xpath/jsonpath support

[dcolazin]

Following this Stackoverflow answer, I started experimenting with Josson. The map syntax is extremely useful, but xpath/jsonpath would be extremely useful.

[raymondchoigit]

Sorry, I don't understand your request. Could you explain more? Is it related to XPath or JsonPath?

[dcolazin]

Thank you for the fast reply. The request is an extension of the Josson.getNode(String) method, which uses the map syntax. I'm mainly interested in JsonPath, but I would say the support with XPath is similar. Using the example in SO: given an object

{
    "a": {"a1": 1, "a2": 2},
    "b": foo,
    "c": []
}

and a list of (json)paths ["$.a.a2", "$.c"] the desired result is

{
    "a": {"a2": 2},
    "c": []
}

Currently, it is possible to obtain it with the map syntax in the following way josson.getNode("map(a.map(a2), c)"), while the equivalent jsonpath syntax would be josson.getNode("$.a.a2", "$.c").

[octomix]

The purpose of a Josson path is to process along the path and query the last element value. For example, a.a2 returns 2 only, and removed the parent structure. I'm thinking of adding a new and special function build() to retain the full path structure.

josson.getNode("build(a.a2, c)") will produce

{
    "a": {"a2": 2},
    "c": []
}

Does it fulfill your requirement?