feat: CategoryService, CategoryRepository

src/main/java/com/application/munera/repositories/CategoryRepository.java

@@ -0,0 +1,9 @@
+package com.application.munera.repositories;
+
+import com.application.munera.data.Category;
+import com.application.munera.data.Expense;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+
+public interface CategoryRepository extends JpaRepository<Category, Long>, JpaSpecificationExecutor<Expense> {
+}

src/main/java/com/application/munera/services/CategoryService.java

@@ -0,0 +1,40 @@
+package com.application.munera.services;
+
+import com.application.munera.data.Category;
+import com.application.munera.repositories.CategoryRepository;
+import jakarta.persistence.Cache;
+import org.springframework.stereotype.Service;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class CategoryService {
+
+    private final CategoryRepository categoryRepository;
+
+    public CategoryService(final CategoryRepository categoryRepository){
+        this.categoryRepository = categoryRepository;
+    }
+
+    public Optional<Category> get(Long id) {
+        return categoryRepository.findById(id);
+    }
+
+    public List<Category> findAll() {
+        return categoryRepository.findAll();
+    }
+
+    public Category update(Category category) {
+        return categoryRepository.save(category);
+    }
+
+    public void delete(Category category) {
+        categoryRepository.delete(category);
+    }
+
+    public Page<Category> list(Pageable pageable){
+        return categoryRepository.findAll(pageable);
+    }
+}

src/main/java/com/application/munera/services/ExpenseService.java

@@ -7,6 +7,7 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.domain.Specification;
 import org.springframework.stereotype.Service;
 
+import java.util.List;
 import java.util.Optional;
 
 @Service
@@ -22,6 +23,8 @@ public class ExpenseService {
         return repository.findById(id);
     }
 
+    public List<Expense> findAll() {return repository.findAll();}
+
     public Expense update(Expense entity) {
         return repository.save(entity);
     }

src/main/java/com/application/munera/views/expenses/ExpensesView.java

@@ -1,8 +1,7 @@
 package com.application.munera.views.expenses;
 
-import com.application.munera.data.Category;
 import com.application.munera.data.Expense;
-import com.application.munera.repositories.ExpenseRepository;
+import com.application.munera.services.ExpenseService;
 import com.application.munera.views.MainLayout;
 import com.vaadin.flow.component.grid.Grid;
 import com.vaadin.flow.component.orderedlayout.VerticalLayout;
@@ -17,12 +16,12 @@ import java.util.List;
 @PermitAll
 public class ExpensesView extends VerticalLayout {
 
-    private final ExpenseRepository expenseRepository;
+    private final ExpenseService expenseService;
     private final Grid<Expense> grid;
 
     @Autowired
-    public ExpensesView(ExpenseRepository expenseRepository) {
-        this.expenseRepository = expenseRepository;
+    public ExpensesView(ExpenseService expenseService) {
+        this.expenseService = expenseService;
         this.grid = new Grid<>(Expense.class);
         addClassName("expenses-view");
         setSizeFull();
@@ -40,7 +39,7 @@ public class ExpensesView extends VerticalLayout {
     }
 
     private void updateList() {
-        List<Expense> expenses = expenseRepository.findAll();
+        List<Expense> expenses = expenseService.findAll();
         grid.setItems(expenses);
     }
 }