github.com/tickoalcantara12/micro/v3@v3.0.0-20221007104245-9d75b9bcbab9/util/codec/json/marshaler.go (about)

     1  // Licensed under the Apache License, Version 2.0 (the "License");
     2  // you may not use this file except in compliance with the License.
     3  // You may obtain a copy of the License at
     4  //
     5  //     https://www.apache.org/licenses/LICENSE-2.0
     6  //
     7  // Unless required by applicable law or agreed to in writing, software
     8  // distributed under the License is distributed on an "AS IS" BASIS,
     9  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    10  // See the License for the specific language governing permissions and
    11  // limitations under the License.
    12  //
    13  // Original source: github.com/micro/go-micro/v3/codec/json/marshaler.go
    14  
    15  package json
    16  
    17  import (
    18  	"bytes"
    19  	"encoding/json"
    20  
    21  	"github.com/golang/protobuf/jsonpb"
    22  	"github.com/golang/protobuf/proto"
    23  	"github.com/oxtoacart/bpool"
    24  )
    25  
    26  var jsonpbMarshaler = &jsonpb.Marshaler{}
    27  
    28  // create buffer pool with 16 instances each preallocated with 256 bytes
    29  var bufferPool = bpool.NewSizedBufferPool(16, 256)
    30  
    31  type Marshaler struct{}
    32  
    33  func (j Marshaler) Marshal(v interface{}) ([]byte, error) {
    34  	if pb, ok := v.(proto.Message); ok {
    35  		buf := bufferPool.Get()
    36  		defer bufferPool.Put(buf)
    37  		if err := jsonpbMarshaler.Marshal(buf, pb); err != nil {
    38  			return nil, err
    39  		}
    40  		return buf.Bytes(), nil
    41  	}
    42  	return json.Marshal(v)
    43  }
    44  
    45  func (j Marshaler) Unmarshal(d []byte, v interface{}) error {
    46  	if pb, ok := v.(proto.Message); ok {
    47  		return jsonpb.Unmarshal(bytes.NewReader(d), pb)
    48  	}
    49  	return json.Unmarshal(d, v)
    50  }
    51  
    52  func (j Marshaler) String() string {
    53  	return "json"
    54  }