employee/employee.dynamic/src/test/java/tests/TestDynamicUsingAPI.java

/*******************************************************************************
 * Copyright (c) 1998, 2013 Oracle. All rights reserved.
 * This program and the accompanying materials are made available under the 
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 
 * which accompanies this distribution. 
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     dclarke - Dynamic Persistence INCUBATION - Enhancement 200045
 *               http://wiki.eclipse.org/EclipseLink/Development/JPA/Dynamic
 *     
 * This code is being developed under INCUBATION and is not currently included 
 * in the automated EclipseLink build. The API in this code may change, or 
 * may never be included in the product. Please provide feedback through mailing 
 * lists or the bug database.
 ******************************************************************************/
package tests;

import javax.persistence.EntityManager;
import static example.PersistenceHelper.EMPLOYEE_API_PU;
import javax.persistence.EntityManagerFactory;

import org.eclipse.persistence.dynamic.DynamicClassLoader;
import org.eclipse.persistence.dynamic.DynamicType;
import org.eclipse.persistence.jpa.dynamic.JPADynamicHelper;
import org.eclipse.persistence.tools.schemaframework.SchemaManager;
import org.junit.Test;

import example.EmployeeDynamicMappings;
import example.PersistenceHelper;
import example.Queries;
import example.Samples;
import example.Transactions;

public class TestDynamicUsingAPI {

    @Test
    public void runDynamicAPITest() {
        // Create a dynamic class loader and create the types.
        DynamicClassLoader dcl = new DynamicClassLoader(Thread.currentThread().getContextClassLoader());
        DynamicType[] types = EmployeeDynamicMappings.createTypes(dcl, "example.jpa.dynamic.model.employee");

        // Create an entity manager factory.
        EntityManagerFactory emf = PersistenceHelper.createEntityManagerFactory(dcl, EMPLOYEE_API_PU, true);

        // Create JPA Dynamic Helper (with the emf above) and after the types
        // have been created and add the types through the helper.
        JPADynamicHelper helper = new JPADynamicHelper(emf);
        helper.addTypes(true, true, types);

        // Create database and populate
        new SchemaManager(helper.getSession()).replaceDefaultTables();

        EntityManager em = emf.createEntityManager();
        em.getTransaction().begin();
        new Samples(emf).persistAll(em);
        em.getTransaction().commit();
        em.clear();

        // Lookup types
        DynamicType empType = helper.getType("Employee");

        // Run Queries
        Queries queries = new Queries();

        int minEmpId = queries.minimumEmployeeId(em);
        queries.findEmployee(em, empType, minEmpId);
        queries.findEmployeesUsingGenderIn(em);

        // Example transactions
        Transactions txn = new Transactions();

        txn.createUsingPersist(em);

        em.close();
        emf.close();
    }

}