add some usage info to the README
1 file changed
tree: 53ecc6774fb1e2361286b5282ce015e56b6307aa
  1. LICENSE-APACHE-2.0.txt
  2. README.md
  3. pointer.go
  4. pointer_test.go
README.md

gojsonpointer

An implementation of JSON Pointer - Go language

Usage

jsonText := `{
	"name": "Bobby B",
	"occupation": {
		"title" : "King",
		"years" : 15,
		"heir" : "Joffrey B"			
	}
}`

var jsonDocument map[string]interface{}
json.Unmarshal([]byte(jsonText), &jsonDocument)

//create a JSON pointer
pointerString := "/occupation/title"
pointer, _ := NewJsonPointer(pointerString)

//SET a new value for the "title" in the document     
pointer.Set(jsonDocument, "Supreme Leader of Westeros")

//GET the new "title" from the document
title, _, _ := pointer.Get(jsonDocument)
fmt.Println(title) //outputs "Supreme Leader of Westeros"

//DELETE the "heir" from the document (only works on maps for now, not arrays)
deletePointer := NewJsonPointer("/occupation/heir")
deletePointer.Delete(jsonDocument)

b, _ := json.Marshal(jsonDocument)
fmt.Println(string(b))
//outputs `{"name":"Bobby B","occupation":{"title":"Supreme Leader of Westeros","years":15}}`

References

http://tools.ietf.org/html/draft-ietf-appsawg-json-pointer-07

Note

The 4.Evaluation part of the previous reference, starting with ‘If the currently referenced value is a JSON array, the reference token MUST contain either...’ is not implemented.