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Work on DAO example. Table per class strategy. Persist fixes.

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This commit is contained in:
Ilkka Seppala 2015-04-13 22:08:01 +03:00
parent 82eebeaee0
commit 08c3145c47
6 changed files with 82 additions and 23 deletions
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8
dao/src/main/java/com/iluwatar/App.java
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@ -13,8 +13,10 @@ public class App {
public static void persistData(WizardDao dao) {
Spell spell = new Spell("Fireball");
Spellbook spellbook = new Spellbook("Book of fire");
spell.setSpellbook(spellbook);
spellbook.getSpells().add(spell);
Wizard wizard = new Wizard("Jugga");
spellbook.setWizard(wizard);
wizard.getSpellbooks().add(spellbook);
dao.persist(wizard);
}
@ -23,6 +25,12 @@ public class App {
List<Wizard> wizards = dao.findAll();
for (Wizard w: wizards) {
System.out.println(w);
for (Spellbook spellbook: w.getSpellbooks()) {
System.out.println(spellbook);
for (Spell spell: spellbook.getSpells()) {
System.out.println(spell);
}
}
}
}
}

23
dao/src/main/java/com/iluwatar/BaseEntity.java
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@ -1,26 +1,13 @@
package com.iluwatar;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.MappedSuperclass;
import javax.persistence.Version;
@Entity
@MappedSuperclass
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
public class BaseEntity {
@Id
@GeneratedValue
@Column(name = "ID")
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Version
private Long version;

2
dao/src/main/java/com/iluwatar/DaoBase.java
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@ -27,7 +27,7 @@ public abstract class DaoBase<E extends BaseEntity> {
.setProperty("hibernate.connection.url", "jdbc:h2:mem:test;DB_CLOSE_DELAY=-1")
.setProperty("hibernate.current_session_context_class", "thread")
.setProperty("hibernate.show_sql", "true")
.setProperty("hibernate.hbm2ddl.auto", "create")
.setProperty("hibernate.hbm2ddl.auto", "create-drop")
.buildSessionFactory();
return sessionFactory;
}

28
dao/src/main/java/com/iluwatar/Spell.java
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@ -1,6 +1,11 @@
package com.iluwatar;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@ -19,8 +24,21 @@ public class Spell extends BaseEntity {
this.name = name;
}
@Id
@GeneratedValue
@Column(name = "SPELL_ID")
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@ManyToOne
@JoinColumn(name="SPELLBOOK_ID_FK", referencedColumnName="ID")
@JoinColumn(name="SPELLBOOK_ID_FK", referencedColumnName="SPELLBOOK_ID")
private Spellbook spellbook;
public String getName() {
@ -31,6 +49,14 @@ public class Spell extends BaseEntity {
this.name = name;
}
public Spellbook getSpellbook() {
return spellbook;
}
public void setSpellbook(Spellbook spellbook) {
this.spellbook = spellbook;
}
@Override
public String toString() {
return name;

23
dao/src/main/java/com/iluwatar/Spellbook.java
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@ -4,7 +4,13 @@ import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
@ -23,13 +29,26 @@ public class Spellbook extends BaseEntity {
this.name = name;
}
@Id
@GeneratedValue
@Column(name = "SPELLBOOK_ID")
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
private String name;
@ManyToOne
@JoinColumn(name="WIZARD_ID_FK", referencedColumnName="ID")
@JoinColumn(name="WIZARD_ID_FK", referencedColumnName="WIZARD_ID")
private Wizard wizard;
@OneToMany(mappedBy = "spellbook", orphanRemoval = true, cascade = CascadeType.ALL)
@OneToMany(mappedBy = "spellbook", orphanRemoval = true, fetch = FetchType.EAGER, cascade = CascadeType.ALL)
private Set<Spell> spells;
public String getName() {

21
dao/src/main/java/com/iluwatar/Wizard.java
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@ -4,7 +4,13 @@ import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@ -20,10 +26,23 @@ public class Wizard extends BaseEntity {
this();
this.name = name;
}
@Id
@GeneratedValue
@Column(name = "WIZARD_ID")
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
private String name;
@OneToMany(mappedBy = "wizard", orphanRemoval = true, cascade = CascadeType.ALL)
@OneToMany(mappedBy = "wizard", orphanRemoval = true, fetch = FetchType.EAGER, cascade = CascadeType.ALL)
private Set<Spellbook> spellbooks;
public String getFirstName() {