/*
 * Copyright 2009-2011 Collaborative Research Centre SFB 632 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package annis.sqlgen;

import annis.model.QueryNode;
import annis.ql.parser.QueryData;
import static annis.sqlgen.AbstractSqlGenerator.TABSTOP;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.ResultSetExtractor;
public class CountSqlGenerator extends AbstractSolutionMatchInFromClauseSqlGenerator
	implements SelectClauseSqlGenerator<QueryData>, FromClauseSqlGenerator<QueryData>,
  ResultSetExtractor<Integer>
{

	@Override
	public String selectClause(QueryData queryData, List<QueryNode> alternative, String indent) {
		return "\n" + indent + TABSTOP + "count(*)";
	}

	@Override
	public Integer extractData(ResultSet rs) throws SQLException, DataAccessException {
		int sum = 0;
	  while (rs.next())
    {
		  sum += rs.getInt(1);
    }
	  return sum;
	}
}