[Cartoweb-users] Creating a filter plugin
oliver.christen at camptocamp.com
Mon Apr 23 02:06:20 EDT 2007
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
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">
> <element name="layerId" type="xsd:string"/>
> <element name="filter" type="xsd:string"/>
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
> 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
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.
More information about the Cartoweb-users