[JAVA-41266]

persistence-modules/spring-data-jpa-query-2/README.md

@@ -7,8 +7,10 @@ This module contains articles about querying data using Spring Data JPA .
 - [Hibernate Pagination](https://www.baeldung.com/hibernate-pagination)
 - [Sorting with Hibernate](https://www.baeldung.com/hibernate-sort)
 - [Stored Procedures with Hibernate](https://www.baeldung.com/stored-procedures-with-hibernate-tutorial)
-- [Eager/Lazy Loading in Hibernate](https://www.baeldung.com/hibernate-lazy-eager-loading)
-- [Auditing with JPA, Hibernate, and Spring Data JPA](https://www.baeldung.com/database-auditing-jpa)
+- [Implement Update-Or-Insert in Spring Data JPA](https://www.baeldung.com/spring-data-jpa-update-or-insert)
+- [The Exists Query in Spring Data](https://www.baeldung.com/spring-data-exists-query)
+- [Spring Data JPA and Named Entity Graphs](https://www.baeldung.com/spring-data-jpa-named-entity-graphs)
+- [Spring Data JPA Query by Example](https://www.baeldung.com/spring-data-query-by-example)
 - More articles: [[<-- prev]](../spring-data-jpa-query)[[more -->]](../spring-data-jpa-query-3)
 
 ### Eclipse Config 

persistence-modules/spring-data-jpa-query-2/pom.xml

@@ -13,17 +13,6 @@
         <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-maven-plugin</artifactId>
-                <configuration>
-                    <skip>true</skip>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
 
     <dependencies>
         <dependency>
@@ -104,6 +93,19 @@
         </dependency>
     </dependencies>
 
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <skip>true</skip>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
     <properties>
         <tomcat-dbcp.version>9.0.0.M26</tomcat-dbcp.version>
         <jta.version>1.1</jta.version>

persistence-modules/spring-data-jpa-query/src/main/java/com/baeldung/boot/passenger/Passenger.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/boot/passenger/Passenger.java

@@ -1,11 +1,12 @@
 package com.baeldung.boot.passenger;
 
+import java.util.Objects;
+
 import jakarta.persistence.Basic;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.Id;
-import java.util.Objects;
 
 @Entity
 class Passenger {

persistence-modules/spring-data-jpa-query/src/main/java/com/baeldung/boot/passenger/PassengerRepositoryImpl.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/boot/passenger/PassengerRepositoryImpl.java

@@ -1,10 +1,11 @@
 package com.baeldung.boot.passenger;
 
+import java.util.List;
+
 import org.springframework.stereotype.Repository;
 
 import jakarta.persistence.EntityManager;
 import jakarta.persistence.PersistenceContext;
-import java.util.List;
 
 @Repository
 class PassengerRepositoryImpl implements CustomPassengerRepository {

persistence-modules/spring-data-jpa-query/src/main/java/com/baeldung/entitygraph/model/Characteristic.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/entitygraph/model/Characteristic.java

@@ -1,43 +1,43 @@
-package com.baeldung.entitygraph.model;
-
-import jakarta.persistence.Entity;
-import jakarta.persistence.FetchType;
-import jakarta.persistence.Id;
-import jakarta.persistence.JoinColumn;
-import jakarta.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;
-    }
-}
+package com.baeldung.entitygraph.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.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;
+    }
+}

persistence-modules/spring-data-jpa-query/src/main/java/com/baeldung/entitygraph/model/Item.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/entitygraph/model/Item.java

