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Re: [Ftpapi] Optional XML Labels

Thomas,
I think he's referring to your statement that RPG doesn't support declaring null-capable fields. However, I think Jon is wrong about 7.2 -- this was a 7.3 feature! But, RPG does support null-capable fields, you can read about it under "What's New in 7.3" in the RPG Reference, search the page for "NULLIND": 

https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/rzasd/rpgrelv7r3.htm


An example would be:

*ctl-opt alwnull(*usrctl);**

**dcl-s myfield_null ind;**
**dcl-s myfield char(50) NULLIND(myfield_null);**
**
myfield_null = *on;   // myfield is now null**
*
(could also use *%nullind(myfield) = ***on*)

etc.
So in 7.3, RPG does support any field being null-capable, so you could potentially add that support to WSDL2RPG, that it uses those null indicators when a SOAP message supports nillable fields to indicate that null to the RPG program. And when generating the response, you could check the null indicators and generate the XML according to whether it is/isn't null.
At least, I think that's what Jon was trying to say. (He didn't provide much detail.) 

-SK

On 3/8/2017 2:08 PM, Thomas Raddatz wrote:

Jon,

Sorry, but what do you think would not work earlier that V7.2? The 4MB
buffer? It is heap storage dynamically allocated by WSDL2RPG and
controlled by the following procedure call:

    hSoapPart =
       MessageContext_getSoapPart(hMsgCtx: 1024*1024*4); // 4 MB cache

Regards,

Thomas.

Am 08.03.2017 um 20:47 schrieb Jon Paris:

It would not work for anything earlier than V7.2 I think Thomas - but the current support for creating your own null capable fields in RPG might lead to a possible solution.


Jon Paris

www.partner400.com
www.SystemiDeveloper.com


On Mar 8, 2017, at 2:31 PM, Thomas Raddatz <thomas.raddatz@xxxxxxxxxxx> wrote:

Christian,

Sadly WSDL2RPG does not support NULL values, which equals a dropped
element. The actual problem is that RPG does not support NULL values and
it is not possible to define "special" values for recognizing a NULL
value. For strings *BLANKS may work, but for example "0" or any other
value does not work for numeric values. So actually you need an
indicator for each nillable field. I did not yet enhanced WSDL2RPG to
support NULL values, because that is a hell lot of work.

Therefore please change the generated stub by hand to meet your needs.

Here are some hints:

a) WSDL2RPG generates a "Serializer" procedure for each data structure
of the request message. So if you do not want to generate a whole data
structure, just return the serializer procedure immediately on a
condition of your choice.

b) Inside the serializer procedure parts of the XML are assigned to
field "g_requestBuffer". Then the content of "g_requestBuffer" is append
to the request message buffer by calling
OutputStream_appendGlobalRequestBuffer(). Afterwards the value of the
XML element is "marshalled" by a type specific "Marshaller", e.g.
Marshaller_toStringV6().

c) Just for your information: The request message buffer is a 4MB memory
block (default value) to cache the request message. When the message
exceeds 4MB it is dumped to an IFS file.

d) It is up to you to define the conditions when a field (XML element)
or data structure (XML complex type) is not added to the request message.

e) You can safely add indicator field to the *_t template variables to
indicate whether or not something shall be serialized. Make sure to
compile everything of the stub after having changed a *_t field.

Regards,

Thomas.

Am 08.03.2017 um 14:16 schrieb larsenvalverde@xxxxxxxxx:

Hello.

I’m using WSDL2RPG  to generate the stubs to connect to a webservice.

I have a problem.

The XML that I have to send (generated by WSDL2RPG), have a lot of “optional labels”.  When I don’t use them, the result XML have a lot of sentences like this:


…
	</LABEL1>
	</LABEL2>
…

(because I cannot send the information of the LABEL1, LABEL2, …).

If I send this to the webservice, the server give me an error, because I’m not sending the information of that “optional” labels.

The question is… have I had to manually change the stubs generated by WSDL2RPG, or there another way to manage them??


Christian.


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