Dev 19389 (#13745)

* Java-19389 : commits made for adding two new test cases for UUID use:

* Java-19389 : commits made for adding two new test cases for UUID use:

* JAVA-19389: Changes made for incorporating review comments

persistence-modules/spring-data-jpa-filtering/src/main/java/com/baeldung/entity/Customer.java

@@ -1,8 +1,11 @@
 package com.baeldung.entity;
 
+import org.hibernate.annotations.Type;
+
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
+import java.util.UUID;
 
 @Entity
 public class Customer {
@@ -13,11 +16,20 @@ public class Customer {
     private String name;
     private String email;
 
+    @Type(type = "org.hibernate.type.UUIDCharType")
+    private UUID uuid;
+
     public Customer(String name, String email) {
         this.name = name;
         this.email = email;
     }
 
+    public Customer(String name, String email, UUID uuid) {
+        this.name = name;
+        this.email = email;
+        this.uuid = uuid;
+    }
+
     public String getName() {
         return name;
     }
@@ -34,4 +46,7 @@ public class Customer {
         this.email = email;
     }
 
+    public UUID getUuid() {
+        return this.uuid;
+    }
 }

persistence-modules/spring-data-jpa-filtering/src/main/java/com/baeldung/repository/CustomerRepository.java

@@ -6,6 +6,7 @@ import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
 
 import java.util.List;
+import java.util.UUID;
 
 public interface CustomerRepository extends JpaRepository<Customer, Long> {
 
@@ -16,4 +17,5 @@ public interface CustomerRepository extends JpaRepository<Customer, Long> {
     @Query("SELECT c FROM Customer c WHERE (:name is null or c.name = :name) and (:email is null or c.email = :email)")
     List<Customer> findCustomerByNameAndEmail(@Param("name") String name, @Param("email") String email);
 
+    List<Customer> findCustomerByUuid(@Param("uuid") UUID uuid);
 }

persistence-modules/spring-data-jpa-filtering/src/test/java/com/baeldung/repository/CustomerRepositoryIntegrationTest.java

@@ -12,6 +12,7 @@ import org.springframework.test.context.junit4.SpringRunner;
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
 import java.util.List;
+import java.util.UUID;
 
 import static org.junit.Assert.assertEquals;
 
@@ -30,6 +31,7 @@ public class CustomerRepositoryIntegrationTest {
         entityManager.persist(new Customer("A", "A@example.com"));
         entityManager.persist(new Customer("D", null));
         entityManager.persist(new Customer("D", "D@example.com"));
+        entityManager.persist(new Customer("C", null, UUID.fromString("c7c19ff4-8636-4b99-9591-c3327652f191")));
     }
 
     @Test
@@ -57,6 +59,20 @@ public class CustomerRepositoryIntegrationTest {
         assertEquals(2, customers.size());
     }
 
+    @Test
+    public void givenUUIDIsPresent_whenQueryMethod_thenFetchedCorrectly() {
+        List<Customer> customers = repository.findCustomerByUuid(UUID.fromString("c7c19ff4-8636-4b99-9591-c3327652f191"));
+
+        assertEquals(1, customers.size());
+    }
+
+    @Test
+    public void givenNullUuid_whenQueryMethod_thenFetchedCorrectly() {
+        List<Customer> customers = repository.findCustomerByUuid(null);
+
+        assertEquals(3, customers.size());
+    }
+
     @After
     public void cleanUp() {
         repository.deleteAll();