private void interpretPagingAndSorting(
InterpretationContext context, ObjectQuery query, boolean countingObjects)
throws QueryException {
RootHibernateQuery hibernateQuery = context.getHibernateQuery();
String rootAlias = hibernateQuery.getPrimaryEntityAlias();
if (query != null && query.getPaging() instanceof ObjectPagingAfterOid) {
ObjectPagingAfterOid paging = (ObjectPagingAfterOid) query.getPaging();
if (paging.getOidGreaterThan() != null) {
Condition c =
hibernateQuery.createSimpleComparisonCondition(
rootAlias + ".oid", paging.getOidGreaterThan(), ">");
hibernateQuery.addCondition(c);
}
}
if (!countingObjects && query != null && query.getPaging() != null) {
if (query.getPaging() instanceof ObjectPagingAfterOid) {
updatePagingAndSortingByOid(
hibernateQuery,
(ObjectPagingAfterOid)
query.getPaging()); // very special case - ascending ordering by OID (nothing more)
} else {
updatePagingAndSorting(context, query.getPaging());
}
}
}
protected void updatePagingAndSortingByOid(
RootHibernateQuery hibernateQuery, ObjectPagingAfterOid paging) {
String rootAlias = hibernateQuery.getPrimaryEntityAlias();
if (paging.getOrderBy() != null
|| paging.getDirection() != null
|| paging.getOffset() != null) {
throw new IllegalArgumentException(
"orderBy, direction nor offset is allowed on ObjectPagingAfterOid");
}
hibernateQuery.addOrdering(rootAlias + ".oid", OrderDirection.ASCENDING);
if (paging.getMaxSize() != null) {
hibernateQuery.setMaxResults(paging.getMaxSize());
}
}