CglibNPELazyTest.java

/*
 *    Copyright 2009-2012 the original author or authors.
 *
 *    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 org.apache.ibatis.submitted.cglib_lazy_error;

import java.io.Reader;
import java.sql.Connection;
import java.sql.DriverManager;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.jdbc.ScriptRunner;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;

public class CglibNPELazyTest {

  private static SqlSessionFactory sqlSessionFactory;

  @BeforeClass
  public static void initDatabase() throws Exception {
    Connection conn = null;

    try {
      Class.forName("org.hsqldb.jdbcDriver");
      conn = DriverManager.getConnection("jdbc:hsqldb:mem:cglib_lazy_error", "sa",
          "");

      Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/cglib_lazy_error/CreateDB.sql");

      ScriptRunner runner = new ScriptRunner(conn);
      runner.setLogWriter(null);
      runner.setErrorLogWriter(null);
      runner.runScript(reader);
      conn.commit();
      reader.close();

      reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/cglib_lazy_error/ibatisConfigLazy.xml");
      sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
      sqlSessionFactory.getConfiguration().setLazyLoadingEnabled(true);
      sqlSessionFactory.getConfiguration().setAggressiveLazyLoading(false);
      reader.close();
    } finally {
      if (conn != null) {
        conn.close();
      }
    }
  }

  @Test
  public void testNoParent() {
    SqlSession sqlSession = sqlSessionFactory.openSession();
    PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
    Person person = personMapper.selectById(1);
    Assert.assertNotNull("Persons must not be null", person);
    Person parent = person.getParent();
    Assert.assertNull("Parent must be null", parent);
    sqlSession.close();
  }

  @Test
  public void testAncestorSelf() {
    SqlSession sqlSession = sqlSessionFactory.openSession();
    PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
    Person person = personMapper.selectById(1);
    Assert.assertNotNull("Persons must not be null", person);
    Person ancestor = person.getAncestor();
    Assert.assertEquals("Ancestor must be John Smith sr.", person, ancestor);
    sqlSession.close();
  }

  @Test
  public void testAncestorAfterQueryingParents() {
    SqlSession sqlSession = sqlSessionFactory.openSession();
    PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
    Person expectedAncestor = personMapper.selectById(1);
    Person person = personMapper.selectById(3);
    // Load ancestor indirectly.
    Assert.assertNotNull("Persons must not be null", person);
    Assert.assertNotNull("Parent must not be null", person.getParent());
    Assert.assertNotNull("Grandparent must not be null", person.getParent().getParent());
    Assert.assertEquals("Ancestor must be John Smith sr.", expectedAncestor, person.getAncestor());
    sqlSession.close();
  }

  @Test
  public void testGrandParent() {
    SqlSession sqlSession = sqlSessionFactory.openSession();
    PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
    Person expectedParent = personMapper.selectById(2);
    Person expectedGrandParent = personMapper.selectById(1);
    Person person = personMapper.selectById(3);
    Assert.assertNotNull("Persons must not be null", person);
    final Person actualParent = person.getParent();
    final Person actualGrandParent = person.getParent().getParent();
    Assert.assertEquals(expectedParent, actualParent);
    Assert.assertEquals(expectedGrandParent, actualGrandParent);
    sqlSession.close();
  }

  @Test
  public void testAncestor() {
    SqlSession sqlSession = sqlSessionFactory.openSession();
    PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
    Person expectedAncestor = personMapper.selectById(1);
    Person person = personMapper.selectById(3);
    Assert.assertNotNull("Persons must not be null", person);
    final Person actualAncestor = person.getAncestor();
    Assert.assertEquals(expectedAncestor, actualAncestor);
    sqlSession.close();
  }

}