JsonPath

A golang implementation of JsonPath syntax. follow the majority rules in http://goessner.net/articles/JsonPath/ but also with some minor differences.

this library is till bleeding edge, so use it at your own risk. :D

Golang Version Required: 1.5+

Get Started

go get github.com/oliveagle/jsonpath

example code:

import (
"github.com/oliveagle/jsonpath""encoding/json"
)
varjson_datainterface{}
json.Unmarshal([]byte(data), &json_data)
res, err:=jsonpath.JsonPathLookup(json_data, "$.expensive")

Operators

referenced from github.com/jayway/JsonPath

Operator	Supported	Description
$	Y	The root element to query. This starts all path expressions.
@	Y	The current node being processed by a filter predicate.
*	X	Wildcard. Available anywhere a name or numeric are required.
..	X	Deep scan. Available anywhere a name is required.
.	Y	Dot-notated child
['' (, '')]	X	Bracket-notated child or children
[ (, )]	Y	Array index or indexes
[start:end]	Y	Array slice operator
[?()]	Y	Filter expression. Expression must evaluate to a boolean value.

Examples

given these example data.

{"store": {"book": [{"category": "reference","author": "Nigel Rees","title": "Sayings of the Century","price": 8.95},{"category": "fiction","author": "Evelyn Waugh","title": "Sword of Honour","price": 12.99},{"category": "fiction","author": "Herman Melville","title": "Moby Dick","isbn": "0-553-21311-3","price": 8.99},{"category": "fiction","author": "J. R. R. Tolkien","title": "The Lord of the Rings","isbn": "0-395-19395-8","price": 22.99}],"bicycle": {"color": "red","price": 19.95}},"expensive": 10}

example json path syntax.

jsonpath	result
$.expensive	10
$.store.book[0].price	8.95
$.store.book[-1].isbn	"0-395-19395-8"
$.store.book[0,1].price	[8.95, 12.99]
$.store.book[0:2].price	[8.95, 12.99, 8.99]
$.store.book[?(@.isbn)].price	[8.99, 22.99]
$.store.book[?(@.price > 10)].title	["Sword of Honour", "The Lord of the Rings"]
$.store.book[?(@.price < $.expensive)].price	[8.95, 8.99]
$.store.book[:].price	[8.9.5, 12.99, 8.9.9, 22.99]