SimpleJSON.cs

//#define USE_SharpZipLib
#if !UNITY_WEBPLAYER
#define USE_FileIO
#endif
/* * * * *
 * A simple JSON Parser / builder
 * ------------------------------
 * 
 * It mainly has been written as a simple JSON parser. It can build a JSON string
 * from the node-tree, or generate a node tree from any valid JSON string.
 * 
 * If you want to use compression when saving to file / stream / B64 you have to include
 * SharpZipLib ( http://www.icsharpcode.net/opensource/sharpziplib/ ) in your project and
 * define "USE_SharpZipLib" at the top of the file
 * 
 * Written by Bunny83 
 * 2012-06-09
 * 
 * Modified by oPless, 2014-09-21 to round-trip properly
 *
 * Features / attributes:
 * - provides strongly typed node classes and lists / dictionaries
 * - provides easy access to class members / array items / data values
 * - the parser ignores data types. Each value is a string.
 * - only double quotes (") are used for quoting strings.
 * - values and names are not restricted to quoted strings. They simply add up and are trimmed.
 * - There are only 3 types: arrays(JSONArray), objects(JSONClass) and values(JSONData)
 * - provides "casting" properties to easily convert to / from those types:
 *   int / float / double / bool
 * - provides a common interface for each node so no explicit casting is required.
 * - the parser try to avoid errors, but if malformed JSON is parsed the result is undefined
 * 
 * 
 * 2012-12-17 Update:
 * - Added internal JSONLazyCreator class which simplifies the construction of a JSON tree
 *   Now you can simple reference any item that doesn't exist yet and it will return a JSONLazyCreator
 *   The class determines the required type by it's further use, creates the type and removes itself.
 * - Added binary serialization / deserialization.
 * - Added support for BZip2 zipped binary format. Requires the SharpZipLib ( http://www.icsharpcode.net/opensource/sharpziplib/ )
 *   The usage of the SharpZipLib library can be disabled by removing or commenting out the USE_SharpZipLib define at the top
 * - The serializer uses different types when it comes to store the values. Since my data values
 *   are all of type string, the serializer will "try" which format fits best. The order is: int, float, double, bool, string.
 *   It's not the most efficient way but for a moderate amount of data it should work on all platforms.
 * 
 * * * * */
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;


namespace SimpleJSON
{
	public enum JSONBinaryTag
	{
		Array = 1,
		Class = 2,
		Value = 3,
		IntValue = 4,
		DoubleValue = 5,
		BoolValue = 6,
		FloatValue = 7,
	}

	public abstract class JSONNode
	{
		#region common interface

		public virtual void Add (string aKey, JSONNode aItem)
		{
		}

		public virtual JSONNode this [int aIndex]   { get { return null; } set { } }

		public virtual JSONNode this [string aKey]  { get { return null; } set { } }

		public virtual string Value                { get { return ""; } set { } }

		public virtual int Count                   { get { return 0; } }

		public virtual void Add (JSONNode aItem)
		{
			Add ("", aItem);
		}

		public virtual JSONNode Remove (string aKey)
		{
			return null;
		}

		public virtual JSONNode Remove (int aIndex)
		{
			return null;
		}

		public virtual JSONNode Remove (JSONNode aNode)
		{
			return aNode;
		}

		public virtual IEnumerable<JSONNode> Children
		{
			get {
				yield break;
			}
		}

		public IEnumerable<JSONNode> DeepChildren
		{
			get {
				foreach (var C in Children)
					foreach (var D in C.DeepChildren)
						yield return D;
			}
		}

		public override string ToString ()
		{
			return "JSONNode";
		}

		public virtual string ToString (string aPrefix)
		{
			return "JSONNode";
		}

		public abstract string ToJSON (int prefix);

		#endregion common interface

		#region typecasting properties

		public virtual JSONBinaryTag Tag { get; set; }

		public virtual int AsInt
		{
			get {
				int v = 0;
				if (int.TryParse (Value, out v))
					return v;
				return 0;
			}
			set {
				Value = value.ToString ();
				Tag = JSONBinaryTag.IntValue;
			}
		}

		public virtual float AsFloat
		{
			get {
				float v = 0.0f;
				if (float.TryParse (Value, out v))
					return v;
				return 0.0f;
			}
			set {
				Value = value.ToString ();
				Tag = JSONBinaryTag.FloatValue;
			}
		}

		public virtual double AsDouble
		{
			get {
				double v = 0.0;
				if (double.TryParse (Value, out v))
					return v;
				return 0.0;
			}
			set {
				Value = value.ToString ();
				Tag = JSONBinaryTag.DoubleValue;

