SetDefaultAction.cs

Go to the documentation of this file.

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

namespace Deveel.Data.Sql.Statements {
    [Serializable]
    public sealed class SetDefaultAction : IAlterTableAction, IPreparable {
        public SetDefaultAction(string columnName, SqlExpression defaultExpression) {
            ColumnName = columnName;
            DefaultExpression = defaultExpression;
        }

        private SetDefaultAction(ObjectData data) {
            ColumnName = data.GetString("ColumnName");
            DefaultExpression = data.GetValue<SqlExpression>("Default");
        }

        public string ColumnName { get; private set; }

        public SqlExpression DefaultExpression { get; private set; }

        AlterTableActionType IAlterTableAction.ActionType {
            get { return AlterTableActionType.SetDefault; }
        }

        object IPreparable.Prepare(IExpressionPreparer preparer) {
            var defaultExp = DefaultExpression;
            if (defaultExp != null)
                defaultExp = defaultExp.Prepare(preparer);

            return new SetDefaultAction(ColumnName, defaultExp);
        }

        void ISerializable.GetData(SerializeData data) {
            data.SetValue("ColumnName", ColumnName);
            data.SetValue("Default", DefaultExpression);
        }
    }
}