Thanks for the feedback Stefano and Andrea.
So it doesn't matter how I try to map the entities, i.e. the app-schema
mappings, the problem is with the schema :(
Stefano I tried to find the discussion you refer on the mailing lists
but could not find it, better I found to much information
about this, can you pass me the link :)
You say that you already stepped on something like this how did you
manage to work around it ?
Thanks,
Nuno Oliveira
One doubt remain, and this one is for the app-schema experts :), is there a
On 11/02/2016 10:09 AM, Nuno Oliveira wrote:
Hi,
I have a doubt regarding the way GML complex features encoder handles
a sub collection of features, i.e. chained features.
The example use case is the representation of some meteorological
stations measurements in GML. The complex feature
represents a station were the measurements are represented as a sub
collection of features. The XML expected representation
would be something like this:
<?xml version="1.0" encoding="UTF-8"?>
<wfs:FeatureCollection ...>
<st:featureMember>
<st:StationFeature gml:id="1">
<st:name>station 1</st:name>
<st:contact>
<st:mail>stati...@mail.com</st:mail>
</st:contact>
<st:measurement>
<st:name>temp</st:name>
<st:unit>c</st:unit>
<st:value>35.5</st:value>
</st:measurement>
<st:measurement>
<st:name>wind</st:name>
<st:unit>km/h</st:unit>
<st:value>110.5</st:value>
</st:measurement>
<st:geometry>
<gml:Point
srsName="http://www.opengis.net/gml/srs/epsg.xml#4326";>
<gml:coordinates>50.0,60.0</gml:coordinates>
</gml:Point>
</st:geometry>
</st:StationFeature>
</gml:featureMember>
</wfs:FeatureCollection>
The first GML based schema I wrote for this didn't work, i.e. the
measurements sub collection was not encoded by
the encoder, please find that schema attached with name stations1.xsd.
After some investigation I found that my
problem was in this piece of code:
https://github.com/geotools/geotools/blob/master/modules/extension/xsd/xsd-gml3/src/main/java/org/geotools/gml3/bindings/ComplexSupportXSAnyTypeBinding.java#L176-L177
Basically no child elements were extracted, and in this case the child
elements were the station measurements. After checking
the app-schema examples I came up with this second schema that worked,
please find that schema attached with name stations2.xsd.
The main difference is that I wrapped the measurement element with the
MeasurmentPropertyType:
<xs:complexType name="MeasurementPropertyType">
<xs:sequence minOccurs="0">
<xs:element ref="st:Measurement"/>
</xs:sequence>
<xs:attributeGroup ref="gml:AssociationAttributeGroup"/>
</xs:complexType>
This stations use case is just an example, I have a much more complex
use case with the same problem were I cannot change the schema.
So I'm wondering, did anyone had a similar use case ? did I made
something wrong in the app-schema mappings-file ? is this something is
just not supported by the encoder ? and did my first schema actually
makes sense (in my point of view it looks sane) ?
Any help with this will be very very welcomed :)
Regards,
Nuno Oliveira
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