Example usage for javax.persistence EntityManagerFactory getCriteriaBuilder

Introduction

In this page you can find the example usage for javax.persistence EntityManagerFactory getCriteriaBuilder.

Prototype

public CriteriaBuilder getCriteriaBuilder();

Source Link

Document

Return an instance of CriteriaBuilder for the creation of CriteriaQuery objects.

Usage

From source file:org.jasig.jpa.BaseJpaDao.java

protected final <T> ParameterExpression<T> createParameterExpression(Class<T> paramClass) {
    final EntityManagerFactory entityManagerFactory = entityManager.getEntityManagerFactory();
    final CriteriaBuilder criteriaBuilder = entityManagerFactory.getCriteriaBuilder();

    return criteriaBuilder.parameter(paramClass);
}

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From source file:org.jasig.jpa.BaseJpaDao.java

protected final <T> ParameterExpression<T> createParameterExpression(Class<T> paramClass, String name) {
    final EntityManagerFactory entityManagerFactory = entityManager.getEntityManagerFactory();
    final CriteriaBuilder criteriaBuilder = entityManagerFactory.getCriteriaBuilder();

    return criteriaBuilder.parameter(paramClass, name);
}

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From source file:org.jasig.jpa.BaseJpaDao.java

protected final <T> CriteriaQuery<T> createCriteriaQuery(Function<CriteriaBuilder, CriteriaQuery<T>> builder) {
    final EntityManagerFactory entityManagerFactory = entityManager.getEntityManagerFactory();
    final CriteriaBuilder criteriaBuilder = entityManagerFactory.getCriteriaBuilder();

    final CriteriaQuery<T> criteriaQuery = builder.apply(criteriaBuilder);

    //Do in TX so the EM gets closed correctly
    transactionOperations.execute(new TransactionCallbackWithoutResult() {
        @Override/*from  ww w.  j av a 2  s .  c  o m*/
        protected void doInTransactionWithoutResult(TransactionStatus status) {
            entityManager.createQuery(criteriaQuery); //pre-compile critera query to avoid race conditions when setting aliases
        }
    });

    return criteriaQuery;
}

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From source file:it.attocchi.jpa2.JPAEntityFilter.java

public Predicate getWherePredicate(Class<T> clazz, EntityManagerFactory emf) throws Exception {

    // CriteriaBuilder
    CriteriaBuilder criteriaBuilder = emf.getCriteriaBuilder();

    CriteriaQuery<T> criteriaQuery = criteriaBuilder.createQuery(clazz);
    Root<T> root = criteriaQuery.from(clazz);

    criteriaQuery.select(root);/*from  w  w  w  .j a v  a  2  s.c  o  m*/

    List<Predicate> predicateList = new ArrayList<Predicate>();

    // return getWherePredicates(emf, predicateList, criteriaQuery,
    // criteriaBuilder, root);

    Predicate[] predicates = getWherePredicates(emf, predicateList, criteriaQuery, criteriaBuilder, root);
    Predicate wherePredicate = criteriaBuilder.and(predicates);

    return wherePredicate;
}

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From source file:it.attocchi.jpa2.JPAEntityFilter.java

public CriteriaQuery<T> getCriteria(Class<T> clazz, EntityManagerFactory emf) throws Exception {

    // CriteriaBuilder
    CriteriaBuilder criteriaBuilder = emf.getCriteriaBuilder();

    CriteriaQuery<T> criteriaQuery = criteriaBuilder.createQuery(clazz);
    Root<T> root = criteriaQuery.from(clazz);

    criteriaQuery.select(root);// ww w. ja v a  2s  . com

    // criteria.where( builder.equal( personRoot.get( Utente_.eyeColor ),
    // "brown" ) );

    List<Predicate> predicateList = new ArrayList<Predicate>();

    // buildWhere(emf, predicateList, criteriaQuery, criteriaBuilder, root);
    //
    // Predicate[] predicates = new Predicate[predicateList.size()];
    // predicateList.toArray(predicates);

    Predicate[] predicates = getWherePredicates(emf, predicateList, criteriaQuery, criteriaBuilder, root);
    Predicate wherePredicate = criteriaBuilder.and(predicates);
    criteriaQuery.where(wherePredicate);

    // buildSort(criteriaQuery, criteriaBuilder, root);
    List<Order> orders = new ArrayList<Order>();
    buildSort(orders, criteriaQuery, criteriaBuilder, root);
    if (ListUtils.isNotEmpty(orders))
        criteriaQuery.orderBy(orders);

    return criteriaQuery;
}

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From source file:org.batoo.jpa.benchmark.BenchmarkTest.java

private void test(final EntityManagerFactory emf, Queue<Runnable> workQueue, int length) {
    final CriteriaBuilder cb = emf.getCriteriaBuilder();
    final CriteriaQuery<Address> cq = cb.createQuery(Address.class);

    final Root<Person> r = cq.from(Person.class);
    final Join<Person, Address> a = r.join("addresses");
    a.fetch("country", JoinType.LEFT);
    a.fetch("person", JoinType.LEFT);
    cq.select(a);/*  w  ww  . ja  v  a 2 s .c  o  m*/

    final ParameterExpression<Person> p = cb.parameter(Person.class);
    cq.where(cb.equal(r, p));

    for (int i = 0; i < length; i++) {
        workQueue.add(new Runnable() {

            @Override
            public void run() {
                try {
                    BenchmarkTest.this.singleTest(emf, BenchmarkTest.this.createPersons(), cq, p);
                } catch (final Exception e) {
                    BenchmarkTest.LOG.error(e, "Error while running the test");
                }
            }
        });
    }
}

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