Ok thanks a lot .
Regards,Fawzy
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29. May 2018 13:21 by [email protected]
<mailto:[email protected]>:
> Hi,> sorry I cannot be of further assistance, but encourage you to spend
> extra time and make debugger> attachment work... that's what I would do, at
> the very least.
> Cheers> Andrea
> On Tue, May 29, 2018 at 11:05 AM, <> [email protected]
> <mailto:[email protected]>> > wrote:
>
>> >> Hi Andrea,>> Thanks for your reply again.
>> I was not able to attach a debugger to the process, however I debugged it
>> with System.err.print.
>> Any way, I found that the reason for the NullPointerException is that the
>> passed feature is null>> public Object evaluate(Object feature) {
>> Expression paramsExpression = params.get(0);
>> int geomId = paramsExpression.evaluate(feature, Integer.class);
>> ....
>> }>> I don't know why the feature is null !! I looked into the code of
>> HeatmapProcess but was not able to find the reason. Could you please help?
>>
>> My SLD is:
>> <ogc:Function name="vec:Heatmap">
>> <ogc:Function name="parameter">
>> <ogc:Literal>data</ogc:Literal>
>> </ogc:Function>
>> <ogc:Function name="parameter">
>> <ogc:Literal>weightAttr</ogc:Literal>
>> <ogc:Function name="MyFunction">
>> <ogc:PropertyName>gtid</ogc:PropertyName>
>> </ogc:Function>
>> </ogc:Function>
>> </ogc:Function>
>> Regards,>> Fawzy
>>
>> --
>> Securely sent with Tutanota. Claim your encrypted mailbox today!
>> https://tutanota.com <https://tutanota.com>
>>
>> 27. May 2018 16:01 by >> [email protected]
>> <mailto:[email protected]>>> :
>>
>>
>>> Hi,>>> I had a cursory look at the heatmap process modifications, they seem
>>> fine to me (but did not try them).>>> Suggestion, attach a debugger, stick
>>> a breakpoint in the process execute method, and see what >>> expression
>>> you're really getting, and trace to the source of the issue from there.
>>> Cheers>>> Andrea
>>>
>>> On Sun, May 27, 2018 at 12:52 PM, <>>> [email protected]
>>> <mailto:[email protected]>>>> > wrote:
>>>
>>>> >>>> Hi Andrea,
>>>> Thanks a lot for your reply.
>>>> It works partially, with a problem.
>>>> When I do the following, it works:
>>>> <ogc:Function name="vec:Heatmap">
>>>> <ogc:Function name="parameter">
>>>> <ogc:Literal>data</ogc:Literal>
>>>> </ogc:Function>
>>>> <ogc:Function name="parameter">
>>>> <ogc:Literal>weightAttr</ogc:Literal>
>>>> <ogc:Function name="MyFunction">
>>>> <ogc:Literal>120</ogc:Literal>
>>>> </ogc:Function>
>>>> </ogc:Function>
>>>> </ogc:Function>
>>>>
>>>> Here I'm passing the parameter as a literal value (120), but I need to
>>>> pass the id field not a literal value, so I did the following, but It
>>>> doesn't work:
>>>> <ogc:Function name="vec:Heatmap">
>>>> <ogc:Function name="parameter">
>>>> <ogc:Literal>data</ogc:Literal>
>>>> </ogc:Function>
>>>> <ogc:Function name="parameter">
>>>> <ogc:Literal>weightAttr</ogc:Literal>
>>>> <ogc:Function name="MyFunction">
>>>> <ogc:PropertyName>gtid</ogc:PropertyName>
>>>> </ogc:Function>
>>>> </ogc:Function>
>>>> </ogc:Function>
>>>>
>>>> It gives a NullPointerExeption at the 2nd line of my evaluate function:
>>>> public Object evaluate(Object feature) {
>>>> Expression paramsExpression = params.get(0);
>>>> int geomId = paramsExpression.evaluate(feature, Integer.class);
>>>> ....
