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iluwatariluwatar
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Added DAO pattern.
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9 files changed

+253
-1
lines changed

9 files changed

+253
-1
lines changed

‎dao/pom.xml‎

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<?xml version="1.0"?>
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<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>com.iluwatar</groupId>
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<artifactId>java-design-patterns</artifactId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<artifactId>dao</artifactId>
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<dependencies>
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<dependency>
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<groupId>org.hibernate</groupId>
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<artifactId>hibernate-core</artifactId>
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</dependency>
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<dependency>
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<groupId>com.h2database</groupId>
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<artifactId>h2</artifactId>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

‎dao/src/main/java/com/iluwatar/App.java‎

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package com.iluwatar;
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import java.util.List;
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import org.hibernate.Query;
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import org.hibernate.Session;
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import org.hibernate.SessionFactory;
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import org.hibernate.cfg.Configuration;
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public class App
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{
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public static void main( String[] args ) {
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SessionFactory sessionFactory = new Configuration()
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.addAnnotatedClass(Wizard.class)
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.addAnnotatedClass(Spellbook.class)
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.addAnnotatedClass(Spell.class)
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.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect")
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.setProperty("hibernate.connection.url", "jdbc:h2:mem:test;DB_CLOSE_DELAY=-1")
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.setProperty("hibernate.current_session_context_class", "thread")
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.setProperty("hibernate.show_sql", "true")
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.setProperty("hibernate.hbm2ddl.auto", "create")
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.buildSessionFactory();
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Session session = sessionFactory.getCurrentSession();
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session.beginTransaction();
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Wizard wizard = new Wizard();
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wizard.setFirstName("Jugga");
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Spellbook spellbook = new Spellbook();
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Spell spell = new Spell();
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spellbook.getSpells().add(spell);
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wizard.getSpellbooks().add(spellbook);
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session.persist(wizard);
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Query query = session.createQuery("from Wizard");
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List<?> list = query.list();
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Wizard p1 = (Wizard) list.get(0);
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System.out.println(String.format("id=%d firstName=%s", p1.getId(), p1.getFirstName()));
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session.getTransaction().commit();
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}
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}

‎dao/src/main/java/com/iluwatar/BaseEntity.java‎

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package com.iluwatar;
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import javax.persistence.Column;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.Id;
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import javax.persistence.Version;
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@Entity
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public class BaseEntity {
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@Id
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@GeneratedValue
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@Column(name = "ID")
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private Long id;
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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@Version
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private Long version;
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}

‎dao/src/main/java/com/iluwatar/DaoBase.java‎

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package com.iluwatar;
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public abstract class DaoBase<E extends BaseEntity> {
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E find(Long id) {
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}
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void persist(E e) {
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}
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E merge(E e) {
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}
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void remove(E e) {
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}
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List<E> findAll() {
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}
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}

‎dao/src/main/java/com/iluwatar/Spell.java‎

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package com.iluwatar;
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import javax.persistence.Entity;
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import javax.persistence.JoinColumn;
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import javax.persistence.ManyToOne;
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import javax.persistence.Table;
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@Entity
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@Table(name="SPELL")
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public class Spell extends BaseEntity {
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private String name;
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@ManyToOne
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@JoinColumn(name="SPELLBOOK_ID_FK", referencedColumnName="ID")
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private Spellbook spellbook;
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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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}

‎dao/src/main/java/com/iluwatar/Spellbook.java‎

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package com.iluwatar;
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import java.util.HashSet;
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import java.util.Set;
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import javax.persistence.CascadeType;
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import javax.persistence.Entity;
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import javax.persistence.JoinColumn;
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import javax.persistence.ManyToOne;
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import javax.persistence.OneToMany;
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import javax.persistence.Table;
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@Entity
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@Table(name="SPELLBOOK")
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public class Spellbook extends BaseEntity {
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public Spellbook() {
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spells = new HashSet<Spell>();
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}
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private String name;
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@ManyToOne
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@JoinColumn(name="WIZARD_ID_FK", referencedColumnName="ID")
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private Wizard wizard;
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@OneToMany(mappedBy = "spellbook", orphanRemoval = true, cascade = CascadeType.ALL)
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private Set<Spell> spells;
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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 Wizard getWizard() {
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return wizard;
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}
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public void setWizard(Wizard wizard) {
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this.wizard = wizard;
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}
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public Set<Spell> getSpells() {
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return spells;
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}
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public void setSpells(Set<Spell> spells) {
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this.spells = spells;
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}
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}

‎dao/src/main/java/com/iluwatar/Wizard.java‎

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package com.iluwatar;
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import java.util.HashSet;
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import java.util.Set;
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import javax.persistence.CascadeType;
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import javax.persistence.Entity;
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import javax.persistence.OneToMany;
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import javax.persistence.Table;
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@Entity
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@Table(name="WIZARD")
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public class Wizard extends BaseEntity {
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public Wizard() {
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spellbooks = new HashSet<Spellbook>();
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}
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private String firstName;
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@OneToMany(mappedBy = "wizard", orphanRemoval = true, cascade = CascadeType.ALL)
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private Set<Spellbook> spellbooks;
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public String getFirstName() {
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return firstName;
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}
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public void setFirstName(String firstName) {
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this.firstName = firstName;
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}
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public Set<Spellbook> getSpellbooks() {
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return spellbooks;
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}
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public void setSpellbooks(Set<Spellbook> spellbooks) {
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this.spellbooks = spellbooks;
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}
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}

‎dao/src/test/java/com/iluwatar/AppTest.java‎

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package com.iluwatar;
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public class AppTest {
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}

‎pom.xml‎

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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<hibernate.version>5.0.0.Beta1</hibernate.version>
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<h2.version>1.4.187</h2.version>
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<junit.version>4.12</junit.version>
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</properties>
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<modules>
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<module>abstract-factory</module>
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<module>intercepting-filter</module>
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<module>poison-pill</module>
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<module>lazy-loading</module>
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<module>dao</module>
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</modules>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.hibernate</groupId>
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<artifactId>hibernate-core</artifactId>
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<version>${hibernate.version}</version>
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</dependency>
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<dependency>
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<groupId>com.h2database</groupId>
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<artifactId>h2</artifactId>
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<version>${h2.version}</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.11</version>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>

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