JoinPart.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;

namespace Deveel.Data.Sql.Expressions {
    [Serializable]
    public sealed class JoinPart : ISerializable {
        internal JoinPart(JoinType joinType, ObjectName tableName, SqlExpression onExpression) {
            if (tableName == null) 
                throw new ArgumentNullException("tableName");

            OnExpression = onExpression;
            JoinType = joinType;
            TableName = tableName;
        }

        internal JoinPart(JoinType joinType, SqlQueryExpression subQuery, SqlExpression onExpression) {
            if (subQuery == null) 
                throw new ArgumentNullException("subQuery");

            OnExpression = onExpression;
            JoinType = joinType;
            SubQuery = subQuery;
        }

        private JoinPart(ObjectData data) {
            TableName = data.GetValue<ObjectName>("Table");
            SubQuery = data.GetValue<SqlQueryExpression>("SubQuery");
            JoinType = (JoinType) data.GetInt32("JoinType");
            OnExpression = data.GetValue<SqlExpression>("On");
        }

        public JoinType JoinType { get; private set; }

        public ObjectName TableName { get; private set; }

        public SqlQueryExpression SubQuery { get; private set; }

        public SqlExpression OnExpression { get; private set; }

        void ISerializable.GetData(SerializeData data) {
            data.SetValue("Table", TableName);
            data.SetValue("SubQuery", SubQuery);
            data.SetValue("JoinType", (int)JoinType);
            data.SetValue("On", OnExpression);
        }

        //public static void Serialize(JoinPart joinPart, BinaryWriter writer) {
        //  writer.Write((byte)joinPart.JoinType);

        //  if (joinPart.SubQuery != null) {
        //      writer.Write((byte)2);
        //      SqlExpression.Serialize(joinPart.SubQuery, writer);
        //  } else {
        //      writer.Write((byte)1);
        //      ObjectName.Serialize(joinPart.TableName, writer);
        //  }

        //  SqlExpression.Serialize(joinPart.OnExpression, writer);
        //}

        //public static JoinPart Deserialize(BinaryReader reader) {
        //  var joinType = (JoinType) reader.ReadByte();

        //  var joinSourceType = reader.ReadByte();

        //  SqlQueryExpression subQuery = null;
        //  ObjectName tableName = null;

        //  if (joinSourceType == 1) {
        //      tableName = ObjectName.Deserialize(reader);
        //  } else if (joinSourceType == 2) {
        //      subQuery = (SqlQueryExpression) SqlExpression.Deserialize(reader);
        //  } else {
        //      throw new FormatException();
        //  }

        //  var onExpression = SqlExpression.Deserialize(reader);

        //  if (joinSourceType == 1)
        //      return new JoinPart(joinType, tableName, onExpression);

        //  return new JoinPart(joinType, subQuery, onExpression);
        //}
    }
}