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in-memory storage class

Deepika Sahu answered on January 2, 2023 Popularity 3/10 Helpfulness 1/10

answer in-memory storage class

in-memory storage class

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@Component
public class TodoDao implements Dao<Todo> {

    private List<Todo> todoList = new ArrayList<>();
    
    @Override
    public Optional<Todo> get(int id) {
        return Optional.ofNullable(todoList.get(id));
    }

    @Override
    public Collection<Todo> getAll() {
        return todoList.stream()
          .filter(Objects::nonNull)
          .collect(Collectors.collectingAndThen(Collectors.toList(), Collections::unmodifiableList));
    }

    @Override
    public int save(Todo todo) {
        todoList.add(todo);
        int index = todoList.size() - 1;
        todo.setId(index);
        return index;
    }

    @Override
    public void update(Todo todo) {
        todoList.set(todo.getId(), todo);
    }

    @Override
    public void delete(Todo todo) {
        todoList.set(todo.getId(), null);
    }
}
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Popularity 3/10 Helpfulness 1/10 Language java

Source: www.baeldung.com

Tags: class in-memory java storage

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Contributed on Jan 02 2023

Deepika Sahu

0 Answers Avg Quality 2/10

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