Add CallContext to getListing inside AbstractListingResourceWithGenericId

[matthiasohst]

In order to set the allowed values in the returned schema dynamically, the getListing method of the class AbstractListingResourceWithGenericId should use a CallContext.

For example, if the method

protected CallContext getCallContextForListing(SearchQueryBean searchQueryBean) {
    return Parameter.createContext();
}

is added and the line

return lf.forCall(rel, r -> r.getListing(searchQueryBean));

in the method getListing is replaced by

return lf.forCall(rel, r -> r.getListing(searchQueryBean), getCallContextForListing(searchQueryBean));

then everything should be working as before, with the option to provide a CallContext dynamically.

Similarly, one could also add a CallContext to the link REL_INSTANCE inside the method getListing as well as to those links generated for SummaryType and FullType.

[JoergAdler]

Hi @matthiasohst,

good idea. Would you mind to provide a pull request for this?