Dear developers,
I'm seeing what seems to me a misbehavior in the way app-schema handles
attribute mappings containing only client properties.
Let's suppose I have a source property file for the gsml:MappedFeature type
(I'm using GeoSciML 2.0 application schema) like this one:
_=ID:String,OBS_METHOD:String
mf1=mf1|obs_method_1
mf1=mf1|obs_method_2
mf1=mf1|obs_method_3
mf4=mf4|obs_method_1
The data is denormalized. I would like to map the OBS_METHOD field to the
target attribute gsml:observationMethod/gsml:CGI_TermValue/gsml:value,
which is a single-valued attribute nested inside a multi-valued one
(gsml:observationMethod). I expect that "Multivalued properties from
denormalised sources (the same source feature ID appears more than once)
are automatically encoded", as the docs say, and, in fact, that checks out:
MappedFeature mf1 ends up having three gsml:observationMethod attributes,
each with a different nested gsml:value.
The mapping I used:
<AttributeMapping>
<targetAttribute>gsml:observationMethod/gsml:CGI_TermValue/gsml:value
</targetAttribute>
<isMultiple>true</isMultiple>
<encodeIfEmpty>true</encodeIfEmpty>
<sourceExpression>
<OCQL>OBS_METHOD</OCQL>
</sourceExpression>
</AttributeMapping>
Now, if I take the same OBS_METHOD field and map it to a ClientProperty
(e.g. xlink:href) of a multi-valued attribute, without also defining a
<sourceEpression> for it, it does not work as expected.
The mapping I tried:
<AttributeMapping>
<targetAttribute>gml:metaDataProperty</targetAttribute>
<isMultiple>true</isMultiple>
<encodeIfEmpty>true</encodeIfEmpty>
<ClientProperty>
<name>xlink:href</name>
<value>strConcat('#meta.', OBS_METHOD)</value>
</ClientProperty>
</AttributeMapping>
What I expected to see:
...
<gml:metaDataProperty xlink:href="#meta.obs_method_1" />
<gml:metaDataProperty xlink:href="#meta.obs_method_2" />
<gml:metaDataProperty xlink:href="#meta.obs_method_3" />
...
What I got instead:
...
<gml:metaDataProperty xlink:href="#meta.obs_method_3" /> <--- only the
last value is actually encoded
...
Here is a test class to reproduce the issue:
https://github.com/ridethepenguin/app-schema-testbench/blob/master/src/test/java/it/geosolutions/appschema/test/DenormalizedSingleValueNestedInMultiValueTest.java
The test testObservationMethod() succeeds, while the
test testMetadataProperty() fails.
Am I wrong in my expectations, or is this really a bug?
--
Best regards,
Stefano Costa
==
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==
Dott. Stefano Costa
Senior Software Engineer
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
http://www.geo-solutions.ithttp://twitter.com/geosolutions_it
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