logmower-shipper/vendor/go.mongodb.org/mongo-driver/x/bsonx/primitive_codecs.go

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// 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 bsonx
import (
"errors"
"fmt"
"reflect"
"go.mongodb.org/mongo-driver/bson/bsoncodec"
"go.mongodb.org/mongo-driver/bson/bsonrw"
"go.mongodb.org/mongo-driver/bson/bsontype"
)
var primitiveCodecs PrimitiveCodecs
var tDocument = reflect.TypeOf((Doc)(nil))
var tArray = reflect.TypeOf((Arr)(nil))
var tValue = reflect.TypeOf(Val{})
var tElementSlice = reflect.TypeOf(([]Elem)(nil))
// PrimitiveCodecs is a namespace for all of the default bsoncodec.Codecs for the primitive types
// defined in this package.
type PrimitiveCodecs struct{}
// RegisterPrimitiveCodecs will register the encode and decode methods attached to PrimitiveCodecs
// with the provided RegistryBuilder. if rb is nil, a new empty RegistryBuilder will be created.
func (pc PrimitiveCodecs) RegisterPrimitiveCodecs(rb *bsoncodec.RegistryBuilder) {
if rb == nil {
panic(errors.New("argument to RegisterPrimitiveCodecs must not be nil"))
}
rb.
RegisterTypeEncoder(tDocument, bsoncodec.ValueEncoderFunc(pc.DocumentEncodeValue)).
RegisterTypeEncoder(tArray, bsoncodec.ValueEncoderFunc(pc.ArrayEncodeValue)).
RegisterTypeEncoder(tValue, bsoncodec.ValueEncoderFunc(pc.ValueEncodeValue)).
RegisterTypeEncoder(tElementSlice, bsoncodec.ValueEncoderFunc(pc.ElementSliceEncodeValue)).
RegisterTypeDecoder(tDocument, bsoncodec.ValueDecoderFunc(pc.DocumentDecodeValue)).
RegisterTypeDecoder(tArray, bsoncodec.ValueDecoderFunc(pc.ArrayDecodeValue)).
RegisterTypeDecoder(tValue, bsoncodec.ValueDecoderFunc(pc.ValueDecodeValue)).
RegisterTypeDecoder(tElementSlice, bsoncodec.ValueDecoderFunc(pc.ElementSliceDecodeValue))
}
// DocumentEncodeValue is the ValueEncoderFunc for *Document.
func (pc PrimitiveCodecs) DocumentEncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
if !val.IsValid() || val.Type() != tDocument {
return bsoncodec.ValueEncoderError{Name: "DocumentEncodeValue", Types: []reflect.Type{tDocument}, Received: val}
}
if val.IsNil() {
return vw.WriteNull()
}
doc := val.Interface().(Doc)
dw, err := vw.WriteDocument()
if err != nil {
return err
}
return pc.encodeDocument(ec, dw, doc)
}
// DocumentDecodeValue is the ValueDecoderFunc for *Document.
func (pc PrimitiveCodecs) DocumentDecodeValue(dctx bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
if !val.CanSet() || val.Type() != tDocument {
return bsoncodec.ValueDecoderError{Name: "DocumentDecodeValue", Types: []reflect.Type{tDocument}, Received: val}
}
return pc.documentDecodeValue(dctx, vr, val.Addr().Interface().(*Doc))
}
func (pc PrimitiveCodecs) documentDecodeValue(dctx bsoncodec.DecodeContext, vr bsonrw.ValueReader, doc *Doc) error {
dr, err := vr.ReadDocument()
if err != nil {
return err
}
return pc.decodeDocument(dctx, dr, doc)
}
// ArrayEncodeValue is the ValueEncoderFunc for *Array.
func (pc PrimitiveCodecs) ArrayEncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
if !val.IsValid() || val.Type() != tArray {
return bsoncodec.ValueEncoderError{Name: "ArrayEncodeValue", Types: []reflect.Type{tArray}, Received: val}
}
if val.IsNil() {
return vw.WriteNull()
}
arr := val.Interface().(Arr)
aw, err := vw.WriteArray()
if err != nil {
return err
}
for _, val := range arr {
dvw, err := aw.WriteArrayElement()
if err != nil {
return err
}
err = pc.encodeValue(ec, dvw, val)
if err != nil {
return err
}
}
return aw.WriteArrayEnd()
}
// ArrayDecodeValue is the ValueDecoderFunc for *Array.
