Merge pull request #5928 from amit2103/BAEL-10127

[BAEL-10127] - Added code for modelmapper article

spring-boot/pom.xml

@@ -162,6 +162,12 @@
             <groupId>javax.validation</groupId>
             <artifactId>validation-api</artifactId>
         </dependency>
+        
+        <dependency>
+            <groupId>org.modelmapper</groupId>
+            <artifactId>modelmapper</artifactId>
+            <version>${modelmapper.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -259,6 +265,7 @@
         <graphql-java-tools.version>5.2.4</graphql-java-tools.version>
         <guava.version>18.0</guava.version>
         <git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
+        <modelmapper.version>2.3.2</modelmapper.version>
     </properties>
 
 </project>

spring-boot/src/main/java/com/baeldung/modelmapper/PostApplication.java

@@ -0,0 +1,20 @@
+package com.baeldung.modelmapper;
+
+import org.modelmapper.ModelMapper;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+@SpringBootApplication
+public class PostApplication {
+    
+    public static void main(String[] args) {
+        SpringApplication.run(PostApplication.class, args);
+    }
+    
+    @Bean
+    public ModelMapper modelMapper() {
+        return new ModelMapper();
+    }
+
+}

spring-boot/src/main/java/com/baeldung/modelmapper/controller/PostRestController.java

@@ -0,0 +1,91 @@
+package com.baeldung.modelmapper.controller;
+
+import java.text.ParseException;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.modelmapper.ModelMapper;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+import com.baeldung.modelmapper.dto.PostDto;
+import com.baeldung.modelmapper.model.Post;
+import com.baeldung.modelmapper.service.IPostService;
+import com.baeldung.modelmapper.service.IUserService;
+
+@Controller
+public class PostRestController {
+    
+    @Autowired
+    private IPostService postService;
+ 
+    @Autowired
+    private IUserService userService;
+ 
+    @Autowired
+    private ModelMapper modelMapper;
+ 
+    @RequestMapping(method = RequestMethod.GET)
+    @ResponseBody
+    public List<PostDto> getPosts(
+            @PathVariable("page") int page,
+            @PathVariable("size") int size, 
+            @PathVariable("sortDir") String sortDir, 
+            @PathVariable("sort") String sort) {
+        
+        List<Post> posts = postService.getPostsList(page, size, sortDir, sort);
+        return posts.stream()
+          .map(post -> convertToDto(post))
+          .collect(Collectors.toList());
+    }
+ 
+    @RequestMapping(method = RequestMethod.POST)
+    @ResponseStatus(HttpStatus.CREATED)
+    @ResponseBody
+    public PostDto createPost(@RequestBody PostDto postDto) throws ParseException {
+        Post post = convertToEntity(postDto);
+        Post postCreated = postService.createPost(post);
+        return convertToDto(postCreated);
+    }
+ 
+    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
+    @ResponseBody
+    public PostDto getPost(@PathVariable("id") Long id) {
+        return convertToDto(postService.getPostById(id));
+    }
+ 
+    @RequestMapping(value = "/{id}", method = RequestMethod.PUT)
+    @ResponseStatus(HttpStatus.OK)
+    public void updatePost(@RequestBody PostDto postDto) throws ParseException {
+        Post post = convertToEntity(postDto);
+        postService.updatePost(post);
+    }
+
+    
+    private PostDto convertToDto(Post post) {
+        PostDto postDto = modelMapper.map(post, PostDto.class);
+        postDto.setSubmissionDate(post.getSubmissionDate(), 
+            userService.getCurrentUser().getPreference().getTimezone());
+        return postDto;
+    }
+    
+    private Post convertToEntity(PostDto postDto) throws ParseException {
+        Post post = modelMapper.map(postDto, Post.class);
+        post.setSubmissionDate(postDto.getSubmissionDateConverted(
+          userService.getCurrentUser().getPreference().getTimezone()));
+      
+        if (postDto.getId() != null) {
+            Post oldPost = postService.getPostById(postDto.getId());
+            post.setRedditID(oldPost.getRedditID());
+            post.setSent(oldPost.isSent());
+        }
+        return post;
+    }
+}

