net.paoding.rose.jade.dataaccess.DataSourceHolder Maven / Gradle / Ivy
/*
* 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;
import javax.sql.DataSource;
/**
* 用于表示一个 {@link DataSource} 或 {@link DataSourceFactory} 类。一个
* {@link DataSourceHolder} 有且只能表示这两种类型其中之一
*
*
* @see DataSourceFactory
* @author qieqie.wang
*
*/
public class DataSourceHolder {
private final DataSource dataSource;
private final DataSourceFactory dataSourceFactory;
/**
* 构造一个holder实例，所提供的参数必须是 {@link DataSource} 或
* {@link DataSourceFactory}类型
*
* @throws IllegalArgumentException
*
* @param dataSourceOrItsFactory
*/
public DataSourceHolder(Object dataSourceOrItsFactory) {
if (dataSourceOrItsFactory instanceof DataSource) {
this.dataSource = (DataSource) dataSourceOrItsFactory;
this.dataSourceFactory = null;
return;
}
if (dataSourceOrItsFactory instanceof DataSourceFactory) {
this.dataSource = null;
this.dataSourceFactory = (DataSourceFactory) dataSourceOrItsFactory;
return;
}
throw new IllegalArgumentException("" + dataSourceOrItsFactory);
}
//------------------
/**
* 包含的是一个DataSourceFactory?
*/
public boolean isFactory() {
return this.dataSourceFactory != null;
}
/**
* 返回所代表的 {@link DataSource}，如不是返回null
*
* @return
*/
public DataSource getDataSource() {
return dataSource;
}
/**
* 返回所代表的 {@link DataSourceFactory}，如不是返回null
*
* @return
*/
public DataSourceFactory getFactory() {
return dataSourceFactory;
}
}