Radarr/Exceptron.Client/fastJSON/JsonSerializer.cs

520 lines
15 KiB
C#
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2013-06-06 04:33:16 +00:00
//http://fastjson.codeplex.com/
//http://fastjson.codeplex.com/license
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Globalization;
using System.IO;
using System.Text;
namespace Exceptron.Client.fastJSON
{
internal class JSONSerializer
{
private readonly StringBuilder _output = new StringBuilder();
readonly bool useMinimalDataSetSchema;
readonly bool fastguid = true;
readonly bool useExtension = true;
readonly bool serializeNulls = true;
readonly int _MAX_DEPTH = 10;
readonly bool _Indent;
readonly bool _useGlobalTypes = true;
int _current_depth;
private readonly Dictionary<string, int> _globalTypes = new Dictionary<string, int>();
internal JSONSerializer(bool UseMinimalDataSetSchema, bool UseFastGuid, bool UseExtensions, bool SerializeNulls, bool IndentOutput)
{
useMinimalDataSetSchema = UseMinimalDataSetSchema;
fastguid = UseFastGuid;
useExtension = UseExtensions;
_Indent = IndentOutput;
serializeNulls = SerializeNulls;
if (useExtension == false)
_useGlobalTypes = false;
}
internal string ConvertToJSON(object obj)
{
WriteValue(obj);
string str = "";
if (_useGlobalTypes)
{
StringBuilder sb = new StringBuilder();
sb.Append("{\"$types\":{");
bool pendingSeparator = false;
foreach (var kv in _globalTypes)
{
if (pendingSeparator) sb.Append(',');
pendingSeparator = true;
sb.Append("\"");
sb.Append(kv.Key);
sb.Append("\":\"");
sb.Append(kv.Value);
sb.Append("\"");
}
sb.Append("},");
str = sb + _output.ToString();
}
else
str = _output.ToString();
return str;
}
private void WriteValue(object obj)
{
if (obj == null || obj is DBNull)
_output.Append("null");
else if (obj is string || obj is char)
WriteString((string)obj);
else if (obj is Guid)
WriteGuid((Guid)obj);
else if (obj is bool)
_output.Append(((bool)obj) ? "true" : "false"); // conform to standard
else if (
obj is int || obj is long || obj is double ||
obj is decimal || obj is float ||
obj is byte || obj is short ||
obj is sbyte || obj is ushort ||
obj is uint || obj is ulong
)
_output.Append(((IConvertible)obj).ToString(NumberFormatInfo.InvariantInfo));
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)
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);
}
#if CUSTOMTYPE
private void WriteCustom(object obj)
{
Serialize s;
JSON.Instance._customSerializer.TryGetValue(obj.GetType(), out s);
WriteStringFast(s(obj));
}
#endif
private void WriteEnum(Enum e)
{
// TODO : optimize enum write
WriteStringFast(e.ToString());
}
private void WriteGuid(Guid g)
{
if (fastguid == false)
WriteStringFast(g.ToString());
else
WriteBytes(g.ToByteArray());
}
private void WriteBytes(byte[] bytes)
{
#if !SILVERLIGHT
WriteStringFast(Convert.ToBase64String(bytes, 0, bytes.Length, Base64FormattingOptions.None));
#else
WriteStringFast(Convert.ToBase64String(bytes, 0, bytes.Length));
#endif
}
private void WriteDateTime(DateTime dateTime)
{
// datetime format standard : yyyy-MM-dd HH:mm:ss
DateTime dt = dateTime;
if (JSON.Instance.UseUTCDateTime)
dt = dateTime.ToUniversalTime();
_output.Append("\"");
_output.Append(dt.Year.ToString("0000", NumberFormatInfo.InvariantInfo));
_output.Append("-");
_output.Append(dt.Month.ToString("00", NumberFormatInfo.InvariantInfo));
_output.Append("-");
_output.Append(dt.Day.ToString("00", NumberFormatInfo.InvariantInfo));
_output.Append(" ");
_output.Append(dt.Hour.ToString("00", NumberFormatInfo.InvariantInfo));
_output.Append(":");
_output.Append(dt.Minute.ToString("00", NumberFormatInfo.InvariantInfo));
_output.Append(":");
_output.Append(dt.Second.ToString("00", NumberFormatInfo.InvariantInfo));
if (JSON.Instance.UseUTCDateTime)
_output.Append("Z");
_output.Append("\"");
}
#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.Append('{');
if (useExtension)
{
WritePair("$schema", useMinimalDataSetSchema ? (object)GetSchema(ds) : ds.GetXmlSchema());
_output.Append(',');
}
bool tablesep = false;
foreach (DataTable table in ds.Tables)
{
if (tablesep) _output.Append(",");
tablesep = true;
WriteDataTableData(table);
}
// end dataset
_output.Append('}');
}
private void WriteDataTableData(DataTable table)
{
_output.Append('\"');
_output.Append(table.TableName);
_output.Append("\":[");
DataColumnCollection cols = table.Columns;
