hateoas showcase

build.gradle

@@ -105,6 +105,8 @@ dependencies {
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-jetty'
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa'
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-thymeleaf'
+    compile group: 'org.springframework.boot', name: 'spring-boot-starter-hateoas', version: '2.2.1.RELEASE'
+
     compile group: 'nz.net.ultraq.thymeleaf', name: 'thymeleaf-layout-dialect'
     compile group: 'org.thymeleaf.extras', name: 'thymeleaf-extras-springsecurity5'
     compile group: 'com.fasterxml.jackson.module', name: 'jackson-module-afterburner'
@@ -132,4 +134,4 @@ dependencies {
     testCompile group: 'org.seleniumhq.selenium', name: 'selenium-support', version: '3.3.1'
     //testCompile group: 'com.google.guava', name: 'guava', version: '21.0'
     testCompile group: 'org.mockito', name: 'mockito-all', version: '1.10.19'
-}
+}

src/main/java/ru/ulstu/paper/controller/PaperRestController.java

@@ -1,5 +1,8 @@
 package ru.ulstu.paper.controller;
 
+import org.springframework.hateoas.Link;
+import org.springframework.hateoas.Resource;
+import org.springframework.hateoas.Resources;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -20,6 +23,8 @@ import javax.validation.Valid;
 import java.io.IOException;
 import java.util.List;
 
+import static org.springframework.hateoas.core.DummyInvocationUtils.methodOn;
+import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;
 import static ru.ulstu.paper.controller.PaperRestController.URL;
 
 @RestController
@@ -38,6 +43,27 @@ public class PaperRestController {
         return new Response<>(paperService.findAllDto());
     }
 
+    @GetMapping("/with-resources")
+    public Resources<List<PaperDto>> getPapersWithResources() {
+        List<PaperDto> paperDtos = paperService.findAllDto();
+        for (final PaperDto paperDto : paperDtos) {
+            final Link selfLink = linkTo(
+                    methodOn(PaperRestController.class).getPaperWithResources(paperDto.getEntityId())).withSelfRel();
+            paperDto.add(selfLink);
+        }
+
+        Link link = linkTo(PaperRestController.class).withSelfRel();
+        Resources<List<PaperDto>> result = new Resources(paperDtos, link);
+        return result;
+    }
+
+    @GetMapping("/with-resources/{paper-id}")
+    public Resource<PaperDto> getPaperWithResources(@PathVariable("paper-id") Integer paperId) {
+        Link link = linkTo(methodOn(PaperRestController.class).getPapersWithResources()).withSelfRel();
+        Resource<PaperDto> result = new Resource(paperService.findById(paperId), link);
+        return result;
+    }
+
     @GetMapping("/{paper-id}")
     public Response<PaperDto> getPaper(@PathVariable("paper-id") Integer paperId) {
         return new Response<>(paperService.findById(paperId));

src/main/java/ru/ulstu/paper/model/PaperDto.java

@@ -3,6 +3,7 @@ package ru.ulstu.paper.model;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import org.apache.commons.lang3.StringUtils;
+import org.springframework.hateoas.ResourceSupport;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.file.model.FileDataDto;
 import ru.ulstu.user.model.UserDto;
@@ -17,10 +18,10 @@ import java.util.stream.Collectors;
 
 import static ru.ulstu.core.util.StreamApiUtils.convert;
 
-public class PaperDto {
+public class PaperDto extends ResourceSupport {
     private final static int MAX_AUTHORS_LENGTH = 60;
 
-    private Integer id;
+    private Integer entityId;
     @NotEmpty
     @Size(min = 3, max = 254)
     private String title;
@@ -46,7 +47,7 @@ public class PaperDto {
     }
 
     @JsonCreator
-    public PaperDto(@JsonProperty("id") Integer id,
+    public PaperDto(@JsonProperty("entityId") Integer entityId,
                     @JsonProperty("title") String title,
                     @JsonProperty("status") Paper.PaperStatus status,
                     @JsonProperty("type") Paper.PaperType type,
@@ -62,7 +63,7 @@ public class PaperDto {
                     @JsonProperty("authors") Set<UserDto> authors,
                     @JsonProperty("references") List<ReferenceDto> references,
                     @JsonProperty("formatStandard") ReferenceDto.FormatStandard formatStandard) {
-        this.id = id;
+        this.entityId = entityId;
         this.title = title;
         this.status = status;
         this.type = type;
@@ -80,7 +81,7 @@ public class PaperDto {
     }
 
     public PaperDto(Paper paper) {
-        this.id = paper.getId();
+        this.entityId = paper.getId();
         this.title = paper.getTitle();
         this.status = paper.getStatus();
         this.type = paper.getType();
@@ -97,12 +98,12 @@ public class PaperDto {
         this.references = convert(paper.getReferences(), ReferenceDto::new);
     }
 
-    public Integer getId() {
-        return id;
+    public Integer getEntityId() {
+        return entityId;
     }
 
     public void setId(Integer id) {
-        this.id = id;
+        this.entityId = id;
     }
 
     public String getTitle() {

src/main/java/ru/ulstu/paper/service/PaperService.java

@@ -176,7 +176,7 @@ public class PaperService {
 
     @Transactional
     public Integer update(PaperDto paperDto) throws IOException {
-        Paper paper = paperRepository.getOne(paperDto.getId());
+        Paper paper = paperRepository.getOne(paperDto.getEntityId());
         Paper.PaperStatus oldStatus = paper.getStatus();
         Set<User> oldAuthors = new HashSet<>(paper.getAuthors());