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);
}
}
private <T extends ObjectFilter> Restriction findAndCreateRestrictionInternal(
T filter,
InterpretationContext context,
Restriction parent,
ItemPathResolver resolver,
JpaEntityDefinition baseEntityDefinition)
throws QueryException {
// the order of processing restrictions can be important, so we do the selection via handwritten
// code
if (filter instanceof AndFilter) {
return new AndRestriction(context, (AndFilter) filter, baseEntityDefinition, parent);
} else if (filter instanceof OrFilter) {
return new OrRestriction(context, (OrFilter) filter, baseEntityDefinition, parent);
} else if (filter instanceof NotFilter) {
return new NotRestriction(context, (NotFilter) filter, baseEntityDefinition, parent);
} else if (filter instanceof InOidFilter) {
return new InOidRestriction(context, (InOidFilter) filter, baseEntityDefinition, parent);
} else if (filter instanceof OrgFilter) {
return new OrgRestriction(context, (OrgFilter) filter, baseEntityDefinition, parent);
} else if (filter instanceof TypeFilter) {
TypeFilter typeFilter = (TypeFilter) filter;
JpaEntityDefinition refinedEntityDefinition =
resolver.findRestrictedEntityDefinition(baseEntityDefinition, typeFilter.getType());
return new TypeRestriction(context, typeFilter, refinedEntityDefinition, parent);
} else if (filter instanceof ExistsFilter) {
ExistsFilter existsFilter = (ExistsFilter) filter;
ItemPath path = existsFilter.getFullPath();
ItemDefinition definition = existsFilter.getDefinition();
ProperDataSearchResult<JpaEntityDefinition> searchResult =
resolver.findProperDataDefinition(
baseEntityDefinition, path, definition, JpaEntityDefinition.class);
if (searchResult == null) {
throw new QueryException(
"Path for ExistsFilter ("
+ path
+ ") doesn't point to a hibernate entity within "
+ baseEntityDefinition);
}
return new ExistsRestriction(
context, existsFilter, searchResult.getEntityDefinition(), parent);
} else if (filter instanceof RefFilter) {
RefFilter refFilter = (RefFilter) filter;
ItemPath path = refFilter.getFullPath();
ItemDefinition definition = refFilter.getDefinition();
ProperDataSearchResult<JpaReferenceDefinition> searchResult =
resolver.findProperDataDefinition(
baseEntityDefinition, path, definition, JpaReferenceDefinition.class);
if (searchResult == null) {
throw new QueryException(
"Path for RefFilter ("
+ path
+ ") doesn't point to a reference item within "
+ baseEntityDefinition);
}
return new ReferenceRestriction(
context,
refFilter,
searchResult.getEntityDefinition(),
parent,
searchResult.getLinkDefinition());
} else if (filter instanceof PropertyValueFilter) {
PropertyValueFilter valFilter = (PropertyValueFilter) filter;
ItemPath path = valFilter.getFullPath();
ItemDefinition definition = valFilter.getDefinition();
ProperDataSearchResult<JpaPropertyDefinition> propDefRes =
resolver.findProperDataDefinition(
baseEntityDefinition, path, definition, JpaPropertyDefinition.class);
if (propDefRes == null) {
throw new QueryException(
"Couldn't find a proper restriction for a ValueFilter: " + valFilter.debugDump());
}
// TODO can't be unified?
if (propDefRes.getTargetDefinition() instanceof JpaAnyPropertyDefinition) {
return new AnyPropertyRestriction(
context,
valFilter,
propDefRes.getEntityDefinition(),
parent,
propDefRes.getLinkDefinition());
} else {
return new PropertyRestriction(
context,
valFilter,
propDefRes.getEntityDefinition(),
parent,
propDefRes.getLinkDefinition());
}
} else if (filter instanceof NoneFilter
|| filter instanceof AllFilter
|| filter instanceof UndefinedFilter) {
// these should be filtered out by the client
throw new IllegalStateException(
"Trivial filters are not supported by QueryInterpreter: " + filter.debugDump());
} else {
throw new IllegalStateException("Unknown filter: " + filter.debugDump());
}
}
