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());
}
}
}
private void interpretQueryFilter(InterpretationContext context, ObjectQuery query)
throws QueryException {
if (query != null && query.getFilter() != null) {
Condition c = interpretFilter(context, query.getFilter(), null);
context.getHibernateQuery().addCondition(c);
}
}
public RootHibernateQuery interpret(
ObjectQuery query,
Class<? extends Containerable> type,
Collection<SelectorOptions<GetOperationOptions>> options,
PrismContext prismContext,
boolean countingObjects,
Session session)
throws QueryException {
Validate.notNull(type, "Type must not be null.");
Validate.notNull(session, "Session must not be null.");
Validate.notNull(prismContext, "Prism context must not be null.");
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("Interpreting query for type '{}', query:\n{}", new Object[] {type, query});
}
InterpretationContext context = new InterpretationContext(this, type, prismContext, session);
interpretQueryFilter(context, query);
interpretPagingAndSorting(context, query, countingObjects);
RootHibernateQuery hibernateQuery = context.getHibernateQuery();
if (countingObjects) {
hibernateQuery.addProjectionElement(new ProjectionElement("count(*)"));
} else {
String rootAlias = hibernateQuery.getPrimaryEntityAlias();
hibernateQuery.addProjectionElement(new ProjectionElement(rootAlias + ".fullObject"));
// TODO other objects if parent is requested?
if (context.isObject()) {
hibernateQuery.addProjectionElement(new ProjectionElement(rootAlias + ".stringsCount"));
hibernateQuery.addProjectionElement(new ProjectionElement(rootAlias + ".longsCount"));
hibernateQuery.addProjectionElement(new ProjectionElement(rootAlias + ".datesCount"));
hibernateQuery.addProjectionElement(new ProjectionElement(rootAlias + ".referencesCount"));
hibernateQuery.addProjectionElement(new ProjectionElement(rootAlias + ".polysCount"));
hibernateQuery.addProjectionElement(new ProjectionElement(rootAlias + ".booleansCount"));
hibernateQuery.setResultTransformer(GetObjectResult.RESULT_TRANSFORMER);
} else {
hibernateQuery.addProjectionElement(new ProjectionElement(rootAlias + ".ownerOid"));
hibernateQuery.setResultTransformer(GetContainerableResult.RESULT_TRANSFORMER);
}
}
return hibernateQuery;
}
private <T extends ObjectFilter> Restriction findAndCreateRestriction(
T filter, InterpretationContext context, Restriction parent) throws QueryException {
Validate.notNull(filter, "filter");
Validate.notNull(context, "context");
LOGGER.trace("Determining restriction for filter {}", filter);
ItemPathResolver helper = context.getItemPathResolver();
JpaEntityDefinition baseEntityDefinition;
if (parent != null) {
baseEntityDefinition = parent.getBaseHqlEntityForChildren().getJpaDefinition();
} else {
baseEntityDefinition = context.getRootEntityDefinition();
}
Restriction restriction =
findAndCreateRestrictionInternal(filter, context, parent, helper, baseEntityDefinition);
LOGGER.trace("Restriction for {} is {}", filter.getClass().getSimpleName(), restriction);
return restriction;
}
public <T extends Containerable> void updatePagingAndSorting(
InterpretationContext context, ObjectPaging paging) throws QueryException {
if (paging == null) {
return;
}
RootHibernateQuery hibernateQuery = context.getHibernateQuery();
if (paging.getOffset() != null) {
hibernateQuery.setFirstResult(paging.getOffset());
}
if (paging.getMaxSize() != null) {
hibernateQuery.setMaxResults(paging.getMaxSize());
}
if (!paging.hasOrdering()) {
return;
}
for (ObjectOrdering ordering : paging.getOrderingInstructions()) {
addOrdering(context, ordering);
}
}
private void addOrdering(InterpretationContext context, ObjectOrdering ordering)
throws QueryException {
ItemPath orderByPath = ordering.getOrderBy();
// TODO if we'd like to have order-by extension properties, we'd need to provide itemDefinition
// for them
ProperDataSearchResult<JpaDataNodeDefinition> result =
context
.getItemPathResolver()
.findProperDataDefinition(
context.getRootEntityDefinition(), orderByPath, null, JpaDataNodeDefinition.class);
if (result == null) {
LOGGER.error(
"Unknown path '"
+ orderByPath
+ "', couldn't find definition for it, "
+ "list will not be ordered by it.");
return;
}
JpaDataNodeDefinition targetDefinition = result.getLinkDefinition().getTargetDefinition();
if (targetDefinition instanceof JpaAnyContainerDefinition) {
throw new QueryException(
"Sorting based on extension item or attribute is not supported yet: " + orderByPath);
} else if (targetDefinition instanceof JpaReferenceDefinition) {
throw new QueryException("Sorting based on reference is not supported: " + orderByPath);
} else if (result.getLinkDefinition().isMultivalued()) {
throw new QueryException(
"Sorting based on multi-valued item is not supported: " + orderByPath);
} else if (targetDefinition instanceof JpaEntityDefinition) {
throw new QueryException("Sorting based on entity is not supported: " + orderByPath);
} else if (!(targetDefinition instanceof JpaPropertyDefinition)) {
throw new IllegalStateException("Unknown item definition type: " + result.getClass());
}
JpaEntityDefinition baseEntityDefinition = result.getEntityDefinition();
JpaPropertyDefinition orderByDefinition = (JpaPropertyDefinition) targetDefinition;
String hqlPropertyPath =
context
.getItemPathResolver()
.resolveItemPath(
orderByPath, null, context.getPrimaryEntityAlias(), baseEntityDefinition, true)
.getHqlPath();
if (RPolyString.class.equals(orderByDefinition.getJpaClass())) {
hqlPropertyPath += ".orig";
}
RootHibernateQuery hibernateQuery = context.getHibernateQuery();
if (ordering.getDirection() != null) {
switch (ordering.getDirection()) {
case ASCENDING:
hibernateQuery.addOrdering(hqlPropertyPath, OrderDirection.ASCENDING);
break;
case DESCENDING:
hibernateQuery.addOrdering(hqlPropertyPath, OrderDirection.DESCENDING);
break;
}
} else {
hibernateQuery.addOrdering(hqlPropertyPath, OrderDirection.ASCENDING);
}
}