func (pc PrimitiveCodecs) ArrayDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
if !val.CanSet() || val.Type() != tArray {
return bsoncodec.ValueDecoderError{Name: "ArrayDecodeValue", Types: []reflect.Type{tArray}, Received: val}
}
ar, err := vr.ReadArray()
if err != nil {
return err
}
if val.IsNil() {
val.Set(reflect.MakeSlice(tArray, 0, 0))
}
val.SetLen(0)
for {
vr, err := ar.ReadValue()
if err == bsonrw.ErrEOA {
break
}
if err != nil {
return err
}
var elem Val
err = pc.valueDecodeValue(dc, vr, &elem)
if err != nil {
return err
}
val.Set(reflect.Append(val, reflect.ValueOf(elem)))
}
return nil
}
// ElementSliceEncodeValue is the ValueEncoderFunc for []*Element.
func (pc PrimitiveCodecs) ElementSliceEncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
if !val.IsValid() || val.Type() != tElementSlice {
return bsoncodec.ValueEncoderError{Name: "ElementSliceEncodeValue", Types: []reflect.Type{tElementSlice}, Received: val}
}
if val.IsNil() {
return vw.WriteNull()
}
return pc.DocumentEncodeValue(ec, vw, val.Convert(tDocument))
}
// ElementSliceDecodeValue is the ValueDecoderFunc for []*Element.
func (pc PrimitiveCodecs) ElementSliceDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
if !val.CanSet() || val.Type() != tElementSlice {
return bsoncodec.ValueDecoderError{Name: "ElementSliceDecodeValue", Types: []reflect.Type{tElementSlice}, Received: val}
}
if val.IsNil() {
val.Set(reflect.MakeSlice(val.Type(), 0, 0))
}
val.SetLen(0)
dr, err := vr.ReadDocument()
if err != nil {
return err
}
elems := make([]reflect.Value, 0)
for {
key, vr, err := dr.ReadElement()
if err == bsonrw.ErrEOD {
break
}
if err != nil {
return err
}
var elem Elem
err = pc.elementDecodeValue(dc, vr, key, &elem)
if err != nil {
return err
}
elems = append(elems, reflect.ValueOf(elem))
}
val.Set(reflect.Append(val, elems...))
return nil
}
// ValueEncodeValue is the ValueEncoderFunc for *Value.
func (pc PrimitiveCodecs) ValueEncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
if !val.IsValid() || val.Type() != tValue {
return bsoncodec.ValueEncoderError{Name: "ValueEncodeValue", Types: []reflect.Type{tValue}, Received: val}
}
v := val.Interface().(Val)
return pc.encodeValue(ec, vw, v)
}
// ValueDecodeValue is the ValueDecoderFunc for *Value.
func (pc PrimitiveCodecs) ValueDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
if !val.CanSet() || val.Type() != tValue {
return bsoncodec.ValueDecoderError{Name: "ValueDecodeValue", Types: []reflect.Type{tValue}, Received: val}
}
return pc.valueDecodeValue(dc, vr, val.Addr().Interface().(*Val))
}
// encodeDocument is a separate function that we use because CodeWithScope
// returns us a DocumentWriter and we need to do the same logic that we would do
// for a document but cannot use a Codec.
func (pc PrimitiveCodecs) encodeDocument(ec bsoncodec.EncodeContext, dw bsonrw.DocumentWriter, doc Doc) error {
for _, elem := range doc {
dvw, err := dw.WriteDocumentElement(elem.Key)
if err != nil {
return err
}
err = pc.encodeValue(ec, dvw, elem.Value)
if err != nil {
return err
}
}
return dw.WriteDocumentEnd()
}
// DecodeDocument haves decoding into a Doc from a bsonrw.DocumentReader.
