src/main/java/com/primefactorsolutions/repositories/TimeOffRequestRepository.java

@@ -1,11 +1,15 @@
 package com.primefactorsolutions.repositories;
 
 import com.primefactorsolutions.model.TimeOffRequest;
+import com.primefactorsolutions.model.TimeOffRequestType;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 import java.util.List;
 import java.util.UUID;
 
 public interface TimeOffRequestRepository extends JpaRepository<TimeOffRequest, UUID> {
-    List<TimeOffRequest> findByEmployee_Id(UUID id_employee);
+    List<TimeOffRequest> findByEmployeeId(UUID idEmployee);
+    List<TimeOffRequest> findByTeamId(UUID idTeam);
+    List<TimeOffRequest> findByCategory(TimeOffRequestType category);
+    List<TimeOffRequest> findByState(TimeOffRequest.Status state);
 }

src/main/java/com/primefactorsolutions/service/TimeOffRequestService.java

@@ -3,14 +3,11 @@ package com.primefactorsolutions.service;
 import com.primefactorsolutions.model.*;
 import com.primefactorsolutions.repositories.TimeOffRequestRepository;
 import lombok.AllArgsConstructor;
-import org.apache.commons.beanutils.BeanComparator;
 import org.springframework.stereotype.Service;
 
-import java.util.Collections;
 import java.util.List;
 import java.util.UUID;
 import java.util.Optional;
-import java.util.stream.Collectors;
 
 @Service
 @AllArgsConstructor
@@ -25,68 +22,28 @@ public class TimeOffRequestService {
         timeOffRequestRepository.deleteById(id);
     }
 
-    public List<TimeOffRequest> getAllTimeOffRequests() {
+    public List<TimeOffRequest> findAllTimeOffRequests() {
         return timeOffRequestRepository.findAll();
     }
 
-    public TimeOffRequest getTimeOffRequest(final UUID id) {
+    public TimeOffRequest findTimeOffRequest(final UUID id) {
         Optional<TimeOffRequest> timeOffRequest = timeOffRequestRepository.findById(id);
         return timeOffRequest.orElse(null);
     }
 
-    public List<TimeOffRequest> findTimeOffRequests(
+    public List<TimeOffRequest> findRequestsByEmployeeId(final UUID idEmployee) {
-            final int start, final int pageSize, final String sortProperty, final boolean asc) {
+        return timeOffRequestRepository.findByEmployeeId(idEmployee);
-        List<TimeOffRequest> timeOffRequests = timeOffRequestRepository.findAll();
-
-        int end = Math.min(start + pageSize, timeOffRequests.size());
-        timeOffRequests.sort(new BeanComparator<>(sortProperty));
-
-        if (!asc) {
-            Collections.reverse(timeOffRequests);
     }
 
-        return timeOffRequests.subList(start, end);
+    public List<TimeOffRequest> findRequestsByTeamId(final UUID idTeam) {
+        return timeOffRequestRepository.findByTeamId(idTeam);
     }
 
-    public List<TimeOffRequest> findTimeOffRequests(final int start, final int pageSize) {
+    public List<TimeOffRequest> findRequestsByCategory(final TimeOffRequestType category) {
-        List<TimeOffRequest> timeOffRequests = timeOffRequestRepository.findAll();
+        return timeOffRequestRepository.findByCategory(category);
-
-        int end = Math.min(start + pageSize, timeOffRequests.size());
-        return timeOffRequests.subList(start, end);
     }
 
