/
bson.go
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/
bson.go
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// Copyright 2021 FerretDB Inc.
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package bson provides converters from/to BSON for built-in and `types` types.
//
// See contributing guidelines and documentation for package `types` for details.
//
// # Mapping
//
// Composite types
//
// Alias types package bson package
//
// object *types.Document *bson.Document
// array *types.Array *bson.arrayType
//
// Scalar types
//
// Alias types package bson package
//
// double float64 *bson.doubleType
// string string *bson.stringType
// binData types.Binary *bson.binaryType
// objectId types.ObjectID *bson.objectIDType
// bool bool *bson.boolType
// date time.Time *bson.dateTimeType
// null types.NullType *bson.nullType
// regex types.Regex *bson.regexType
// int int32 *bson.int32Type
// timestamp types.Timestamp *bson.timestampType
// long int64 *bson.int64Type
//
//nolint:dupword // false positive
package bson
import (
"bufio"
"encoding"
"fmt"
"time"
"github.com/AlekSi/pointer"
"github.com/FerretDB/FerretDB/internal/types"
"github.com/FerretDB/FerretDB/internal/util/must"
)
//sumtype:decl
type bsontype interface {
bsontype() // seal for sumtype
ReadFrom(*bufio.Reader) error
WriteTo(*bufio.Writer) error
encoding.BinaryMarshaler
}
// TODO https://github.com/FerretDB/FerretDB/issues/260
//
//nolint:deadcode,unused // remove later if it is not needed
func toBSON(v any) bsontype {
switch v := v.(type) {
case *types.Document:
return must.NotFail(ConvertDocument(v))
case *types.Array:
return pointer.To(arrayType(*v))
case float64:
return pointer.To(doubleType(v))
case string:
return pointer.To(stringType(v))
case types.Binary:
return pointer.To(binaryType(v))
case types.ObjectID:
return pointer.To(objectIDType(v))
case bool:
return pointer.To(boolType(v))
case time.Time:
return pointer.To(dateTimeType(v))
case types.NullType:
return pointer.To(nullType(v))
case types.Regex:
return pointer.To(regexType(v))
case int32:
return pointer.To(int32Type(v))
case types.Timestamp:
return pointer.To(timestampType(v))
case int64:
return pointer.To(int64Type(v))
}
panic(fmt.Sprintf("not reached: %T", v)) // for sumtype to work
}