How to deal with sis.util UnconvertibleObjectException (reading WFS data)

[Emmanuel Blondel]

Hello,

I'm currently using sis 0.5-M1-jdk7 version inferred with geotk 4.0-M2, 
and trying to implement a list of features retrieved from WFS.
The featureType i want to download includes a Property which type is 
"int", and causes the following issue:

*org.apache.sis.util.UnconvertibleObjectException: Ne peut pas convertir 
du type ‘String’ vers le type ‘int’.**
**    at 
org.apache.sis.internal.converter.ConverterRegistry.find(ConverterRegistry.java:500)**
**    at 
org.apache.sis.util.ObjectConverters.convert(ObjectConverters.java:120)*
    at 
org.geotoolkit.feature.xml.jaxp.JAXPStreamFeatureReader.readValue(JAXPStreamFeatureReader.java:475)
    at 
org.geotoolkit.feature.xml.jaxp.JAXPStreamFeatureReader.readFeature(JAXPStreamFeatureReader.java:418)
    at 
org.geotoolkit.feature.xml.jaxp.JAXPStreamFeatureReader.readFeatureCollection(JAXPStreamFeatureReader.java:256)
    at 
org.geotoolkit.feature.xml.jaxp.JAXPStreamFeatureReader.read(JAXPStreamFeatureReader.java:181)
    at 
org.geotoolkit.feature.xml.jaxp.JAXPStreamFeatureReader.read(JAXPStreamFeatureReader.java:130)
    at org.virtual.ows.WfsReader.retrieve(WfsReader.java:43)
    at org.virtual.ows.WfsReader.retrieve(WfsReader.java:1)
    at org.virtualrepository.impl.Repository$1.call(Repository.java:282)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

I would appreciate if you can explain how to deal with this issue.

Many thanks in advance
Emmanuel