Refactor InputConverter and OutputConverter

src/main/java/cc/ryanc/halo/model/dto/CommentViewOutputDTO.java

@@ -2,7 +2,7 @@ package cc.ryanc.halo.model.dto;
 
 import cc.ryanc.halo.model.domain.Comment;
 import cc.ryanc.halo.model.domain.Post;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import lombok.Data;
 
 import java.util.Date;
@@ -12,7 +12,7 @@ import java.util.Date;
  * @date : 2019-03-09
  */
 @Data
-public class CommentViewOutputDTO extends AbstractOutputConverter<CommentViewOutputDTO, Comment> {
+public class CommentViewOutputDTO implements OutputConverter<CommentViewOutputDTO, Comment> {
 
     private Long commentId;
 

src/main/java/cc/ryanc/halo/model/dto/PageAdminOutputDTO.java

@@ -2,7 +2,7 @@ package cc.ryanc.halo.model.dto;
 
 import cc.ryanc.halo.model.domain.Comment;
 import cc.ryanc.halo.model.domain.Post;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 
@@ -14,7 +14,7 @@ import java.util.List;
  * @date : 2019-03-09
  */
 @Data
-public class PageAdminOutputDTO extends AbstractOutputConverter<PageAdminOutputDTO, Post> {
+public class PageAdminOutputDTO implements OutputConverter<PageAdminOutputDTO, Post> {
 
     private Long postId;
 

src/main/java/cc/ryanc/halo/model/dto/PostDetailOutputDTO.java

@@ -1,7 +1,7 @@
 package cc.ryanc.halo.model.dto;
 
 import cc.ryanc.halo.model.domain.*;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 
@@ -14,7 +14,7 @@ import java.util.List;
  * @author johnniang
  */
 @Data
-public class PostDetailOutputDTO extends AbstractOutputConverter<PostDetailOutputDTO, Post> {
+public class PostDetailOutputDTO implements OutputConverter<PostDetailOutputDTO, Post> {
 
     private Long postId;
 

src/main/java/cc/ryanc/halo/model/dto/PostSimpleOutputDTO.java

@@ -1,7 +1,9 @@
 package cc.ryanc.halo.model.dto;
 
-import cc.ryanc.halo.model.domain.*;
+import cc.ryanc.halo.model.domain.Category;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.domain.Post;
+import cc.ryanc.halo.model.domain.Tag;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 
@@ -14,7 +16,7 @@ import java.util.List;
  * @author johnniang
  */
 @Data
-public class PostSimpleOutputDTO extends AbstractOutputConverter<PostSimpleOutputDTO, Post> {
+public class PostSimpleOutputDTO implements OutputConverter<PostSimpleOutputDTO, Post> {
 
     private Long postId;
 

src/main/java/cc/ryanc/halo/model/dto/PostViewOutputDTO.java

@@ -1,7 +1,7 @@
 package cc.ryanc.halo.model.dto;
 
 import cc.ryanc.halo.model.domain.Post;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 
@@ -12,7 +12,7 @@ import java.util.Date;
  * @date : 2019-03-09
  */
 @Data
-public class PostViewOutputDTO extends AbstractOutputConverter<PostViewOutputDTO, Post> {
+public class PostViewOutputDTO implements OutputConverter<PostViewOutputDTO, Post> {
 
     private Long postId;
 

src/main/java/cc/ryanc/halo/model/dto/base/AbstractInputConverter.java

@@ -11,6 +11,7 @@ import static cc.ryanc.halo.utils.BeanUtils.updateProperties;
  *
  * @author johnniang
  */
+@Deprecated
 public abstract class AbstractInputConverter<DOMAIN> implements InputConverter<DOMAIN> {
 
     @SuppressWarnings("unchecked")

src/main/java/cc/ryanc/halo/model/dto/base/AbstractOutputConverter.java

@@ -12,7 +12,8 @@ import static cc.ryanc.halo.utils.BeanUtils.updateProperties;
  *
  * @author johnniang
  */
-public abstract class AbstractOutputConverter<DTO, DOMAIN> implements OutputConverter<DTO, DOMAIN> {
+@Deprecated
+public abstract class AbstractOutputConverter<DTO extends OutputConverter<DTO, DOMAIN>, DOMAIN> implements OutputConverter<DTO, DOMAIN> {
 
