/*
 * Copyright 2004-2013 the Seasar Foundation and the Others.
 *
 * 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 org.seasar.extension.dataset.impl;

import javax.sql.DataSource;

import org.seasar.extension.dataset.DataReader;
import org.seasar.extension.dataset.DataSet;
import org.seasar.extension.dataset.TableReader;

/**
 * SQLのreload用の {@link DataReader}です。
 * 
 * @author higa
 * 
 */
public class SqlReloadReader implements DataReader {

    private DataSource dataSource;

    private DataSet dataSet;

    /**
     * {@link SqlReloadReader}を作成します。
     * 
     * @param dataSource
     *            データソース
     * @param dataSet
     *            データセット
     */
    public SqlReloadReader(DataSource dataSource, DataSet dataSet) {
        this.dataSource = dataSource;
        this.dataSet = dataSet;
    }

    /**
     * データソースを返します。
     * 
     * @return データソース
     */
    public DataSource getDataSource() {
        return dataSource;
    }

    /**
     * データセットを返します。
     * 
     * @return データセット
     */
    public DataSet getDataSet() {
        return dataSet;
    }

    /**
     * @see org.seasar.extension.dataset.DataReader#read()
     */
    public DataSet read() {
        DataSet newDataSet = new DataSetImpl();
        for (int i = 0; i < dataSet.getTableSize(); ++i) {
            TableReader reader = new SqlReloadTableReader(dataSource, dataSet
                    .getTable(i));
            newDataSet.addTable(reader.read());
        }
        return newDataSet;
    }

}