| We have a specific use case to color code WMS based on number of specific attribute in complex features.
e.g. if there is 1 xyz attribute -> color red, if there are 2 xyz attributes -> color blue, etc. For this I picked up existing LengthFunction in gt-main. I am not really sure the difference between this and strLength function (except strLength is a FilterFunction). Anyway, I made it return number of attributes for complex attributes. If the text length is what users are after, they should be using strLength. Usage in test example: <sld:CssParameter name="fill">
<ogc:Function name="Recode">
<!-- Value to transform -->
<ogc:Function name="length">
<ogc:PropertyName>gsml:specification/gsml:GeologicUnit/gsml:occurrence</ogc:PropertyName>
</ogc:Function>
<ogc:Literal>1</ogc:Literal>
<!-- yellow -->
<ogc:Literal>#ffff00</ogc:Literal>
<ogc:Literal>2</ogc:Literal>
<!-- blue -->
<ogc:Literal>#0000ff</ogc:Literal>
<ogc:Literal>3</ogc:Literal>
<!-- red -->
<ogc:Literal>#ff0000</ogc:Literal>
</ogc:Function>
</sld:CssParameter> |