     @SuppressWarnings("unchecked")
     private final Class<DTO> dtoType = (Class<DTO>) fetchType(0);
@@ -23,9 +24,9 @@ public abstract class AbstractOutputConverter<DTO, DOMAIN> implements OutputConv
 
     @Override
     @SuppressWarnings("unchecked")
-    public DTO convertFrom(DOMAIN domain) {
+    public <T extends DTO> T convertFrom(DOMAIN domain) {
         updateProperties(domain, this);
-        return (DTO) this;
+        return (T) this;
     }
 
     /**

src/main/java/cc/ryanc/halo/model/dto/base/InputConverter.java

@@ -1,5 +1,13 @@
 package cc.ryanc.halo.model.dto.base;
 
+import cc.ryanc.halo.utils.ReflectionUtils;
+
+import java.lang.reflect.ParameterizedType;
+import java.util.Objects;
+
+import static cc.ryanc.halo.utils.BeanUtils.transformFrom;
+import static cc.ryanc.halo.utils.BeanUtils.updateProperties;
+
 /**
  * Converter interface for input DTO.
  *
@@ -12,13 +20,26 @@ public interface InputConverter<DOMAIN> {
      *
      * @return new domain with same value(not null)
      */
-    DOMAIN convertTo();
+    @SuppressWarnings("unchecked")
+    default DOMAIN convertTo() {
+        // Get parameterized type
+        ParameterizedType currentType = ReflectionUtils.getParameterizedType(InputConverter.class, this.getClass());
+
+        // Assert not equal
+        Objects.requireNonNull(currentType, "Cannot fetch actual type because parameterized type is null");
+
+        Class<DOMAIN> domainClass = (Class<DOMAIN>) currentType.getActualTypeArguments()[0];
+
+        return transformFrom(this, domainClass);
+    }
 
     /**
      * Update a domain by dto.(shallow)
      *
      * @param domain updated domain
      */
-    void update(DOMAIN domain);
+    default void update(DOMAIN domain) {
+        updateProperties(this, domain);
+    }
 }
 

src/main/java/cc/ryanc/halo/model/dto/base/OutputConverter.java

@@ -1,11 +1,17 @@
 package cc.ryanc.halo.model.dto.base;
 
+import static cc.ryanc.halo.utils.BeanUtils.updateProperties;
+
 /**
  * Converter interface for output DTO.
  *
+ * <b>The implementation type must be equal to DTO type</b>
+ *
+ * @param <DTO>    the implementation class type
+ * @param <DOMAIN> doamin type
  * @author johnniang
  */
-public interface OutputConverter<DTO, DOMAIN> {
+public interface OutputConverter<DTO extends OutputConverter<DTO, DOMAIN>, DOMAIN> {
 
     /**
      * Convert from domain.(shallow)
@@ -13,5 +19,11 @@ public interface OutputConverter<DTO, DOMAIN> {
      * @param domain domain data
      * @return converted dto data
      */
-    DTO convertFrom(DOMAIN domain);
+    @SuppressWarnings("unchecked")
+    default <T extends DTO> T convertFrom(DOMAIN domain) {
+
+        updateProperties(domain, this);
+
+        return (T) this;
+    }
 }

src/main/java/cc/ryanc/halo/model/params/JournalParam.java

@@ -1,7 +1,7 @@
 package cc.ryanc.halo.model.params;
 
 import cc.ryanc.halo.model.domain.Post;
-import cc.ryanc.halo.model.dto.base.AbstractInputConverter;
+import cc.ryanc.halo.model.dto.base.InputConverter;
 import cc.ryanc.halo.model.enums.PostTypeEnum;
 import cc.ryanc.halo.utils.MarkdownUtils;
 import lombok.Data;
@@ -13,7 +13,7 @@ import lombok.Data;
  * @date : 2019/03/04
  */
 @Data
-public class JournalParam extends AbstractInputConverter<Post> {
+public class JournalParam implements InputConverter<Post> {
 
