Andrea Aime wrote:
> On Tue, Dec 21, 2010 at 6:57 AM, Miles Jordan
> <[email protected]> wrote:
>> Hmm.. trying to use the PropertyExists function and not sure how to
> reference the feature. I would have thought that it would only take
> one argument, the propertyName, but the docs say:
>>
>> Name - PropertyExists Arguments - f:Feature, propertyName:String
>> Description - Returns true if f has a property named propertyName
>>
> All functions get the current feature as an implicit argument. I
> guess the documentation is wrong :-p
>
> The function would have to be called like:
>
> <ogc:Function name="PropertyExists">
> <ogc:Literal>MY_PROPERTY</ogc:Literal>
> </ogc:Function>
That's what I thought, in fact I tried it, but got a NPE. Digging deeper, it
works fine by itself but not inside of a boolean operation. i.e. this works:
<ogc:Filter>
<ogc:PropertyExists>
<ogc:Literal>MY_PROPERTY</ogc:Literal>
</ogc:PropertyExists>
</ogc:Filter>
But this does not:
<ogc:Filter>
<ogc:And>
<ogc:PropertyExists>
<ogc:Literal>MY_PROPERTY</ogc:Literal>
</ogc:PropertyExists>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>MY_PROPERTY</ogc:PropertyName>
<ogc:Literal>1</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:And>
</ogc:Filter>
In fact, the Boolean operation will work with other functions, just not with
PropertyExists. Any final thoughts before I head over to JIRA? I haven't tried
this on the latest Beta.
Log excerpt: http://pastebin.com/82KWWkpu
Regards,
Miles
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