115 lines
4.9 KiB
Go
115 lines
4.9 KiB
Go
// Copyright (C) MongoDB, Inc. 2017-present.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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package mgocompat
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import (
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"errors"
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"reflect"
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"time"
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"go.mongodb.org/mongo-driver/bson"
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"go.mongodb.org/mongo-driver/bson/bsoncodec"
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"go.mongodb.org/mongo-driver/bson/bsonoptions"
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"go.mongodb.org/mongo-driver/bson/bsontype"
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)
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var (
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// ErrSetZero may be returned from a SetBSON method to have the value set to its respective zero value.
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ErrSetZero = errors.New("set to zero")
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tInt = reflect.TypeOf(int(0))
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tTime = reflect.TypeOf(time.Time{})
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tM = reflect.TypeOf(bson.M{})
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tInterfaceSlice = reflect.TypeOf([]interface{}{})
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tByteSlice = reflect.TypeOf([]byte{})
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tEmpty = reflect.TypeOf((*interface{})(nil)).Elem()
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tGetter = reflect.TypeOf((*Getter)(nil)).Elem()
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tSetter = reflect.TypeOf((*Setter)(nil)).Elem()
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)
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// Registry is the mgo compatible bsoncodec.Registry. It contains the default and
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// primitive codecs with mgo compatible options.
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var Registry = NewRegistryBuilder().Build()
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// RegistryRespectNilValues is the bsoncodec.Registry compatible with mgo withSetRespectNilValues set to true.
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var RegistryRespectNilValues = NewRespectNilValuesRegistryBuilder().Build()
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// NewRegistryBuilder creates a new bsoncodec.RegistryBuilder configured with the default encoders and
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// decoders from the bsoncodec.DefaultValueEncoders and bsoncodec.DefaultValueDecoders types and the
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// PrimitiveCodecs type in this package.
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func NewRegistryBuilder() *bsoncodec.RegistryBuilder {
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rb := bsoncodec.NewRegistryBuilder()
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bsoncodec.DefaultValueEncoders{}.RegisterDefaultEncoders(rb)
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bsoncodec.DefaultValueDecoders{}.RegisterDefaultDecoders(rb)
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bson.PrimitiveCodecs{}.RegisterPrimitiveCodecs(rb)
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structcodec, _ := bsoncodec.NewStructCodec(bsoncodec.DefaultStructTagParser,
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bsonoptions.StructCodec().
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SetDecodeZeroStruct(true).
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SetEncodeOmitDefaultStruct(true).
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SetOverwriteDuplicatedInlinedFields(false).
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SetAllowUnexportedFields(true))
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emptyInterCodec := bsoncodec.NewEmptyInterfaceCodec(
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bsonoptions.EmptyInterfaceCodec().
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SetDecodeBinaryAsSlice(true))
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mapCodec := bsoncodec.NewMapCodec(
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bsonoptions.MapCodec().
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SetDecodeZerosMap(true).
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SetEncodeNilAsEmpty(true).
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SetEncodeKeysWithStringer(true))
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uintcodec := bsoncodec.NewUIntCodec(bsonoptions.UIntCodec().SetEncodeToMinSize(true))
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rb.RegisterTypeDecoder(tEmpty, emptyInterCodec).
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RegisterDefaultDecoder(reflect.String, bsoncodec.NewStringCodec(bsonoptions.StringCodec().SetDecodeObjectIDAsHex(false))).
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RegisterDefaultDecoder(reflect.Struct, structcodec).
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RegisterDefaultDecoder(reflect.Map, mapCodec).
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RegisterTypeEncoder(tByteSlice, bsoncodec.NewByteSliceCodec(bsonoptions.ByteSliceCodec().SetEncodeNilAsEmpty(true))).
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RegisterDefaultEncoder(reflect.Struct, structcodec).
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RegisterDefaultEncoder(reflect.Slice, bsoncodec.NewSliceCodec(bsonoptions.SliceCodec().SetEncodeNilAsEmpty(true))).
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RegisterDefaultEncoder(reflect.Map, mapCodec).
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RegisterDefaultEncoder(reflect.Uint, uintcodec).
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RegisterDefaultEncoder(reflect.Uint8, uintcodec).
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RegisterDefaultEncoder(reflect.Uint16, uintcodec).
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RegisterDefaultEncoder(reflect.Uint32, uintcodec).
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RegisterDefaultEncoder(reflect.Uint64, uintcodec).
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RegisterTypeMapEntry(bsontype.Int32, tInt).
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RegisterTypeMapEntry(bsontype.DateTime, tTime).
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RegisterTypeMapEntry(bsontype.Array, tInterfaceSlice).
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RegisterTypeMapEntry(bsontype.Type(0), tM).
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RegisterTypeMapEntry(bsontype.EmbeddedDocument, tM).
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RegisterHookEncoder(tGetter, bsoncodec.ValueEncoderFunc(GetterEncodeValue)).
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RegisterHookDecoder(tSetter, bsoncodec.ValueDecoderFunc(SetterDecodeValue))
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return rb
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}
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// NewRespectNilValuesRegistryBuilder creates a new bsoncodec.RegistryBuilder configured to behave like mgo/bson
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// with RespectNilValues set to true.
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func NewRespectNilValuesRegistryBuilder() *bsoncodec.RegistryBuilder {
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rb := NewRegistryBuilder()
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structcodec, _ := bsoncodec.NewStructCodec(bsoncodec.DefaultStructTagParser,
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bsonoptions.StructCodec().
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SetDecodeZeroStruct(true).
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SetEncodeOmitDefaultStruct(true).
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SetOverwriteDuplicatedInlinedFields(false).
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SetAllowUnexportedFields(true))
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mapCodec := bsoncodec.NewMapCodec(
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bsonoptions.MapCodec().
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SetDecodeZerosMap(true).
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SetEncodeNilAsEmpty(false))
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rb.RegisterDefaultDecoder(reflect.Struct, structcodec).
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RegisterDefaultDecoder(reflect.Map, mapCodec).
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RegisterTypeEncoder(tByteSlice, bsoncodec.NewByteSliceCodec(bsonoptions.ByteSliceCodec().SetEncodeNilAsEmpty(false))).
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RegisterDefaultEncoder(reflect.Struct, structcodec).
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RegisterDefaultEncoder(reflect.Slice, bsoncodec.NewSliceCodec(bsonoptions.SliceCodec().SetEncodeNilAsEmpty(false))).
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RegisterDefaultEncoder(reflect.Map, mapCodec)
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return rb
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}
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