Add query and native query

src/main/java/com/cubetiqs/demo/domain/view/UserView.java

@@ -0,0 +1,20 @@
+package com.cubetiqs.demo.domain.view;
+
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@JsonPropertyOrder(value = {
+        "email",
+        "id"
+})
+public class UserView implements Serializable {
+    private Long id;
+    private String email;
+}

src/main/java/com/cubetiqs/demo/repository/UserRepository.java

@@ -1,9 +1,24 @@
 package com.cubetiqs.demo.repository;
 
 import com.cubetiqs.demo.domain.UserEntity;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
+import java.util.Optional;
+
+@SuppressWarnings("ALL")
 @Repository
 public interface UserRepository extends BaseRepository<UserEntity, Long> {
-        
+    Optional<UserEntity> findFirstByEmail(String email);
+
+    @Query(value = "select * from users u where u.email = ?1", nativeQuery = true)
+    Optional<UserEntity> fetchFirstByEmail(String email);
+
+    @Query(value = "select * from users u", nativeQuery = true)
+    Page<UserEntity> fetchAllUsers(Pageable pageable);
+
+    @Query(value = "select * from users u where lower(u.email) like ?1", nativeQuery = true)
+    Page<UserEntity> searchByEmail(String likeEmail, Pageable pageable);
 }

src/main/java/com/cubetiqs/demo/rest/UserController.java

@@ -1,9 +1,13 @@
 package com.cubetiqs.demo.rest;
 
 import com.cubetiqs.demo.domain.UserEntity;
+import com.cubetiqs.demo.domain.view.UserView;
 import com.cubetiqs.demo.repository.UserRepository;
+import com.cubetiqs.demo.service.UserNotFoundException;
 import com.cubetiqs.demo.service.UserService;
+import com.cubetiqs.demo.util.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -12,6 +16,7 @@ import org.springframework.web.bind.annotation.*;
 import java.util.List;
 import java.util.Optional;
 
+
 @RestController
 @RequestMapping(path = {"/users"})
 public class UserController {
@@ -29,6 +34,30 @@ public class UserController {
         return userService.findAllActives();
     }
 
+    @GetMapping("/searchByEmail")
+    public Page<UserView> searchByEmail(
+            Pageable pageable,
+            @RequestParam(value = "q", defaultValue = "") String q
+    ) {
+        return userService.searchByEmailAsView(StringUtils.stringQuery(q), pageable);
+    }
+
+    @GetMapping("/allUsers")
+    public Page<UserEntity> fetchAllUsers(Pageable pageable) {
+        return userRepository.fetchAllUsers(Pageable.unpaged());
+    }
+
+    @GetMapping("/findByEmail/{email}")
+    public ResponseEntity<Object> getUserById(
+            @PathVariable String email
+    ) {
+        try {
+            return ResponseEntity.ok(userService.findByEmail(email));
+        } catch (UserNotFoundException ex) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body(ex.getMessage());
+        }
+    }
+
     @GetMapping("/{id}")
     public UserEntity getUserById(
             @PathVariable Long id

src/main/java/com/cubetiqs/demo/service/UserNotFoundException.java

@@ -0,0 +1,7 @@
+package com.cubetiqs.demo.service;
+
+public class UserNotFoundException extends Exception {
+    public UserNotFoundException(String message) {
+        super(message);
+    }
+}

src/main/java/com/cubetiqs/demo/service/UserService.java

@@ -1,9 +1,14 @@
 package com.cubetiqs.demo.service;
 
 import com.cubetiqs.demo.domain.UserEntity;
+import com.cubetiqs.demo.domain.view.UserView;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 
 @Service
 public interface UserService extends BaseService<UserEntity, Long> {
-
+    UserEntity findByEmail(String email) throws UserNotFoundException;
+    Page<UserEntity> searchByEmail(String email, Pageable pageable);
+    Page<UserView> searchByEmailAsView(String email, Pageable pageable);
 }

src/main/java/com/cubetiqs/demo/service/UserServiceImpl.java

@@ -1,6 +1,7 @@
 package com.cubetiqs.demo.service;
 
 import com.cubetiqs.demo.domain.UserEntity;
+import com.cubetiqs.demo.domain.view.UserView;
 import com.cubetiqs.demo.repository.BaseRepository;
 import com.cubetiqs.demo.repository.UserRepository;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -9,6 +10,7 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 
 import java.util.List;
+import java.util.Optional;
 
 @Service
 public class UserServiceImpl extends BaseServiceImpl<UserEntity, Long> implements UserService {
@@ -33,4 +35,25 @@ public class UserServiceImpl extends BaseServiceImpl<UserEntity, Long> implement
     public List<UserEntity> findAllActives() {
         return userRepository.findAllActives();
     }
+
+    @Override
+    public UserEntity findByEmail(String email) throws UserNotFoundException {
+        Optional<UserEntity> opt = userRepository.fetchFirstByEmail(email);
+        if (opt.isPresent()) {
+            return opt.get();
+        }
+
+        throw new UserNotFoundException("user does not exists");
+    }
+
+    @Override
+    public Page<UserEntity> searchByEmail(String email, Pageable pageable) {
+        return userRepository.searchByEmail(email, pageable);
+    }
+
+    @Override
+    public Page<UserView> searchByEmailAsView(String email, Pageable pageable) {
+        Page<UserEntity> users = userRepository.searchByEmail(email, pageable);
+        return users.map(s -> new UserView(s.getId(), s.getEmail()));
+    }
 }

src/main/java/com/cubetiqs/demo/util/StringUtils.java

@@ -0,0 +1,8 @@
+package com.cubetiqs.demo.util;
+
+public final class StringUtils {
+    public static String stringQuery(String q) {
+        return "%" + q.toLowerCase() + "%";
+    }
+}
+