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;
using fastJSON;
using RaptorDB.Common;
namespace fastBinaryJSON
{
internal 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 Array || obj is IList || obj is ICollection)
WriteArray((IEnumerable)obj);
else if (obj is Enum)
WriteEnum((Enum)obj);
#if CUSTOMTYPE
else if (JSON.Instance.IsTypeRegistered(obj.GetType()))
WriteCustom(obj);
#endif
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)
{
// FIX :
//_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);
}
#if CUSTOMTYPE
private void WriteCustom(object obj)
{
Serialize s;
JSON.Instance._customSerializer.TryGetValue(obj.GetType(), out s);
WriteStringFast(s(obj));
}
#endif
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;
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());
}
// TODO : 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());
}
}
// TODO : 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);
_output.Flush();
_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 (useExtension)
{
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);
foreach (var p in g)
{
if (append)
WriteComma();
var o = p.Getter(obj);
if ((o == null || o is DBNull) && _params.SerializeNulls == false)
append = false;
else
{
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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