/**

  *

  * 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.commons.dbcp.managed;

 import org.apache.commons.pool.ObjectPool;

 import org.apache.commons.dbcp.PoolingDataSource;

 import java.sql.Connection;

 import java.sql.SQLException;

 /**

  * The ManagedDataSource is a PoolingDataSource that creates ManagedConnections.

  *

  * @author Dain Sundstrom

  * @version $Revision$

  */

 public class ManagedDataSource extends PoolingDataSource {

     private TransactionRegistry transactionRegistry;

     /**

      * Creates an uninitialized datasource.  Before this data source can be used a pool and

      * transaction registry must be set.

      */

     public ManagedDataSource() {

     }

     /**

      * Creates a ManagedDataSource which obtains connections from the specified pool and

      * manages them using the specified transaction registry.  The TransactionRegistry must

      * be the transaction registry obtained from the XAConnectionFactory used to create

      * the connection pool.  If not an error will occure when attempting to use the connection

      * in a global transaction because the XAResource object associated with the connection

      * will be unavailable.

      *

      * @param pool the connection pool

      * @param transactionRegistry the transaction registry obtained from the

      * XAConnectionFactory used to create the connection pool object factory

      */

     public ManagedDataSource(ObjectPool pool, TransactionRegistry transactionRegistry) {

         super(pool);

         this.transactionRegistry = transactionRegistry;

     }

     /**

      * Sets the transaction registry from the XAConnectionFactory used to create the pool.

      * The transaction registry can only be set once using either a connector or this setter

      * method.

      * @param transactionRegistry the transaction registry acquired from the XAConnectionFactory

      * used to create the pool

      */

     public void setTransactionRegistry(TransactionRegistry transactionRegistry) {

         if(this.transactionRegistry != null) throw new IllegalStateException("TransactionRegistry already set");

         if(transactionRegistry == null) throw new NullPointerException("TransactionRegistry is null");

         this.transactionRegistry = transactionRegistry;

     }

     public Connection getConnection() throws SQLException {

         if (_pool == null) throw new IllegalStateException("Pool has not been set");

         if (transactionRegistry == null) throw new IllegalStateException("TransactionRegistry has not been set");

         Connection connection = new ManagedConnection(_pool, transactionRegistry, isAccessToUnderlyingConnectionAllowed());

         return connection;

     }

 }