| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.openjpa.persistence.test; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import javax.persistence.EntityTransaction; |
| |
| import org.apache.openjpa.persistence.OpenJPAEntityManager; |
| import org.apache.openjpa.persistence.OpenJPAQuery; |
| |
| /** |
| * A base test case that can be used to easily test scenarios where there |
| * is only a single EntityManager at any given time. |
| * Extends SingleEMFTestCase and cleans up provided EM in tearDown() and relies on |
| * SingEMFTestCase.tearDown() to clean up the EMF it provides. |
| * |
| * @author Marc Prud'hommeaux |
| */ |
| public abstract class SingleEMTestCase |
| extends SingleEMFTestCase { |
| |
| protected OpenJPAEntityManager em; |
| |
| @Override |
| public void setUp() { |
| setUp(new Object[0]); |
| } |
| |
| @Override |
| public void setUp(Object... props) { |
| super.setUp(props); |
| em = emf.createEntityManager(); |
| } |
| |
| /** |
| * Clear the current EntityManager and re-initialize it. |
| */ |
| protected void reset() { |
| close(); |
| em = emf.createEntityManager(); |
| } |
| |
| @Override |
| public void tearDown() throws Exception { |
| closeEM(em); |
| em = null; |
| super.tearDown(); |
| } |
| |
| /** |
| * Start a new transaction if there isn't currently one active. |
| * @return true if a transaction was started, false if one already existed |
| */ |
| protected boolean begin() { |
| EntityTransaction tx = em.getTransaction(); |
| if (tx.isActive()) |
| return false; |
| |
| tx.begin(); |
| return true; |
| } |
| |
| /** |
| * Commit the current transaction, if it is active. |
| * @return true if the transaction was committed |
| */ |
| protected boolean commit() { |
| EntityTransaction tx = em.getTransaction(); |
| if (!tx.isActive()) |
| return false; |
| |
| tx.commit(); |
| return true; |
| } |
| |
| /** |
| * Rollback the current transaction, if it is active. |
| * @return true if the transaction was rolled back |
| */ |
| protected boolean rollback() { |
| EntityTransaction tx = em.getTransaction(); |
| if (!tx.isActive()) |
| return false; |
| |
| tx.rollback(); |
| return true; |
| } |
| |
| /** |
| * Closes the current EntityManager if it is open. |
| * @return false if the EntityManager was already closed. |
| */ |
| protected boolean close() { |
| if (em == null) |
| return false; |
| |
| rollback(); |
| |
| if (!em.isOpen()) |
| return false; |
| |
| em.close(); |
| return !em.isOpen(); |
| } |
| |
| /** |
| * Delete all of the instances. |
| * |
| * If no transaction is running, then one will be started and committed. |
| * Otherwise, the operation will take place in the current transaction. |
| */ |
| protected void remove(Object... obs) { |
| boolean tx = begin(); |
| for (Object ob : obs) |
| em.remove(ob); |
| if (tx) |
| commit(); |
| } |
| |
| /** |
| * Persist all of the instances. |
| * |
| * If no transaction is running, then one will be started and committed. |
| * Otherwise, the operation will take place in the current transaction. |
| */ |
| protected void persist(Object... obs) { |
| boolean tx = begin(); |
| for (Object ob : obs) |
| em.persist(ob); |
| if (tx) |
| commit(); |
| } |
| |
| /** |
| * Creates a query in the current EntityManager with the specified string. |
| */ |
| protected OpenJPAQuery query(String str) { |
| return em.createQuery(str); |
| } |
| |
| /** |
| * Create a query against the specified class, which will be aliased |
| * as "x". For example, query(Person.class, "where x.age = 21") will |
| * create the query "select x from Person x where x.age = 21". |
| * |
| * @param c the class to query against |
| * @param str the query suffix |
| * @param params the parameters, if any |
| * @return the Query object |
| */ |
| protected OpenJPAQuery query(Class c, String str, Object... params) { |
| String query = "select x from " + entityName(emf, c) + " x " |
| + (str == null ? "" : str); |
| OpenJPAQuery q = em.createQuery(query); |
| for (int i = 0; params != null && i < params.length; i++) |
| q.setParameter(i + 1, params[i]); |
| return q; |
| } |
| |
| /** |
| * Returns a list of all instances of the specific class in the database. |
| * |
| * @param c the class to find |
| * @param q the query string suffix to use |
| * @param params the positional parameter list value |
| * |
| * @see #query(java.lang.Class,java.lang.String) |
| */ |
| protected <E> List<E> find(Class<E> c, String q, Object... params) { |
| return Collections.checkedList(query(c, q, params).getResultList(), c); |
| } |
| |
| /** |
| * Returns a list of all instances of the specific class in the database. |
| */ |
| protected <E> List<E> find(Class<E> c) { |
| return find(c, null); |
| } |
| } |