ERROR occured - checking whether the file was already saved

src/main/java/com/dre0059/articleprocessor/controller/FileUploadController.java

 package com.dre0059.articleprocessor.controller;
 
 import com.dre0059.articleprocessor.GrobidClient;
-import com.dre0059.articleprocessor.model.DocumentMetadata;
 import com.dre0059.articleprocessor.service.HeaderService;
 import com.dre0059.articleprocessor.service.MetadataParser;
 import com.dre0059.articleprocessor.repository.DocumentRepository;

src/main/java/com/dre0059/articleprocessor/model/Author.java

@@ -13,24 +13,24 @@ public class Author {
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
-    private String name;
-    private String surname;
+    private String firstName;
+    private String lastName;
 
     @ManyToMany(mappedBy = "authors")
-    private List<Dokument> documents = new ArrayList<Dokument>();
+    private List<Dokument> documents = new ArrayList<>();
 
     public Author(){}
-    public Author(String name, String surname) {
-        this.name = name;
-        this.surname = surname;
+    public Author(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
     }
 
     public Long getId() { return id; }
-    public String getName() { return name; }
-    public String getSurname() { return surname; }
+    public String getFirstname() { return firstName; }
+    public String getLastname() { return lastName; }
     public List<Dokument> getDocuments() { return documents; }
 
-    public void setName(String name) { this.name = name; }
-    public void setSurname(String surname) { this.surname = surname; }
+    public void setFirstname(String name) { this.firstName = name; }
+    public void setLastname(String surname) { this.lastName = surname; }
     public void setDocuments(List<Dokument> documents) { this.documents = documents; }
 }

src/main/java/com/dre0059/articleprocessor/model/DocumentMetadata.java

-package com.dre0059.articleprocessor.model;
-
-import jakarta.persistence.*;
-
-import java.util.ArrayList;
-import java.util.List;
-
-@Entity // DBS table
-@Table (name = "DOCUMENT_METADATA", uniqueConstraints = @UniqueConstraint(columnNames = "title"))
-public class DocumentMetadata {
-    @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY) // ID is generated automatically
-    private Long id;
-
-    private String title;
-
-    @ElementCollection  // pomocna tabulka authors
-    private List<String> authors = new ArrayList<>();
-
-    // needed for Hibernate for right instances in DBS
-    public DocumentMetadata() {}
-
-    public DocumentMetadata(String title, List<String> authors) {
-        this.title = title;
-        this.authors = authors;
-    }
-
-    public Long getId(){
-        return id;
-    }
-    public String getTitle(){
-        return title;
-    }
-    public List<String> getAuthors(){
-        return authors;
-    }
-}

src/main/java/com/dre0059/articleprocessor/model/Dokument.java

 package com.dre0059.articleprocessor.model;
 
 import jakarta.persistence.*;
+import org.hibernate.annotations.Cascade;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -20,6 +21,7 @@ public class Dokument {
     private Integer publicationYear;
     private String doi;
 
+    // @Lob for huge text
     //@Column(name = "abstractText", columnDefinition = "TEXT")
     //private String abstractText;
 
@@ -36,6 +38,7 @@ public class Dokument {
             inverseJoinColumns = @JoinColumn(name = "ID_author")
     )
 
+    @Cascade(org.hibernate.annotations.CascadeType.ALL)
     private List<Author> authors = new ArrayList<>();
 
     public Dokument() {}
@@ -62,4 +65,24 @@ public class Dokument {
 
     public void setAuthors(List<Author> authors) { this.authors = authors; }
     public void setTitle(String title) { this.title = title; }
+
+    public void setPublicationYear(Integer publicationYear) {
+        this.publicationYear = publicationYear;
+    }
+
+    public void setDoi(String doi) {
+        this.doi = doi;
+    }
+
+    public void setPages(Integer pages) {
+        this.pages = pages;
+    }
+
+    public void setPublisher(String publisher) {
+        this.publisher = publisher;
+    }
+
+    public void setReferences(List<Reference> references) {
+        this.references = references;
+    }
 }

src/main/java/com/dre0059/articleprocessor/repository/AuthorRepository.java

@@ -2,11 +2,16 @@ package com.dre0059.articleprocessor.repository;
 
 import com.dre0059.articleprocessor.model.Author;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
 