@@ -1,48 +1,48 @@
-package com.baeldung.entitygraph.model;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import jakarta.persistence.Entity;
-import jakarta.persistence.Id;
-import jakarta.persistence.NamedAttributeNode;
-import jakarta.persistence.NamedEntityGraph;
-import jakarta.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<Characteristic> 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<Characteristic> getCharacteristics() {
-        return characteristics;
-    }
-
-    public void setCharacteristics(List<Characteristic> characteristics) {
-        this.characteristics = characteristics;
-    }
-}
+package com.baeldung.entitygraph.model;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.NamedAttributeNode;
+import jakarta.persistence.NamedEntityGraph;
+import jakarta.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<Characteristic> 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<Characteristic> getCharacteristics() {
+        return characteristics;
+    }
+
+    public void setCharacteristics(List<Characteristic> characteristics) {
+        this.characteristics = characteristics;
+    }
+}

persistence-modules/spring-data-jpa-query/src/main/java/com/baeldung/entitygraph/repository/CharacteristicsRepository.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/entitygraph/repository/CharacteristicsRepository.java

@@ -1,13 +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<Characteristic, Long> {
-    
-    @EntityGraph(attributePaths = {"item"})
-    Characteristic findByType(String type);    
-    
-}
+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<Characteristic, Long> {
+
+    @EntityGraph(attributePaths = {"item"})
+    Characteristic findByType(String type);    
+
+}

persistence-modules/spring-data-jpa-query/src/main/java/com/baeldung/entitygraph/repository/ItemRepository.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/entitygraph/repository/ItemRepository.java

@@ -1,13 +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<Item, Long> {
-
-    @EntityGraph(value = "Item.characteristics", type = EntityGraphType.FETCH)
-    Item findByName(String name);
-}
+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<Item, Long> {
+
+    @EntityGraph(value = "Item.characteristics", type = EntityGraphType.FETCH)
+    Item findByName(String name);
+}

persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/exists/Application.java

@@ -0,0 +1,13 @@
+package com.baeldung.exists;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+}

persistence-modules/spring-data-jpa-query-4/src/main/java/com/baeldung/spring/data/jpa/upsert/CreditCard.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/upsert/CreditCard.java

@@ -1,8 +1,11 @@
-package com.baeldung.spring.data.jpa.upsert;
-
-import javax.persistence.*;
-
-import com.fasterxml.jackson.annotation.JsonIgnore;
+package com.baeldung.upsert;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.SequenceGenerator;
+import jakarta.persistence.Table;
 
 @Entity
 @Table(name = "credit_card")

persistence-modules/spring-data-jpa-query-4/src/main/java/com/baeldung/spring/data/jpa/upsert/CreditCardLogic.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/upsert/CreditCardLogic.java

@@ -1,18 +1,16 @@
-package com.baeldung.spring.data.jpa.upsert;
+package com.baeldung.upsert;
 
 import java.math.BigInteger;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-import java.util.stream.Collectors;
 
-import javax.persistence.EntityManager;
-import javax.persistence.Query;
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.Query;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import com.baeldung.upsert.CreditCardRepository;
+
 @Service
 public class CreditCardLogic {
 
@@ -36,7 +34,7 @@ public void updateOrInsertUsingCustomLogic(CreditCard creditCard) {
     public void updateOrInsertUsingBuiltInFeature(CreditCard creditCard) {
         Long id = creditCard.getId();
         if (creditCard.getId() == null) {
-            BigInteger nextVal = (BigInteger) em.createNativeQuery("SELECT nextval('credit_card_id_seq')")
+            Long nextVal = (Long) em.createNativeQuery("SELECT nextval('credit_card_id_seq')")
                 .getSingleResult();
             id = nextVal.longValue();
         }

persistence-modules/spring-data-jpa-query-4/src/main/java/com/baeldung/spring/data/jpa/upsert/CreditCardRepository.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/upsert/CreditCardRepository.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.data.jpa.upsert;
+package com.baeldung.upsert;
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.transaction.annotation.Transactional;

persistence-modules/spring-data-jpa-query-4/src/main/java/com/baeldung/spring/data/jpa/upsert/UpsertApplication.java → persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/upsert/UpsertApplication.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.data.jpa.upsert;
+package com.baeldung.upsert;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;