CommonPropertyDeferLoadError.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.deferload_common_property;

import static org.junit.Assert.*;

import java.io.Reader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.ArrayList;
import java.util.List;

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

public class CommonPropertyDeferLoadError {

    private static SqlSessionFactory sqlSessionFactory;
    private static SqlSessionFactory lazyLoadSqlSessionFactory;

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

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

            Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/deferload_common_property/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/deferload_common_property/ibatisConfig.xml");
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
            reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/deferload_common_property/lazyLoadIbatisConfig.xml");
            lazyLoadSqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
            reader.close();
        } finally {
            if (conn != null) {
                conn.close();
            }
        }
    }

    @Test
    public void testDeferLoadAfterResultHandler() {
        SqlSession sqlSession = sqlSessionFactory.openSession();
        try {
            class MyResultHandler implements ResultHandler {
                List<Child> children = new ArrayList<Child>();
                public void handleResult(ResultContext context) {
                    Child child = (Child)context.getResultObject();
                    children.add(child);
                }
            };
            MyResultHandler myResultHandler = new MyResultHandler();
            sqlSession.select("org.apache.ibatis.submitted.deferload_common_property.ChildMapper.selectAll", myResultHandler);
            for (Child child: myResultHandler.children) {
                assertNotNull(child.getFather());
            }
        } finally {
            sqlSession.close();
        }
    }

    @Test
    public void testDeferLoadDuringResultHandler() {
        SqlSession sqlSession = sqlSessionFactory.openSession();
        try {
            class MyResultHandler implements ResultHandler {
                public void handleResult(ResultContext context) {
                    Child child = (Child)context.getResultObject();
                    assertNotNull(child.getFather());
                }
            };
            sqlSession.select("org.apache.ibatis.submitted.deferload_common_property.ChildMapper.selectAll", new MyResultHandler());
        } finally {
            sqlSession.close();
        }
    }

    @Test
    public void testDeferLoadAfterResultHandlerWithLazyLoad() {
        SqlSession sqlSession = lazyLoadSqlSessionFactory.openSession();
        try {
            class MyResultHandler implements ResultHandler {
                List<Child> children = new ArrayList<Child>();
                public void handleResult(ResultContext context) {
                    Child child = (Child)context.getResultObject();
                    children.add(child);
                }
            };
            MyResultHandler myResultHandler = new MyResultHandler();
            sqlSession.select("org.apache.ibatis.submitted.deferload_common_property.ChildMapper.selectAll", myResultHandler);
            for (Child child: myResultHandler.children) {
                assertNotNull(child.getFather());
            }
        } finally {
            sqlSession.close();
        }
    }

    @Test
    public void testDeferLoadDuringResultHandlerWithLazyLoad() {
        SqlSession sqlSession = lazyLoadSqlSessionFactory.openSession();
        try {
            class MyResultHandler implements ResultHandler {
                public void handleResult(ResultContext context) {
                    Child child = (Child)context.getResultObject();
                    assertNotNull(child.getFather());
                }
            };
            sqlSession.select("org.apache.ibatis.submitted.deferload_common_property.ChildMapper.selectAll", new MyResultHandler());
        } finally {
            sqlSession.close();
        }
    }
}