 @Repository
 public interface AuthorRepository extends JpaRepository<Author, Long> {
-    Optional<Author> findByNameAndSurname(String name, String surname);
+
+    @Query("SELECT a FROM Author a WHERE a.lastName = :lastName AND SUBSTRING(a.firstName, 1, 1) = SUBSTRING(:firstName, 1, 1)")
+    Optional<Author> findByFullName(@Param("lastName") String lastName, @Param("firstName") String firstName);
+
 }

src/main/java/com/dre0059/articleprocessor/repository/DocumentRepository.java

@@ -3,12 +3,17 @@ package com.dre0059.articleprocessor.repository;
 import com.dre0059.articleprocessor.model.*;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
 import java.util.Optional;
 
 // uklada extrahovane data
 @Repository
 public interface DocumentRepository extends JpaRepository<Dokument, Long> {
-    //Optional<Dokument> findByTitleAndAuthorsSurname(String title, String surname);
+
+    @Query("SELECT COUNT(d) > 0 FROM Dokument d JOIN d.authors a WHERE d.title = :title AND a IN :authors")
+    boolean existsByTitleAndAuthorsIn(@Param("title") String title, @Param("authors") List<Author> authors);
 }

src/main/java/com/dre0059/articleprocessor/service/HeaderService.java

@@ -7,8 +7,10 @@ import com.dre0059.articleprocessor.repository.DocumentRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import javax.swing.text.html.Option;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Optional;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -43,7 +45,7 @@ public class HeaderService {
         this.publisher = this.parseHeaderFields(header, "publisher");
 
         if(this.parseHeaderFields(header, "year").equals("Not found")){
-            this.year = -1;
+            this.year = 0;
         }
         if(this.parseHeaderFields(header, "pages").equals("Not found")){
             this.pages = 0;
@@ -54,10 +56,15 @@ public class HeaderService {
             authorList = this.saveAuthorNameAndSurname(this.author);
         }
 
-        for(Author author : authorList){
-            authorRepository.save(author);
+        authorRepository.saveAll(authorList);
+
+        // check duplicity of the document
+        if(documentRepository.existsByTitleAndAuthorsIn(title, authorList)){
+            System.out.println("Document with this title and authors already exist");
+            return;
         }
 
+
         Dokument dokument = new Dokument(title, year, doi, pages, publisher);
         dokument.setAuthors(authorList);
 
@@ -88,6 +95,7 @@ public class HeaderService {
             String[] nameParts = fullName.split(",");
 
             String firstName;
+            String lastName = nameParts[1];
             if(nameParts.length > 2){
                 // have two names
                 firstName = nameParts[0] + " " + nameParts[2];
@@ -95,7 +103,16 @@ public class HeaderService {
                 firstName = nameParts[0];
             }
 
-            authors.add(new Author(nameParts[1], firstName));
+            // check if author already exists
+            Optional<Author> existingAuthor = authorRepository.findByFullName(lastName, firstName);
+            if (existingAuthor.isPresent()) {
+                authors.add(existingAuthor.get());
+            } else {
+                Author newAuthor = new Author(lastName, firstName);
+                authors.add(newAuthor);
+            }
+
+            //authors.add(new Author(lastName, firstName));
         }
 
         return authors;

src/main/java/com/dre0059/articleprocessor/service/TEIparser.java

@@ -40,7 +40,7 @@ public class TEIparser {
                 referencedDocument.setTitle(title);
 
                 Author author = new Author();
-                author.setSurname(authorSurname);
+                author.setLastname(authorSurname);
                 referencedDocument.setAuthors(List.of(author));
 
                 Dokument savedReferencedDocument = documentService.saveDocument(referencedDocument);