package org.apache.turbine.util.db.adapter;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache Turbine" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache Turbine", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.sql.ConnectionPoolDataSource;
/**
* This code should be used for an Oracle database pool.
*
* @author <a href="mailto:jon@clearink.com">Jon S. Stevens</a>
* @author <a href="mailto:bmclaugh@algx.net">Brett McLaughlin</a>
* @version $Id$
*/
public class DBOracle
extends DB
{
/**
* Empty constructor.
*/
protected DBOracle()
{
}
/**
* This method is used to ignore case.
*
* @param in The string to transform to upper case.
* @return The upper case string.
*/
public String toUpperCase(String in)
{
return new StringBuffer("UPPER(").append(in).append(")").toString();
}
/**
* This method is used to ignore case.
*
* @param in The string whose case to ignore.
* @return The string in a case that can be ignored.
*/
public String ignoreCase(String in)
{
return new StringBuffer("UPPER(").append(in).append(")").toString();
}
/**
* Gets the string delimiter (usually '\'').
*
* @return The delimeter.
*/
public char getStringDelimiter()
{
return '\'';
}
/**
* Returns the SQL to get the database key of the last row
* inserted.
* Oracle doesn't have this, so it returns null.
*
* @return null.
*/
public String getIdSqlForAutoIncrement(Object obj)
{
return null;
}
/**
* Returns the next key from a sequence. Databases like Oracle
* which support this feature will return a result, others will
* return null.
*
* Oracle does this by returning
*
* select sequenceName.nextval from dual
*
* @param sequenceName, An object of type String
* @return The next database key.
*/
public String getSequenceSql(Object sequenceName)
{
return new StringBuffer()
.append("select ")
.append((String)sequenceName)
.append(".nextval from dual")
.toString();
}
/**
* Locks the specified table.
*
* @param con The JDBC connection to use.
* @param table The name of the table to lock.
* @exception SQLException, No Statement could be created or
* executed.
*/
public void lockTable(Connection con,
String table)
throws SQLException
{
Statement statement = con.createStatement();
StringBuffer stmt = new StringBuffer();
stmt.append( "SELECT next_id FROM " )
.append( table )
.append( " FOR UPDATE" );
statement.executeQuery( stmt.toString() );
}
/**
* Unlocks the specified table.
*
* @param con The JDBC connection to use.
* @param table The name of the table to unlock.
* @exception SQLException No Statement could be created or
* executed.
*/
public void unlockTable(Connection con, String table) throws SQLException
{
// Tables in Oracle are unlocked when a commit is issued. The
// user may have issued a commit but do it here to be sure.
con.commit();
}
public ConnectionPoolDataSource getConnectionPoolDataSource()
throws java.sql.SQLException
{
try
{
Class c = Class.forName("oracle.jdbc.pool.OracleConnectionPoolDataSource");
ConnectionPoolDataSource instance =
(ConnectionPoolDataSource) c.newInstance();
// use introspection to set the url in order to avoid import
// of JDBC specific classes
Method m = c.getMethod("setURL", new Class[]{ String.class });
m.invoke(instance, new Object[]{ DB_CONNECTION });
return (ConnectionPoolDataSource) instance;
}
catch (Exception e)
{
throw new
SQLException("Could not create OracleConnectioPoolDataSource object: " + e);
}
}
}