spring-boot/src/main/java/com/baeldung/modelmapper/dto/PostDto.java

@@ -0,0 +1,71 @@
+package com.baeldung.modelmapper.dto;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
+
+public class PostDto {
+
+    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
+
+    private Long id;
+
+    private String title;
+
+    private String url;
+
+    private String date;
+
+    private UserDto user;
+
+    public Date getSubmissionDateConverted(String timezone) throws ParseException {
+        dateFormat.setTimeZone(TimeZone.getTimeZone(timezone));
+        return dateFormat.parse(this.date);
+    }
+
+    public void setSubmissionDate(Date date, String timezone) {
+        dateFormat.setTimeZone(TimeZone.getTimeZone(timezone));
+        this.date = dateFormat.format(date);
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getDate() {
+        return date;
+    }
+
+    public void setDate(String date) {
+        this.date = date;
+    }
+
+    public UserDto getUser() {
+        return user;
+    }
+
+    public void setUser(UserDto user) {
+        this.user = user;
+    }
+}

spring-boot/src/main/java/com/baeldung/modelmapper/dto/UserDto.java

@@ -0,0 +1,14 @@
+package com.baeldung.modelmapper.dto;
+
+public class UserDto {
+
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

spring-boot/src/main/java/com/baeldung/modelmapper/model/Post.java

@@ -0,0 +1,98 @@
+package com.baeldung.modelmapper.model;
+
+import java.util.Date;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Post {
+    
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    
+    private String title;
+
+    private String url;
+
+    private String date;
+    
+    private String redditID;
+    
+    private Date submissionDate;
+    
+    private boolean sent;
+    
+    private String userName;
+    
+    public Post() {
+        
+    }
+    
+    public boolean isSent() {
+        return sent;
+    }
+
+    public void setSent(boolean sent) {
+        this.sent = sent;
+    }
+    
+    public String getRedditID() {
+        return redditID;
+    }
+
+    public void setRedditID(String redditID) {
+        this.redditID = redditID;
+    }
+    
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getDate() {
+        return date;
+    }
+
+    public void setDate(String date) {
+        this.date = date;
+    }
+    
+    public Date getSubmissionDate() {
+        return submissionDate;
+    }
+
+    public void setSubmissionDate(Date submissionDate) {
+        this.submissionDate = submissionDate;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+}

spring-boot/src/main/java/com/baeldung/modelmapper/model/Preference.java

@@ -0,0 +1,32 @@
+package com.baeldung.modelmapper.model;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Preference {
+    
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    
+    private String timezone;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTimezone() {
+        return timezone;
+    }
+
+    public void setTimezone(String timezone) {
+        this.timezone = timezone;
+    }
+}

spring-boot/src/main/java/com/baeldung/modelmapper/model/User.java

@@ -0,0 +1,44 @@
+package com.baeldung.modelmapper.model;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.OneToOne;
+
+@Entity
+public class User {
+    
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    
+    private String name;
+    
+    @OneToOne
+    Preference preference;
+    
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public Preference getPreference() {
+        return preference;
+    }
+
+    public void setPreference(Preference preference) {
+        this.preference = preference;
+    }
+}

spring-boot/src/main/java/com/baeldung/modelmapper/repository/PostRepository.java

@@ -0,0 +1,21 @@
+package com.baeldung.modelmapper.repository;
+
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.PagingAndSortingRepository;
+import org.springframework.data.repository.query.Param;
+
+import com.baeldung.modelmapper.model.Post;
+import com.baeldung.modelmapper.model.User;
+
+public interface PostRepository extends JpaRepository<Post, Long>, PagingAndSortingRepository<Post, Long> {
+
+    @Query("select u from Post u where u.userName=:userName")
+    Page<Post> findByUser(@Param("userName") String userName, Pageable pageReq);
+
+    default Page<Post> findByUser(User user, Pageable pageReq) {
+        return findByUser(user.getName(), pageReq);
+    }
+}

spring-boot/src/main/java/com/baeldung/modelmapper/service/IPostService.java

@@ -0,0 +1,17 @@
+package com.baeldung.modelmapper.service;
+
+import java.util.List;
+
+import com.baeldung.modelmapper.model.Post;
+
+public interface IPostService {
+
+    List<Post> getPostsList(int page, int size, String sortDir, String sort);
+
+    void updatePost(Post post);
+
+    Post createPost(Post post);
+
+    Post getPostById(Long id);
+
+}

spring-boot/src/main/java/com/baeldung/modelmapper/service/IUserService.java

@@ -0,0 +1,9 @@
+package com.baeldung.modelmapper.service;
+
+import com.baeldung.modelmapper.model.User;
+
+public interface IUserService {
+
+    User getCurrentUser();
+
+}

spring-boot/src/main/java/com/baeldung/modelmapper/service/PostService.java

@@ -0,0 +1,47 @@
+package com.baeldung.modelmapper.service;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Sort;
+import org.springframework.stereotype.Service;
+
+import com.baeldung.modelmapper.model.Post;
+import com.baeldung.modelmapper.repository.PostRepository;
+
+@Service
+public class PostService implements IPostService {
+
+    @Autowired
+    private PostRepository postRepository;
+    
+    @Autowired
+    private IUserService userService;
+
+    @Override
+    public List<Post> getPostsList(int page, int size, String sortDir, String sort) {
+
+        PageRequest pageReq
+        = PageRequest.of(page, size, Sort.Direction.fromString(sortDir), sort);
+
+        Page<Post> posts = postRepository.findByUser(userService.getCurrentUser(), pageReq);
+        return posts.getContent();
+    }
+
+    @Override
+    public void updatePost(Post post) {
+        postRepository.save(post);
+    }
+
+    @Override
+    public Post createPost(Post post) {
+        return postRepository.save(post);
+    }
+
+    @Override
+    public Post getPostById(Long id) {
+        return postRepository.getOne(id);
+    }
+}

spring-boot/src/main/java/com/baeldung/modelmapper/service/UserService.java

@@ -0,0 +1,25 @@
+package com.baeldung.modelmapper.service;
+
+import org.springframework.stereotype.Service;
+
+import com.baeldung.modelmapper.model.Preference;
+import com.baeldung.modelmapper.model.User;
+
+@Service
+public class UserService implements IUserService {
+
+    @Override
+    public User getCurrentUser() {
+        
+        Preference preference = new Preference();
+        preference.setId(1L);
+        preference.setTimezone("Asia/Calcutta");
+        
+        User user = new User();
+        user.setId(1L);
+        user.setName("Micheal");
+        user.setPreference(preference);
+                
+        return user;
+    }
+}

spring-boot/src/test/java/com/baeldung/modelmapper/PostDtoUnitTest.java

@@ -0,0 +1,40 @@
+package com.baeldung.modelmapper;
+
+import static org.junit.Assert.assertEquals;
+import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
+import org.junit.Test;
+import org.modelmapper.ModelMapper;
+
+import com.baeldung.modelmapper.dto.PostDto;
+import com.baeldung.modelmapper.model.Post;
+
+public class PostDtoUnitTest {
+    
+    private ModelMapper modelMapper = new ModelMapper();
+    
+    @Test
+    public void whenConvertPostEntityToPostDto_thenCorrect() {
+        Post post = new Post();
+        post.setId(Long.valueOf(1));
+        post.setTitle(randomAlphabetic(6));
+        post.setUrl("www.test.com");
+ 
+        PostDto postDto = modelMapper.map(post, PostDto.class);
+        assertEquals(post.getId(), postDto.getId());
+        assertEquals(post.getTitle(), postDto.getTitle());
+        assertEquals(post.getUrl(), postDto.getUrl());
+    }
+ 
+    @Test
+    public void whenConvertPostDtoToPostEntity_thenCorrect() {
+        PostDto postDto = new PostDto();
+        postDto.setId(Long.valueOf(1));
+        postDto.setTitle(randomAlphabetic(6));
+        postDto.setUrl("www.test.com");
+ 
+        Post post = modelMapper.map(postDto, Post.class);
+        assertEquals(postDto.getId(), post.getId());
+        assertEquals(postDto.getTitle(), post.getTitle());
+        assertEquals(postDto.getUrl(), post.getUrl());
+    }
+}