>>>> }
>>>>
>>>> MyFunction works perfectly in other situations, such as the following:
>>>> <PointSymbolizer>
>>>> <Graphic>
>>>> <Mark>
>>>> <WellKnownName>circle</WellKnownName>
>>>> <Fill>
>>>> <CssParameter name="fill">#FF0000</CssParameter>
>>>> </Fill>
>>>> </Mark>
>>>> <Size>
>>>> <ogc:Function name="MyFunction">
>>>> <ogc:PropertyName>gtid</ogc:PropertyName>
>>>> </ogc:Function>
>>>> </Size>
>>>> </Graphic>
>>>> </PointSymbolizer>
>>>>
>>>> I've attached the HeatmapProcess.java after modification (all
>>>> modifications are marked with "CR#temp")
>>>>
>>>> Regards,
>>>> Fawzy
>>>>
>>>> --
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>>>>
>>>> 26. May 2018 17:08 by >>>> [email protected]
>>>> <mailto:[email protected]>>>>> :
>>>>
>>>>
>>>>> Hi,>>>>> the current definition of the process only accepts a String:
>>>>> https://github.com/geotools/geotools/blob/865cc72a90b07841a4c871d1b07fcc8e5defd35b/modules/unsupported/process-feature/src/main/java/org/geotools/process/vector/HeatmapProcess.java#L140
>>>>>
>>>>> <https://github.com/geotools/geotools/blob/865cc72a90b07841a4c871d1b07fcc8e5defd35b/modules/unsupported/process-feature/src/main/java/org/geotools/process/vector/HeatmapProcess.java#L140>
>>>>>
>>>>> You'll have to modify the process so that it accepts an Expression
>>>>> instead, and then>>>>> you should be able to call it like this
>>>>> (completely untested, mind, I hope it's going to work but I'm not sure):
>>>>> <ogc:Function name="vec:Heatmap">
>>>>> <ogc:Function name="parameter">
>>>>> <ogc:Literal>data</ogc:>>>>> Literal>
>>>>> </ogc:Function>
>>>>> <ogc:Function name="parameter">
>>>>> <ogc:Literal>weightAttr</ogc:>>>>> Literal>
>>>>> <>>>>> ogc:Function name="yourFunction">>>>>>
>>>>> ....>>>>> </ogc:Function>
>>>>> </ogc:Function>
>>>>> </ogc:Function>
>>>>>
>>>>> Cheers>>>>> Andrea
>>>>>
>>>>> On Sat, May 26, 2018 at 3:47 PM, <>>>>> [email protected]
>>>>> <mailto:[email protected]>>>>>> > wrote:
>>>>>
>>>>>> >>>>>> Hi,
>>>>>> In Geoserver's heat-map, as mentioned in the documentations, I can
>>>>>> select the weightAtrr field, for example:
>>>>>>
>>>>>> <ogc:Function name="vec:Heatmap">
>>>>>> <ogc:Function name="parameter">
>>>>>> <ogc:Literal>data</ogc:Literal>
>>>>>> </ogc:Function>
>>>>>> <ogc:Function name="parameter">
>>>>>> <ogc:Literal>weightAttr</ogc:Literal>
>>>>>> <ogc:Literal>field1</ogc:Literal>
>>>>>> </ogc:Function>
>>>>>> </ogc:Function>
>>>>>>
>>>>>> My situation is that the weight attribute, that I want to create the
>>>>>> heat-map depending on it, is not a field of the layer, it's a Geotools
>>>>>> custom function that I created. This function takes the field id as a
>>>>>> parameter, and makes some queries according to it, then returns a
>>>>>> number. For example the function is in the form:
>>>>>> int GetTheValue(int id)
>>>>>>
>>>>>> My question is that how to make this in SLD.
>>>>>>
>>>>>> <ogc:Function name="vec:Heatmap">
>>>>>> <ogc:Function name="parameter">
>>>>>> <ogc:Literal>data</ogc:Literal>
>>>>>> </ogc:Function>
>>>>>> <ogc:Function name="parameter">
>>>>>> <ogc:Literal>weightAttr</ogc:Literal>
>>>>>> <!-- call the function here -->
>>>>>> </ogc:Function>
>>>>>> </ogc:Function>
>>>>>>
>>>>>> Regards,>>>>>> Fawzy
>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> Check out the vibrant tech community on one of the world's most
>>>>>> engaging tech sites, Slashdot.org! >>>>>> http://sdm.link/slashdot
>>>>>> <http://sdm.link/slashdot>
>>>>>> _______________________________________________
>>>>>> Geoserver-users mailing list
>>>>>>
>>>>>> Please make sure you read the following two resources before posting to
>>>>>> this list:
>>>>>> - Earning your support instead of buying it, but Ian Turton: >>>>>>
>>>>>> http://www.ianturton.com/talks/foss4g.html#/
>>>>>> <http://www.ianturton.com/talks/foss4g.html#/>
>>>>>> - The GeoServer user list posting guidelines: >>>>>>
>>>>>> http://geoserver.org/comm/userlist-guidelines.html
>>>>>> <http://geoserver.org/comm/userlist-guidelines.html>
>>>>>>
>>>>>> If you want to request a feature or an improvement, also see this:
>>>>>> >>>>>>
>>>>>> https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer
>>>>>>
>>>>>> <https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer>
>>>>>>
>>>>>>
>>>>>> [email protected]
>>>>>> <mailto:[email protected]>
>>>>>> https://lists.sourceforge.net/lists/listinfo/geoserver-users
>>>>>> <https://lists.sourceforge.net/lists/listinfo/geoserver-users>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>
>>>>> Regards,Andrea Aime==GeoServer Professional Services from the experts!
