What kind of expression is allowed in script expressions? about jsonpath HOT 5 OPEN

There is no underlying script engine. The filter is parsed and evaluated in java. The implementation is very limited.

from jsonpath.

Hi there,

Thx for your reply and sorry for my late reply in turn.

"The filter is parsed and evaluated in java"

The filter is parsed, meaning parsed as which language? What is the kind of expression that you expect here?

"this implementation very limited"

Ok I get that, however what is it more precisely: how would I know what kind of expression is allowed and what is not?
There may be a lack of documentation there.

Thanks again,
Franck.

from jsonpath.

In version 2.0 basic comparison operators are supported

==
!= 
>
>=
<
<=
=~ (regexp)

&& 
||

you can not use parenthesis to control evaluation like ((@.a == 1 && @.b == 2) || @.c == true)

from jsonpath.

Hi,

Thx Kallestenflo, good to have a clear idea of the capabilities.

It would probably be a good idea to document this in the README of the project.

Cheers,
Franck.

from jsonpath.

Another one: the operators you mention work for the filters [?(...)] where the expression evaluates to a boolean.

What about calculated index [(...)] : can you do any calculation with field names, @.length, etc. ?

Franck.

from jsonpath.