
+// SliceDecodeValue is the ValueDecoderFunc for slice types.
+//
+// Deprecated: SliceDecodeValue is not registered by default. Use SliceCodec.DecodeValue instead.
+func (dvd DefaultValueDecoders) SliceDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Kind() != reflect.Slice {
+ return ValueDecoderError{Name: "SliceDecodeValue", Kinds: []reflect.Kind{reflect.Slice}, Received: val}
+ }
+
+ switch vr.Type() {
+ case bsontype.Array:
+ case bsontype.Null:
+ val.Set(reflect.Zero(val.Type()))
+ return vr.ReadNull()
+ case bsontype.Type(0), bsontype.EmbeddedDocument:
+ if val.Type().Elem() != tE {
+ return fmt.Errorf("cannot decode document into %s", val.Type())
+ }
+ default:
+ return fmt.Errorf("cannot decode %v into a slice", vr.Type())
+ }
+
+ var elemsFunc func(DecodeContext, bsonrw.ValueReader, reflect.Value) ([]reflect.Value, error)
+ switch val.Type().Elem() {
+ case tE:
+ dc.Ancestor = val.Type()
+ elemsFunc = dvd.decodeD
+ default:
+ elemsFunc = dvd.decodeDefault
+ }
+
+ elems, err := elemsFunc(dc, vr, val)
+ if err != nil {
+ return err
+ }
+
+ if val.IsNil() {
+ val.Set(reflect.MakeSlice(val.Type(), 0, len(elems)))
+ }
+
+ val.SetLen(0)
+ val.Set(reflect.Append(val, elems...))
+
+ return nil
+}
+
+// ValueUnmarshalerDecodeValue is the ValueDecoderFunc for ValueUnmarshaler implementations.
+func (dvd DefaultValueDecoders) ValueUnmarshalerDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.IsValid() || (!val.Type().Implements(tValueUnmarshaler) && !reflect.PtrTo(val.Type()).Implements(tValueUnmarshaler)) {
+ return ValueDecoderError{Name: "ValueUnmarshalerDecodeValue", Types: []reflect.Type{tValueUnmarshaler}, Received: val}
+ }
+
+ if val.Kind() == reflect.Ptr && val.IsNil() {
+ if !val.CanSet() {
+ return ValueDecoderError{Name: "ValueUnmarshalerDecodeValue", Types: []reflect.Type{tValueUnmarshaler}, Received: val}
+ }
+ val.Set(reflect.New(val.Type().Elem()))
+ }
+
+ if !val.Type().Implements(tValueUnmarshaler) {
+ if !val.CanAddr() {
+ return ValueDecoderError{Name: "ValueUnmarshalerDecodeValue", Types: []reflect.Type{tValueUnmarshaler}, Received: val}
+ }
+ val = val.Addr() // If the type doesn't implement the interface, a pointer to it must.
+ }
+
+ t, src, err := bsonrw.Copier{}.CopyValueToBytes(vr)
+ if err != nil {
+ return err
+ }
+
+ fn := val.Convert(tValueUnmarshaler).MethodByName("UnmarshalBSONValue")
+ errVal := fn.Call([]reflect.Value{reflect.ValueOf(t), reflect.ValueOf(src)})[0]
+ if !errVal.IsNil() {
+ return errVal.Interface().(error)
+ }
+ return nil
+}
+
+// UnmarshalerDecodeValue is the ValueDecoderFunc for Unmarshaler implementations.
+func (dvd DefaultValueDecoders) UnmarshalerDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.IsValid() || (!val.Type().Implements(tUnmarshaler) && !reflect.PtrTo(val.Type()).Implements(tUnmarshaler)) {
+ return ValueDecoderError{Name: "UnmarshalerDecodeValue", Types: []reflect.Type{tUnmarshaler}, Received: val}
+ }
+
+ if val.Kind() == reflect.Ptr && val.IsNil() {
+ if !val.CanSet() {
+ return ValueDecoderError{Name: "UnmarshalerDecodeValue", Types: []reflect.Type{tUnmarshaler}, Received: val}
+ }
+ val.Set(reflect.New(val.Type().Elem()))
+ }
+
+ _, src, err := bsonrw.Copier{}.CopyValueToBytes(vr)
+ if err != nil {
+ return err
+ }
+
+ // If the target Go value is a pointer and the BSON field value is empty, set the value to the
+ // zero value of the pointer (nil) and don't call UnmarshalBSON. UnmarshalBSON has no way to
+ // change the pointer value from within the function (only the value at the pointer address),
+ // so it can't set the pointer to "nil" itself. Since the most common Go value for an empty BSON
+ // field value is "nil", we set "nil" here and don't call UnmarshalBSON. This behavior matches
+ // the behavior of the Go "encoding/json" unmarshaler when the target Go value is a pointer and
+ // the JSON field value is "null".
