Hanane, I also tried to parse complex features using gt-wfs-ng and was unsuccessful getting it to parse nested features. Here is the Jira issue I recorded: https://osgeo-org.atlassian.net/browse/GEOT-5246
Here is my attempt to write an example: https://github.com/bencaradocdavies/geotools/commit/9e8d9c22d1f3ddfd0b180f7f53dae17457be9786 In particular, I had to add this line in the implementation or maxfeatures is ignored: https://github.com/bencaradocdavies/geotools/commit/9e8d9c22d1f3ddfd0b180f7f53dae17457be9786#diff-06f3dfd7325273d8e9fbe0043aa98abdR117 I do not know if it is broken for all features types, or just the GeoSciML service I tried. Kind regards, Ben. On 06/06/16 23:25, Hanane Eljabiri wrote: > Hi Everyone, > > I am trying to retrieve some complex features served by a WFS service. > > The WFS I am trying to parse is created from a specific configuration > with a mapping file. > > The link to the WFS considered is > https://wfspoc.brgm-rec.fr/geoserver/ows?service=wfs&version=2.0.0&request=GetFeature&typename=ef:EnvironmentalMonitoringFacility&COUNT=1 > > To respond to my use case, I have tried to use the example of complex > features request in the following > linkhttp://old.geotools.org/ComplexFeature-Parsing-and-Building-Support_229736622.html > > Unfortunately, I have got the following issues: > > 1) I obtain a null value for the DataStore when I set the proprety > WFSDataStoreFactory:GML_COMPLIANCE_LEVELto 2. It seems that there is a > test which compares the value of GMLCompliance Level to a static > maximum value defined in > the source of Geotools. The Maximum value has been set to 0 ! > > I end up by setting the value of GML-Compliance-Level to 0 in my connection > parameters. > > Here is the code I use to establish a connection and to get an > instance of data store: > > // 1. Configure: > > > String getCapabilitiesURL = > "https://wfspoc.brgm-rec.fr/geoserver/ows?service=wfs&version=2.0.0&request=GetCapabilities";; > > > Map<String, Serializable> connectionParameters = *new* HashMap<String, > Serializable>(); > > > connectionParameters.put("WFSDataStoreFactory:GET_CAPABILITIES_URL", > getCapabilitiesURL); > > > > > > connectionParameters.put("WFSDataStoreFactory:TIMEOUT", 1000); > > > connectionParameters.put("WFSDataStoreFactory:PROTOCOL", *false*); > > > /** #A: Require a Factory with this > level of compliance. **/ > > > connectionParameters.put("WFSDataStoreFactory:GML_COMPLIANCE_LEVEL", 0); > > > connectionParameters.put("WFSDataStoreFactory:MAXFEATURES", 2); > > > /** #B: Specify the location of the > folder to be used by *app*-schema-resolver. **/ > > > connectionParameters.put("WFSDataStoreFactory:SCHEMA_CACHE_LOCATION", > "C:/schema_cache"); > > > > > // 2. Find suitable DataAccess: > > > /** #C: Notice that these classes > are the non-Simple forms. **/ > > DataAccess<FeatureType, Feature> dataAccess = > DataAccessFinder.*getDataStore*(connectionParameters); > > > > Once I set the gml compliance to 0, I get the next following issue: > > 2) The Geotools parser raises an > exception when parsing my WFS response when it encounters an empty date value > for the element : <gml:beginPosition/> > > Here is the code I am using : > > // 3. Declare the type you're > interested in (this could be done by iterating through the typeNames in > dataStore.getTypeNames()). > > > Name nameToRetrieve = *new* > NameImpl("http://inspire.ec.europa.eu/schemas/ef/4.0";, ":", > "ef_EnvironmentalMonitoringFacility"); > > > > > // 4. Get the FeatureSource > (WFSContentComplexFeatureSource): > > > FeatureSource<FeatureType, > Feature> featureSource = dataAccess.getFeatureSource(nameToRetrieve); > > > > > > // 5. Get the FeatureType (AKA > schema): > > > FeatureType schema = dataAccess.getSchema(nameToRetrieve); > > > > > // 6. Create Query using the schema. > > > Query query = *new* Query("ef_EnvironmentalMonitoringFacility"); > > > query.setMaxFeatures(1); > > > > query.setCoordinateSystem(schema.getGeometryDescriptor().getCoordinateReferenceSystem()); > > > > > // 7. Get the features and their > corresponding types: > > > FeatureCollection<FeatureType, > Feature> features = featureSource.getFeatures(query); > > > > > // 8. Iterate over the features and > display them: > > > FeatureIterator<Feature> iterator = features.features(); > > > > > *try* { > > > *while* (iterator.hasNext()) { > > > Feature feature = iterator.next(); > > > *for* (Property property : feature.getProperties()) { > > > System.*out*.println(property); > > > } > > > } > > > } *finally* { > > > iterator.close(); > > } > > I get the following error although my WFS response seems to be correct! (I > have > tried to validate the GML using an external xml validator which uses > xsd mentioned > in the beginning of the GML response and the result was positive) : > > > > java.lang.IllegalArgumentException: Failed to > parse date at: > > at > org.geotools.xml.impl.DatatypeConverterImpl.parseDate(DatatypeConverterImpl.java:197) > > at > org.geotools.xs.bindings.XSDateBinding.parse(XSDateBinding.java:105) > > at > org.geotools.gml3.bindings.TimePositionUnionBinding.parse(TimePositionUnionBinding.java:102) > > at > org.geotools.xml.impl.ParseExecutor.visit(ParseExecutor.java:154) > > at > org.geotools.xml.impl.BindingWalker$BindingExecutionChain.execute(BindingWalker.java:227) > > at > org.geotools.xml.impl.BindingWalker.walk(BindingWalker.java:186) > > at > org.geotools.xml.impl.ElementHandlerImpl.endElement(ElementHandlerImpl.java:236) > > at > org.geotools.xml.impl.ParserHandler.endElement(ParserHandler.java:744) > > at > org.geotools.xml.PullParser.parse(PullParser.java:107) > > at > org.geotools.data.wfs.internal.parsers.PullParserFeatureReader.parse(PullParserFeatureReader.java:80) > > at > org.geotools.data.wfs.WFSFeatureReader.<init>(WFSFeatureReader.java:43) > > at > org.geotools.data.wfs.WFSFeatureSource.getReaderInternal(WFSFeatureSource.java:262) > > at > org.geotools.data.wfs.WFSFeatureStore.getReaderInternal(WFSFeatureStore.java:154) > > at > org.geotools.data.store.ContentFeatureSource.getReader(ContentFeatureSource.java:634) > > at > org.geotools.data.store.ContentFeatureCollection.features(ContentFeatureCollection.java:173) > > at > org.geotools.data.store.ContentFeatureCollection.features(ContentFeatureCollection.java:58) > > at > org.datalift.parsingTools.GMLParsing.ComplexFeatureRequest(GMLParsing.java:124) > > at > org.datalift.parsingTools.GMLParsing.main(GMLParsing.java:79) > > > > I am using Geotools 14.3 and jdk > 1.7.0_79 > > I would appreciate any help to deal with those issues or even if you > could suggest me another way to parse complex features > in my WFS response. > > Thank you > > > > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic > patterns at an interface-level. Reveals which users, apps, and protocols are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity > planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e > > > > _______________________________________________ > GeoTools-GT2-Users mailing list > GeoTools-GT2-Users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > -- Ben Caradoc-Davies <b...@transient.nz> Director Transient Software Limited <http://transient.nz/> New Zealand ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. 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