I think you want these: http://docs.geoserver.org/latest/en/user/data/app-schema/polymorphism.html#null-or-missing-value http://docs.geoserver.org/latest/en/user/data/app-schema/polymorphism.html#recode-function
But I don't know if they will help without feature chaining. Rini? On 05/10/10 16:04, Andrea Aime wrote: > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-devel > -- Ben Caradoc-Davies <[email protected]> Software Engineering Team Leader CSIRO Earth Science and Resource Engineering Australian Resources Research Centre ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
