SqlTableColumn.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 System.IO;

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

namespace Deveel.Data.Sql.Statements {
    [Serializable]
    public sealed class SqlTableColumn : IPreparable, ISerializable {
        public SqlTableColumn(string columnName, SqlType columnType) {
            if (String.IsNullOrEmpty(columnName))
                throw new ArgumentNullException("columnName");
            if (columnType == null)
                throw new ArgumentNullException("columnType");
            
            ColumnName = columnName;
            ColumnType = columnType;
        }

        private SqlTableColumn(ObjectData data) {
            ColumnName = data.GetString("ColumnName");
            ColumnType = data.GetValue<SqlType>("ColumnType");
            IsIdentity = data.GetBoolean("IsIdentity");
            IsNotNull = data.GetBoolean("IsNotNull");
            DefaultExpression = data.GetValue<SqlExpression>("Default");
        }

        public string ColumnName { get; private set; }

        public SqlType ColumnType { get; private set; }

        public bool IsIdentity { get; set; }

        public SqlExpression DefaultExpression { get; set; }

        public bool HasDefaultExpression {
            get { return DefaultExpression != null; }
        }

        public bool IsNotNull { get; set; }

        object IPreparable.Prepare(IExpressionPreparer preparer) {
            var column = new SqlTableColumn(ColumnName, ColumnType);
            if (DefaultExpression != null)
                column.DefaultExpression = DefaultExpression.Prepare(preparer);

            column.IsNotNull = IsNotNull;
            return column;
        }

        //public static SqlTableColumn Deserialize(BinaryReader reader) {
        //  // TODO: Type resolver!!
        //  var columnName = reader.ReadString();
        //  var columnType = TypeSerializer.Deserialize(reader, null);
        //  var notNull = reader.ReadBoolean();
        //  var identity = reader.ReadBoolean();
        //  var defaultExpression = SqlExpression.Deserialize(reader);
        //  return new SqlTableColumn(columnName, columnType) {
        //      IsNotNull = notNull,
        //      IsIdentity = identity,
        //      DefaultExpression = defaultExpression
        //  };
        //}

        //public static void Serialize(SqlTableColumn column, BinaryWriter writer) {
        //  writer.Write(column.ColumnName);
        //  TypeSerializer.SerializeTo(writer, column.ColumnType);
        //  writer.Write(column.IsNotNull);
        //  writer.Write(column.IsIdentity);
        //  SqlExpression.Serialize(column.DefaultExpression, writer);
        //}

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