Merge pull request #8012 from fanatixan/bael-3089

BAEL-3089 - created examples for @SecondaryTable article

persistence-modules/java-jpa-2/src/main/java/com/baeldung/jpa/multipletables/multipleentities/AllergensAsEntity.java

@@ -0,0 +1,73 @@
+package com.baeldung.jpa.multipletables.multipleentities;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.OneToOne;
+import javax.persistence.PrimaryKeyJoinColumn;
+import javax.persistence.Table;
+
+import com.baeldung.jpa.multipletables.secondarytable.MealAsSingleEntity;
+
+@Entity
+@Table(name = "allergens")
+public class AllergensAsEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "meal_id")
+    private Long mealId;
+
+    @OneToOne
+    @PrimaryKeyJoinColumn(name = "meal_id")
+    private MealAsSingleEntity meal;
+
+    @Column(name = "peanuts")
+    private boolean peanuts;
+
+    @Column(name = "celery")
+    private boolean celery;
+
+    @Column(name = "sesame_seeds")
+    private boolean sesameSeeds;
+
+    public MealAsSingleEntity getMeal() {
+        return meal;
+    }
+
+    public void setMeal(MealAsSingleEntity meal) {
+        this.meal = meal;
+    }
+
+    public boolean isPeanuts() {
+        return peanuts;
+    }
+
+    public void setPeanuts(boolean peanuts) {
+        this.peanuts = peanuts;
+    }
+
+    public boolean isCelery() {
+        return celery;
+    }
+
+    public void setCelery(boolean celery) {
+        this.celery = celery;
+    }
+
+    public boolean isSesameSeeds() {
+        return sesameSeeds;
+    }
+
+    public void setSesameSeeds(boolean sesameSeeds) {
+        this.sesameSeeds = sesameSeeds;
+    }
+
+    @Override
+    public String toString() {
+        return "AllergensAsEntity [peanuts=" + peanuts + ", celery=" + celery + ", sesameSeeds=" + sesameSeeds + "]";
+    }
+
+}

persistence-modules/java-jpa-2/src/main/java/com/baeldung/jpa/multipletables/multipleentities/MealWithMultipleEntities.java

@@ -0,0 +1,75 @@
+package com.baeldung.jpa.multipletables.multipleentities;
+
+import java.math.BigDecimal;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.OneToOne;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "meal")
+public class MealWithMultipleEntities {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Long id;
+
+    @Column(name = "name")
+    private String name;
+
+    @Column(name = "description")
+    private String description;
+
+    @Column(name = "price")
+    private BigDecimal price;
+
+    @OneToOne(mappedBy = "meal")
+    private AllergensAsEntity allergens;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public AllergensAsEntity getAllergens() {
+        return allergens;
+    }
+
+    public void setAllergens(AllergensAsEntity allergens) {
+        this.allergens = allergens;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    @Override
+    public String toString() {
+        return "MealWithMultipleEntities [id=" + id + ", name=" + name + ", description=" + description + ", price=" + price + ", allergens=" + allergens + "]";
+    }
+
+}

persistence-modules/java-jpa-2/src/main/java/com/baeldung/jpa/multipletables/secondarytable/MealAsSingleEntity.java

@@ -0,0 +1,99 @@
+package com.baeldung.jpa.multipletables.secondarytable;
+
+import java.math.BigDecimal;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.PrimaryKeyJoinColumn;
+import javax.persistence.SecondaryTable;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "meal")
+@SecondaryTable(name = "allergens", pkJoinColumns = @PrimaryKeyJoinColumn(name = "meal_id"))
+public class MealAsSingleEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Long id;
+
+    @Column(name = "name")
+    private String name;
+
+    @Column(name = "description")
+    private String description;
+
+    @Column(name = "price")
+    private BigDecimal price;
+
+    @Column(name = "peanuts", table = "allergens")
+    private boolean peanuts;
+
+    @Column(name = "celery", table = "allergens")
+    private boolean celery;
+
+    @Column(name = "sesame_seeds", table = "allergens")
+    private boolean sesameSeeds;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public boolean isPeanuts() {
+        return peanuts;
+    }
+
+    public void setPeanuts(boolean peanuts) {
+        this.peanuts = peanuts;
+    }
+
+    public boolean isCelery() {
+        return celery;
+    }
+
+    public void setCelery(boolean celery) {
+        this.celery = celery;
+    }
+
+    public boolean isSesameSeeds() {
+        return sesameSeeds;
+    }
+
+    public void setSesameSeeds(boolean sesameSeeds) {
+        this.sesameSeeds = sesameSeeds;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    @Override
+    public String toString() {
+        return "MealAsSingleEntity [id=" + id + ", name=" + name + ", description=" + description + ", price=" + price + ", peanuts=" + peanuts + ", celery=" + celery + ", sesameSeeds=" + sesameSeeds + "]";
+    }
+
+}

