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

namespace Deveel.Data.Sql.Statements {
    [Serializable]
    public sealed class AddColumnAction : IAlterTableAction, IPreparable {
        public AddColumnAction(SqlTableColumn column) {
            if (column == null)
                throw new ArgumentNullException("column");

            Column = column;
        }

        private AddColumnAction(ObjectData data) {
            Column = data.GetValue<SqlTableColumn>("Column");
        }

        public SqlTableColumn Column { get; private set; }

        object IPreparable.Prepare(IExpressionPreparer preparer) {
            var newColumn = new SqlTableColumn(Column.ColumnName, Column.ColumnType) {
                IsNotNull = Column.IsNotNull
            };

            var defaultExp = Column.DefaultExpression;
            if (defaultExp != null)
                newColumn.DefaultExpression = defaultExp.Prepare(preparer);

            return new AddColumnAction(newColumn);
        }

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

        void ISerializable.GetData(SerializeData data) {
            data.SetValue("Column", Column);
        }
    }
}