Hi, in my target schema I have this attribute: <xs:element name="positionAccuracyVector" type="csn:PositionAccuracyVectorType" minOccurs="0"/>
<xs:complexType name="PositionAccuracyVectorType"> <xs:sequence> <xs:element name="x" type="xs:integer"> </xs:element> <xs:element name="y" type="xs:integer"> </xs:element> </xs:sequence> </xs:complexType> As you can see the attribute is optional, but the x/y inside of it are not. I made the following mappings (no feature chaining): <AttributeMapping> <targetAttribute> csndc:positionAccuracyVector/x </targetAttribute> <sourceExpression> <OCQL>position_accuracy_x</OCQL> </sourceExpression> </AttributeMapping> <AttributeMapping> <targetAttribute> csndc:positionAccuracyVector/y </targetAttribute> <sourceExpression> <OCQL>position_accuracy_y</OCQL> </sourceExpression> </AttributeMapping> But the database contains also nulls for the two attributes. I hoped the app-schema store was smart enough to see all the attributes were null and decide not to create the positionAccuracy attribute, but unfortunately that did not work and I get the following exception: org.geotools.feature.IllegalAttributeException:http://www.w3.org/2001/XMLSchema:integer not nillable:null value:null at org.geotools.feature.type.Types.validate(Types.java:112) at org.geotools.feature.type.Types.validate(Types.java:80) at org.geotools.feature.AttributeImpl.<init>(AttributeImpl.java:51) at org.geotools.feature.AppSchemaFeatureFactoryImpl.createAttribute(AppSchemaFeatureFactoryImpl.java:63) at org.geotools.feature.AttributeBuilder.create(AttributeBuilder.java:583) at org.geotools.feature.AttributeBuilder.add(AttributeBuilder.java:495) at org.geotools.data.complex.filter.XPath.setValue(XPath.java:769) Looking at the docs and the AppSchemaDataAccess.xsd grammar I see no way to tell the app schema store whether a attribute is actually present or not. Am I missing some feature, is this a bug or... what? :-) Maybe feature chaining can be used to solve this riddle, but I'm trying to avoid it like a plague, I cannot have n queries made for each feature returned. I guess this might be yet another candidate for xslt-ing... Cheers Andrea ----------------------------------------------------- Ing. Andrea Aime Senior Software Engineer GeoSolutions S.A.S. Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584962313 fax: +39 0584962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf ----------------------------------------------------- ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel