/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.flink.connector.jdbc.core.datastream.source.reader.extractor;

import org.apache.flink.types.Row;
import org.apache.flink.util.Preconditions;

import java.sql.ResultSet;
import java.sql.SQLException;

/** The extractor is used to extract the data from {@link ResultSet} into a {@link Row} object. */
public class RowResultExtractor implements ResultExtractor<Row> {
    @Override
    public Row extract(ResultSet resultSet) throws SQLException {
        int arity = resultSet.getMetaData().getColumnCount();
        Row row = new Row(arity);
        Preconditions.checkArgument(!resultSet.isClosed());
        for (int index = 0; index < row.getArity(); index++) {
            row.setField(index, resultSet.getObject(index + 1));
        }
        return row;
    }
}