-    public List<TimeOffRequest> findTimeOffRequestBy(final Employee employee,
+    public List<TimeOffRequest> findRequestsByState(final TimeOffRequest.Status state) {
-                                                     final Team team,
+        return timeOffRequestRepository.findByState(state);
-                                                     final TimeOffRequestType category,
-                                                     final TimeOffRequest.Status state,
-                                                     final int start,
-                                                     final int pageSize) {
-        List<TimeOffRequest> timeOffRequests = timeOffRequestRepository.findAll();
-        if (employee != null && !"ALL".equals(employee.getFirstName())) {
-            timeOffRequests = timeOffRequests.stream()
-                    .filter(req -> req.getEmployee().equals(employee))
-                    .collect(Collectors.toList());
-        }
-        if (team != null && !"ALL".equals(team.getName())) {
-            timeOffRequests = timeOffRequests.stream()
-                    .filter(req -> req.getTeam().equals(team))
-                    .collect(Collectors.toList());
-        }
-        if (category != null && !"ALL".equals(category.name())) {
-            timeOffRequests = timeOffRequests.stream()
-                    .filter(req -> req.getCategory().equals(category))
-                    .collect(Collectors.toList());
-        }
-        if (state != null && !"ALL".equals(state.name())) {
-            timeOffRequests = timeOffRequests.stream()
-                    .filter(req -> req.getState().equals(state))
-                    .collect(Collectors.toList());
-        }
-        int end = Math.min(start + pageSize, timeOffRequests.size());
-        return timeOffRequests.subList(start, end);
-    }
-
-    public List<TimeOffRequest> findRequestsByEmployeeId(UUID id_employee) {
-        return timeOffRequestRepository.findByEmployee_Id(id_employee);
     }
 }

src/main/java/com/primefactorsolutions/views/RequestView.java

@@ -7,22 +7,19 @@ import com.primefactorsolutions.service.EmployeeService;
 import com.primefactorsolutions.service.TimeOffRequestService;
 import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.combobox.ComboBox;
-import com.vaadin.flow.component.grid.GridSortOrder;
+import com.vaadin.flow.component.grid.Grid;
 import com.vaadin.flow.component.html.Div;
 import com.vaadin.flow.component.html.H3;
 import com.vaadin.flow.component.html.Span;
 import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
 import com.vaadin.flow.component.orderedlayout.VerticalLayout;
-import com.vaadin.flow.data.provider.SortDirection;
 import com.vaadin.flow.router.BeforeEvent;
 import com.vaadin.flow.router.HasUrlParameter;
 import com.vaadin.flow.router.PageTitle;
 import com.vaadin.flow.router.Route;
 import com.vaadin.flow.spring.annotation.SpringComponent;
 import jakarta.annotation.security.PermitAll;
-import org.apache.commons.beanutils.BeanComparator;
 import org.springframework.context.annotation.Scope;
-import org.vaadin.firitin.components.grid.PagingGrid;
 
 import java.util.Collections;
 import java.util.List;
@@ -38,21 +35,22 @@ public class RequestView extends Div implements HasUrlParameter<String> {
 
     private final TimeOffRequestService requestService;
     private final EmployeeService employeeService;
-    private final PagingGrid<TimeOffRequest> requestGrid = new PagingGrid<>(TimeOffRequest.class);
+    private final Grid<TimeOffRequest> requestGrid = new Grid<>(TimeOffRequest.class);
-    private List<TimeOffRequest> requests;
+    private List<TimeOffRequest> requests = Collections.emptyList();
     private ComboBox<TimeOffRequestType> categoryFilter;
     private ComboBox<TimeOffRequest.Status> stateFilter;
     private UUID employeeId;
 
-    public RequestView(TimeOffRequestService requestService, EmployeeService employeeService) {
+    public RequestView(final TimeOffRequestService requestService, final EmployeeService employeeService) {
         this.requestService = requestService;
         this.employeeService = employeeService;
-        this.requests = Collections.emptyList();
+        initializeView();
+    }
+
+    private void initializeView() {
         setupFilters();
         setupGrid();
-        add(requestGrid);
+        add(requestGrid, createSummaryLayout(), createActionButtons());
-        add(createSummaryLayout());
-        add(createActionButtons());
         refreshRequestGrid(null, null);
     }
 
