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On a request like this one:
<wfs:GetFeature xmlns:wfs="http://www.opengis.net/wfs/2.0" count="10" service="WFS" startIndex="0" version="2.0.0"> <wfs:Query xmlns:ns54="http://cite.opengeospatial.org/gmlsf" typeNames="ns54:PrimitiveGeoFeature ns54:PrimitiveGeoFeature"> <Filter xmlns="http://www.opengis.net/fes/2.0"> <Intersects> <ValueReference>ns54:PrimitiveGeoFeature/ns54:surfaceProperty</ValueReference> <ValueReference>ns54:PrimitiveGeoFeature/ns54:curveProperty</ValueReference> </Intersects> </Filter> </wfs:Query> </wfs:GetFeature>
GeoServer fails as follows:
org.geoserver.wfs.WFSException: Extracted invalid join filter [ ns54:PrimitiveGeoFeature/ns54:surfaceProperty intersects ns54:PrimitiveGeoFeature/ns54:curveProperty ], it uses the unkonwn alias/typename ns54:PrimitiveGeoFeature
at org.geoserver.wfs.JoinExtractingVisitor.rewriteAndSortOtherFilters(JoinExtractingVisitor.java:387)
at org.geoserver.wfs.JoinExtractingVisitor.getJoins(JoinExtractingVisitor.java:255)
at org.geoserver.wfs.GetFeature.run(GetFeature.java:449)
at org.geoserver.wfs.DefaultWebFeatureService20.getFeature(DefaultWebFeatureService20.java:110)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
The issue happens in JoinExtractingVisitor, which is expecting to find aliases as prefixes, an unqualified type name, or one qualified with the internal prefix, for the properties, while in this case there is a local prefix instead, ns54.
Probably the easiest fix for this case is to preventively rewrite the filter so that it uses the expected prefix instead of the local one (due to how the rest of the JoinExtractingVisitor logic works)
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