Re: [udig-devel] Problem with custom SLD style

[Jody Garnett <jody.garnett@xxxxxxxxx>]

Oh cool.

Yeah the glphy code creates a fake feature in the hopes of drawing
something "in your style". We should put some catch statements around
that and perhaps draw the feature in B&W if we were unable to figure
out  the style?

Lukasz can you sort out a way for us to reproduce the problem with the
default dataset? perhaps just an SLD we can cut and paste into the
style editor?

Jody

2010/8/6 Lukasz Stawicki <stl@xxxxxxxxxx>:
> Hi,
>
> I used <ogc:Function name="Categorize"> instead of if_then_else. Anyway, it
> crashes in CategorizeFunction.java line 152:
>
>  String lookupValue = lookupExp.evaluate(object, String.class);
>
> Object is null - I debugged it up and finally digged what a object is
> evaluated. net.refractions.udig.ui.graphics.Glyph.java, line 363.
>
>
>                d.drawDirect( image, display,
>                        d.feature(d.line(new int[]{0,12, 6,3, 11,12, 15,3})),
>                        rule );
>
> Line is created for line symbolizer, and as this line is not a feature, it
> causes side-effects. I also checked that if_then_else comes into problems
> just in the same place.
>
> Any help would be greatly appreciated.
>
> regards
>
> Lukasz
>
> Cytowanie Jody Garnett <jody.garnett@xxxxxxxxx>:
>
>> Please keep discussion on the list (that way I can be corrected by others
>> :-D ).
>>
>> Sorry for the quick message before; was focused on getting a bug report
>> in. I was not being intentionally opaque - the geotools website is down for
>> me as well.
>>
>> Looking at the code the functions are:
>> - CategorizeFunction
>> - InterpolateFunction
>> - RecodeFunction
>>
>> Example docs for the first one:
>> Implementation of "Categorize" as a normal function.
>>
>> This implementation is compatible with the Function interface; the
>> parameter list can be used to set the threshold values etc...
>>
>> This function expects:
>>
>> PropertyName; use "Rasterdata" to indicate this is a color map
>> Literal: lookup value
>> Literal: threshold 1
>> Literal: value 1
>> Literal: threshold 2
>> Literal: value 2
>> Literal: (Optional) succeeding or preceding
>> For more details please look at the Symbology Encoding specification
>> (which provides the definition of these functions and examples.
>>
>> Best thing to do is look at test cases:
>> -
>> http://svn.osgeo.org/geotools/trunk/modules/library/render/src/test/java/org/geotools/filter/
>>
>> Here is an example from the test cases:
>>
>>        final String[] categories = {"low", "mid", "high", "super"};
>>        final Double[] thresholds = {0.0, 50.0, 100.0};
>>        setupParameters(categories, thresholds);
>>
>>        Function fn = finder.findFunction("categorize", parameters);
>>
>> Cheers,
>> Jody
>>
>>
>> On 05/08/2010, at 7:00 PM, Lukasz Stawicki wrote:
>>
>>> Jody,
>>>
>>> I know I can use more <sld:Rule...> entries instead of using
>>> <ogc:Function name="if_then_else"> but this will make my SLD file 10 times
>>> longer (and unable to maintain it). What are the other options for managing
>>> colors?
>>>
>>> regards
>>>
>>> Lukasz
>>>
>>>
>>> Cytowanie Jody Garnett <jody.garnett@xxxxxxxxx>:
>>>
>>>> The GeoTools website was hacked last month; I think the DNS is being
>>>> updated now to point to a new server.
>>>>
>>>> As for your example; you are doing a lot of work to map colours?  There
>>>> is a couple of color lookup functions available now
>>>> which should make it easier.
>>>>
>>>> I have reported your issue here:
>>>> - https://jira.codehaus.org/browse/GEOT-3234
>>>>
>>>> On 05/08/2010, at 4:14 PM, Lukasz Stawicki wrote:
>>>>
>>>>>
>>>>> java.lang.IllegalArgumentException: Filter Function problem for
>>>>> function if_then_else argument #0 - expected type boolean
>>>>>        at
>>>>> org.geotools.filter.function.FilterFunction_if_then_else.evaluate(FilterFunction_if_then_else.java:45)
>>>>>        at
>>>>> org.geotools.filter.expression.ExpressionAbstract.evaluate(ExpressionAbstract.java:63)
>>>>>        at org.geotools.styling.SLD.color(SLD.java:1312)
>>>>>        at org.geotools.styling.SLD.color(SLD.java:96)
>>>>>        at org.geotools.styling.SLD.lineColor(SLD.java:84)
>>>>>        at org.geotools.styling.SLD.color(SLD.java:188)
>>>>>        at net.refractions.udig.ui.Drawing.paint(Drawing.java:308)
>>>>>        at net.refractions.udig.ui.Drawing.drawFeature(Drawing.java:246)
>>>>>        at net.refractions.udig.ui.Drawing.drawFeature(Drawing.java:223)
>>>>>        at net.refractions.udig.ui.Drawing.drawDirect(Drawing.java:150)
>>>>>        at
>>>>> net.refractions.udig.ui.graphics.Glyph$6.getImageData(Glyph.java:363)
>>>>
>>>>
>>>
>>>
>>>
>>
>>
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