[Gvsig_english] SLD grammar syntax

Fri Apr 27 11:11:25 CEST 2012

Hello. Instead of the boring:

[Field] >= 3.14159

you can use Ancient Egypt's approximate fraction:

[Field] >= (256 / 81)

Hope it helps ;-)

Juan Lucas Domínguez Rubio
---
Prodevelop SL, Valencia (España)
Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
http://www.prodevelop.es <http://www.prodevelop.es/> 
---

________________________________

De: gvsig_internacional-bounces at listserv.gva.es en nombre de Antonio Falciano
Enviado el: vie 27/04/2012 10:50
Para: gvsig_internacional at listserv.gva.es
Asunto: Re: [Gvsig_english] SLD grammar syntax

Il 27/04/2012 10.13, Pablo Cuadrado ha scritto:
> Hi,
> In gvSIG 1.11 works with [field]>=0.5

Hi Pablo,
yes, I can confirm, so this is only a new bug in gvSIG 1.12 devel.

> Antonio, ¿Do you know a reference about this grammar?

About SLD syntax? Unfortunately not, but it's quite similar to SQL.
I suggest only to remember these basic rules:
1) use only the available operators in the right textbox;
2) use "text" instead of 'text' (differently from the Filter syntax);
3) wildcards are not allowed;
4) finally, check always if the expression is valid ...That's all! ;)

Cheers,
Antonio

> Regards.
> --------------------
> Pablo Cuadrado
>
> ------------------------------------------------------------------------
> *De:* Antonio Falciano
> *Para:* gvsig_internacional at listserv.gva.es
> *Enviado:* Viernes 27 de abril de 2012 9:57
> *Asunto:* Re: [Gvsig_english] SLD grammar syntax
>
> Hi all,
> there aren't dark secrets behind... It seems a bug: the parser of
> the Expression filter doesn't accept floating decimal, in fact:
>
> [Field]>= 5 ...works like a charm
>
> [Field]>= 0.5 ...returns a NumberFormatException
>
>  From the gvsig.log of gvSIG 1.12 devel (build 1406):
>
> For input string: "[Field]" java.lang.NumberFormatException: For input
> string: "[Field]" sun.misc.FloatingDecimal.readJavaFormatString(Unknown
> Source) java.lang.Double.valueOf(Unknown Source) java.lang.Double.
> (Unknown Source)
> org.gvsig.symbology.fmap.rendering.filter.operations.GreaterThanOrEqualsOperator.evaluate(GreaterThanOrEqualsOperator.java:74)
>
>
> org.gvsig.symbology.fmap.rendering.VectorFilterExpressionLegend.getSymbolByFeature(VectorFilterExpressionLegend.java:178)
>
> com.iver.cit.gvsig.fmap.layers.FLyrVect._draw(FLyrVect.java:448)
> com.iver.cit.gvsig.fmap.layers.FLyrVect.draw(FLyrVect.java:627)
> com.iver.cit.gvsig.fmap.DefaultMapContextDrawer.draw(DefaultMapContextDrawer.java:209)
>
>
> com.iver.cit.gvsig.fmap.DefaultMapContextDrawer.draw(DefaultMapContextDrawer.java:175)
>
> com.iver.cit.gvsig.fmap.MapContext.draw(MapContext.java:1088)
> com.iver.cit.gvsig.fmap.MapControl$PaintingRequest.paint(MapControl.java:1043)
>
>
> com.iver.cit.gvsig.fmap.MapControl$Drawer2$Worker.run(MapControl.java:1234)
> java.lang.Thread.run(Unknown Source)
>
> Cheers,
> Antonio
>
> Il 26/04/2012 22.21, Pablo Cuadrado ha scritto:
>  > Hi Benjamin,
>  > For me is dark too....but trying it works.
>  > With [field]>=0.5 works.... ¿=?
>  > In more complex expressions I have a lot of errors and I donZt locate a
>  > good reference about this grammar.
>  > Best regards.
>  > --------------------
>  > Pablo Cuadrado
>  >
>  > ------------------------------------------------------------------------
>  > *De:* Benjamin Ducke <benducke at fastmail.fm <mailto:benducke at fastmail.fm>>
>  > *Para:* Users and Developers mailing list
>  > <gvsig_internacional at listserv.gva.es
> <mailto:gvsig_internacional at listserv.gva.es>>
>  > *Enviado:* Jueves 26 de abril de 2012 17:29
>  > *Asunto:* [Gvsig_english] SLD grammar syntax
>  >
>  > Dear All,
>  >
>  > could someone shed some light on this eternal dark
>  > secret of gvSIG and provide some "SLD grammar" examples
>  > that can be used with the "Expression" filter and the
>  > advanced labeling?
>  >
>  > E.g. in the "Expression" filter (Symbology) I try to
>  > simply filter out all features for which "Field" has a
>  > value equal or greater than "0.5". I enter the following:
>  >
>  > [Field] >= 0.5
>  >
>  > And get an "Invalid expression" error.
>  >
>  > What would be the correct syntax?
>  >
>  > Thanks,
>  >
>  > Ben
>  >
>  > --
>  > Benjamin Ducke
>  > {*} Geospatial Consultant
>  > {*} GIS Developer
>  >
>  > benducke at fastmail.fm <mailto:benducke at fastmail.fm>
> <mailto:benducke at fastmail.fm <mailto:benducke at fastmail.fm%20%3Cmailto:benducke at fastmail.fm> >>
>  > _______________________________________________
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> --
> Antonio Falciano
> http://www.linkedin.com/in/antoniofalciano
> _______________________________________________
> Gvsig_internacional mailing list
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--
Antonio Falciano
http://www.linkedin.com/in/antoniofalciano
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