persistence-modules/java-jpa-2/src/main/java/com/baeldung/jpa/multipletables/secondarytable/embeddable/AllergensAsEmbeddable.java

@@ -0,0 +1,47 @@
+package com.baeldung.jpa.multipletables.secondarytable.embeddable;
+
+import javax.persistence.Column;
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class AllergensAsEmbeddable {
+
+    @Column(name = "peanuts", table = "allergens")
+    private boolean peanuts;
+
+    @Column(name = "celery", table = "allergens")
+    private boolean celery;
+
+    @Column(name = "sesame_seeds", table = "allergens")
+    private boolean sesameSeeds;
+
+    public boolean isPeanuts() {
+        return peanuts;
+    }
+
+    public void setPeanuts(boolean peanuts) {
+        this.peanuts = peanuts;
+    }
+
+    public boolean isCelery() {
+        return celery;
+    }
+
+    public void setCelery(boolean celery) {
+        this.celery = celery;
+    }
+
+    public boolean isSesameSeeds() {
+        return sesameSeeds;
+    }
+
+    public void setSesameSeeds(boolean sesameSeeds) {
+        this.sesameSeeds = sesameSeeds;
+    }
+
+    @Override
+    public String toString() {
+        return "AllergensAsEmbeddable [peanuts=" + peanuts + ", celery=" + celery + ", sesameSeeds=" + sesameSeeds + "]";
+    }
+
+}

persistence-modules/java-jpa-2/src/main/java/com/baeldung/jpa/multipletables/secondarytable/embeddable/MealWithEmbeddedAllergens.java

@@ -0,0 +1,78 @@
+package com.baeldung.jpa.multipletables.secondarytable.embeddable;
+
+import java.math.BigDecimal;
+
+import javax.persistence.Column;
+import javax.persistence.Embedded;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.PrimaryKeyJoinColumn;
+import javax.persistence.SecondaryTable;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "meal")
+@SecondaryTable(name = "allergens", pkJoinColumns = @PrimaryKeyJoinColumn(name = "meal_id"))
+public class MealWithEmbeddedAllergens {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Long id;
+
+    @Column(name = "name")
+    private String name;
+
+    @Column(name = "description")
+    private String description;
+
+    @Column(name = "price")
+    private BigDecimal price;
+
+    @Embedded
+    private AllergensAsEmbeddable allergens;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public AllergensAsEmbeddable getAllergens() {
+        return allergens;
+    }
+
+    public void setAllergens(AllergensAsEmbeddable allergens) {
+        this.allergens = allergens;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    @Override
+    public String toString() {
+        return "MealWithEmbeddedAllergens [id=" + id + ", name=" + name + ", description=" + description + ", price=" + price + ", allergens=" + allergens + "]";
+    }
+
+}

