public void query(int ofst, Sorting srtg, boolean force)
throws EmptyListException, IndexOutOfBoundsException, ListingException {
if (!force && listHandler.size() < 1) {
throw new EmptyListException("No list elements exist");
}
if (ofst < 0 || (!force && ofst > listHandler.size() - 1)) {
throw new IndexOutOfBoundsException("Listing offset " + ofst + " is out of bounds");
}
// do we need to actually re-query?
final Sorting sorting = getSorting();
if (!force
&& elements != null
&& this.offset == ofst
&& sorting != null
&& sorting.equals(srtg)) {
return;
}
// query
final int psize = pageSize == -1 ? listHandler.size() : pageSize;
try {
elements = listHandler.getElements(ofst, psize, srtg);
} catch (final EmptyListException e) {
throw e;
} catch (final ListHandlerException e) {
throw new ListingException(listingId, e.getMessage());
}
// update offset
this.offset = ofst;
}
public Sorting getSorting() {
return listHandler.getSorting();
}
public int size() {
return listHandler.size();
}