BAEL-2803 (#6640)

* added sample code for eval article

* BAEL-2803 Sample Code

* updated tests, repo method names

* moved sources for BAEL-2803 here

* removed dependencies introduced by BAEL-2803

* re-added sources

* moved code to new module

* removed eval article code

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

@@ -0,0 +1,48 @@
+package com.baeldung.exists;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+/**
+ * @author paullatzelsperger
+ * @since 2019-03-20
+ */
+@Entity
+public class Car {
+
+    @Id
+    @GeneratedValue
+    private int id;
+    private Integer power;
+    private String model;
+
+    Car() {
+
+    }
+
+    public Car(int power, String model) {
+        this.power = power;
+        this.model = model;
+    }
+
+    public Integer getPower() {
+        return power;
+    }
+
+    public void setPower(Integer power) {
+        this.power = power;
+    }
+
+    public String getModel() {
+        return model;
+    }
+
+    public void setModel(String model) {
+        this.model = model;
+    }
+
+    public int getId() {
+        return id;
+    }
+}

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

@@ -0,0 +1,24 @@
+package com.baeldung.exists;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+/**
+ * @author paullatzelsperger
+ * @since 2019-03-20
+ */
+@Repository
+public interface CarRepository extends JpaRepository<Car, Integer> {
+
+    boolean existsCarByPower(int power);
+
+    boolean existsCarByModel(String model);
+
+    @Query("select case when count(c)> 0 then true else false end from Car c where c.model = :model")
+    boolean existsCarExactCustomQuery(@Param("model") String model);
+
+    @Query("select case when count(c)> 0 then true else false end from Car c where lower(c.model) like lower(:model)")
+    boolean existsCarLikeCustomQuery(@Param("model") String model);
+}

persistence-modules/spring-data-jpa-2/src/test/java/com/baeldung/exists/CarRepositoryIntegrationTest.java

@@ -1,8 +1,6 @@
 package com.baeldung.exists;
 
-import static org.assertj.core.api.Assertions.assertThat;
+import com.baeldung.Application;
-import static org.springframework.data.domain.ExampleMatcher.GenericPropertyMatchers.ignoreCase;
-
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -13,13 +11,12 @@ import org.springframework.data.domain.Example;
 import org.springframework.data.domain.ExampleMatcher;
 import org.springframework.test.context.junit4.SpringRunner;
 
-import com.baeldung.boot.Application;
-import com.baeldung.boot.domain.Car;
-import com.baeldung.boot.repository.CarRepository;
-
 import java.util.Arrays;
 import java.util.List;
 
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.data.domain.ExampleMatcher.GenericPropertyMatchers.ignoreCase;
+
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = {Application.class})
 public class CarRepositoryIntegrationTest {