go.temporal.io/server@v1.23.0/common/codec/gob/gob.go (about)

     1  // The MIT License
     2  //
     3  // Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
     4  //
     5  // Copyright (c) 2020 Uber Technologies, Inc.
     6  //
     7  // Permission is hereby granted, free of charge, to any person obtaining a copy
     8  // of this software and associated documentation files (the "Software"), to deal
     9  // in the Software without restriction, including without limitation the rights
    10  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    11  // copies of the Software, and to permit persons to whom the Software is
    12  // furnished to do so, subject to the following conditions:
    13  //
    14  // The above copyright notice and this permission notice shall be included in
    15  // all copies or substantial portions of the Software.
    16  //
    17  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    18  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    19  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    20  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    21  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    22  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    23  // THE SOFTWARE.
    24  
    25  package gob
    26  
    27  import (
    28  	"bytes"
    29  	"encoding/gob"
    30  	"errors"
    31  	"fmt"
    32  	"reflect"
    33  )
    34  
    35  var errEmptyArgument = errors.New("length of input argument is 0")
    36  
    37  // Encoder is wrapper of gob encoder/decoder
    38  type Encoder struct{}
    39  
    40  // NewGobEncoder create new Encoder
    41  func NewGobEncoder() *Encoder {
    42  	return &Encoder{}
    43  }
    44  
    45  // Encode one or more objects to binary
    46  func (gobEncoder *Encoder) Encode(value ...interface{}) ([]byte, error) {
    47  	if len(value) == 0 {
    48  		return nil, errEmptyArgument
    49  	}
    50  
    51  	var buf bytes.Buffer
    52  	enc := gob.NewEncoder(&buf)
    53  	for i, obj := range value {
    54  		if err := enc.Encode(obj); err != nil {
    55  			return nil, fmt.Errorf(
    56  				"unable to encode argument: %d, %v, with gob error: %v", i, reflect.TypeOf(obj), err)
    57  		}
    58  	}
    59  	return buf.Bytes(), nil
    60  }
    61  
    62  // Decode binary to one or more objects
    63  func (gobEncoder *Encoder) Decode(input []byte, valuePtr ...interface{}) error {
    64  	if len(valuePtr) == 0 {
    65  		return errEmptyArgument
    66  	}
    67  
    68  	dec := gob.NewDecoder(bytes.NewBuffer(input))
    69  	for i, obj := range valuePtr {
    70  		if err := dec.Decode(obj); err != nil {
    71  			return fmt.Errorf(
    72  				"unable to decode argument: %d, %v, with gob error: %v", i, reflect.TypeOf(obj), err)
    73  		}
    74  	}
    75  	return nil
    76  }