package com.nsi.components.util;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.nsi.components.util.info.ClientInfo;
import com.nsi.control.exceptions.NsiEventException;
import com.nsi.persistence.DataSrcUtil;
import com.nsi.persistence.IsqlDataSource;
import com.nsi.util.ValHelper;

public final class ClientInfoUtil
{
	private static Log log = LogFactory.getLog(ClientInfoUtil.class);
	/**
	 * private constructor of ClientInfoUtil, prevent instantiation
	 */
	private ClientInfoUtil()
	{
	}
	private static class ClientInfoUtilHolder
	{
		static final ClientInfoUtil clientInfoUtil = new ClientInfoUtil();
	}
	/**
	 * @return an instance of ClientInfoUtil
	 */
	public static ClientInfoUtil getInstance()
	{
		return ClientInfoUtilHolder.clientInfoUtil;
	}
	public List<ClientInfo> getClientlist()
	{
		List<ClientInfo> list = new ArrayList<ClientInfo>();
		List<Map<String,String>> result = new ArrayList<Map<String,String>>();
		String sSql = "select clientid, shortname, client from ct_client order by client";
		try
		{
			IsqlDataSource src = DataSrcUtil.getInstance().getDataSource();
			Connection conn = null;
			try
			{
				conn = src.getConnection();
				result = src.executeRetrieve(conn, sSql);
				src.closeConn(conn);
			}
			catch( SQLException se )
			{
				log.error( "getClientlist() caught SQLException: ", se );
			}
			catch( Exception ex )
			{
				log.error( "getClientlist() caught Exception: ", ex );
			}
			finally
			{
				src.closeConn(conn);
			}
			if( !result.isEmpty())
			{
				int size = result.size();
				for( int i=0;i<size;i++)
				{
					Map<String,String> resultMap = result.get(i);
					ClientInfo info = new ClientInfo();
					info.setClientid(ValHelper.getInstance().getValue(resultMap, "clientid"));
					info.setShortname(ValHelper.getInstance().getValue(resultMap, "shortname"));
					info.setClient(ValHelper.getInstance().getValue(resultMap, "client"));
					list.add( info);
				}
			}
		}
		catch( NsiEventException nsiex )
		{
			log.error( "getClientlist() caught NsiEventException: ", nsiex );
		}
		return list;
	}
}