Пример #1
0
 /** Construct a join predicate on collection (eg many to many, List) */
 public <T> List<Predicate> byExampleOnManyToMany(
     ManagedType<T> mt,
     Root<T> mtPath,
     final T mtValue,
     SearchParameters sp,
     CriteriaBuilder builder) {
   List<Predicate> predicates = newArrayList();
   for (PluralAttribute<T, ?, ?> pa : mt.getDeclaredPluralAttributes()) {
     if (pa.getCollectionType() == PluralAttribute.CollectionType.LIST) {
       List<?> values = (List<?>) JpaUtil.getValue(mtValue, mt.getAttribute(pa.getName()));
       if (values != null && !values.isEmpty()) {
         if (sp.getUseANDInManyToMany()) {
           if (values.size() > 3) {
             log.warn(
                 "Please note that using AND restriction on an Many to Many relationship requires as many joins as values");
           }
           for (Object value : values) {
             ListJoin<T, ?> join = mtPath.join(mt.getDeclaredList(pa.getName()));
             predicates.add(join.in(value));
           }
         } else {
           ListJoin<T, ?> join = mtPath.join(mt.getDeclaredList(pa.getName()));
           predicates.add(join.in(values));
         }
       }
     }
   }
   return predicates;
 }
Пример #2
0
 /**
  * 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;
 }