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fastBinaryJSON

, 20 Oct 2016 CPOL
A binary JSON serializer based on fastJSON (support for MonoDroid)
Consoletest
fastBinaryJSON
Properties
UnitTests
Properties
UnitTests.nunit
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
UnitTests.nunit
UnitTests.nunit
UnitTests.nunit
UnitTests.nunit
UnitTests.nunit
UnitTests.nunit
UnitTests.nunit
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
readme.md
UnitTests.nunit
fastBinaryJSON.nuspec
fastJSON.snk
readme.md
UnitTests.nunit
fastJSON.snk
readme.md
UnitTests.nunit
fastJSON.snk
readme.md
UnitTests.nunit
fastBinaryJSON.nuspec
fastJSON.snk
readme.md
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
readme.md
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
fastJSON.snk
UnitTests.nunit
using System;
using System.Collections;
using System.Collections.Generic;
#if SILVERLIGHT

#else
using System.Data;
#endif
using System.Globalization;
using System.IO;
using System.Text;

namespace fastBinaryJSON
{
    internal sealed class BJSONSerializer
    {
        private MemoryStream _output = new MemoryStream();
        private MemoryStream _before = new MemoryStream();
        readonly int _MAX_DEPTH = 10;
        int _current_depth = 0;
        private Dictionary<string, int> _globalTypes = new Dictionary<string, int>();
        private BJSONParameters _params;

        internal BJSONSerializer(BJSONParameters param)
        {
            _params = param;
        }

        internal byte[] ConvertToBJSON(object obj)
        {
            WriteValue(obj);
            // add $types
            if (_params.UsingGlobalTypes && _globalTypes != null && _globalTypes.Count>0)
            {
                byte[] after = _output.ToArray();
                _output = _before;
                WriteName("$types");
                WriteColon();
                WriteTypes(_globalTypes);
                WriteComma();
                _output.Write(after, 0, after.Length);

                return _output.ToArray();
            }

            return _output.ToArray();
        }

        private void WriteTypes(Dictionary<string, int> dic)
        {
            _output.WriteByte(TOKENS.DOC_START);

            bool pendingSeparator = false;

            foreach (var entry in dic)
            {
                if (pendingSeparator) WriteComma();

                WritePair(entry.Value.ToString(), entry.Key);

                pendingSeparator = true;
            }
            _output.WriteByte(TOKENS.DOC_END);
        }

        private void WriteValue(object obj)
        {
            if (obj == null || obj is DBNull)
                WriteNull();

            else if (obj is string)
                WriteString((string)obj);

            else if (obj is char)
                WriteChar((char)obj);

            else if (obj is Guid)
                WriteGuid((Guid)obj);

            else if (obj is bool)
                WriteBool((bool)obj);

            else if (obj is int)
                WriteInt((int)obj);

            else if (obj is uint)
                WriteUInt((uint)obj);

            else if (obj is long)
                WriteLong((long)obj);

            else if (obj is ulong)
                WriteULong((ulong)obj);

            else if (obj is decimal)
                WriteDecimal((decimal)obj);

            else if (obj is byte)
                WriteByte((byte)obj);

            else if (obj is double)
                WriteDouble((double)obj);

            else if (obj is float)
                WriteFloat((float)obj);

            else if (obj is short)
                WriteShort((short)obj);

            else if (obj is ushort)
                WriteUShort((ushort)obj);

            else if (obj is DateTime)
                WriteDateTime((DateTime)obj);

            else if (obj is IDictionary && obj.GetType().IsGenericType && obj.GetType().GetGenericArguments()[0] == typeof(string))
                WriteStringDictionary((IDictionary)obj);

            else if (obj is IDictionary)
                WriteDictionary((IDictionary)obj);
#if !SILVERLIGHT
            else if (obj is DataSet)
                WriteDataset((DataSet)obj);

            else if (obj is DataTable)
                this.WriteDataTable((DataTable)obj);
#endif
            else if (obj is byte[])
                WriteBytes((byte[])obj);

