Multiple callbacks on one streaming parser?

[cben]

It seems from README / tests / code that currently one JsonStreamer expects to have exactly one .get / .get_with_conditions callback.
If one wants to extract several parts, the expected way is instantiate multiple JsonStreamer and feed same data to them all?

For our current use case, this is perfectly OK, just wanted to confirm, and have this for tracking.
In some cases single-parser-multiple-callbacks could be faster, and I expect it's doable in principle with the underlying SAX-like gem. Maybe I'll implement this one day...

(It may already be possible to abuse Conditions with complex lambda(s) but that's no fun. The goal here is independent callback blocks.)

[thisismydesign]

Yes, only one .get or .get_with_conditions callback is expected. This is a good point, I will make it explicit in the README.

As you figured it's possible to match multiple items with complex conditions or even with using both key and nesting_level parameters with get.

It's also true that a single-parser-multiple-callbacks is in principle doable and could be faster in these cases.

One thing to keep in mind with future and current implementation is that we currently throw away yielded data, otherwise the purpose of streaming would be defeated. Because of this nested results are problematic. I.e. if you yield something that could later be a part of another match it will no longer be available. So in some SAX callbacks we'd need to check whether the partial data could be matched in the future before we remove it. I think this is not an issue for get but not sure about the current way of non-explicit custom conditions.

In any case, it would be a nice improvement. :)

[thisismydesign]

Updated the README. If you're ok with it please close the issue.

[cben]

👍