see comments below
1. How do I transfer an array of FilterRequest objects? Do I need a
separate class in the common part?
yes, you need to define a class whose structure correspond to your array of
FilterRequest Object
have a look at existing "common" part of existing plugin for example
(outline is a easy one)
2. How should the wsdl for the FilterRequest class look like? Probably
<complexType name="FilterRequest">
<all>
<element name="layerId" type="xsd:string"/>
<element name="filter" type="xsd:string"/>
</all>
</complexType>
you only need the wsdl part if you use cartoweb in Soap mode. If you use it
in direct mode, you can ignore the wsdl.
again, for example, have a look at the outline plugin
But how do I handle the array of requests?
the root element need to be an array, and its children will be of
FilterRequest type
3. Which function on the server side should I use to handle the request
and set the filter strings?
Since you seem to want to set the data of layers on the fly, you must act
before the handleDrawing function. I would do it in the handlePreDrawing
stage.
(see http://www.cartoweb.org/doc/misc/plugins_diagram.pdf)
then it is just a matter of using mapOverlay to set the change you have
passed in your FilterRequests.
And finally a general question:
I would like to prevent that Cartoweb fails and shows an error message if
the provided filter is wrong, e.g. syntax errors. Supposed a user provides
an incorrect filter string, can I somehow test the filter and ignore it?
a wrong provider will most certainly trigger a mapserver error.
maybe you can catch it in the handlePostDrawing, but im not sure, i never
tried to handle mapserver errors.
regards
Oliver
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