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coder.go
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coder.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 mongodbio
import (
"fmt"
"reflect"
"github.com/apache/beam/sdks/v2/go/pkg/beam"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/primitive"
)
func init() {
beam.RegisterCoder(
reflect.TypeOf((*bson.M)(nil)).Elem(),
encodeBSONMap,
decodeBSONMap,
)
beam.RegisterCoder(
reflect.TypeOf((*primitive.ObjectID)(nil)).Elem(),
encodeObjectID,
decodeObjectID,
)
}
func encodeBSONMap(m bson.M) ([]byte, error) {
bytes, err := bson.Marshal(m)
if err != nil {
return nil, fmt.Errorf("error encoding BSON: %w", err)
}
return bytes, nil
}
func decodeBSONMap(bytes []byte) (bson.M, error) {
var out bson.M
if err := bson.Unmarshal(bytes, &out); err != nil {
return nil, fmt.Errorf("error decoding BSON: %w", err)
}
return out, nil
}
func encodeObjectID(objectID primitive.ObjectID) []byte {
return objectID[:]
}
func decodeObjectID(bytes []byte) primitive.ObjectID {
var out primitive.ObjectID
copy(out[:], bytes[:])
return out
}