The if_then_else function is a bit of a hack, and has corresponding test
functions (like equals()) that must be used with it instead of the normal
Filter elements (SLD disallows Filters as children of Expressions.) See
this gist (including an SLD style and the CSS I used to generate it):
https://gist.github.com/dwins/5859628
Alternatively you could just have multiple rules representing the different
branches of the if-then-else tree. That would look like this gist:
https://gist.github.com/dwins/5859680
Hope it helps.
--
David Winslow
OpenGeo - http://opengeo.org/
On Tue, Jun 25, 2013 at 11:46 AM, Jonathan Moules <
[email protected]> wrote:
> Hi List,
> While waiting on an answer to my other thread, I decided to try and
> tackle the anchor problem. I came up with the following which, in theory at
> least, seems like it should work to get my se:AnchorPointY:
>
>
> Pseudocode version:
>
> If ANCHOR_PT == 0, 3 or 6
>> return 0
>> else if ANCHOR_PT == 1, 4 or 7
>> return 0.5
>> else
>> return 1
>
>
>
>
> SLD version:
>
>
> <ogc:Function name="if_then_else">
>> <ogc:Or>
>> <ogc:Function name="EqualTo">
>> <ogc:PropertyName>ANCHOR_PT</ogc:PropertyName>
>> <ogc:Literal>0</ogc:Literal>
>> </ogc:Function>
>> <ogc:Function name="EqualTo">
>> <ogc:PropertyName>ANCHOR_PT</ogc:PropertyName>
>> <ogc:Literal>3</ogc:Literal>
>> </ogc:Function>
>> <ogc:Function name="EqualTo">
>> <ogc:PropertyName>ANCHOR_PT</ogc:PropertyName>
>> <ogc:Literal>6</ogc:Literal>
>> </ogc:Function>
>> </ogc:Or>
>> <ogc:Literal>0</ogc:Literal>
>> <ogc:Function name="if_then_else">
>> <ogc:Or>
>> <ogc:Function name="EqualTo">
>> <ogc:PropertyName>ANCHOR_PT</ogc:PropertyName>
>> <ogc:Literal>1</ogc:Literal>
>> </ogc:Function>
>> <ogc:Function name="EqualTo">
>> <ogc:PropertyName>ANCHOR_PT</ogc:PropertyName>
>> <ogc:Literal>4</ogc:Literal>
>> </ogc:Function>
>> <ogc:Function name="EqualTo">
>> <ogc:PropertyName>ANCHOR_PT</ogc:PropertyName>
>> <ogc:Literal>7</ogc:Literal>
>> </ogc:Function>
>> </ogc:Or>
>> <ogc:Literal>0.5</ogc:Literal>
>> <ogc:Literal>1</ogc:Literal>
>> </ogc:Function>
>> </ogc:Function>
>
>
>
>
> Unfortunately it's failing validation:
>
>
> - Parsing failed for Or: java.lang.RuntimeException: Unable to find
> function
> - line 36: cvc-complex-type.2.4.a: Invalid content was found starting
> with element 'ogc:Or'. One of '{"http://www.opengis.net/ogc":expression}'
> is expected.
> - line 37: cvc-complex-type.2.4.a: Invalid content was found starting
> with element 'ogc:Function'. One of
> '{"http://www.opengis.net/ogc":comparisonOps,
> "http://www.opengis.net/ogc":spatialOps,
> "http://www.opengis.net/ogc":logicOps}'
> is expected.
>
>
> The "unable to find function" is particularly ominous though all
> referenced functions are in my wfs GetCapabilities.
>
> Anyone able to advise? What am I doing wrong?
> Thanks,
> Jonathan
>
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