            else if (obj is IEnumerable)// Array || obj is IList || obj is ICollection)
                WriteArray((IEnumerable)obj);

            else if (obj is Enum)
                WriteEnum((Enum)obj);

            else if (BJSON.Instance.IsTypeRegistered(obj.GetType()))
                WriteCustom(obj);

            else
                WriteObject(obj);
        }

        private void WriteUShort(ushort p)
        {
            _output.WriteByte(TOKENS.USHORT);
            _output.Write(Helper.GetBytes(p, false), 0, 2);
        }

        private void WriteShort(short p)
        {
            _output.WriteByte(TOKENS.SHORT);
            _output.Write(Helper.GetBytes(p, false), 0, 2);
        }

        private void WriteFloat(float p)
        {
            _output.WriteByte(TOKENS.FLOAT);
            byte[] b = BitConverter.GetBytes(p);
            _output.Write(b, 0, b.Length);
        }

        private void WriteDouble(double p)
        {
            _output.WriteByte(TOKENS.DOUBLE);
            var b = BitConverter.GetBytes(p);
            _output.Write(b, 0, b.Length);
        }

        private void WriteByte(byte p)
        {
            _output.WriteByte(TOKENS.BYTE);
            _output.WriteByte(p);
        }

        private void WriteDecimal(decimal p)
        {
            _output.WriteByte(TOKENS.DECIMAL);
            var b = decimal.GetBits(p);
            foreach (var c in b)
                _output.Write(Helper.GetBytes(c, false), 0, 4);
        }

        private void WriteULong(ulong p)
        {
            _output.WriteByte(TOKENS.ULONG);
            _output.Write(Helper.GetBytes((long)p, false), 0, 8);
        }

        private void WriteUInt(uint p)
        {
            _output.WriteByte(TOKENS.UINT);
            _output.Write(Helper.GetBytes(p, false), 0, 4);
        }

        private void WriteLong(long p)
        {
            _output.WriteByte(TOKENS.LONG);
            _output.Write(Helper.GetBytes(p, false), 0, 8);
        }

        private void WriteChar(char p)
        {
            // TODO : 
            //_output.WriteByte(TOKENS.CHAR);
            //_output.Write(Helper.GetBytes(
            throw new Exception("char not implemented yet");
        }

        private void WriteBytes(byte[] p)
        {
            _output.WriteByte(TOKENS.BYTEARRAY);
            _output.Write(Helper.GetBytes(p.Length, false), 0, 4);
            _output.Write(p, 0, p.Length);
        }

        private void WriteBool(bool p)
        {
            if (p)
                _output.WriteByte(TOKENS.TRUE);
            else
                _output.WriteByte(TOKENS.FALSE);
        }

        private void WriteNull()
        {
            _output.WriteByte(TOKENS.NULL);
        }


        private void WriteCustom(object obj)
        {
            Serialize s;
            BJSON.Instance._customSerializer.TryGetValue(obj.GetType(), out s);
            WriteString(s(obj));
        }

        private void WriteColon()
        {
            _output.WriteByte(TOKENS.COLON);
        }

        private void WriteComma()
        {
            _output.WriteByte(TOKENS.COMMA);
        }

        private void WriteEnum(Enum e)
        {
            WriteString(e.ToString());
        }

        private void WriteInt(int i)
        {
            _output.WriteByte(TOKENS.INT);
            _output.Write(Helper.GetBytes(i, false), 0, 4);
        }

        private void WriteGuid(Guid g)
        {
            _output.WriteByte(TOKENS.GUID);
            _output.Write(g.ToByteArray(), 0, 16);
        }

        private void WriteDateTime(DateTime dateTime)
        {
            DateTime dt = dateTime;
            if (_params.UseUTCtimes)
                dt = dateTime.ToUniversalTime();

            _output.WriteByte(TOKENS.DATETIME);
            byte[] b = Helper.GetBytes(dt.Ticks, false);
            _output.Write(b, 0, b.Length);
        }

