Sort a container with some datas contains in a sub container

Hi !

Is-there any solution to sort a container with using a field contain in sub container ?

I explain my request :

I've got a containerlist for my pages :
<content:declareContainerList name="docContainerList" title="Doc Container List" titleKey="docContainerList" bundleKey="<%=resBundleID%>">
<content:declareContainer>
<content:declareField name="docLink" title="Link" titleKey="link" bundleKey="<%=resBundleID%>" type="Page" />
</content:declareContainer>
</content:declareContainerList>
All my pages contains metadatas declared as follow :
jData.containers().declareField( "metadataDate", ResourceBundleMarker.drawMarker(resBundleID, "date", "Date"), FieldTypes.DATE, "<jahia_calendar[dd mon yyyy]>");
jData.containers().declareField( "metadataDescription", ResourceBundleMarker.drawMarker(resBundleID, "description","Description"), FieldTypes.SMALLTEXT, (String) pageContext.findAttribute("defaultMetaDescription") );
jData.containers().declareField( "metadataKeywords", ResourceBundleMarker.drawMarker(resBundleID, "keywords","Keywords"), FieldTypes.SMALLTEXT, (String) pageContext.findAttribute("defaultMetaKeyword") );
Vector metadataFields = new Vector();
metadataFields.add( "metadataDate" );
metadataFields.add( "metadataDescription" );
metadataFields.add( "metadataKeywords" );
jData.containers().declareContainer( "metadataContainer", ResourceBundleMarker.drawMarker(resBundleID, "metadataContainer","Metadata Container"), metadataFields );
And I want to sort the docContainerList on the metadataDate field.

How can I do with the container sort handlers ?
Do I need to create my own sort handlers ?

Thanks in advance.

Ghislain CUSSONNEAU

La Poste - DIPM

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