Package javax.persistence.criteria

Examples of javax.persistence.criteria.CriteriaQuery.select()

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        String jpql = "select c from Customer c "
                    + "where c.name='Autowest Toyota'";
       
        CriteriaQuery q = cb.createQuery();
        Root<Customer> customer = q.from(Customer.class);
        q.select(customer)
         .where(cb.equal(
                customer.get(customer_.getSingularAttribute("name", String.class)),
                "Autowest Toyota"));

        assertEquivalence(q, jpql);
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        Root<Customer> c = q.from(Customer.class);
        SetJoin<Customer, Order> o = c.join(customer_.getSet("orders",
                Order.class));
        ListJoin<Order, LineItem> i = o.join(order_.getList("lineItems",
                LineItem.class));
        q.select(c.get(Customer_.name)).where(
                cb.equal(i.get(lineItem_.getSingularAttribute("product", Product.class))
                    .get(product_.getSingularAttribute("productType", String.class)),
                    "printer"));

        assertEquivalence(q, jpql);
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    public void testTypeExpression() {
        String jpql = "SELECT TYPE(e) FROM Employee e WHERE TYPE(e) <> Exempt";
        CriteriaQuery q = cb.createQuery();
        Root<Employee> emp = q.from(Employee.class);
        q.select(emp.type()).where(cb.notEqual(emp.type(), Exempt.class));

        assertEquivalence(q, jpql);
    }
   
    public void testJoinAndIndexExpression() {
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                LineItem.class));
        Join<Order, Customer> c = o.join(order_.getSingularAttribute("customer",
                Customer.class));
        q.where(cb.equal(c.get(customer_.getSingularAttribute("lastName", String.class)), "Smith"),
                cb.equal(c.get(customer_.getSingularAttribute("firstName", String.class)), "John"));
        q.select(cb.sum(i.get(lineItem_.getSingularAttribute("price", Double.class))));

        assertEquivalence(q, jpql);
    }
   
    public void testSizeExpressionInProjection() {
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        q.where(cb.equal(
                d.get(department_.getSingularAttribute("name", String.class)),
                "Sales"));
        SetAttribute<Department, Employee> employees =
            department_.getDeclaredSet("employees", Employee.class);
        q.select(cb.size(d.get(employees)));
       
        assertEquivalence(q, jpql);
       
    }
   
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    public void testEqualWithAttributeAndLiteral() {
        String jpql = "select a from Account a where a.balance=100";

        CriteriaQuery c = cb.createQuery();
        Root<Account> account = c.from(Account.class);
        c.select(account).where(cb.equal(account.get(Account_.balance), 100));

        assertEquivalence(c, jpql);
    }

    public void testEqualWithAttributeAndAttribute() {
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        return findFormEntities(false, maxResults, firstResult);
    }

    private List<Form> findFormEntities(boolean all, int maxResults, int firstResult) {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        cq.select(cq.from(Form.class));
        Query q = em.createQuery(cq);
        if (!all) {
            q.setMaxResults(maxResults);
            q.setFirstResult(firstResult);
        }
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    }

    public int getFormCount() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        Root<Form> rt = cq.from(Form.class);
        cq.select(em.getCriteriaBuilder().count(rt));
        Query q = em.createQuery(cq);
        return ((Long) q.getSingleResult()).intValue();
    }
}
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        return findFormDataEntities(false, maxResults, firstResult);
    }

    private List<FormData> findFormDataEntities(boolean all, int maxResults, int firstResult) {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        cq.select(cq.from(FormData.class));
        Query q = em.createQuery(cq);
        if (!all) {
            q.setMaxResults(maxResults);
            q.setFirstResult(firstResult);
        }
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    }

    public int getFormDataCount() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        Root<FormData> rt = cq.from(FormData.class);
        cq.select(em.getCriteriaBuilder().count(rt));
        Query q = em.createQuery(cq);
        return ((Long) q.getSingleResult()).intValue();
    }
   
}
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