package adql.parser;
/*
* 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 2012-2013 - UDS/Centre de Données astronomiques de Strasbourg (CDS),
* Astronomisches Rechen Institut (ARI)
*/
import adql.db.DBChecker;
import adql.query.ADQLQuery;
/**
* <p>Used at the end of the parsing of each ADQL query by the {@link adql.parser.ADQLParser}, to check the generated {@link ADQLQuery} object.</p>
*
* <p>Usually, it consists to check the existence of referenced columns and tables. In this case, one default implementation of this interface can be used: {@link DBChecker}</p>
*
* @author Grégory Mantelet (CDS;ARI)
* @version 1.2 (12/2013)
*/
public interface QueryChecker {
/**
* <p>Checks the given {@link ADQLQuery}.</p>
*
* <p><b>
* <u>Important note:</u>
* All subqueries must also be checked when calling this function!
* </b></p>
*
* <p>If the query is correct, nothing happens. However at the first detected error, a {@link ParseException} is thrown.</p>
*
* @param query The query to check.
*
* @throws ParseException If the given query is not correct.
*/
public void check(ADQLQuery query) throws ParseException;
}