resourcedaofactory.java

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package com.eline.wap.resource.dao;

import com.eline.wap.common.util.AppKeys;
import com.eline.wap.common.util.AppSettings;
import com.eline.wap.resource.exceptions.ResourceDAOSysException;


public class ResourceDAOFactory {

	static public CategoryDAO getCategoryDAO() throws ResourceDAOSysException {
		CategoryDAO categoryDao = null;
		try {
			String provider = AppSettings.getInstance().getProperty(AppKeys.DS_TYPE);
			if (provider == null || provider.equals("") || provider.equalsIgnoreCase("SQLServer"))
				categoryDao = new MSSqlCategoryDAO();
			else if (provider.equalsIgnoreCase("Oracle"))
				throw new ResourceDAOSysException("unsupported datasource type."); 
			
			/*InitialContext ic = new InitialContext();
			String className = (String) ic.lookup(JNDINames.CATEGORY_DAO_CLASS);
			categoryDao = (CategoryDAO) Class.forName(className).newInstance();*/
		} catch (ResourceDAOSysException e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  ResourceDAOSysException while getting DAO type : \n" + e.getMessage());
		} catch (Exception e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  Exception while getting DAO type : \n" + e.getMessage());
		}
		return categoryDao;

	}
	
	static public BookDAO getBookDAO() throws ResourceDAOSysException {
		BookDAO bookDao = null;
		try {
			String provider = AppSettings.getInstance().getProperty(AppKeys.DS_TYPE);
			if (provider == null || provider.equals("") || provider.equalsIgnoreCase("SQLServer"))
				bookDao = new MSSqlBookDAO();
			else if (provider.equalsIgnoreCase("Oracle"))
				throw new ResourceDAOSysException("unsupported datasource type."); 
		} catch (ResourceDAOSysException e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  ResourceDAOSysException while getting DAO type : \n" + e.getMessage());
		} catch (Exception e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  Exception while getting DAO type : \n" + e.getMessage());
		}
		return bookDao;
	}
	
	static public PictureDAO getPictureDAO() throws ResourceDAOSysException {
		PictureDAO pictureDao = null;
		try {
			String provider = AppSettings.getInstance().getProperty(AppKeys.DS_TYPE);
			if (provider == null || provider.equals("") || provider.equalsIgnoreCase("SQLServer"))
				pictureDao = new MSSqlPictureDAO();
			else if (provider.equalsIgnoreCase("Oracle"))
				throw new ResourceDAOSysException("unsupported datasource type."); 
		} catch (ResourceDAOSysException e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  ResourceDAOSysException while getting DAO type : \n" + e.getMessage());
		} catch (Exception e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  Exception while getting DAO type : \n" + e.getMessage());
		}
		return pictureDao;
	}
	
	static public NewsDAO getNewsDAO() throws ResourceDAOSysException {
		NewsDAO NewsDao = null;
		try {
			String provider = AppSettings.getInstance().getProperty(AppKeys.DS_TYPE);
			if (provider == null || provider.equals("") || provider.equalsIgnoreCase("SQLServer"))
				NewsDao = new MSSqlNewsDAO();
			else if (provider.equalsIgnoreCase("Oracle"))
				throw new ResourceDAOSysException("unsupported datasource type."); 
		} catch (ResourceDAOSysException e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  ResourceDAOSysException while getting DAO type : \n" + e.getMessage());
		} catch (Exception e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  Exception while getting DAO type : \n" + e.getMessage());
		}
		return NewsDao;
	}
	
	static public RingDAO getRingDAO() throws ResourceDAOSysException {
		RingDAO RingDao = null;
		try {
			String provider = AppSettings.getInstance().getProperty(AppKeys.DS_TYPE);
			if (provider == null || provider.equals("") || provider.equalsIgnoreCase("SQLServer"))
				RingDao = new MSSqlRingDAO();
			else if (provider.equalsIgnoreCase("Oracle"))
				throw new ResourceDAOSysException("unsupported datasource type."); 
		} catch (ResourceDAOSysException e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  ResourceDAOSysException while getting DAO type : \n" + e.getMessage());
		} catch (Exception e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  Exception while getting DAO type : \n" + e.getMessage());
		}
		return RingDao;
	}
	
	static public KJavaDAO getKJavaDAO() throws ResourceDAOSysException {
		KJavaDAO kjavaDao = null;
		try {
			String provider = AppSettings.getInstance().getProperty(AppKeys.DS_TYPE);
			if (provider == null || provider.equals("") || provider.equalsIgnoreCase("SQLServer"))
				kjavaDao = new MSSqlKJavaDAO();
			else if (provider.equalsIgnoreCase("Oracle"))
				throw new ResourceDAOSysException("unsupported datasource type."); 
		} catch (ResourceDAOSysException e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  ResourceDAOSysException while getting DAO type : \n" + e.getMessage());
		} catch (Exception e) {
			throw new ResourceDAOSysException("ResourceDAOFactory.getDAO:  Exception while getting DAO type : \n" + e.getMessage());
		}
		return kjavaDao;
	}
}