@@ -89,16 +87,18 @@ public class RequestView extends Div implements HasUrlParameter<String> {
                 "daysToBeTake",
                 "daysBalance"
         );
+        requestGrid.setAllRowsVisible(true);
     }
 
     private VerticalLayout createSummaryLayout() {
         int totalVacations = 15;
         int totalTimeOff = 2;
         int totalAvailableDays = totalVacations + totalTimeOff;
-        Span holidaysLabel = new Span("TOTAL HOLIDAYS: " + totalVacations);
+        return new VerticalLayout(
-        Span timeOffLabel = new Span("TOTAL TIME OFF: " + totalTimeOff);
+                new Span("TOTAL HOLIDAYS: " + totalVacations),
-        Span availableDaysLabel = new Span("TOTAL AVAILABLE DAYS: " + totalAvailableDays);
+                new Span("TOTAL TIME OFF: " + totalTimeOff),
-        return new VerticalLayout(holidaysLabel, timeOffLabel, availableDaysLabel);
+                new Span("TOTAL AVAILABLE DAYS: " + totalAvailableDays)
+        );
     }
 
     private HorizontalLayout createActionButtons() {
@@ -111,47 +111,21 @@ public class RequestView extends Div implements HasUrlParameter<String> {
 
     private void navigateToRequestsListView() {
         getUI().ifPresent(ui -> ui.navigate(RequestsListView.class));
-
     }
 
-    private void refreshRequestGrid(final TimeOffRequestType category,
+    private void refreshRequestGrid(final TimeOffRequestType category, final TimeOffRequest.Status state) {
-                                    final TimeOffRequest.Status state) {
+        List<TimeOffRequest> filteredRequests = allFiltersAreNull(category, state)
-        requestGrid.setPagingDataProvider((page, pageSize) -> {
+                ? requestService.findRequestsByEmployeeId(employeeId)
-            if (allFiltersAreNull(category, state)) {
+                : fetchFilteredTimeOffRequests(category, state);
-                return fetchTimeOffRequests((int) page, pageSize);
+        requestGrid.setItems(filteredRequests);
-            } else {
-                return fetchFilteredTimeOffRequests((int) page, pageSize,category, state);
-            }
-        });
-        requestGrid.getDataProvider().refreshAll();
     }
 
-    private boolean allFiltersAreNull(TimeOffRequestType category, TimeOffRequest.Status state) {
+    private boolean allFiltersAreNull(final TimeOffRequestType category, final TimeOffRequest.Status state) {
         return category == null && state == null;
     }
 
-    private List<TimeOffRequest> fetchTimeOffRequests(int page, int pageSize) {
+    private List<TimeOffRequest> fetchFilteredTimeOffRequests(final TimeOffRequestType category,
-        int start = page * pageSize;
+                                                              final TimeOffRequest.Status state) {
-        if (requestGrid.getSortOrder().isEmpty()) {
-            int end = Math.min(start + pageSize, requests.size());
-            return requests.subList(start, end);
-        } else {
-            return fetchSortedTimeOffRequests(start, pageSize);
-        }
-    }
-
-    private List<TimeOffRequest> fetchSortedTimeOffRequests(int start, int pageSize) {
-        GridSortOrder<TimeOffRequest> sortOrder = requestGrid.getSortOrder().getFirst();
-        int end = Math.min(start + pageSize, requests.size());
-        requests.sort(new BeanComparator<>(sortOrder.getSorted().getKey()));
-
-        if (sortOrder.getDirection() != SortDirection.ASCENDING) {
-            Collections.reverse(requests);
-        }
-        return requests.subList(start, end);
-    }
-
-    private List<TimeOffRequest> fetchFilteredTimeOffRequests(int page, int pageSize, TimeOffRequestType category, TimeOffRequest.Status state) {
         requests = requestService.findRequestsByEmployeeId(employeeId);
         if (category != null && !"ALL".equals(category.name())) {
             requests = requests.stream()
@@ -163,31 +137,20 @@ public class RequestView extends Div implements HasUrlParameter<String> {
                     .filter(req -> req.getState().equals(state))
                     .collect(Collectors.toList());
         }
-        int end = Math.min(page + pageSize, requests.size());
+        return requests;
-        return requests.subList(page, end);
     }
 
