using System;

namespace Zhaizj.Framework.Data {

    /// <summary>
    /// sqlserver ÌØÊâÓï·¨´¦ÀíÆ÷
    /// </summary>
    public class SQLServerDialect : IDatabaseDialect {
        public String GetConnectionItem( String connectionString, ConnectionItemType connectionItem ) {
            String str = connectionItem.ToString().ToLower().Replace( "userid", "uid" ).Replace( "password", "pwd" );
            String[] strArray = connectionString.ToLower().Split( new char[] { ';' } );
            foreach (String item in strArray) {
                if (item.Trim().ToLower().StartsWith( str )) {
                    return item.Replace( str, "" ).Replace( "=", "" ).Replace( " ", "" );
                }
            }
            return null;
        }

        public String GetTimeQuote() {
            return "'";
        }

        public String GetLimit( String sql, int limit ) {
            return sql.ToLower().Replace( "select ", "select top " + limit + " " );
        }

        public String GetLimit( String sql ) {
            return sql;
        }

        public String GetParameter( String parameterName ) {
            return ("@" + parameterName);
        }

        public String GetParameterAdder( String parameterName ) {
            return ("@" + parameterName);
        }

        public String Top {
            get { return "top"; }
        }

        public string GetLeftQuote() {
            return "[";
        }

        public string GetRightQuote() {
            return "]";
        }

    }
}