/*
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 
 * - Redistributions of source code must retain the above copyright
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 * 
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 *   the documentation and/or other materials provided with the
 *   distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
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 */

package com.sun.j2ee.blueprints.catalog.dao;

import javax.naming.NamingException;
import javax.naming.InitialContext;

import com.sun.j2ee.blueprints.catalog.util.JNDINames;
import com.sun.j2ee.blueprints.catalog.exceptions.CatalogDAOSysException;

public class CatalogDAOFactory {

    /**
     * This method instantiates a particular subclass implementing
     * the DAO methods based on the information obtained from the
     * deployment descriptor
     */
    public static CatalogDAO getDAO() throws CatalogDAOSysException {

        CatalogDAO catDao = null;
        try {
            InitialContext ic = new InitialContext();
            String className = (String) ic.lookup(JNDINames.CATALOG_DAO_CLASS);
            catDao = (CatalogDAO) Class.forName(className).newInstance();
        } catch (NamingException ne) {
            throw new CatalogDAOSysException("CatalogDAOFactory.getDAO:  NamingException while getting DAO type : \n" + ne.getMessage());
        } catch (Exception se) {
            throw new CatalogDAOSysException("CatalogDAOFactory.getDAO:  Exception while getting DAO type : \n" + se.getMessage());
        }
        return catDao;
    }
}