#if !SILVERLIGHT
        private DatasetSchema GetSchema(DataTable ds)
        {
            if (ds == null) return null;

            DatasetSchema m = new DatasetSchema();
            m.Info = new List<string>();
            m.Name = ds.TableName;

            foreach (DataColumn c in ds.Columns)
            {
                m.Info.Add(ds.TableName);
                m.Info.Add(c.ColumnName);
                m.Info.Add(c.DataType.ToString());
            }
            // FEATURE : serialize relations and constraints here

            return m;
        }

        private DatasetSchema GetSchema(DataSet ds)
        {
            if (ds == null) return null;

            DatasetSchema m = new DatasetSchema();
            m.Info = new List<string>();
            m.Name = ds.DataSetName;

            foreach (DataTable t in ds.Tables)
            {
                foreach (DataColumn c in t.Columns)
                {
                    m.Info.Add(t.TableName);
                    m.Info.Add(c.ColumnName);
                    m.Info.Add(c.DataType.ToString());
                }
            }
            // FEATURE : serialize relations and constraints here

            return m;
        }

        private string GetXmlSchema(DataTable dt)
        {
            using (var writer = new StringWriter())
            {
                dt.WriteXmlSchema(writer);
                return dt.ToString();
            }
        }

        private void WriteDataset(DataSet ds)
        {
            _output.WriteByte(TOKENS.DOC_START);
            {
                WritePair("$schema", _params.UseOptimizedDatasetSchema ? (object)GetSchema(ds) : ds.GetXmlSchema());
                WriteComma();
            }
            bool tablesep = false;
            foreach (DataTable table in ds.Tables)
            {
                if (tablesep) WriteComma();
                tablesep = true;
                WriteDataTableData(table);
            }
            // end dataset
            _output.WriteByte(TOKENS.DOC_END);
        }

        private void WriteDataTableData(DataTable table)
        {
            WriteName(table.TableName);
            WriteColon();
            _output.WriteByte(TOKENS.ARRAY_START);
            DataColumnCollection cols = table.Columns;
            bool rowseparator = false;
            foreach (DataRow row in table.Rows)
            {
                if (rowseparator) WriteComma();
                rowseparator = true;
                _output.WriteByte(TOKENS.ARRAY_START);

                bool pendingSeperator = false;
                foreach (DataColumn column in cols)
                {
                    if (pendingSeperator) WriteComma();
                    WriteValue(row[column]);
                    pendingSeperator = true;
                }
                _output.WriteByte(TOKENS.ARRAY_END);
            }

            _output.WriteByte(TOKENS.ARRAY_END);
        }

        void WriteDataTable(DataTable dt)
        {
            _output.WriteByte(TOKENS.DOC_START);
            //if (this.useExtension)
            {
                this.WritePair("$schema", _params.UseOptimizedDatasetSchema ? (object)this.GetSchema(dt) : this.GetXmlSchema(dt));
                WriteComma();
            }

            WriteDataTableData(dt);

            // end datatable
            _output.WriteByte(TOKENS.DOC_END);
        }
#endif
        bool _TypesWritten = false;

        private void WriteObject(object obj)
        {
            if (_params.UsingGlobalTypes == false)
                _output.WriteByte(TOKENS.DOC_START);
            else
            {
                if (_TypesWritten == false)
                {
                    _output.WriteByte(TOKENS.DOC_START);
                    _before = _output;
                    _output = new MemoryStream();
                }
                else
                    _output.WriteByte(TOKENS.DOC_START);

            }
            _TypesWritten = true;
            _current_depth++;
            if (_current_depth > _MAX_DEPTH)
                throw new Exception("Serializer encountered maximum depth of " + _MAX_DEPTH);

