> But I'm afraid that, IIUC, `includeProperty()` works "reactively" against
the
> actual incoming JSON stream. Then, it works for matching properties, but
> it could not work for non-match. (In the example, `includeProperty()`
might
> never be called against "foo" while reading {"xxx":{"yyy":"zzz"}}.)
Ah..., wait, if :
1) `TokenFilter` (extended `JsonPointerBasedFilter`) can be stateful, and
2) `TokenFilter` (extended `JsonPointerBasedFilter`) can detect the end of
the object or the array ("}" or "]"),
it may probably be feasible by :
1') changing the state when `includeProperty` receives "foo", and
2') raising an Exception when the state is not changed at "}"
Let me think a little bit more.
I hope (1) is okay. (2) may be feasible by implementing
`filterFinishObject`?
2023年9月20日(水) 14:30 Dai MIKURUBE <dmikur...@acm.org>:
> Thanks, Tatu!
>
> > I haven't done this, but looking at `JsonPointerBasedFilter` I would
> > probably try overriding `includeProperty()` method to catch the case
> > of non-match. Note that you'd also need to override `includeElement`,
> > and for both make sure to construct an instance of your own sub-class.
> > I think that should allow you to do what you want.
> > I'll also file an issue for minor improvement for
> > `JsonPointerBasedFilter` to make sub-classing bit safer.
>
> But I'm afraid that, IIUC, `includeProperty()` works "reactively" against
> the
> actual incoming JSON stream. Then, it works for matching properties, but
> it could not work for non-match. (In the example, `includeProperty()` might
> never be called against "foo" while reading {"xxx":{"yyy":"zzz"}}.)
>
> `TokenFilter` has many other callback methods. I wondered if some of them
> could be used, but not dived deeper yet. Or, otherwise, I thought that I
> might
> have to hack `FilteringParserDelegate` reimplemented.
>
>
> 2023年9月20日(水) 14:09 Tatu Saloranta <t...@fasterxml.com>:
>
>> On Tue, Sep 19, 2023 at 10:31 AM Dai MIKURUBE <dmikur...@acm.org> wrote:
>> >
>> > Hi,
>> >
>> > I have a sequence of multiple JSONs in a stream, and wanted to filter
>> the sequence by FilteringParserDelegate / JsonPointerBasedFilter.
>> >
>> > It works in normal matching cases. But, I wanted to raise an error when
>> a matching property does not exist.
>>
>> Sounds reasonable.
>>
>> >
>> > For example, in the following case :
>> >
>> > JsonParser parser = new FilteringParserDelegate(
>> >
>>
>> factory.createParser("{\"foo\":{\"bar\":\"baz\"}}{\"xxx\":{\"yyy\":\"zzz\"}}{\"foo\":{\"bar\":\"qux\"}}"),
>> > new JsonPointerBasedFilter("/foo"),
>> > TokenFilter.Inclusion.ONLY_INCLUDE_ALL,
>> > true
>> > );
>> >
>> > This |parser| returns {"bar":"baz"}, and {"bar":"qux"}, with just
>> skipping {"xxx":{"yyy":"zzz"}}.
>> >
>> > Here, I wanted to raise an error (Exception) while reading
>> {"xxx":{"yyy":"zzz"}}.
>> >
>> >
>> > Does anyone know how to realize it? I'm ready to write my own
>> TokenFilter, or to expand JsonPointerBasedFilter by myself.
>>
>> I haven't done this, but looking at `JsonPointerBasedFilter` I would
>> probably try overriding `includeProperty()` method to catch the case
>> of non-match. Note that you'd also need to override `includeElement`,
>> and for both make sure to construct an instance of your own sub-class.
>> I think that should allow you to do what you want.
>> I'll also file an issue for minor improvement for
>> `JsonPointerBasedFilter` to make sub-classing bit safer.
>>
>> -+ Tatu +-
>>
>>
>> >
>> >
>> > Thanks.
>> >
>> > --
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>>
>
>
> --
> Dai MIKURUBE
> dmikur...@acm.org
>
--
Dai MIKURUBE
dmikur...@acm.org
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