46 lines
1.0 KiB
Go
46 lines
1.0 KiB
Go
// Copyright 2012-2015 Apcera Inc. All rights reserved.
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package builtin
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import (
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"encoding/json"
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"strings"
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)
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// JsonEncoder is a JSON Encoder implementation for EncodedConn.
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// This encoder will use the builtin encoding/json to Marshal
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// and Unmarshal most types, including structs.
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type JsonEncoder struct {
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// Empty
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}
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// Encode
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func (je *JsonEncoder) Encode(subject string, v interface{}) ([]byte, error) {
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b, err := json.Marshal(v)
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if err != nil {
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return nil, err
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}
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return b, nil
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}
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// Decode
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func (je *JsonEncoder) Decode(subject string, data []byte, vPtr interface{}) (err error) {
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switch arg := vPtr.(type) {
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case *string:
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// If they want a string and it is a JSON string, strip quotes
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// This allows someone to send a struct but receive as a plain string
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// This cast should be efficient for Go 1.3 and beyond.
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str := string(data)
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if strings.HasPrefix(str, `"`) && strings.HasSuffix(str, `"`) {
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*arg = str[1 : len(str)-1]
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} else {
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*arg = str
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}
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case *[]byte:
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*arg = data
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default:
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err = json.Unmarshal(data, arg)
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}
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return
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}
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