I have a style that uses if_then_else to get labelling to line up with a
carrow background graphic at the centroid of a line, Geoserver 2.11.1:
<LabelPlacement>
<PointPlacement>
<Displacement>
<DisplacementX>
<ogc:Function name="if_then_else">
<ogc:Function name="greaterThan">
<ogc:Function name="abs">
<ogc:Function name="endAngle">
<ogc:PropertyName>geom</ogc:PropertyName>
</ogc:Function>
</ogc:Function>
<ogc:Literal>90</ogc:Literal>
</ogc:Function>
<ogc:Literal>14</ogc:Literal>
<ogc:Literal>-22</ogc:Literal>
</ogc:Function>
</DisplacementX>
<DisplacementY>
-3
</DisplacementY>
</Displacement>
...
</PointPlacement>
</LabelPlacement>
(and similar for <Rotation> to get text the right way up)
The style renders with no problems...
<http://osgeo-org.1560.x6.nabble.com/file/t382437/eeh_od_lines.png>
...but when I make a call to GetLegendGraphic this error is generated:
java.lang.IllegalArgumentException: Filter Function problem for
function if_then_else argument #0 -
expected type boolean
The argument is the output from <ogc:Function name="greaterThan"> so it must
be boolean, so there must be something else going on. Ant wisdom much
appreciated.
Thanks,
Ian
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