     @Override
-    public void setParameter(BeforeEvent event, String parameter) {
+    public void setParameter(final BeforeEvent event, final String parameter) {
-        try {
         employeeId = UUID.fromString(parameter);
         Employee employee = employeeService.getEmployee(employeeId);
-
-            String employeeName = employee.getFirstName() + " " + employee.getLastName();
-            String employeeTeam = employee.getTeam();
-            setViewTitle(employeeName, employeeTeam);
-
         requests = requestService.findRequestsByEmployeeId(employeeId);
+        setViewTitle(employee.getFirstName() + " " + employee.getLastName(), employee.getTeam());
         requestGrid.setItems(requests);
-        } catch (IllegalArgumentException e) {
-            requestGrid.setItems();
-        }
     }
 
-    private void setViewTitle(String employeeName, String employeeTeam) {
+    private void setViewTitle(final String employeeName, final String employeeTeam) {
-        H3 employeeTitle = new H3("Name: " + employeeName);
+        addComponentAsFirst(new H3("Name: " + employeeName));
-        H3 teamTitle = new H3("Team: " + employeeTeam);
+        addComponentAtIndex(1, new H3("Team: " + employeeTeam));
-        addComponentAsFirst(employeeTitle);
-        addComponentAtIndex(1, teamTitle);
     }
 }

src/main/java/com/primefactorsolutions/views/RequestsListView.java

@@ -6,12 +6,10 @@ import com.primefactorsolutions.service.TeamService;
 import com.primefactorsolutions.service.TimeOffRequestService;
 import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.combobox.ComboBox;
-import com.vaadin.flow.component.grid.GridSortOrder;
 import com.vaadin.flow.component.html.Main;
 import com.vaadin.flow.component.html.Span;
 import com.vaadin.flow.component.notification.Notification;
 import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
-import com.vaadin.flow.data.provider.SortDirection;
 import com.vaadin.flow.router.PageTitle;
 import com.vaadin.flow.router.Route;
 import com.vaadin.flow.spring.annotation.SpringComponent;
@@ -19,8 +17,10 @@ import jakarta.annotation.security.PermitAll;
 import org.springframework.context.annotation.Scope;
 import org.vaadin.firitin.components.grid.PagingGrid;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.UUID;
+import java.util.stream.Collectors;
 
 @SpringComponent
 @Scope("prototype")
@@ -32,7 +32,8 @@ public class RequestsListView extends Main {
     private final TimeOffRequestService requestService;
     private final EmployeeService employeeService;
     private final TeamService teamService;
-    private final PagingGrid<TimeOffRequest> requestGrid;
+    private final PagingGrid<TimeOffRequest> requestGrid = new PagingGrid<>(TimeOffRequest.class);
+    private List<TimeOffRequest> requests = Collections.emptyList();
     private ComboBox<Employee> employeeFilter;
     private ComboBox<Team> teamFilter;
     private ComboBox<TimeOffRequestType> categoryFilter;
@@ -45,7 +46,7 @@ public class RequestsListView extends Main {
         this.requestService = requestService;
         this.employeeService = employeeService;
         this.teamService = teamService;
-        this.requestGrid = new PagingGrid<>(TimeOffRequest.class);
+        this.requests = requestService.findAllTimeOffRequests();
         initializeView();
         refreshRequestGrid(null, null, null, null);
     }
@@ -105,11 +106,14 @@ public class RequestsListView extends Main {
                                     final Team team,
                                     final TimeOffRequestType category,
                                     final TimeOffRequest.Status state) {
+
         requestGrid.setPagingDataProvider((page, pageSize) -> {
+            requests = requestService.findAllTimeOffRequests();
+            int start = (int) (page * requestGrid.getPageSize());
             if (allFiltersAreNull(employee, team, category, state)) {
-                return fetchTimeOffRequests((int) page, pageSize);
+                return fetchTimeOffRequests(start, pageSize);
             } else {
-                return fetchFilteredTimeOffRequests((int) page, pageSize, employee, team, category, state);
+                return fetchFilteredTimeOffRequests(start, pageSize, employee, team,  category, state);
             }
         });
         requestGrid.getDataProvider().refreshAll();
@@ -122,33 +126,47 @@ public class RequestsListView extends Main {
         return employee == null && team == null && category == null && state == null;
     }
 