     /**
      * 标题

src/main/java/cc/ryanc/halo/utils/BeanUtils.java

@@ -52,7 +52,7 @@ public class BeanUtils {
             // Return the target instance
             return targetInstance;
         } catch (Exception e) {
-            throw new BeanUtilsException("Failed to new " + targetClass.getName() + "instance or copy properties", e);
+            throw new BeanUtilsException("Failed to new " + targetClass.getName() + " instance or copy properties", e);
         }
     }
 

src/main/java/cc/ryanc/halo/utils/ReflectionUtils.java

@@ -0,0 +1,74 @@
+package cc.ryanc.halo.utils;
+
+import org.springframework.lang.NonNull;
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
+
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+
+/**
+ * Reflection utilities.
+ *
+ * @author johnniang
+ */
+public class ReflectionUtils {
+
+    private ReflectionUtils() {
+    }
+
+    /**
+     * Gets parameterized type.
+     *
+     * @param interfaceType interface type must not be null
+     * @param genericTypes  generic type array
+     * @return parameterized type of the interface or null if it is mismatch
+     */
+    @Nullable
+    public static ParameterizedType getParameterizedType(@NonNull Class<?> interfaceType, Type... genericTypes) {
+        Assert.notNull(interfaceType, "Interface type must not be null");
+
+        ParameterizedType currentType = null;
+
+        for (Type genericType : genericTypes) {
+            if (genericType instanceof ParameterizedType) {
+                ParameterizedType parameterizedType = (ParameterizedType) genericType;
+                if (parameterizedType.getRawType().getTypeName().equals(interfaceType.getTypeName())) {
+                    currentType = parameterizedType;
+                    break;
+                }
+            }
+        }
+
+        return currentType;
+    }
+
+    /**
+     * Gets parameterized type.
+     *
+     * @param interfaceType       interface type must not be null
+     * @param implementationClass implementation class of the interface must not be null
+     * @return parameterized type of the interface or null if it is mismatch
+     */
+    @Nullable
+    public static ParameterizedType getParameterizedType(@NonNull Class<?> interfaceType, Class<?> implementationClass) {
+        Assert.notNull(interfaceType, "Interface type must not be null");
+
+        if (implementationClass == null) {
+            // If the super class is Object parent then return null
+            return null;
+        }
+
+        // Get parameterized type
+        ParameterizedType currentType = getParameterizedType(interfaceType, implementationClass.getGenericInterfaces());
+
+        if (currentType != null) {
+            // return the current type
+            return currentType;
+        }
+
+        Class<?> superclass = implementationClass.getSuperclass();
+
+        return getParameterizedType(interfaceType, superclass);
+    }
+}

src/main/java/cc/ryanc/halo/web/controller/admin/AdminController.java

@@ -110,7 +110,7 @@ public class AdminController extends BaseController {
         //查询最新的文章
         final List<PostViewOutputDTO> postsLatest = postService.findPostLatest()
                 .stream()
-                .map(post -> new PostViewOutputDTO().convertFrom(post))
+                .map(post -> (PostViewOutputDTO) new PostViewOutputDTO().convertFrom(post))
                 .collect(Collectors.toList());
         model.addAttribute("postsLatest", postsLatest);
 
@@ -121,7 +121,7 @@ public class AdminController extends BaseController {
         //查询最新的评论
         final List<CommentViewOutputDTO> commentsLatest = commentService.findCommentsLatest()
                 .stream()
-                .map(comment -> new CommentViewOutputDTO().convertFrom(comment))
+                .map(comment -> (CommentViewOutputDTO) new CommentViewOutputDTO().convertFrom(comment))
                 .collect(Collectors.toList());
         model.addAttribute("commentsLatest", commentsLatest);
 