            Type t = obj.GetType();
            bool append = false;
            if (_params.UseExtensions)
            {
                if (_params.UsingGlobalTypes == false)
                    WritePairFast("$type", Reflection.Instance.GetTypeAssemblyName(t));
                else
                {
                    int dt = 0;
                    string ct = Reflection.Instance.GetTypeAssemblyName(t);
                    if (_globalTypes.TryGetValue(ct, out dt) == false)
                    {
                        dt = _globalTypes.Count + 1;
                        _globalTypes.Add(ct, dt);
                    }
                    WritePairFast("$type", dt.ToString());
                }
                append = true;
            }

            List<Getters> g = Reflection.Instance.GetGetters(t, _params.ShowReadOnlyProperties);

            foreach (var p in g)
            {
                var o = p.Getter(obj);
                if ((o == null || o is DBNull) && _params.SerializeNulls == false)
                {
                    
                }
                else
                {
                    if (append)
                        WriteComma();
                    WritePair(p.Name, o);
                    append = true;
                }
            }
            _current_depth--;
            _output.WriteByte(TOKENS.DOC_END);
            _current_depth--;
        }

        private void WritePairFast(string name, string value)
        {
            if ((value == null) && _params.SerializeNulls == false)
                return;
            WriteName(name);

            WriteColon();

            WriteString(value);
        }

        private void WritePair(string name, object value)
        {
            if ((value == null || value is DBNull) && _params.SerializeNulls == false)
                return;
            WriteName(name);

            WriteColon();

            WriteValue(value);
        }

        private void WriteArray(IEnumerable array)
        {
            _output.WriteByte(TOKENS.ARRAY_START);

            bool pendingSeperator = false;

            foreach (object obj in array)
            {
                if (pendingSeperator) WriteComma();

                WriteValue(obj);

                pendingSeperator = true;
            }
            _output.WriteByte(TOKENS.ARRAY_END);
        }

        private void WriteStringDictionary(IDictionary dic)
        {
            _output.WriteByte(TOKENS.DOC_START);

            bool pendingSeparator = false;

            foreach (DictionaryEntry entry in dic)
            {
                if (pendingSeparator) WriteComma();

                WritePair((string)entry.Key, entry.Value);

                pendingSeparator = true;
            }
            _output.WriteByte(TOKENS.DOC_END);
        }

        private void WriteDictionary(IDictionary dic)
        {
            _output.WriteByte(TOKENS.ARRAY_START);

            bool pendingSeparator = false;

            foreach (DictionaryEntry entry in dic)
            {
                if (pendingSeparator) WriteComma();
                _output.WriteByte(TOKENS.DOC_START);
                WritePair("k", entry.Key);
                WriteComma();
                WritePair("v", entry.Value);
                _output.WriteByte(TOKENS.DOC_END);

                pendingSeparator = true;
            }
            _output.WriteByte(TOKENS.ARRAY_END);
        }

        private void WriteName(string s)
        {
            _output.WriteByte(TOKENS.NAME);
            byte[] b = BJSON.Instance.utf8.GetBytes(s);
            _output.WriteByte((byte)b.Length);
            _output.Write(b, 0, b.Length % 256);
        }

        private void WriteString(string s)
        {
            byte[] b = null;
            if (_params.UseUnicodeStrings)
            {
                _output.WriteByte(TOKENS.UNICODE_STRING);
                b = BJSON.Instance.unicode.GetBytes(s);
            }
            else
            {
                _output.WriteByte(TOKENS.STRING);
                b = BJSON.Instance.utf8.GetBytes(s);
            }
            _output.Write(Helper.GetBytes(b.Length, false), 0, 4);
            _output.Write(b, 0, b.Length);
        }
    }
}

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About the Author

Mehdi Gholam
Architect -
United Kingdom United Kingdom
Mehdi first started programming when he was 8 on BBC+128k machine in 6512 processor language, after various hardware and software changes he eventually came across .net and c# which he has been using since v1.0.
He is formally educated as a system analyst Industrial engineer, but his programming passion continues.

* Mehdi is the 5th person to get 6 out of 7 Platinum's on Code-Project (13th Jan'12)
* Mehdi is the 3rd person to get 7 out of 7 Platinum's on Code-Project (26th Aug'16)

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