diff --git a/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/model/Characteristic.java b/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/model/Characteristic.java new file mode 100644 index 0000000000..ae20375572 --- /dev/null +++ b/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/model/Characteristic.java @@ -0,0 +1,43 @@ +package com.baeldung.entitygraph.model; + +import javax.persistence.Entity; +import javax.persistence.FetchType; +import javax.persistence.Id; +import javax.persistence.JoinColumn; +import javax.persistence.ManyToOne; + +@Entity +public class Characteristic { + + @Id + private Long id; + private String type; + + @ManyToOne(fetch = FetchType.LAZY) + @JoinColumn + private Item item; + + public Long getId() { + return id; + } + + public void setId(Long id) { + this.id = id; + } + + public String getType() { + return type; + } + + public void setType(String type) { + this.type = type; + } + + public Item getItem() { + return item; + } + + public void setItem(Item item) { + this.item = item; + } +} diff --git a/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/model/Item.java b/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/model/Item.java new file mode 100644 index 0000000000..e90a22ef62 --- /dev/null +++ b/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/model/Item.java @@ -0,0 +1,48 @@ +package com.baeldung.entitygraph.model; + +import java.util.ArrayList; +import java.util.List; + +import javax.persistence.Entity; +import javax.persistence.Id; +import javax.persistence.NamedAttributeNode; +import javax.persistence.NamedEntityGraph; +import javax.persistence.OneToMany; + +@Entity +@NamedEntityGraph(name = "Item.characteristics", + attributeNodes = @NamedAttributeNode("characteristics") +) +public class Item { + + @Id + private Long id; + private String name; + + @OneToMany(mappedBy = "item") + private List characteristics = new ArrayList<>(); + + public Long getId() { + return id; + } + + public void setId(Long id) { + this.id = id; + } + + public String getName() { + return name; + } + + public void setName(String name) { + this.name = name; + } + + public List getCharacteristics() { + return characteristics; + } + + public void setCharacteristics(List characteristics) { + this.characteristics = characteristics; + } +} diff --git a/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/repository/CharacteristicsRepository.java b/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/repository/CharacteristicsRepository.java new file mode 100644 index 0000000000..9f923ab241 --- /dev/null +++ b/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/repository/CharacteristicsRepository.java @@ -0,0 +1,13 @@ +package com.baeldung.entitygraph.repository; + +import org.springframework.data.jpa.repository.EntityGraph; +import org.springframework.data.jpa.repository.JpaRepository; + +import com.baeldung.entitygraph.model.Characteristic; + +public interface CharacteristicsRepository extends JpaRepository { + + @EntityGraph(attributePaths = {"item"}) + Characteristic findByType(String type); + +} diff --git a/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/repository/ItemRepository.java b/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/repository/ItemRepository.java new file mode 100644 index 0000000000..b2a5f223b3 --- /dev/null +++ b/persistence-modules/spring-data-jpa-2/src/main/java/com/baeldung/entitygraph/repository/ItemRepository.java @@ -0,0 +1,13 @@ +package com.baeldung.entitygraph.repository; + +import org.springframework.data.jpa.repository.EntityGraph; +import org.springframework.data.jpa.repository.EntityGraph.EntityGraphType; +import org.springframework.data.jpa.repository.JpaRepository; + +import com.baeldung.entitygraph.model.Item; + +public interface ItemRepository extends JpaRepository { + + @EntityGraph(value = "Item.characteristics", type = EntityGraphType.FETCH) + Item findByName(String name); +} diff --git a/persistence-modules/spring-data-jpa-2/src/test/java/com/baeldung/entitygraph/EntityGraphIntegrationTest.java b/persistence-modules/spring-data-jpa-2/src/test/java/com/baeldung/entitygraph/EntityGraphIntegrationTest.java new file mode 100644 index 0000000000..24880a5dff --- /dev/null +++ b/persistence-modules/spring-data-jpa-2/src/test/java/com/baeldung/entitygraph/EntityGraphIntegrationTest.java @@ -0,0 +1,39 @@ +package com.baeldung.entitygraph; + +import static org.assertj.core.api.Assertions.assertThat; + +import org.junit.Test; +import org.junit.runner.RunWith; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest; +import org.springframework.test.context.jdbc.Sql; +import org.springframework.test.context.junit4.SpringRunner; + +import com.baeldung.entitygraph.model.Characteristic; +import com.baeldung.entitygraph.model.Item; +import com.baeldung.entitygraph.repository.CharacteristicsRepository; +import com.baeldung.entitygraph.repository.ItemRepository; + +@DataJpaTest +@RunWith(SpringRunner.class) +@Sql(scripts = "/entitygraph-data.sql") +public class EntityGraphIntegrationTest { + + @Autowired + private ItemRepository itemRepo; + + @Autowired + private CharacteristicsRepository characteristicsRepo; + + @Test + public void givenEntityGraph_whenCalled_shouldRetrunDefinedFields() { + Item item = itemRepo.findByName("Table"); + assertThat(item.getId()).isEqualTo(1L); + } + + @Test + public void givenAdhocEntityGraph_whenCalled_shouldRetrunDefinedFields() { + Characteristic characteristic = characteristicsRepo.findByType("Rigid"); + assertThat(characteristic.getId()).isEqualTo(1L); + } +} diff --git a/persistence-modules/spring-data-jpa-2/src/test/resources/entitygraph-data.sql b/persistence-modules/spring-data-jpa-2/src/test/resources/entitygraph-data.sql new file mode 100644 index 0000000000..685ec2c605 --- /dev/null +++ b/persistence-modules/spring-data-jpa-2/src/test/resources/entitygraph-data.sql @@ -0,0 +1,7 @@ +INSERT INTO Item(id,name) VALUES (1,'Table'); +INSERT INTO Item(id,name) VALUES (2,'Bottle'); + +INSERT INTO Characteristic(id,item_id, type) VALUES (1,1,'Rigid'); +INSERT INTO Characteristic(id,item_id,type) VALUES (2,1,'Big'); +INSERT INTO Characteristic(id,item_id,type) VALUES (3,2,'Fragile'); +INSERT INTO Characteristic(id,item_id,type) VALUES (4,2,'Small'); \ No newline at end of file