-    private List<TimeOffRequest> fetchTimeOffRequests(final int page, final int pageSize) {
+    private List<TimeOffRequest> fetchTimeOffRequests(final int start, final int pageSize) {
-        int start = page * pageSize;
+        int end = start + pageSize;
-        if (requestGrid.getSortOrder().isEmpty()) {
+        if (end > requests.size()) {
-            return requestService.findTimeOffRequests(start, pageSize);
+            end = requests.size();
-        } else {
-            return fetchSortedTimeOffRequests(start, pageSize);
         }
+        return requests.subList(start, end);
     }
 
-    private List<TimeOffRequest> fetchSortedTimeOffRequests(final int start, final int pageSize) {
+    private List<TimeOffRequest> fetchFilteredTimeOffRequests(final int start,
-        GridSortOrder<TimeOffRequest> sortOrder = requestGrid.getSortOrder().getFirst();
-        return requestService.findTimeOffRequests(
-                start,
-                pageSize,
-                sortOrder.getSorted().getKey(),
-                sortOrder.getDirection() == SortDirection.ASCENDING
-        );
-    }
-
-    private List<TimeOffRequest> fetchFilteredTimeOffRequests(final int page,
                                                               final int pageSize,
                                                               final Employee employee,
                                                               final Team team,
                                                               final TimeOffRequestType category,
                                                               final TimeOffRequest.Status state) {
-        return requestService.findTimeOffRequestBy(employee, team, category, state, page, pageSize);
+        if (employee != null && !"ALL".equals(employee.getFirstName())) {
+            requests = requests.stream()
+                    .filter(request -> request.getEmployee().getId().equals(employee.getId()))
+                    .collect(Collectors.toList());
         }
+        if (team != null && !"ALL".equals(team.getName())) {
+            requests = requests.stream()
+                    .filter(request -> request.getTeam().getId().equals(team.getId()))
+                    .collect(Collectors.toList());
+        }
+        if (category != null && !"ALL".equals(category.name())) {
+            requests = requests.stream()
+                    .filter(request -> request.getCategory().equals(category))
+                    .collect(Collectors.toList());
+        }
+        if (state != null && !"ALL".equals(state.name())) {
+            requests = requests.stream()
+                    .filter(request -> request.getState().equals(state))
+                    .collect(Collectors.toList());
+        }
+        int end = start + pageSize;
+        if (end > requests.size()) {
+            end = requests.size();
+        }
+        return requests.subList(start, end);
+    }
+
 
     private Span createEmployeeSpan(final TimeOffRequest timeOffRequest) {
         Employee employee = timeOffRequest.getEmployee();
@@ -249,7 +267,7 @@ public class RequestsListView extends Main {
         getUI().ifPresent(ui -> ui.navigate(MainView.class));
     }
 
-    private void navigateToTimeOffRequestView(final UUID id_employee) {
+    private void navigateToTimeOffRequestView(final UUID idEmployee) {
-        getUI().ifPresent(ui -> ui.navigate("requests/" + id_employee.toString()));
+        getUI().ifPresent(ui -> ui.navigate("requests/" + idEmployee.toString()));
     }
 }