Hi
Following the instructions here:
https://docs.geoserver.org/stable/en/user/data/app-schema/mapping-file.html#sql-based-data-stores
This is the relevant part of my mapping file:
<AttributeMapping>
<targetAttribute>er:sourceReference</targetAttribute>
<jdbcMultipleValue>
<sourceColumn>eno</sourceColumn>
<targetTable>mv_er_sourcereference</targetTable>
<targetColumn>eno</targetColumn>
</jdbcMultipleValue>
<ClientProperty>
<name>xlink:href</name>
<value>href</value>
</ClientProperty>
<ClientProperty>
<name>xlink:title</name>
<value>title</value>
</ClientProperty>
</AttributeMapping>
The er:sourceReference attribute doesn't take a string value, so the
'targetValue' field is left blank, the same way you might do a simple source
expression with a null OCQL value and client properties.
However, this throws an error:
java.lang.RuntimeException: java.lang.RuntimeException: Error applying mapping
with targetAttribute er:sourceReference
java.lang.RuntimeException: Error applying mapping with targetAttribute
er:sourceReference
Error applying mapping with targetAttribute er:sourceReference
Which in the logs is:
Caused by: java.lang.NullPointerException
at
org.geotools.data.complex.DataAccessMappingFeatureIterator.extractMultipleValues(DataAccessMappingFeatureIterator.java:909)
at
org.geotools.data.complex.DataAccessMappingFeatureIterator.setAttributeValue(DataAccessMappingFeatureIterator.java:653)
at
org.geotools.data.complex.DataAccessMappingFeatureIterator.computeNext(DataAccessMappingFeatureIterator.java:1345)
Which in my debugger suggests it is this line of code:
https://github.com/geotools/geotools/blob/8805a4640f62a56e6158762856eeb49ed70f4644/modules/extension/app-schema/app-schema/src/main/java/org/geotools/data/complex/DataAccessMappingFeatureIterator.java#L906
Object targetValue = jdbcMultipleValue.getTargetValue().evaluate(readFeature);
jdbcMultipleValue.getTargetValue() is null and therefore it throws an NPE
I'm not sure if this is a bug or by design, but my intent is to get multiple
references linked by xlink:href and xlink:title
Thanks
Michael
Geoscience Australia Disclaimer: This e-mail (and files transmitted with it) is
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