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