bool rowseparator = false;
foreach (DataRow row in table.Rows)
{
if (rowseparator) _output.Append(",");
rowseparator = true;
_output.Append('[');
bool pendingSeperator = false;
foreach (DataColumn column in cols)
{
if (pendingSeperator) _output.Append(',');
WriteValue(row[column]);
pendingSeperator = true;
}
_output.Append(']');
}
_output.Append(']');
}
void WriteDataTable(DataTable dt)
{
_output.Append('{');
if (useExtension)
{
WritePair("$schema", useMinimalDataSetSchema ? (object)GetSchema(dt) : GetXmlSchema(dt));
_output.Append(',');
}
WriteDataTableData(dt);
// end datatable
_output.Append('}');
}
#endif
bool _firstWritten;
private void WriteObject(object obj)
{
Indent();
if (_useGlobalTypes == false)
_output.Append('{');
else
{
if (_firstWritten)
_output.Append("{");
}
_firstWritten = true;
_current_depth++;
if (_current_depth > _MAX_DEPTH)
throw new Exception("Serializer encountered maximum depth of " + _MAX_DEPTH);
var map = new Dictionary<string, string>();
Type t = obj.GetType();
bool append = false;
if (useExtension)
{
if (_useGlobalTypes == false)
WritePairFast("$type", JSON.Instance.GetTypeAssemblyName(t));
else
{
int dt = 0;
string ct = JSON.Instance.GetTypeAssemblyName(t);
if (_globalTypes.TryGetValue(ct, out dt) == false)
{
dt = _globalTypes.Count + 1;
_globalTypes.Add(ct, dt);
}
WritePairFast("$type", dt.ToString());
}
append = true;
}
var g = JSON.Instance.GetGetters(t);
foreach (var p in g)
{
if (append)
_output.Append(',');
object o = p.Getter(obj);
if ((o == null || o is DBNull) && serializeNulls == false)
append = false;
else
{
WritePair(p.Name, o);
if (o != null && useExtension)
{
Type tt = o.GetType();
if (tt == typeof(Object))
map.Add(p.Name, tt.ToString());
}
append = true;
}
}
if (map.Count > 0 && useExtension)
{
_output.Append(",\"$map\":");
WriteStringDictionary(map);
}
_current_depth--;
Indent();
_output.Append('}');
_current_depth--;
}
private void Indent()
{
Indent(false);
}
private void Indent(bool dec)
{
if (_Indent)
{
_output.Append("\r\n");
for (int i = 0; i < _current_depth - (dec ? 1 : 0); i++)
_output.Append("\t");
}
}
private void WritePairFast(string name, string value)
{
if ((value == null) && serializeNulls == false)
return;
Indent();
WriteStringFast(name);
_output.Append(':');
WriteStringFast(value);
}
private void WritePair(string name, object value)
{
if ((value == null || value is DBNull) && serializeNulls == false)
return;
Indent();
WriteStringFast(name);
_output.Append(':');
WriteValue(value);
}
private void WriteArray(IEnumerable array)
{
Indent();
_output.Append('[');
bool pendingSeperator = false;
foreach (var obj in array)
{
Indent();
if (pendingSeperator) _output.Append(',');
WriteValue(obj);
pendingSeperator = true;
}
Indent();
_output.Append(']');
}
private void WriteStringDictionary(IDictionary dic)
{
Indent();
_output.Append('{');
bool pendingSeparator = false;
foreach (DictionaryEntry entry in dic)
{
if (pendingSeparator) _output.Append(',');
WritePair((string)entry.Key, entry.Value);
pendingSeparator = true;
}
Indent();
_output.Append('}');
}
private void WriteDictionary(IDictionary dic)
{
Indent();
_output.Append('[');
bool pendingSeparator = false;
foreach (DictionaryEntry entry in dic)
{
if (pendingSeparator) _output.Append(',');
Indent();
_output.Append('{');
WritePair("k", entry.Key);
_output.Append(",");
WritePair("v", entry.Value);
Indent();
_output.Append('}');
pendingSeparator = true;
}
Indent();
_output.Append(']');
}
private void WriteStringFast(string s)
{
//Indent();
_output.Append('\"');
_output.Append(s);
_output.Append('\"');
}
private void WriteString(string s)
{
//Indent();
_output.Append('\"');
int runIndex = -1;
for (var index = 0; index < s.Length; ++index)
{
var c = s[index];
if (c >= ' ' && c < 128 && c != '\"' && c != '\\')
{
if (runIndex == -1)
{
runIndex = index;
}
continue;
}
if (runIndex != -1)
{
_output.Append(s, runIndex, index - runIndex);
runIndex = -1;
}
switch (c)
{
case '\t': _output.Append("\\t"); break;
case '\r': _output.Append("\\r"); break;
case '\n': _output.Append("\\n"); break;
case '"':
case '\\': _output.Append('\\'); _output.Append(c); break;
default:
_output.Append("\\u");
_output.Append(((int)c).ToString("X4", NumberFormatInfo.InvariantInfo));
break;
}
}
if (runIndex != -1)
{
_output.Append(s, runIndex, s.Length - runIndex);
}
_output.Append('\"');
}
}
}