			}
		}

		public virtual bool AsBool
		{
			get {
				bool v = false;
				if (bool.TryParse (Value, out v))
					return v;
				return !string.IsNullOrEmpty (Value);
			}
			set {
				Value = (value) ? "true" : "false";
				Tag = JSONBinaryTag.BoolValue;

			}
		}

		public virtual JSONArray AsArray
		{
			get {
				return this as JSONArray;
			}
		}

		public virtual JSONClass AsObject
		{
			get {
				return this as JSONClass;
			}
		}


		#endregion typecasting properties

		#region operators

		public static implicit operator JSONNode (string s)
		{
			return new JSONData (s);
		}

		public static implicit operator string (JSONNode d)
		{
			return (d == null) ? null : d.Value;
		}

		public static bool operator == (JSONNode a, object b)
		{
			if (b == null && a is JSONLazyCreator)
				return true;
			return System.Object.ReferenceEquals (a, b);
		}

		public static bool operator != (JSONNode a, object b)
		{
			return !(a == b);
		}

		public override bool Equals (object obj)
		{
			return System.Object.ReferenceEquals (this, obj);
		}

		public override int GetHashCode ()
		{
			return base.GetHashCode ();
		}


		#endregion operators

		internal static string Escape (string aText)
		{
			string result = "";
			foreach (char c in aText) {
				switch (c) {
				case '\\':
					result += "\\\\";
					break;
				case '\"':
					result += "\\\"";
					break;
				case '\n':
					result += "\\n";
					break;
				case '\r':
					result += "\\r";
					break;
				case '\t':
					result += "\\t";
					break;
				case '\b':
					result += "\\b";
					break;
				case '\f':
					result += "\\f";
					break;
				default   :
					result += c;
					break;
				}
			}
			return result;
		}

		static JSONData Numberize (string token)
		{
			bool flag = false;
			int integer = 0;
			double real = 0;

			if (int.TryParse (token, out integer)) {
				return new JSONData (integer);
			}

			if (double.TryParse (token, out real)) {
				return new JSONData (real);
			}

			if (bool.TryParse (token, out flag)) {
				return new JSONData (flag);
			}

			throw new NotImplementedException (token);
		}

		static void AddElement (JSONNode ctx, string token, string tokenName, bool tokenIsString)
		{
			if (tokenIsString) {
				if (ctx is JSONArray)
					ctx.Add (token);
				else
					ctx.Add (tokenName, token); // assume dictionary/object
			} else {
				JSONData number = Numberize (token);
				if (ctx is JSONArray)
					ctx.Add (number);
				else
					ctx.Add (tokenName, number);

			}
		}

		public static JSONNode Parse (string aJSON)
		{
			Stack<JSONNode> stack = new Stack<JSONNode> ();
			JSONNode ctx = null;
			int i = 0;
			string Token = "";
			string TokenName = "";
			bool QuoteMode = false;
			bool TokenIsString = false;
			while (i < aJSON.Length) {
				switch (aJSON [i]) {
				case '{':
					if (QuoteMode) {
						Token += aJSON [i];
						break;
					}
					stack.Push (new JSONClass ());
					if (ctx != null) {
						TokenName = TokenName.Trim ();
						if (ctx is JSONArray)
							ctx.Add (stack.Peek ());
						else if (TokenName != "")
							ctx.Add (TokenName, stack.Peek ());
					}
					TokenName = "";
					Token = "";
					ctx = stack.Peek ();
					break;

				case '[':
					if (QuoteMode) {
						Token += aJSON [i];
						break;
					}

					stack.Push (new JSONArray ());
					if (ctx != null) {
						TokenName = TokenName.Trim ();