>>>>> Visit >>>>> http://goo.gl/it488V <http://goo.gl/it488V>>>>>> for more
>>>>> information.==Ing. Andrea Aime @geowolfTechnical LeadGeoSolutions
>>>>> S.A.S.Via di Montramito 3/A55054 Massarosa (LU)phone: +39 0584
>>>>> 962313fax: +39 0584 1660272mob: +39 339 8844549>>>>>
>>>>> http://www.geo-solutions.it <http://www.geo-solutions.it>>>>>>
>>>>> http://twitter.com/geosolutions_it
>>>>> <http://twitter.com/geosolutions_it>>>>>>
>>>>> ------------------------------------------------------->>>>> Con
>>>>> riferimento alla normativa sul trattamento dei dati personali (Reg. UE
>>>>> 2016/679 - Regolamento generale sulla protezione dei dati “GDPR”), si
>>>>> precisa che ogni circostanza inerente alla presente email (il suo
>>>>> contenuto, gli eventuali allegati, etc.) è un dato la cui conoscenza è
>>>>> riservata al/i solo/i destinatario/i indicati dallo scrivente. Se il
>>>>> messaggio Le è giunto per errore, è tenuta/o a cancellarlo, ogni altra
>>>>> operazione è illecita. Le sarei comunque grato se potesse darmene
>>>>> notizia.This email is intended only for the person or entity to which it
>>>>> is addressed and may contain information that is privileged, confidential
>>>>> or otherwise protected from disclosure. We remind that - as provided by
>>>>> European Regulation 2016/679 “GDPR” - copying, dissemination or use of
>>>>> this e-mail or the information herein by anyone other than the intended
>>>>> recipient is prohibited. If you have received this email by mistake,
>>>>> please notify us immediately by telephone or e-mail.
>>>>>
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> Regards,Andrea Aime==GeoServer Professional Services from the experts!
>>> Visit >>> http://goo.gl/it488V <http://goo.gl/it488V>>>> for more
>>> information.==Ing. Andrea Aime @geowolfTechnical LeadGeoSolutions S.A.S.Via
>>> di Montramito 3/A55054 Massarosa (LU)phone: +39 0584 962313fax: +39 0584
>>> 1660272mob: +39 339 8844549>>> http://www.geo-solutions.it
>>> <http://www.geo-solutions.it>>>> http://twitter.com/geosolutions_it
>>> <http://twitter.com/geosolutions_it>>>>
>>> ------------------------------------------------------->>> Con riferimento
>>> alla normativa sul trattamento dei dati personali (Reg. UE 2016/679 -
>>> Regolamento generale sulla protezione dei dati “GDPR”), si precisa che ogni
>>> circostanza inerente alla presente email (il suo contenuto, gli eventuali
>>> allegati, etc.) è un dato la cui conoscenza è riservata al/i solo/i
>>> destinatario/i indicati dallo scrivente. Se il messaggio Le è giunto per
>>> errore, è tenuta/o a cancellarlo, ogni altra operazione è illecita. Le
>>> sarei comunque grato se potesse darmene notizia.This email is intended only
>>> for the person or entity to which it is addressed and may contain
>>> information that is privileged, confidential or otherwise protected from
>>> disclosure. We remind that - as provided by European Regulation 2016/679
>>> “GDPR” - copying, dissemination or use of this e-mail or the information
>>> herein by anyone other than the intended recipient is prohibited. If you
>>> have received this email by mistake, please notify us immediately by
>>> telephone or e-mail.
>>>
>>
>
>
>
> --
>
> Regards,Andrea Aime==GeoServer Professional Services from the experts! Visit
> > http://goo.gl/it488V <http://goo.gl/it488V>> for more information.==Ing.
> Andrea Aime @geowolfTechnical LeadGeoSolutions S.A.S.Via di Montramito
> 3/A55054 Massarosa (LU)phone: +39 0584 962313fax: +39 0584 1660272mob: +39
> 339 8844549> http://www.geo-solutions.it <http://www.geo-solutions.it>>
> http://twitter.com/geosolutions_it <http://twitter.com/geosolutions_it>>
> -------------------------------------------------------> Con riferimento alla
> normativa sul trattamento dei dati personali (Reg. UE 2016/679 - Regolamento
> generale sulla protezione dei dati “GDPR”), si precisa che ogni circostanza
> inerente alla presente email (il suo contenuto, gli eventuali allegati, etc.)
> è un dato la cui conoscenza è riservata al/i solo/i destinatario/i indicati
> dallo scrivente. Se il messaggio Le è giunto per errore, è tenuta/o a
> cancellarlo, ogni altra operazione è illecita. Le sarei comunque grato se
> potesse darmene notizia.This email is intended only for the person or entity
> to which it is addressed and may contain information that is privileged,
> confidential or otherwise protected from disclosure. We remind that - as
> provided by European Regulation 2016/679 “GDPR” - copying, dissemination or
> use of this e-mail or the information herein by anyone other than the
> intended recipient is prohibited. If you have received this email by mistake,
> please notify us immediately by telephone or e-mail.
>------------------------------------------------------------------------------
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Please make sure you read the following two resources before posting to this
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If you want to request a feature or an improvement, also see this:
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