func (pc PrimitiveCodecs) DecodeDocument(dctx bsoncodec.DecodeContext, dr bsonrw.DocumentReader, pdoc *Doc) error {
return pc.decodeDocument(dctx, dr, pdoc)
}
func (pc PrimitiveCodecs) decodeDocument(dctx bsoncodec.DecodeContext, dr bsonrw.DocumentReader, pdoc *Doc) error {
if *pdoc == nil {
*pdoc = make(Doc, 0)
}
*pdoc = (*pdoc)[:0]
for {
key, vr, err := dr.ReadElement()
if err == bsonrw.ErrEOD {
break
}
if err != nil {
return err
}
var elem Elem
err = pc.elementDecodeValue(dctx, vr, key, &elem)
if err != nil {
return err
}
*pdoc = append(*pdoc, elem)
}
return nil
}
func (pc PrimitiveCodecs) elementDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, key string, elem *Elem) error {
var val Val
switch vr.Type() {
case bsontype.Double:
f64, err := vr.ReadDouble()
if err != nil {
return err
}
val = Double(f64)
case bsontype.String:
str, err := vr.ReadString()
if err != nil {
return err
}
val = String(str)
case bsontype.EmbeddedDocument:
var embeddedDoc Doc
err := pc.documentDecodeValue(dc, vr, &embeddedDoc)
if err != nil {
return err
}
val = Document(embeddedDoc)
case bsontype.Array:
arr := reflect.New(tArray).Elem()
err := pc.ArrayDecodeValue(dc, vr, arr)
if err != nil {
return err
}
val = Array(arr.Interface().(Arr))
case bsontype.Binary:
data, subtype, err := vr.ReadBinary()
if err != nil {
return err
}
val = Binary(subtype, data)
case bsontype.Undefined:
err := vr.ReadUndefined()
if err != nil {
return err
}
val = Undefined()
case bsontype.ObjectID:
oid, err := vr.ReadObjectID()
if err != nil {
return err
}
val = ObjectID(oid)
case bsontype.Boolean:
b, err := vr.ReadBoolean()
if err != nil {
return err
}
val = Boolean(b)
case bsontype.DateTime:
dt, err := vr.ReadDateTime()
if err != nil {
return err
}
val = DateTime(dt)
case bsontype.Null:
err := vr.ReadNull()
if err != nil {
return err
}
val = Null()
case bsontype.Regex:
pattern, options, err := vr.ReadRegex()
if err != nil {
return err
}
val = Regex(pattern, options)
case bsontype.DBPointer:
ns, pointer, err := vr.ReadDBPointer()
if err != nil {
return err
}
val = DBPointer(ns, pointer)
case bsontype.JavaScript:
js, err := vr.ReadJavascript()
if err != nil {
return err
}
val = JavaScript(js)
case bsontype.Symbol:
symbol, err := vr.ReadSymbol()
if err != nil {
return err
}
val = Symbol(symbol)
case bsontype.CodeWithScope:
code, scope, err := vr.ReadCodeWithScope()
if err != nil {
return err
}
var doc Doc
err = pc.decodeDocument(dc, scope, &doc)
if err != nil {
return err
}
val = CodeWithScope(code, doc)
case bsontype.Int32:
i32, err := vr.ReadInt32()
if err != nil {
return err
}
val = Int32(i32)
case bsontype.Timestamp:
t, i, err := vr.ReadTimestamp()
if err != nil {
return err
}
val = Timestamp(t, i)
case bsontype.Int64:
i64, err := vr.ReadInt64()
if err != nil {
return err
}
val = Int64(i64)
case bsontype.Decimal128:
d128, err := vr.ReadDecimal128()
if err != nil {
return err
}
val = Decimal128(d128)
case bsontype.MinKey:
err := vr.ReadMinKey()
if err != nil {
return err
}
val = MinKey()
case bsontype.MaxKey:
err := vr.ReadMaxKey()
if err != nil {
return err
}
val = MaxKey()
default:
return fmt.Errorf("Cannot read unknown BSON type %s", vr.Type())
}
*elem = Elem{Key: key, Value: val}
return nil
}
// encodeValue does not validation, and the callers must perform validation on val before calling
// this method.
