JSON Path

JSONPath is a similar to XPath alternative for JSON.

The result can be a single value or a list of multiple values.

There are two notations, dot-notation:$.book[1].title and bracket-notation: $['book'][1]['title'] (indexing starts from 0, negative indices are relative to the last element).

Example input: {"book": [ {"year": 1999, "title": "Timeline", "author": "Michael Crichton"}, {"year": 2000, "title": "Plain Truth", "author": "Jodi Picoult"} ]}

Example results: $.book[0] - {"year": 1999, "title": "Timeline", "author": "Michael Crichton"} (JSON or String single value)
$.book[*].year - [1999,2000] (JSON or Int or Real list)
$.book[2].year - ? (no such part)
$..author - Timeline (String) or "Timeline" (JSON)

The default path ($..*) will select all possible subparts (excluding the whole JSON value).

When you request the paths instead of values for the $.book[0].* JSONPath, you will get the paths -in bracket notation- as a list of Strings:

• $['book'][0]['year']
• $['book'][0]['title']
• $['book'][0]['author']

The filters ?(expr)can be used to select contents with specific properties, for example $..book[?(@.publisher)] selects the books that specify their publisher (@ refers to the actual element).

It uses the jayway/JsonPath implementation.