win.doyto.query.service.QueryService Maven / Gradle / Ivy
package win.doyto.query.service;
import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* QueryService
*
* @author f0rb
*/
public interface QueryService {
List query(Q query);
long count(Q query);
default E get(Q query) {
return CollectionUtil.first(query(query));
}
default List query(Q query, Function transfer) {
return query(query).stream().map(transfer).collect(Collectors.toList());
}
default PageList page(Q query, Function transfer) {
return new PageList<>(query(query, transfer), count(query));
}
List queryColumns(Q query, Class clazz, String... columns);
List queryColumn(Q query, Class clazz, String column);
default V getColumns(Q query, Class clazz, String... columns) {
return CollectionUtil.first(queryColumns(query, clazz, columns));
}
default V getColumn(Q query, Class clazz, String column) {
return CollectionUtil.first(queryColumns(query, clazz, column));
}
}