package com.ibatis.dao.client.template;
import com.ibatis.dao.client.DaoException;
import com.ibatis.dao.client.DaoManager;
import com.ibatis.dao.client.DaoTransaction;
import com.ibatis.dao.engine.transaction.ConnectionDaoTransaction;
import java.sql.Connection;
/**
* A DaoTemplate for JDBC implementations that provides a
* convenient method to access the JDBC Connection.
* <p/>
* Use this template for both JDBC and JTA transaction managers.
* It can also be used for any transaction manager that supports
* normal JDBC connections, including iBATIS SQL Maps and Hibernate.
*/
public abstract class JdbcDaoTemplate extends DaoTemplate {
/**
* The DaoManager that manages this Dao instance will be passed
* in as the parameter to this constructor automatically upon
* instantiation.
*
* @param daoManager
*/
public JdbcDaoTemplate(DaoManager daoManager) {
super(daoManager);
}
/**
* Gets the JDBC Connection associated with the current
* DaoTransaction that this Dao is working under.
*
* @return A JDBC Connection instance.
*/
protected Connection getConnection() {
DaoTransaction trans = daoManager.getTransaction(this);
if (!(trans instanceof ConnectionDaoTransaction)) {
throw new DaoException("The DAO manager of type " + daoManager.getClass().getName() +
" cannot supply a JDBC Connection for this template, and is therefore not" +
"supported by JdbcDaoTemplate.");
}
return ((ConnectionDaoTransaction) trans).getConnection();
}
}