+ if val.Kind() == reflect.Ptr && len(src) == 0 {
+ val.Set(reflect.Zero(val.Type()))
+ return nil
+ }
+
+ if !val.Type().Implements(tUnmarshaler) {
+ if !val.CanAddr() {
+ return ValueDecoderError{Name: "UnmarshalerDecodeValue", Types: []reflect.Type{tUnmarshaler}, Received: val}
+ }
+ val = val.Addr() // If the type doesn't implement the interface, a pointer to it must.
+ }
+
+ fn := val.Convert(tUnmarshaler).MethodByName("UnmarshalBSON")
+ errVal := fn.Call([]reflect.Value{reflect.ValueOf(src)})[0]
+ if !errVal.IsNil() {
+ return errVal.Interface().(error)
+ }
+ return nil
+}
+
+// EmptyInterfaceDecodeValue is the ValueDecoderFunc for interface{}.
+//
+// Deprecated: EmptyInterfaceDecodeValue is not registered by default. Use EmptyInterfaceCodec.DecodeValue instead.
+func (dvd DefaultValueDecoders) EmptyInterfaceDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tEmpty {
+ return ValueDecoderError{Name: "EmptyInterfaceDecodeValue", Types: []reflect.Type{tEmpty}, Received: val}
+ }
+
+ rtype, err := dc.LookupTypeMapEntry(vr.Type())
+ if err != nil {
+ switch vr.Type() {
+ case bsontype.EmbeddedDocument:
+ if dc.Ancestor != nil {
+ rtype = dc.Ancestor
+ break
+ }
+ rtype = tD
+ case bsontype.Null:
+ val.Set(reflect.Zero(val.Type()))
+ return vr.ReadNull()
+ default:
+ return err
+ }
+ }
+
+ decoder, err := dc.LookupDecoder(rtype)
+ if err != nil {
+ return err
+ }
+
+ elem := reflect.New(rtype).Elem()
+ err = decoder.DecodeValue(dc, vr, elem)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+// CoreDocumentDecodeValue is the ValueDecoderFunc for bsoncore.Document.
+func (DefaultValueDecoders) CoreDocumentDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tCoreDocument {
+ return ValueDecoderError{Name: "CoreDocumentDecodeValue", Types: []reflect.Type{tCoreDocument}, Received: val}
+ }
+
+ if val.IsNil() {
+ val.Set(reflect.MakeSlice(val.Type(), 0, 0))
+ }
+
+ val.SetLen(0)
+
+ cdoc, err := bsonrw.Copier{}.AppendDocumentBytes(val.Interface().(bsoncore.Document), vr)
+ val.Set(reflect.ValueOf(cdoc))
+ return err
+}
+
+func (dvd DefaultValueDecoders) decodeDefault(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) ([]reflect.Value, error) {
+ elems := make([]reflect.Value, 0)
+
+ ar, err := vr.ReadArray()
+ if err != nil {
+ return nil, err
+ }
+
+ eType := val.Type().Elem()
+
+ decoder, err := dc.LookupDecoder(eType)
+ if err != nil {
+ return nil, err
+ }
+ eTypeDecoder, _ := decoder.(typeDecoder)
+
+ idx := 0
+ for {
+ vr, err := ar.ReadValue()
+ if err == bsonrw.ErrEOA {
+ break
+ }
+ if err != nil {
+ return nil, err
+ }
+
+ elem, err := decodeTypeOrValueWithInfo(decoder, eTypeDecoder, dc, vr, eType, true)
+ if err != nil {
+ return nil, newDecodeError(strconv.Itoa(idx), err)
+ }
+ elems = append(elems, elem)
+ idx++
+ }
+
+ return elems, nil
+}
+
+func (dvd DefaultValueDecoders) readCodeWithScope(dc DecodeContext, vr bsonrw.ValueReader) (primitive.CodeWithScope, error) {
+ var cws primitive.CodeWithScope
+
+ code, dr, err := vr.ReadCodeWithScope()
+ if err != nil {
+ return cws, err
+ }
+
+ scope := reflect.New(tD).Elem()
+ elems, err := dvd.decodeElemsFromDocumentReader(dc, dr)
+ if err != nil {
+ return cws, err
+ }
+
+ scope.Set(reflect.MakeSlice(tD, 0, len(elems)))
+ scope.Set(reflect.Append(scope, elems...))