persistence-modules/java-jpa-2/src/main/resources/META-INF/persistence.xml

@@ -135,4 +135,32 @@
 		</properties>
 	</persistence-unit>
 
+    <persistence-unit name="jpa-h2-multipltables">
+        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
+        <class>com.baeldung.jpa.multipletables.multipleentities.MealWithMultipleEntities</class>
+        <class>com.baeldung.jpa.multipletables.multipleentities.AllergensAsEntity</class>
+        
+        <class>com.baeldung.jpa.multipletables.secondarytable.MealAsSingleEntity</class>
+        
+        <class>com.baeldung.jpa.multipletables.secondarytable.embeddable.MealWithEmbeddedAllergens</class>
+        <class>com.baeldung.jpa.multipletables.secondarytable.embeddable.AllergensAsEmbeddable</class>
+
+        <exclude-unlisted-classes>true</exclude-unlisted-classes>
+        <properties>
+            <property name="javax.persistence.jdbc.driver"
+                      value="org.h2.Driver" />
+            <property name="javax.persistence.jdbc.url"
+                      value="jdbc:h2:mem:test" />
+            <property name="javax.persistence.jdbc.user" value="sa" />
+            <property name="javax.persistence.jdbc.password" value="" />
+            <property name="hibernate.dialect"
+                      value="org.hibernate.dialect.H2Dialect" />
+            <property name="hibernate.hbm2ddl.auto" value="create" />
+            <property name="hibernate.hbm2ddl.import_files" value="multipletables.sql" />
+            <property name="show_sql" value="true" />
+            <property name="hibernate.temp.use_jdbc_metadata_defaults"
+                      value="false" />
+        </properties>
+    </persistence-unit>
+
 </persistence>

persistence-modules/java-jpa-2/src/test/java/com/baeldung/jpa/multipletables/MultipleTablesIntegrationTest.java

@@ -0,0 +1,79 @@
+package com.baeldung.jpa.multipletables;
+
+import static org.assertj.core.api.Assertions.*;
+
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.Persistence;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import com.baeldung.jpa.multipletables.multipleentities.MealWithMultipleEntities;
+import com.baeldung.jpa.multipletables.secondarytable.MealAsSingleEntity;
+import com.baeldung.jpa.multipletables.secondarytable.embeddable.MealWithEmbeddedAllergens;
+
+public class MultipleTablesIntegrationTest {
+
+    private static EntityManagerFactory emf;
+    private static EntityManager em;
+
+    @BeforeClass
+    public static void setup() {
+        emf = Persistence.createEntityManagerFactory("jpa-h2-multipltables");
+        em = emf.createEntityManager();
+    }
+
+    @Test
+    public void entityManager_shouldLoadMealAsSingleEntity() {
+        // given
+        
+        // when
+        MealAsSingleEntity meal = em.find(MealAsSingleEntity.class, 1L);
+        
+        // then
+        assertThat(meal).isNotNull();
+        assertThat(meal.getId()).isEqualTo(1L);
+        assertThat(meal.isPeanuts()).isFalse();
+        assertThat(meal.isCelery()).isTrue();
+    }
+
+    @Test
+    public void entityManager_shouldLoadMealWithEmbeddedAllergens() {
+        // given
+        
+        // when
+        MealWithEmbeddedAllergens meal = em.find(MealWithEmbeddedAllergens.class, 1L);
+        
+        // then
+        assertThat(meal).isNotNull();
+        assertThat(meal.getId()).isEqualTo(1L);
+        assertThat(meal.getAllergens()).isNotNull();
+        assertThat(meal.getAllergens().isPeanuts()).isFalse();
+        assertThat(meal.getAllergens().isCelery()).isTrue();
+    }
+
+    @Test
+    public void entityManager_shouldLoadMealWithAllergensEntity() {
+        // given
+        
+        // when
+        MealWithMultipleEntities meal = em.find(MealWithMultipleEntities.class, 1L);
+        
+        // then
+        assertThat(meal).isNotNull();
+        assertThat(meal.getId()).isEqualTo(1L);
+        assertThat(meal.getAllergens()).isNotNull();
+        assertThat(meal.getAllergens().isPeanuts()).isFalse();
+        assertThat(meal.getAllergens().isCelery()).isTrue();
+    }
+
+    @AfterClass
+    public static void teardown() {
+        if (emf != null) {
+            emf.close();
+        }
+    }
+
+}

persistence-modules/java-jpa-2/src/test/resources/multipletables.sql

@@ -0,0 +1,8 @@
+drop table if exists allergens;
+drop table if exists meal;
+
+create table meal (id bigint auto_increment, name varchar(255) not null, description varchar(255) not null, price decimal(19, 2) not null, primary key (id));
+create table allergens (meal_id bigint auto_increment, peanuts number(1) not null, celery number(1) not null, sesame_seeds number(1) not null, primary key (meal_id));
+
+insert into meal (id, name, description, price) values (1, 'Pizza', 'Delicious', 5);
+insert into allergens (meal_id, peanuts, celery, sesame_seeds) values (1, 0, 1, 0);