}
private void startFiltering()
{
PatternContext context = evalFilterNode.getContext();
handle = new EPStatementHandleCallback(context.getEpStatementHandle(), this);
FilterValueSet filterValues = evalFilterNode.getFilterSpec().getValueSet(beginState);
context.getFilterService().add(filterValues, handle);
long filtersVersion = context.getFilterService().getFiltersVersion();
context.getStatementFilterVersion().setStmtFilterVersion(filtersVersion);
}