/**
* Invoke byExample method for each not null x-to-one association when their pk is not set. This
* allows you to search entities based on an associated entity's properties value.
*/
@SuppressWarnings("unchecked")
public <T extends Identifiable<?>, M2O extends Identifiable<?>> List<Predicate> byExampleOnXToOne(
ManagedType<T> mt,
Root<T> mtPath,
final T mtValue,
SearchParameters sp,
CriteriaBuilder builder) {
List<Predicate> predicates = newArrayList();
for (SingularAttribute<? super T, ?> attr : mt.getSingularAttributes()) {
if (attr.getPersistentAttributeType() == MANY_TO_ONE
|| attr.getPersistentAttributeType() == ONE_TO_ONE) {
M2O m2oValue = (M2O) JpaUtil.getValue(mtValue, mt.getAttribute(attr.getName()));
Class<M2O> m2oType = (Class<M2O>) attr.getBindableJavaType();
Path<M2O> m2oPath = (Path<M2O>) mtPath.get(attr);
ManagedType<M2O> m2oMt = em.getMetamodel().entity(m2oType);
if (m2oValue != null) {
if (m2oValue.isIdSet()) { // we have an id, let's restrict only on this field
predicates.add(builder.equal(m2oPath.get("id"), m2oValue.getId()));
} else {
predicates.addAll(byExample(m2oMt, m2oPath, m2oValue, sp, builder));
}
}
}
}
return predicates;
}
@Override
public Map<String, Map<String, Class<?>>> getTableColumnMap() {
Metamodel metamodel = entityManager.getEntityManagerFactory().getMetamodel();
Set<EntityType<?>> entityTypes = metamodel.getEntities();
Map<String, Map<String, Class<?>>> tableColumnMap =
new HashMap<String, Map<String, Class<?>>>();
for (EntityType<?> type : entityTypes) {
EntityType<Entity> entityType = (EntityType<Entity>) type;
Set<SingularAttribute<? super Entity, ?>> singularAttributes =
entityType.getSingularAttributes();
Map<String, Class<?>> columnMap = new HashMap<String, Class<?>>();
for (SingularAttribute<? super Entity, ?> singularAttribute : singularAttributes) {
columnMap.put(singularAttribute.getName(), singularAttribute.getJavaType());
}
tableColumnMap.put(entityType.getName(), columnMap);
}
return tableColumnMap;
}
@SuppressWarnings("unchecked")
private static String getEntityIdField(EntityManager em, Class entity) {
String idProperty = "";
Metamodel metamodel = em.getMetamodel();
EntityType e = metamodel.entity(entity);
Set<SingularAttribute> singularAttributes = e.getSingularAttributes();
for (SingularAttribute singularAttribute : singularAttributes) {
if (singularAttribute.isId()) {
idProperty = singularAttribute.getName();
break;
}
}
return idProperty;
}
@Override
public String toString() {
return attribute.getName() + " == " + value;
}