package adql.query.operand;
/*
* This file is part of ADQLLibrary.
*
* ADQLLibrary is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* ADQLLibrary is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with ADQLLibrary. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2014 - Astronomisches Rechen Institut (ARI)
*/
import adql.query.operand.function.UserDefinedFunction;
/**
* <p>Operand whose the type can not be known at the parsing time.
* A post-parsing step with column metadata is needed to resolved their types.</p>
*
* <p><i>Note:
* For the moment, only two operands are concerned: columns ({@link ADQLColumn}) and user defined functions ({@link UserDefinedFunction}).
* </i></p>
*
* @author Grégory Mantelet (ARI)
* @version 1.3 (10/2014)
* @since 1.3
*/
public interface UnknownType extends ADQLOperand {
/**
* Get the type expected by the syntactic parser according to the context.
*
* @return Expected type: 'n' or 'N' for numeric, 's' or 'S' for string, 'g' or 'G' for geometry.
*/
public char getExpectedType();
/**
* Set the type expected for this operand.
*
* @param c Expected type: 'n' or 'N' for numeric, 's' or 'S' for string, 'g' or 'G' for geometry.
*/
public void setExpectedType(final char c);
}