Allow custom JSON pointer class

[tzoiker]

@stefankoegl It would be nice to be able to pass a custom implementation of the JSON pointer.

[coveralls]

Coverage increased (+0.1%) to 65.953% when pulling eca4f8a on tzoiker:feature/custom-pointer into 24b5e86 on stefankoegl:master.

[coveralls]

Coverage decreased (-0.05%) to 64.989% when pulling 124eb76 on tzoiker:feature/custom-pointer into 4fe5c2c on stefankoegl:master.

[tzoiker]

@stefankoegl is it possible to accept soon? I want to use it in another project and avoid even temporary copy-pasting.

[Alanscut]

LGTM, would you mind adding more tests for custom Pointer which is not extended from python-json-pointer?
Just for curiosity, can't python-json-pointer meet your current requirment?

[tzoiker]

LGTM, would you mind adding more tests for custom Pointer which is not extended from python-json-pointer?
Just for curiosity, can't python-json-pointer meet your current requirment?

Added a toy example. The idea was to at least be able to extend (or replace with the same, but custom implementation in C or whatever). In my particular case, I wanted to add an extension (out of spec, obviously) that allows to dynamically match array indexes based on the nested values of array elements (something like /@foo="bar"/val instead of /1/val for [{"foo": "baz", "val": 0}, {"foo": "bar", "val": 1}}]).

[Alanscut]

Nice work! it will make this lib more flexiable.

[stefankoegl]

@tzoiker, looks good. Please revert the change of version number - that will be done when a new release is prepared.

Could you please also briefly describe your use case?

[tzoiker]

@tzoiker, looks good. Please revert the change of version number - that will be done when a new release is prepared.

Could you please also briefly describe your use case?

Described it in this comment #114 (comment)

Hmm, for some reason coverage decreased after I reverted the package version.

[stefankoegl]

Looks good now. I just merged another pull request, so there's a conflict now. If you can resolve that, I can merge right afterwards.

[stefankoegl]

I have just released v1.27 which inlcudes this PR. Thanks for the contribution!