Total row count for pagination using JPA Criteria API

Question

I am implementing \"Advanced Search\" kind of functionality for an Entity in my system such that user can search that entity using multiple conditions(eq,ne,gt,lt,like etc)

Answer 1

Why don't you just use count?

CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery cQuery = builder.createQuery(Long.class);
Root from = cQuery.from(Brand.class);
CriteriaQuery select = cQuery.select(builder.count(from));
.
.
//Created many predicates and added to **Predicate[] pArray**
.
.
select.where(pArray);
// Added orderBy clause
TypedQuery typedQuery = em.createQuery(select);
typedQuery.setFirstResult(startIndex);
//typedQuery.setMaxResults(pageSize);
// here is the size of your query 
Long result = typedQuery.getSingleResult();