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‎src/test/java/org/apache/ibatis/submitted/parent_childs/Child.java

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package org.apache.ibatis.submitted.parent_childs;
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public class Child {
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private int id;
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private String name;
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private String surName;
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private int age;
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public int getId() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getSurName() {
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return surName;
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}
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public void setSurName(String surName) {
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this.surName = surName;
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}
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public int getAge() {
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return age;
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}
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public void setAge(int age) {
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this.age = age;
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}
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}

‎src/test/java/org/apache/ibatis/submitted/parent_childs/CreateDB.sql

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--
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-- Copyright 2009-2012 The MyBatis Team
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--
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-- Licensed under the Apache License, Version 2.0 (the "License");
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-- you may not use this file except in compliance with the License.
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-- You may obtain a copy of the License at
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--
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-- http://www.apache.org/licenses/LICENSE-2.0
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--
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-- Unless required by applicable law or agreed to in writing, software
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-- distributed under the License is distributed on an "AS IS" BASIS,
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-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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-- See the License for the specific language governing permissions and
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-- limitations under the License.
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--
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drop table users if exists;
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create table Parent (
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id int,
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Name varchar(20),
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SurName varchar(20)
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);
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create table Child (
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id int,
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Name varchar(20),
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SurName varchar(20),
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Age int,
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ParentId varchar(20)
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);
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insert into Parent values (1, 'Jose', 'Garcia');
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insert into Parent values (2, 'Juan', 'Perez');
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insert into Child values (1, 'Ana', 'Garcia', 1, 1);
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insert into Child values (2, 'Rosa', 'Garcia', 4, 1);
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‎src/test/java/org/apache/ibatis/submitted/parent_childs/Mapper.java

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/*
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* Copyright 2009-2012 The MyBatis Team
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.ibatis.submitted.parent_childs;
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import java.util.List;
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public interface Mapper {
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List<Parent> getParents();
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}

‎src/test/java/org/apache/ibatis/submitted/parent_childs/Mapper.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Copyright 2009-2013 The MyBatis Team
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<!DOCTYPE mapper
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PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
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"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="org.apache.ibatis.submitted.parent_childs.Mapper">
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<resultMap id="ParentMap" type="org.apache.ibatis.submitted.parent_childs.Parent">
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<id column="p_Id" property="id" />
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<id column="p_Name" property="name" />
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<id column="p_SurName" property="surName" />
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<collection property="childs" resultMap="ChildMap" />
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</resultMap>
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<resultMap id="ChildMap" type="org.apache.ibatis.submitted.parent_childs.Child">
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<id column="c_id" property="id" />
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<id column="c_Name" property="name" />
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<id column="c_SurName" property="surName" />
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<id column="c_Age" property="age" />
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</resultMap>
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<select id="getParents" resultMap="ParentMap">
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select
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p.Id as p_Id,
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p.Name as p_Name,
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p.SurName as p_SurName,
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c.Id as c_Id,
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c.Name as c_Name,
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c.SurName as c_SurName,
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c.Age as c_Age
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from Parent p
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left outer join Child c on p.Id = c.ParentId
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</select>
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</mapper>

‎src/test/java/org/apache/ibatis/submitted/parent_childs/Parent.java

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package org.apache.ibatis.submitted.parent_childs;
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import java.util.List;
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public class Parent {
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private int id;
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private String name;
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private String surName;
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private List<Child> childs;
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public int getId() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getSurName() {
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return surName;
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}
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public void setSurName(String surName) {
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this.surName = surName;
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}
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public List<Child> getChilds() {
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return childs;
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}
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public void setChilds(List<Child> childs) {
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this.childs = childs;
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}
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}

‎src/test/java/org/apache/ibatis/submitted/parent_childs/ParentChildTest.java

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/*
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* Copyright 2009-2012 The MyBatis Team
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.ibatis.submitted.parent_childs;
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import java.io.Reader;
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import java.sql.Connection;
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import java.util.List;
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import org.apache.ibatis.io.Resources;
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import org.apache.ibatis.jdbc.ScriptRunner;
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import org.apache.ibatis.session.SqlSession;
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import org.apache.ibatis.session.SqlSessionFactory;
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import org.apache.ibatis.session.SqlSessionFactoryBuilder;
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import org.junit.Assert;
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import org.junit.BeforeClass;
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import org.junit.Test;
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public class ParentChildTest {
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private static SqlSessionFactory sqlSessionFactory;
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@BeforeClass
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public static void setUp() throws Exception {
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// create a SqlSessionFactory
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Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/parent_childs/mybatis-config.xml");
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sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
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reader.close();
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// populate in-memory database
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SqlSession session = sqlSessionFactory.openSession();
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Connection conn = session.getConnection();
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reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/parent_childs/CreateDB.sql");
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ScriptRunner runner = new ScriptRunner(conn);
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runner.setLogWriter(null);
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runner.runScript(reader);
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reader.close();
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session.close();
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}
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@Test
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public void shouldGetAUser() {
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SqlSession sqlSession = sqlSessionFactory.openSession();
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try {
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Mapper mapper = sqlSession.getMapper(Mapper.class);
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List<Parent> parents = mapper.getParents();
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Assert.assertEquals(2, parents.size());
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Parent fistParent = parents.get(0);
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Assert.assertEquals("Jose", fistParent.getName());
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Assert.assertEquals(2, fistParent.getChilds().size());
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Parent secondParent = parents.get(1);
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Assert.assertEquals("Juan", secondParent.getName());
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Assert.assertEquals(0, secondParent.getChilds().size());
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} finally {
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sqlSession.close();
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}
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}
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}

‎src/test/java/org/apache/ibatis/submitted/parent_childs/User.java

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/*
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* Copyright 2009-2012 The MyBatis Team
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.ibatis.submitted.parent_childs;
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public class User {
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private Integer id;
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private String name;
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public Integer getId() {
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return id;
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}
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public void setId(Integer id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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}

‎src/test/java/org/apache/ibatis/submitted/parent_childs/mybatis-config.xml

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<?xml version="1.0" encoding="UTF-8" ?>
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<!--
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Copyright 2009-2012 The MyBatis Team
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<!DOCTYPE configuration
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PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
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"http://mybatis.org/dtd/mybatis-3-config.dtd">
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<configuration>
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<environments default="development">
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<environment id="development">
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<transactionManager type="JDBC">
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<property name="" value="" />
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</transactionManager>
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<dataSource type="UNPOOLED">
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<property name="driver" value="org.hsqldb.jdbcDriver" />
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<property name="url" value="jdbc:hsqldb:mem:parent_childs" />
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<property name="username" value="sa" />
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</dataSource>
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</environment>
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</environments>
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<mappers>
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<mapper resource="org/apache/ibatis/submitted/parent_childs/Mapper.xml" />
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</mappers>
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</configuration>

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