/Current/NetJsWire2/NetJsWire.Direct/customJsonConverter/DataRowConverter.cs

#region Header

// Copyright 2007-2011, Jerónimo Milea

// 

// This file is part of NetJsWire.

// 

//     NetJsWire is free software: you can redistribute it and/or modify

//     it under the terms of the GNU General Public License as published by

//     the Free Software Foundation, either version 3 of the License, or

//     (at your option) any later version.

// 

//     NetJsWire is distributed in the hope that it will be useful,

//     but WITHOUT ANY WARRANTY; without even the implied warranty of

//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

//     GNU General Public License for more details.

// 

//     You should have received a copy of the GNU General Public License

//     along with NetJsWire.  If not, see <http://www.gnu.org/licenses/>.

#endregion



using System;

using System.Data;

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;



namespace NetJsWire.Direct.customJsonConverter

{

    class DataRowConverter : JsonConverter

    {

        /// <summary>

        ///   Writes the JSON representation of the object.

        /// </summary>

        /// <param name = "writer">The <see cref = "JsonWriter" /> to write to.</param>

        /// <param name = "value">The value.</param>

        public override void WriteJson( JsonWriter writer, object value, JsonSerializer serializer )

        {

            var row = value as DataRow;







            // *** HACK: need to use root serializer to write the column value

            //     should be fixed in next ver of JSON.NET with writer.Serialize(object)

            var ser = new JsonSerializer();



            ser.Converters.Add( new DataRowConverter() );

            ser.Converters.Add( new JavaScriptDateTimeConverter() );

            writer.WriteStartObject();

            foreach ( DataColumn column in row.Table.Columns )

            {

                writer.WritePropertyName( column.ColumnName );

                ser.Serialize( writer, row[ column ] );

            }

            writer.WriteEndObject();



        }





        /// <summary>

        ///   Determines whether this instance can convert the specified value type.

        /// </summary>

        /// <param name = "valueType">Type of the value.</param>

        /// <returns>

        ///   <c>true</c> if this instance can convert the specified value type; otherwise, <c>false</c>.

        /// </returns>

        public override bool CanConvert( Type valueType )

        {

            return typeof( DataRow ).IsAssignableFrom( valueType );

        }



        /// <summary>

        ///   Reads the JSON representation of the object.

        /// </summary>

        /// <param name = "reader">The <see cref = "JsonReader" /> to read from.</param>

        /// <param name = "objectType">Type of the object.</param>

        /// <returns>The object value.</returns>

        public override object ReadJson( JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer )

        {

            throw new NotImplementedException();

        }

    }



    class DataRowViewConverter : JsonConverter

    {

        /// <summary>

        ///   Writes the JSON representation of the object.

        /// </summary>

        /// <param name = "writer">The <see cref = "JsonWriter" /> to write to.</param>

        /// <param name = "value">The value.</param>

        public override void WriteJson( JsonWriter writer, object value, JsonSerializer serializer )

        {

            var row = value as DataRowView;







            // *** HACK: need to use root serializer to write the column value

            //     should be fixed in next ver of JSON.NET with writer.Serialize(object)

            var ser = new JsonSerializer();



            ser.Converters.Add( new JavaScriptDateTimeConverter() );



            writer.WriteStartObject();

            var i = 0;

            foreach ( DataColumn column in row.DataView.Table.Columns )

            {

                writer.WritePropertyName( column.ColumnName );



                ser.Serialize( writer, row[ i ] );

                i++;

            }

            writer.WriteEndObject();



        }





        /// <summary>

        ///   Determines whether this instance can convert the specified value type.

        /// </summary>

        /// <param name = "valueType">Type of the value.</param>

        /// <returns>

        ///   <c>true</c> if this instance can convert the specified value type; otherwise, <c>false</c>.

        /// </returns>

        public override bool CanConvert( Type valueType )

        {

            return typeof( DataRowView ).IsAssignableFrom( valueType );

        }



        /// <summary>

        ///   Reads the JSON representation of the object.

        /// </summary>

        /// <param name = "reader">The <see cref = "JsonReader" /> to read from.</param>

        /// <param name = "objectType">Type of the object.</param>

        /// <returns>The object value.</returns>

        public override object ReadJson( JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer )

        {

            throw new NotImplementedException();

        }

    }



    class DataRowCollectionConverter : JsonConverter

    {

        /// <summary>

        ///   Writes the JSON representation of the object.

        /// </summary>

        /// <param name = "writer">The <see cref = "JsonWriter" /> to write to.</param>

        /// <param name = "dataRows">The value.</param>

        public override void WriteJson( JsonWriter writer, object dataRows, JsonSerializer serializer )

        {

            var rows = dataRows as DataRowCollection;

            var converter = new DataRowConverter();









            // *** HACK: need to use root serializer to write the column value

            //     should be fixed in next ver of JSON.NET with writer.Serialize(object)

            var ser = new JsonSerializer();



            ser.Converters.Add( new JavaScriptDateTimeConverter() );

            writer.WriteStartArray();

            if ( dataRows != null )

            {

                foreach ( DataRow dataRow in rows )

                {

                    converter.WriteJson( writer, dataRow, serializer );

                }

            }

            writer.WriteEndArray();



        }





        /// <summary>

        ///   Determines whether this instance can convert the specified value type.

        /// </summary>

        /// <param name = "valueType">Type of the value.</param>

        /// <returns>

        ///   <c>true</c> if this instance can convert the specified value type; otherwise, <c>false</c>.

        /// </returns>

        public override bool CanConvert( Type valueType )

        {

            return typeof( DataRowCollection ).IsAssignableFrom( valueType );

        }



        /// <summary>

        ///   Reads the JSON representation of the object.

        /// </summary>

        /// <param name = "reader">The <see cref = "JsonReader" /> to read from.</param>

        /// <param name = "objectType">Type of the object.</param>

        /// <returns>The object value.</returns>

        public override object ReadJson( JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer )

        {

            throw new NotImplementedException();

        }

    }

}