dao.jpa.JpaUtilsTest.java Source code

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Here is the source code for dao.jpa.JpaUtilsTest.java

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/*
 * Copyright 2009-2012 Jose Luis Martin.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package dao.jpa;

import static org.junit.Assert.assertEquals;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Join;
import javax.persistence.criteria.Root;

import org.jdal.dao.jpa.JpaUtils;
import org.junit.Ignore;
import org.junit.Test;
import org.springframework.transaction.annotation.Transactional;

/**
 * Base test for JpaUtils
 *  
 * @author Jose Luis Martin
 */
@Ignore
public class JpaUtilsTest {

    @PersistenceContext
    EntityManager em;

    @Test
    @Transactional
    public void testCountFromCriteria() {
        CriteriaBuilder cb = em.getCriteriaBuilder();
        CriteriaQuery<Book> bookQuery = cb.createQuery(Book.class);
        Root<Book> root = bookQuery.from(Book.class);
        bookQuery.where(cb.equal(JpaUtils.getPath(root, "author.name"), "Rod"));
        CriteriaQuery<Long> countQuery = JpaUtils.countCriteria(em, bookQuery);
        Long result = Long.valueOf(em.createQuery(bookQuery).getResultList().size());

        assertEquals(result, (Long) em.createQuery(countQuery).getSingleResult());

    }

    @Test
    @Transactional
    public void testCountFromComplexCriteria() {
        CriteriaBuilder cb = em.getCriteriaBuilder();
        CriteriaQuery<Book> bookQuery = cb.createQuery(Book.class);
        Root<Book> root = bookQuery.from(Book.class);
        Join<Book, Category> join = root
                .join(em.getMetamodel().entity(Book.class).getSingularAttribute("category", Category.class));
        bookQuery.where(cb.equal(join.<String>get("name"), "Java"));
        bookQuery.from(Author.class);
        bookQuery.select(root);
        CriteriaQuery<Long> countQuery = JpaUtils.countCriteria(em, bookQuery);
        Long result = Long.valueOf(em.createQuery(bookQuery).getResultList().size());

        assertEquals(result, (Long) em.createQuery(countQuery).getSingleResult());
    }

    @Test
    @Transactional
    public void testInitialize() {
        CriteriaBuilder cb = em.getCriteriaBuilder();
        CriteriaQuery<Category> c = cb.createQuery(Category.class);
        Root<Category> root = c.from(Category.class);
        c.where(cb.equal(JpaUtils.getPath(root, "name"), "Java"));
        List<Category> list = em.createQuery(c).getResultList();
        Category cat = list.get(0);
        JpaUtils.initialize(em, cat, 2);
        cat.getBooks().contains(new Book());
    }
}