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package ${package}.utils;
import java.util.List;
import java.util.Optional;
public class OneOrListOf<T> {
private Optional<T> object;
private Optional<List<T>> objects;
private OneOrListOf(final T object, final List<T> objects) {
this.object = Optional.ofNullable(object);
this.objects = Optional.ofNullable(objects);
}
public static <T> OneOrListOf<T> oneOf(T object) {
return new OneOrListOf(object, null);
}
public static <T> OneOrListOf<T> listOf(List<T> objects) {
assert objects != null;
return new OneOrListOf(null, objects);
}
public boolean isOne() {
return this.getOneOptional().isPresent();
}
public boolean isList() {
return this.getListOptional().isPresent();
}
public Optional<T> getOneOptional() {
return this.object;
}
public Optional<List<T>> getListOptional() {
return this.objects;
}
public T getOne() {
return this.getOneOptional().get();
}
public List<T> getList() {
return this.getListOptional().get();
}
}
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