/*


 ========== licence begin GPL
    Copyright (C) 2002-2003 SAP AG

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
    ========== licence end


 */

package com.sap.dbtech.jdbcext;

import java.util.Enumeration;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Properties;

import javax.naming.Context;
import javax.naming.Name;
import javax.naming.StringRefAddr;
import javax.naming.spi.ObjectFactory;

public class DataSourceSapDBFactory implements ObjectFactory {
	static HashSet forbiddenproperties;

	public Object getObjectInstance(Object obj, Name name, Context nameCtx,
			Hashtable environment) {
		if (obj instanceof javax.naming.Reference) {
			javax.naming.Reference ref = (javax.naming.Reference) obj;
			if ("com.sap.dbtech.jdbcext.XADataSourceSapDB".equals(ref
					.getClassName())) {
				Properties p = propertiesFromRef(ref);
				XADataSourceSapDB result = new XADataSourceSapDB();
				result.setProperties(p);
				return result;
			} else if ("com.sap.dbtech.jdbcext.ConnectionPoolDataSourceSapDB"
					.equals(ref.getClassName())) {
				Properties p = propertiesFromRef(ref);
				ConnectionPoolDataSourceSapDB result = new ConnectionPoolDataSourceSapDB();
				result.setProperties(p);
				return result;
			} else if ("com.sap.dbtech.jdbcext.DataSourceSapDB".equals(ref
					.getClassName())) {
				Properties p = propertiesFromRef(ref);
				DataSourceSapDB result = new DataSourceSapDB();
				result.setProperties(p);
				return result;
			} else {
				return null;
			}
		} else {
			return null;
		}
	}

	private Properties propertiesFromRef(javax.naming.Reference ref) {
		Enumeration refaddrs = ref.getAll();
		Properties result = new Properties();
		while (refaddrs.hasMoreElements()) {
			Object o = refaddrs.nextElement();
			try {
				StringRefAddr stringref = (StringRefAddr) o;
				if (forbiddenproperties.contains(stringref.getType())) {
					continue;
				}
				if (!stringref.getType().equals("isolation")) {
					String stringreftype = stringref.getType();
					String content = (String) stringref.getContent();
					if (content != null) {
						result.setProperty(stringreftype, content);
					}
				} else {
					String j2eeisolation = (String) (stringref.getContent());
					if (j2eeisolation.equals("none")) { // inqmy for 'dont set
														// this!'
						continue;
					} else if (j2eeisolation.equals("ruc")) { // inqmy for
																// read
																// uncommitted
						j2eeisolation = "TRANSACTION_READ_UNCOMMITTED";
					} else if (j2eeisolation.equals("rc")) { // inqmy for
																// read
																// committed
						j2eeisolation = "TRANSACTION_READ_COMMITTED";
					} else if (j2eeisolation.equals("rr")) { // inqmy for
																// repeatable
																// read
						j2eeisolation = "TRANSACTION_REPEATABLE_READ";
					} else if (j2eeisolation.equals("s")) { // inqmy for
															// serializable
						j2eeisolation = "TRANSACTION_SERIALIZABLE";
					}
					result.setProperty("isolation", j2eeisolation);
				}
			} catch (ClassCastException ccx) {
			}
		}
		return result;
	}

	static {
		forbiddenproperties = new HashSet();
		forbiddenproperties.add("autocommit");
	}
}