You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
3.8 KiB
101 lines
3.8 KiB
// 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 bson
|
|
|
|
import (
|
|
"bytes"
|
|
|
|
"go.mongodb.org/mongo-driver/bson/bsoncodec"
|
|
"go.mongodb.org/mongo-driver/bson/bsonrw"
|
|
"go.mongodb.org/mongo-driver/bson/bsontype"
|
|
)
|
|
|
|
// Unmarshaler is an interface implemented by types that can unmarshal a BSON
|
|
// document representation of themselves. The BSON bytes can be assumed to be
|
|
// valid. UnmarshalBSON must copy the BSON bytes if it wishes to retain the data
|
|
// after returning.
|
|
type Unmarshaler interface {
|
|
UnmarshalBSON([]byte) error
|
|
}
|
|
|
|
// ValueUnmarshaler is an interface implemented by types that can unmarshal a
|
|
// BSON value representaiton of themselves. The BSON bytes and type can be
|
|
// assumed to be valid. UnmarshalBSONValue must copy the BSON value bytes if it
|
|
// wishes to retain the data after returning.
|
|
type ValueUnmarshaler interface {
|
|
UnmarshalBSONValue(bsontype.Type, []byte) error
|
|
}
|
|
|
|
// Unmarshal parses the BSON-encoded data and stores the result in the value
|
|
// pointed to by val. If val is nil or not a pointer, Unmarshal returns
|
|
// InvalidUnmarshalError.
|
|
func Unmarshal(data []byte, val interface{}) error {
|
|
return UnmarshalWithRegistry(DefaultRegistry, data, val)
|
|
}
|
|
|
|
// UnmarshalWithRegistry parses the BSON-encoded data using Registry r and
|
|
// stores the result in the value pointed to by val. If val is nil or not
|
|
// a pointer, UnmarshalWithRegistry returns InvalidUnmarshalError.
|
|
func UnmarshalWithRegistry(r *bsoncodec.Registry, data []byte, val interface{}) error {
|
|
vr := bsonrw.NewBSONDocumentReader(data)
|
|
return unmarshalFromReader(bsoncodec.DecodeContext{Registry: r}, vr, val)
|
|
}
|
|
|
|
// UnmarshalWithContext parses the BSON-encoded data using DecodeContext dc and
|
|
// stores the result in the value pointed to by val. If val is nil or not
|
|
// a pointer, UnmarshalWithRegistry returns InvalidUnmarshalError.
|
|
func UnmarshalWithContext(dc bsoncodec.DecodeContext, data []byte, val interface{}) error {
|
|
vr := bsonrw.NewBSONDocumentReader(data)
|
|
return unmarshalFromReader(dc, vr, val)
|
|
}
|
|
|
|
// UnmarshalExtJSON parses the extended JSON-encoded data and stores the result
|
|
// in the value pointed to by val. If val is nil or not a pointer, Unmarshal
|
|
// returns InvalidUnmarshalError.
|
|
func UnmarshalExtJSON(data []byte, canonical bool, val interface{}) error {
|
|
return UnmarshalExtJSONWithRegistry(DefaultRegistry, data, canonical, val)
|
|
}
|
|
|
|
// UnmarshalExtJSONWithRegistry parses the extended JSON-encoded data using
|
|
// Registry r and stores the result in the value pointed to by val. If val is
|
|
// nil or not a pointer, UnmarshalWithRegistry returns InvalidUnmarshalError.
|
|
func UnmarshalExtJSONWithRegistry(r *bsoncodec.Registry, data []byte, canonical bool, val interface{}) error {
|
|
ejvr, err := bsonrw.NewExtJSONValueReader(bytes.NewReader(data), canonical)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return unmarshalFromReader(bsoncodec.DecodeContext{Registry: r}, ejvr, val)
|
|
}
|
|
|
|
// UnmarshalExtJSONWithContext parses the extended JSON-encoded data using
|
|
// DecodeContext dc and stores the result in the value pointed to by val. If val is
|
|
// nil or not a pointer, UnmarshalWithRegistry returns InvalidUnmarshalError.
|
|
func UnmarshalExtJSONWithContext(dc bsoncodec.DecodeContext, data []byte, canonical bool, val interface{}) error {
|
|
ejvr, err := bsonrw.NewExtJSONValueReader(bytes.NewReader(data), canonical)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return unmarshalFromReader(dc, ejvr, val)
|
|
}
|
|
|
|
func unmarshalFromReader(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val interface{}) error {
|
|
dec := decPool.Get().(*Decoder)
|
|
defer decPool.Put(dec)
|
|
|
|
err := dec.Reset(vr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = dec.SetContext(dc)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return dec.Decode(val)
|
|
}
|
|
|