[fpc-pascal] JSON - RTTI streaming.

Burkhard Carstens fpc at bcsoft.de
Mon May 16 00:50:27 CEST 2011

Am Donnerstag, 6. Januar 2011 00:12 schrieb Michael Van Canneyt:
> Hello,
> For those of you that need JSON support:
> I have committed support for streaming published properties
> (properties for which RTTI  is generated) from objects to
> JSON and vice versa, in a unit fpjsonrtti.
> Not the full streaming as implemented in the classes system is
> supported: - No DefineProperties.
> - No methods.
> Although it should not be difficult to add support for this.
> In contrast, it can stream simple collections and stringlists
> (with ojects attached) in various ways.
> There are various events to influence the streaming process.
> This should be more than enough to stream objects to and from a
> web-browser.
> I have committed an example and a testsuite.
> All this is in packages/fcl-json.
> Despite the fact that the testsuite runs OK ,
> I'd like to ask those for whom it might be useful to test the
> code and report any errors you find to me. Suggestions for
> improvements are also welcome.

This is great!
A quick first test (streaming/destreaming a TPanel with childs) fails 
with: Unsuported JSON type for object property: "jtNull"
This is line 296 in fpjsonrtti. Maybe jtNull should be interpreted as 
nil here..


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