gistfile1.go

package main

import (
	"strconv"
	"time"
	"github.com/ugorji/go/codec"
	"encoding/json"
)

func main() {
	val, err := Codecdemo()
	if err != nil {
		panic(err)
	}

	m := new(Wrapper)
	if err = json.Unmarshal(val, m); err != nil {
		println("val:", string(val))
		panic(err)
	}

	println("val:", string(val))

}

type MapVal struct {
	Name string
	Time time.Time
}

type Entry struct {
	Vals map[string]*MapVal
}

type Wrapper struct {
	Entries []*Entry
}

func Codecdemo() ([]byte, error) {
	w := new(Wrapper)
	w.Entries = make([]*Entry, 1)
	e := new(Entry)
	w.Entries[0] = e
	w.Entries[0].Vals = make(map[string]*MapVal, 0)

	for i := 0; i < 4; i++ {
		m := new(MapVal)
		m.Name = strconv.Itoa(i + 1)
		m.Time = time.Now()
		w.Entries[0].Vals[m.Name] = m
	}

	b := make([]byte, 0)
	h := new(codec.JsonHandle)
	enc := codec.NewEncoderBytes(&b, h)
	if err := enc.Encode(w); err != nil {
		return nil, err
	}

	return b, nil
}