92 lines
2.5 KiB
Java
Executable File
92 lines
2.5 KiB
Java
Executable File
package com.plannaplan.services;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Objects;
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import java.util.Optional;
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import java.util.stream.Collectors;
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import java.util.function.Function;
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import com.plannaplan.entities.Groups;
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import com.plannaplan.repositories.GroupRepository;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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/**
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* Service of GroupService which can find(optional), get(By Course, Groups
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* Ammount, Group By Id, find Not Existing Group), save, delete group.
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*/
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@Service
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public class GroupService {
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@Autowired
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private GroupRepository repo;
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public GroupService() {
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}
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public Optional<Groups> find(int time, int capacity, String room) {
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return this.repo.find(time, room, capacity);
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}
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public List<Groups> getGroupsByCourse(Long id) {
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return this.repo.getByCourse(id);
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}
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public Groups save(Groups group) {
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return this.repo.save(group);
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}
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public void delete(Groups groups) {
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this.repo.delete(groups);
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}
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public int getGroupsAmmount() {
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return (int) this.repo.count();
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}
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public Optional<Groups> getGroupById(Long id) {
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return this.repo.findById(id);
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}
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public Optional<Long> findNotExistingGroup(List<Long> ids) {
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for (Long oneId : ids) {
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if (this.repo.existsById(oneId) == false) {
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return Optional.of(oneId);
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}
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}
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return Optional.empty();
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}
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/**
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*
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* @param groups list of groups you want to get taken places ammount
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* @return HashMap<Long, Integer> where Long is group id and Integer is how many
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* places in gorup is already taken
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*/
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public HashMap<Long, Integer> getTakenPlaces(List<Groups> groups) {
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HashMap<Long, Integer> response = new HashMap<>();
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if (groups.size() == 0) {
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return response;
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}
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List<Object[]> respoonses = this.repo
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.getAssignedAmounts(groups.stream().filter(Objects::nonNull).map(new Function<Groups, Long>() {
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@Override
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public Long apply(Groups p) {
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final Long id = p.getId();
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response.put(id, 0);
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return id;
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}
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}).collect(Collectors.toList()));
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for (Object[] element : respoonses) {
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response.put(((Groups) element[0]).getId(), ((Long) element[1]).intValue());
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}
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return response;
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}
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} |