fix paper controller

src/main/java/ru/ulstu/file/service/FileService.java

@@ -9,6 +9,7 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Date;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 
@@ -29,6 +30,7 @@ public class FileService {
         File file = new File();
         file.setData(getTmpFile(tmpFileName));
         file.setName(getTmpFileName(tmpFileName));
+        file.setCreateDate(new Date());
         return fileRepository.save(file);
     }
 

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

@@ -24,7 +24,7 @@ public class PaperController {
     }
 
     @GetMapping("/papers")
-    public Response<List<Paper>> getPapers() {
+    public Response<List<PaperDto>> getPapers() {
         return new Response<>(paperService.findAll());
     }
 

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

@@ -13,6 +13,9 @@ public class PaperDto {
     private final String comment;
     private final Boolean locked;
     private final String tmpFileName;
+    private final Integer fileId;
+    private final String fileName;
+    private final Date fileCreateDate;
 
     @JsonCreator
     public PaperDto(@JsonProperty("title") String title,
@@ -29,6 +32,9 @@ public class PaperDto {
         this.comment = comment;
         this.locked = locked;
         this.tmpFileName = tmpFileName;
+        this.fileId = null;
+        this.fileName = null;
+        this.fileCreateDate = null;
     }
 
     public PaperDto(Paper paper) {
@@ -39,6 +45,9 @@ public class PaperDto {
         this.comment = paper.getComment();
         this.locked = paper.getLocked();
         this.tmpFileName = null;
+        this.fileId = paper.getFile() == null ? null : paper.getFile().getId();
+        this.fileName = paper.getFile() == null ? null : paper.getFile().getName();
+        this.fileCreateDate = paper.getFile() == null ? null : paper.getFile().getCreateDate();
     }
 
     public String getTitle() {
@@ -68,4 +77,16 @@ public class PaperDto {
     public String getTmpFileName() {
         return tmpFileName;
     }
+
+    public Integer getFileId() {
+        return fileId;
+    }
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public Date getFileCreateDate() {
+        return fileCreateDate;
+    }
 }

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

@@ -12,6 +12,8 @@ import java.io.IOException;
 import java.util.Arrays;
 import java.util.List;
 
+import static ru.ulstu.core.util.StreamApiUtils.convert;
+
 @Service
 public class PaperService {
 
@@ -24,8 +26,8 @@ public class PaperService {
         this.fileService = fileService;
     }
 
-    public List<Paper> findAll() {
+    public List<PaperDto> findAll() {
-        return paperRepository.findAll();
+        return convert(paperRepository.findAll(), PaperDto::new);
     }
 
     @Transactional