+
+ cws = primitive.CodeWithScope{
+ Code: primitive.JavaScript(code),
+ Scope: scope.Interface().(primitive.D),
+ }
+ return cws, nil
+}
+
+func (dvd DefaultValueDecoders) codeWithScopeDecodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+ if t != tCodeWithScope {
+ return emptyValue, ValueDecoderError{
+ Name: "CodeWithScopeDecodeValue",
+ Types: []reflect.Type{tCodeWithScope},
+ Received: reflect.Zero(t),
+ }
+ }
+
+ var cws primitive.CodeWithScope
+ var err error
+ switch vrType := vr.Type(); vrType {
+ case bsontype.CodeWithScope:
+ cws, err = dvd.readCodeWithScope(dc, vr)
+ case bsontype.Null:
+ err = vr.ReadNull()
+ case bsontype.Undefined:
+ err = vr.ReadUndefined()
+ default:
+ return emptyValue, fmt.Errorf("cannot decode %v into a primitive.CodeWithScope", vrType)
+ }
+ if err != nil {
+ return emptyValue, err
+ }
+
+ return reflect.ValueOf(cws), nil
+}
+
+// CodeWithScopeDecodeValue is the ValueDecoderFunc for CodeWithScope.
+func (dvd DefaultValueDecoders) CodeWithScopeDecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+ if !val.CanSet() || val.Type() != tCodeWithScope {
+ return ValueDecoderError{Name: "CodeWithScopeDecodeValue", Types: []reflect.Type{tCodeWithScope}, Received: val}
+ }
+
+ elem, err := dvd.codeWithScopeDecodeType(dc, vr, tCodeWithScope)
+ if err != nil {
+ return err
+ }
+
+ val.Set(elem)
+ return nil
+}
+
+func (dvd DefaultValueDecoders) decodeD(dc DecodeContext, vr bsonrw.ValueReader, _ reflect.Value) ([]reflect.Value, error) {
+ switch vr.Type() {
+ case bsontype.Type(0), bsontype.EmbeddedDocument:
+ default:
+ return nil, fmt.Errorf("cannot decode %v into a D", vr.Type())
+ }
+
+ dr, err := vr.ReadDocument()
+ if err != nil {
+ return nil, err
+ }
+
+ return dvd.decodeElemsFromDocumentReader(dc, dr)
+}
+
+func (DefaultValueDecoders) decodeElemsFromDocumentReader(dc DecodeContext, dr bsonrw.DocumentReader) ([]reflect.Value, error) {
+ decoder, err := dc.LookupDecoder(tEmpty)
+ if err != nil {
+ return nil, err
+ }
+
+ elems := make([]reflect.Value, 0)
+ for {
+ key, vr, err := dr.ReadElement()
+ if err == bsonrw.ErrEOD {
+ break
+ }
+ if err != nil {
+ return nil, err
+ }
+
+ val := reflect.New(tEmpty).Elem()
+ err = decoder.DecodeValue(dc, vr, val)
+ if err != nil {
+ return nil, newDecodeError(key, err)
+ }
+
+ elems = append(elems, reflect.ValueOf(primitive.E{Key: key, Value: val.Interface()}))
+ }
+
+ return elems, nil
+}
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-12 23:28:01 +0000