CreateUserStatement.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//

using System;

using Deveel.Data.Security;
using Deveel.Data.Serialization;
using Deveel.Data.Sql.Expressions;

namespace Deveel.Data.Sql.Statements {
    [Serializable]
    public sealed class CreateUserStatement : SqlStatement, IPreparable {
        public CreateUserStatement(string userName, SqlExpression password) {
            if (password == null)
                throw new ArgumentNullException("password");
            if (String.IsNullOrEmpty(userName))
                throw new ArgumentNullException("userName");

            UserName = userName;
            Password = password;
        }

        private CreateUserStatement(ObjectData data) {
            UserName = data.GetString("UserName");
            Password = data.GetValue<SqlExpression>("Password");
        }

        public string UserName { get; private set; }

        public SqlExpression Password { get; private set; }

        protected override void GetData(SerializeData data) {
            data.SetValue("UserName", UserName);
            data.SetValue("Password", Password);
        }

        object IPreparable.Prepare(IExpressionPreparer preparer) {
            var preparedPassword = Password.Prepare(preparer);
            return new CreateUserStatement(UserName, preparedPassword);
        }

        protected override void ExecuteStatement(ExecutionContext context) {
            var evaluated = Password.EvaluateToConstant(context.Request, null);
            var passwordText = evaluated.AsVarChar().Value.ToString();

            context.Request.Query.CreateUser(UserName, passwordText);
        }

        #region PreparedSerializer

        //internal class PreparedSerializer : ObjectBinarySerializer<CreateUserStatement> {
        //  public override void Serialize(CreateUserStatement obj, BinaryWriter writer) {
        //      writer.Write(obj.UserName);
        //      SqlExpression.Serialize(obj.Password, writer);
        //  }

        //  public override CreateUserStatement Deserialize(BinaryReader reader) {
        //      var userName = reader.ReadString();
        //      var expression = SqlExpression.Deserialize(reader);

        //      return new CreateUserStatement(userName, expression);
        //  }
        //}

        #endregion
    }
}