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ej.go
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ej.go
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package ej
import (
"encoding/json"
"fmt"
)
// A JSONHandler read and write bytes
// from any source.
type JSONHandler interface {
Read() ([]byte, error)
Write([]byte) error
}
// EJ - Easy JSON struct
type EJ struct {
jsonHandler JSONHandler
}
// JSON receives a JSONHandler and returns
// a new JSONHandler instance
func JSON(JSONh JSONHandler) *EJ {
return &EJ{
jsonHandler: JSONh,
}
}
// ParseToData parses the JSON-encoded data and stores the result
// in the value pointed to by "data"
func (e *EJ) ParseToData(data interface{}) error {
value, err := e.jsonHandler.Read()
if err != nil {
return fmt.Errorf("read: %s", err.Error())
}
if err := json.Unmarshal(value, data); err != nil {
return fmt.Errorf("json unmarshal: %s", err.Error())
}
return nil
}
// Write the JSON encoding of "data" in the
// source of JSONHandler
func (e *EJ) Write(data interface{}) error {
value, err := json.Marshal(data)
if err != nil {
return fmt.Errorf("json marshal: %s", err.Error())
}
if err := e.jsonHandler.Write(value); err != nil {
return fmt.Errorf("write: %s", err.Error())
}
return nil
}