src/main/java/cc/ryanc/halo/web/controller/admin/MenuController.java

@@ -48,9 +48,9 @@ public class MenuController {
     public String menus(Model model) {
         List<PostViewOutputDTO> posts = postService.findAll(PostTypeEnum.POST_TYPE_PAGE.getDesc())
                 .stream()
-                .map(post -> new PostViewOutputDTO().convertFrom(post))
+                .map(post -> (PostViewOutputDTO) new PostViewOutputDTO().convertFrom(post))
                 .collect(Collectors.toList());
-        model.addAttribute("posts",posts);
+        model.addAttribute("posts", posts);
         return "admin/admin_menu";
     }
 

src/main/java/cc/ryanc/halo/web/controller/admin/PageController.java

@@ -87,8 +87,10 @@ public class PageController {
     public String pages(Model model) {
         final List<PageAdminOutputDTO> posts = postService.findAll(PostTypeEnum.POST_TYPE_PAGE.getDesc())
                 .stream()
-                .map(post -> new PageAdminOutputDTO().convertFrom(post))
+                .map(post -> (PageAdminOutputDTO) new PageAdminOutputDTO().convertFrom(post))
                 .collect(Collectors.toList());
+
+
         model.addAttribute("pages", posts);
         return "admin/admin_page";
     }

src/main/java/cc/ryanc/halo/web/controller/admin/PostController.java

@@ -94,6 +94,9 @@ public class PostController extends BaseController {
                         @RequestParam(value = "status", defaultValue = "0") Integer status,
                         @PageableDefault(sort = "postDate", direction = DESC) Pageable pageable) {
         final Page<Post> posts = postService.findPostByStatus(status, PostTypeEnum.POST_TYPE_POST.getDesc(), pageable);
+
+        Page<PostViewOutputDTO> postViewOutputDTOS = posts.map(post -> new PostViewOutputDTO().convertFrom(post));
+
         model.addAttribute("posts", posts);
         model.addAttribute("publishCount", postService.getCountByStatus(PostStatusEnum.PUBLISHED.getCode()));
         model.addAttribute("draftCount", postService.getCountByStatus(PostStatusEnum.DRAFT.getCode()));
@@ -180,7 +183,7 @@ public class PostController extends BaseController {
                              @RequestParam("tagList") String tagList) {
         //old data
         final Post oldPost = postService.fetchById(post.getPostId()).orElse(new Post());
-        BeanUtils.updateProperties(oldPost,post);
+        BeanUtils.updateProperties(oldPost, post);
         post.setPostContent(MarkdownUtils.renderMarkdown(post.getPostContentMd()));
         if (null == post.getPostDate()) {
             post.setPostDate(new Date());
@@ -308,7 +311,7 @@ public class PostController extends BaseController {
         final String blogUrl = OPTIONS.get(BlogPropertiesEnum.BLOG_URL.getProp());
         final List<PostViewOutputDTO> posts = postService.findAll(PostTypeEnum.POST_TYPE_POST.getDesc())
                 .stream()
-                .map(post -> new PostViewOutputDTO().convertFrom(post))
+                .map(post -> (PostViewOutputDTO) new PostViewOutputDTO().convertFrom(post))
                 .collect(Collectors.toList());
         final StringBuilder urls = new StringBuilder();
         for (PostViewOutputDTO post : posts) {

src/main/java/cc/ryanc/halo/web/controller/api/ApiJournalController.java

@@ -1,12 +1,18 @@
 package cc.ryanc.halo.web.controller.api;
 
 import cc.ryanc.halo.model.domain.Post;
+import cc.ryanc.halo.model.domain.User;
 import cc.ryanc.halo.model.dto.PostDetailOutputDTO;
 import cc.ryanc.halo.model.params.JournalParam;
 import cc.ryanc.halo.service.PostService;
+import cc.ryanc.halo.service.UserService;
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.*;
 
+import javax.servlet.http.HttpSession;
+
+import static cc.ryanc.halo.model.support.HaloConst.USER_SESSION_KEY;
+
 /**
  * <pre>
  *     日志 API
@@ -21,8 +27,12 @@ public class ApiJournalController {
 
     private final PostService postService;
 
