/*
 * Copyright (c) 2019, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.wso2.micro.integrator.dataservices.sql.driver.processor.reader;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

public abstract class AbstractFixedDataReader implements DataReader {

    private Connection connection;

    private Map<String, DataTable> data;

    public AbstractFixedDataReader(Connection connection) throws SQLException {
        this.connection = connection;
        this.data = new HashMap<String, DataTable>();
        this.populateData();
    }

    public abstract void populateData() throws SQLException;

    public Connection getConnection() {
        return connection;
    }

    public Map<String, DataTable> getData() {
        return data;
    }
    
    @Override
    public DataTable getDataTable(String name) throws SQLException {
        DataTable result = this.getData().get(name);
        if (result == null) {
            throw new SQLException("Sheet '" + name + "' does not exist");
        }
        return result;
    }

}
