NJson
NJSON is a Go package that Unmarshal/Decode nested JSON data depend on provided path
Installation
$ go get -u github.com/m7shapan/njsonExample
package main
import (
"fmt"
"github.com/m7shapan/njson"
)
func main() {
json := `
{
"name": {"first": "Mohamed", "last": "Shapan"},
"age": 26,
"friends": [
{"name": "Asma", "age": 26},
{"name": "Ahmed", "age": 25},
{"name": "Mahmoud", "age": 30}
]
}`
type User struct {
Name string `njson:"name.last"`
Age int `njson:"age"`
Friends []string `njson:"friends.#.name"`
}
u := User{}
err := njson.Unmarshal([]byte(json), &u)
if err != nil {
// do anything
}
fmt.Printf("%+v\n", u) // {Name:Shapan Age:26 Friends:[Asma Ahmed Mahmoud]}
}Path Syntax
A path is a series of keys separated by a dot. A key may contain special wildcard characters '*' and '?'. To access an array value use the index as the key. To get the number of elements in an array or to access a child path, use the '#' character. The dot and wildcard characters can be escaped with ''.
{
"name": {"first": "Tom", "last": "Anderson"},
"age":37,
"children": ["Sara","Alex","Jack"],
"fav.movie": "Deer Hunter",
"friends": [
{"first": "Dale", "last": "Murphy", "age": 44, "nets": ["ig", "fb", "tw"]},
{"first": "Roger", "last": "Craig", "age": 68, "nets": ["fb", "tw"]},
{"first": "Jane", "last": "Murphy", "age": 47, "nets": ["ig", "tw"]}
]
}"name.last" >> "Anderson"
"age" >> 37
"children" >> ["Sara","Alex","Jack"]
"children.#" >> 3
"children.1" >> "Alex"
"child*.2" >> "Jack"
"c?ildren.0" >> "Sara"
"fav\.movie" >> "Deer Hunter"
"friends.#.first" >> ["Dale","Roger","Jane"]
"friends.1.last" >> "Craig"
TODOs
- Add test cases
- Improve
maptype Unmarshal/Decode performance - Improve
structtype Unmarshal/Decode performance
Contact
Mohamed Shapan @m7shapan
Oh, Thanks!
By the way i want to thank Josh Baker for his package gjson