-    public ApiJournalController(PostService postService) {
+    private final UserService userService;
+
+    public ApiJournalController(PostService postService,
+                                UserService userService) {
         this.postService = postService;
+        this.userService = userService;
     }
 
     /**
@@ -33,9 +43,12 @@ public class ApiJournalController {
      */
     @PostMapping
     @ResponseStatus(HttpStatus.CREATED)
-    public PostDetailOutputDTO save(@RequestBody JournalParam journalParam) {
+    public PostDetailOutputDTO save(@RequestBody JournalParam journalParam, HttpSession session) {
+
+        User user = userService.findUser();
 
         Post post = journalParam.convertTo();
+        post.setUser(user);
 
         return new PostDetailOutputDTO().convertFrom(postService.create(post));
     }

src/test/java/cc/ryanc/halo/model/dto/base/InputConverterTest.java

@@ -0,0 +1,74 @@
+package cc.ryanc.halo.model.dto.base;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.junit.Test;
+
+import java.io.Serializable;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThat;
+
+public class InputConverterTest {
+
+    @Test
+    public void convertToTest() {
+        TestInputDTO inputDTO = new TestInputDTO("test_name");
+
+        TestDomain domain = inputDTO.convertTo();
+        assertThat(domain.getName(), equalTo("test_name"));
+        assertNull(domain.getAge());
+    }
+
+    @Test
+    public void updateTest() {
+        TestInputDTO inputDTO = new TestInputDTO("test_input_dto_name");
+
+        TestDomain domain = new TestDomain("test_domain_name", 10);
+
+        inputDTO.update(domain);
+
+        assertThat(domain.getName(), equalTo("test_input_dto_name"));
+        assertThat(domain.getAge(), equalTo(10));
+    }
+
+    @Test
+    public void subConvertToTest() {
+        SubTestInputDTO subTestInputDTO = new SubTestInputDTO();
+        subTestInputDTO.setName("test_name");
+        subTestInputDTO.setAge(10);
+
+        TestDomain domain = subTestInputDTO.convertTo();
+
+        assertThat(domain.getName(), equalTo("test_name"));
+        assertThat(domain.getAge(), equalTo(10));
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class TestDomain {
+
+        private String name;
+
+        private Integer age;
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class TestInputDTO implements InputConverter<TestDomain>, Serializable {
+
+        private String name;
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class SubTestInputDTO extends TestInputDTO {
+
+        private Integer age;
+    }
+}

src/test/java/cc/ryanc/halo/model/dto/base/OutputConverterTest.java

@@ -0,0 +1,61 @@
+package cc.ryanc.halo.model.dto.base;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.junit.Test;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Output converter test.
+ *
+ * @author johnniang
+ */
+public class OutputConverterTest {
+
+    @Test
+    public void convertFromTest() {
+        TestDomain domain = new TestDomain("test_domain_name", 10);
+
+        TestOutputDTO testOutputDTO = new TestOutputDTO().convertFrom(domain);
+
+        assertThat(testOutputDTO.getName(), equalTo("test_domain_name"));
+    }
+
+    @Test
+    public void convertFromSubTest() {
+        TestDomain domain = new TestDomain("test_domain_name", 10);
+
+        SubTestOutputDTO subTestOutputDTO = new SubTestOutputDTO().convertFrom(domain);
+
+        assertThat(subTestOutputDTO.getName(), equalTo("test_domain_name"));
+        assertThat(subTestOutputDTO.getAge(), equalTo(10));
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class TestDomain {
+
+        private String name;
+
+        private Integer age;
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class TestOutputDTO implements OutputConverter<TestOutputDTO, TestDomain> {
+
+        private String name;
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class SubTestOutputDTO extends TestOutputDTO {
+        private Integer age;
+    }
+}

src/test/java/cc/ryanc/halo/utils/ReflectionUtilsTest.java

@@ -0,0 +1,10 @@
+package cc.ryanc.halo.utils;
+
+/**
+ * Reflection utils test.
+ *
+ * @author johnniang
+ */
+public class ReflectionUtilsTest {
+
+}