func (pc PrimitiveCodecs) encodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val Val) error {
var err error
switch val.Type() {
case bsontype.Double:
err = vw.WriteDouble(val.Double())
case bsontype.String:
err = vw.WriteString(val.StringValue())
case bsontype.EmbeddedDocument:
var encoder bsoncodec.ValueEncoder
encoder, err = ec.LookupEncoder(tDocument)
if err != nil {
break
}
err = encoder.EncodeValue(ec, vw, reflect.ValueOf(val.Document()))
case bsontype.Array:
var encoder bsoncodec.ValueEncoder
encoder, err = ec.LookupEncoder(tArray)
if err != nil {
break
}
err = encoder.EncodeValue(ec, vw, reflect.ValueOf(val.Array()))
case bsontype.Binary:
// TODO: FIX THIS (╯°□°)╯︵ ┻━┻
subtype, data := val.Binary()
err = vw.WriteBinaryWithSubtype(data, subtype)
case bsontype.Undefined:
err = vw.WriteUndefined()
case bsontype.ObjectID:
err = vw.WriteObjectID(val.ObjectID())
case bsontype.Boolean:
err = vw.WriteBoolean(val.Boolean())
case bsontype.DateTime:
err = vw.WriteDateTime(val.DateTime())
case bsontype.Null:
err = vw.WriteNull()
case bsontype.Regex:
err = vw.WriteRegex(val.Regex())
case bsontype.DBPointer:
err = vw.WriteDBPointer(val.DBPointer())
case bsontype.JavaScript:
err = vw.WriteJavascript(val.JavaScript())
case bsontype.Symbol:
err = vw.WriteSymbol(val.Symbol())
case bsontype.CodeWithScope:
code, scope := val.CodeWithScope()
var cwsw bsonrw.DocumentWriter
cwsw, err = vw.WriteCodeWithScope(code)
if err != nil {
break
}
err = pc.encodeDocument(ec, cwsw, scope)
case bsontype.Int32:
err = vw.WriteInt32(val.Int32())
case bsontype.Timestamp:
err = vw.WriteTimestamp(val.Timestamp())
case bsontype.Int64:
err = vw.WriteInt64(val.Int64())
case bsontype.Decimal128:
err = vw.WriteDecimal128(val.Decimal128())
case bsontype.MinKey:
err = vw.WriteMinKey()
case bsontype.MaxKey:
err = vw.WriteMaxKey()
default:
err = fmt.Errorf("%T is not a valid BSON type to encode", val.Type())
}
return err
}
func (pc PrimitiveCodecs) valueDecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val *Val) error {
switch vr.Type() {
case bsontype.Double:
f64, err := vr.ReadDouble()
if err != nil {
return err
}
*val = Double(f64)
case bsontype.String:
str, err := vr.ReadString()
if err != nil {
return err
}
*val = String(str)
case bsontype.EmbeddedDocument:
var embeddedDoc Doc
err := pc.documentDecodeValue(dc, vr, &embeddedDoc)
if err != nil {
return err
}
*val = Document(embeddedDoc)
case bsontype.Array:
arr := reflect.New(tArray).Elem()
err := pc.ArrayDecodeValue(dc, vr, arr)
if err != nil {
return err
}
*val = Array(arr.Interface().(Arr))
case bsontype.Binary:
data, subtype, err := vr.ReadBinary()
if err != nil {
return err
}
*val = Binary(subtype, data)
case bsontype.Undefined:
err := vr.ReadUndefined()
if err != nil {
return err
}
*val = Undefined()
case bsontype.ObjectID:
oid, err := vr.ReadObjectID()
if err != nil {
return err
}
*val = ObjectID(oid)
case bsontype.Boolean:
b, err := vr.ReadBoolean()
if err != nil {
return err
}
*val = Boolean(b)
case bsontype.DateTime:
dt, err := vr.ReadDateTime()
if err != nil {
return err
}
*val = DateTime(dt)
case bsontype.Null:
err := vr.ReadNull()
if err != nil {
return err
}
*val = Null()
case bsontype.Regex:
pattern, options, err := vr.ReadRegex()
if err != nil {
return err
}
*val = Regex(pattern, options)
case bsontype.DBPointer:
ns, pointer, err := vr.ReadDBPointer()
if err != nil {
return err
}
*val = DBPointer(ns, pointer)
case bsontype.JavaScript:
js, err := vr.ReadJavascript()
if err != nil {
return err
}
*val = JavaScript(js)
case bsontype.Symbol:
symbol, err := vr.ReadSymbol()
if err != nil {
return err
}
*val = Symbol(symbol)
case bsontype.CodeWithScope:
code, scope, err := vr.ReadCodeWithScope()
if err != nil {
return err
}
var scopeDoc Doc
err = pc.decodeDocument(dc, scope, &scopeDoc)
if err != nil {
return err
}
*val = CodeWithScope(code, scopeDoc)
case bsontype.Int32:
i32, err := vr.ReadInt32()
if err != nil {
return err
}
*val = Int32(i32)
case bsontype.Timestamp:
t, i, err := vr.ReadTimestamp()
if err != nil {
return err
}
*val = Timestamp(t, i)
case bsontype.Int64:
i64, err := vr.ReadInt64()
if err != nil {
return err
}
*val = Int64(i64)
case bsontype.Decimal128:
d128, err := vr.ReadDecimal128()
if err != nil {
return err
}
*val = Decimal128(d128)
case bsontype.MinKey:
err := vr.ReadMinKey()
if err != nil {
return err
}
*val = MinKey()
case bsontype.MaxKey:
err := vr.ReadMaxKey()
if err != nil {
return err
}
*val = MaxKey()
default:
return fmt.Errorf("Cannot read unknown BSON type %s", vr.Type())
}
return nil
}