/*
 * Copyright 2009-2012 the original author or authors.
 *
 * 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 i 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 net.paoding.rose.jade.dataaccess.datasource;

import java.util.Map;

import javax.sql.DataSource;

import net.paoding.rose.jade.dataaccess.DataSourceFactory;
import net.paoding.rose.jade.dataaccess.DataSourceHolder;
import net.paoding.rose.jade.statement.StatementMetaData;

/**
 * 当你的应用程序只需要一个DataSource时候使用这个实现即可！
 * 
 * @author 王志亮 [qieqie.wang@gmail.com]
 * 
 */
public class SimpleDataSourceFactory implements DataSourceFactory {

    private DataSourceHolder dataSource;

    /**
     * 构造候还得继续调用 {@link #setDataSource(DataSource)} 设置数据源，谢谢
     */
    public SimpleDataSourceFactory() {
    }

    /**
     * 提供的数据源要求非null
     * 
     * @param dataSource
     */
    public SimpleDataSourceFactory(DataSource dataSource) {
        setDataSource(dataSource);
    }

    /**
     * 设置数据源。
     * <p>
     * 提供的数据源要求非null
     * 
     * @param dataSource
     */
    public void setDataSource(DataSource dataSource) {
        if (dataSource == null) {
            throw new NullPointerException("dataSource");
        }
        this.dataSource = new DataSourceHolder(dataSource);
    }

    @Override
    public DataSourceHolder getHolder(StatementMetaData metaData,
            Map<String, Object> runtimeProperties) {
        return dataSource;
    }

}