						if (ctx is JSONArray)
							ctx.Add (stack.Peek ());
						else if (TokenName != "")
							ctx.Add (TokenName, stack.Peek ());
					}
					TokenName = "";
					Token = "";
					ctx = stack.Peek ();
					break;

				case '}':
				case ']':
					if (QuoteMode) {
						Token += aJSON [i];
						break;
					}
					if (stack.Count == 0)
						throw new Exception ("JSON Parse: Too many closing brackets");

					stack.Pop ();
					if (Token != "") {
						TokenName = TokenName.Trim ();
						/*
							if (ctx is JSONArray)
								ctx.Add (Token);
							else if (TokenName != "")
								ctx.Add (TokenName, Token);
								*/
						AddElement (ctx, Token, TokenName, TokenIsString);
						TokenIsString = false;
					}
					TokenName = "";
					Token = "";
					if (stack.Count > 0)
						ctx = stack.Peek ();
					break;

				case ':':
					if (QuoteMode) {
						Token += aJSON [i];
						break;
					}
					TokenName = Token;
					Token = "";
					TokenIsString = false;
					break;

				case '"':
					QuoteMode ^= true;
					TokenIsString = QuoteMode == true ? true : TokenIsString;
					break;

				case ',':
					if (QuoteMode) {
						Token += aJSON [i];
						break;
					}
					if (Token != "") {
						/*
							if (ctx is JSONArray) {
								ctx.Add (Token);
							} else if (TokenName != "") {
								ctx.Add (TokenName, Token);
							}
							*/
						AddElement (ctx, Token, TokenName, TokenIsString);
						TokenIsString = false;

					}
					TokenName = "";
					Token = "";
					TokenIsString = false;
					break;

				case '\r':
				case '\n':
					break;

				case ' ':
				case '\t':
					if (QuoteMode)
						Token += aJSON [i];
					break;

				case '\\':
					++i;
					if (QuoteMode) {
						char C = aJSON [i];
						switch (C) {
						case 't':
							Token += '\t';
							break;
						case 'r':
							Token += '\r';
							break;
						case 'n':
							Token += '\n';
							break;
						case 'b':
							Token += '\b';
							break;
						case 'f':
							Token += '\f';
							break;
						case 'u':
							{
								string s = aJSON.Substring (i + 1, 4);
								Token += (char)int.Parse (
									s,
									System.Globalization.NumberStyles.AllowHexSpecifier);
								i += 4;
								break;
							}
						default  :
							Token += C;
							break;
						}
					}
					break;

				default:
					Token += aJSON [i];
					break;
				}
				++i;
			}
			if (QuoteMode) {
				throw new Exception ("JSON Parse: Quotation marks seems to be messed up.");
			}
			return ctx;
		}

		public virtual void Serialize (System.IO.BinaryWriter aWriter)
		{
		}

		public void SaveToStream (System.IO.Stream aData)
		{
			var W = new System.IO.BinaryWriter (aData);
			Serialize (W);
		}

		#if USE_SharpZipLib
		public void SaveToCompressedStream(System.IO.Stream aData)
		{
		using (var gzipOut = new ICSharpCode.SharpZipLib.BZip2.BZip2OutputStream(aData))
		{
		gzipOut.IsStreamOwner = false;
		SaveToStream(gzipOut);
		gzipOut.Close();
		}
		}

		public void SaveToCompressedFile(string aFileName)
		{

		#if USE_FileIO
		System.IO.Directory.CreateDirectory((new System.IO.FileInfo(aFileName)).Directory.FullName);
		using(var F = System.IO.File.OpenWrite(aFileName))
		{
		SaveToCompressedStream(F);
		}

		#else
		throw new Exception("Can't use File IO stuff in webplayer");
		#endif
		}
		public string SaveToCompressedBase64()
		{
		using (var stream = new System.IO.MemoryStream())
		{
		SaveToCompressedStream(stream);
		stream.Position = 0;
		return System.Convert.ToBase64String(stream.ToArray());
		}
		}

		#else
		public void SaveToCompressedStream (System.IO.Stream aData)
		{
			throw new Exception ("Can't use compressed functions. You need include the SharpZipLib and uncomment the define at the top of SimpleJSON");
		}

		public void SaveToCompressedFile (string aFileName)
		{
			throw new Exception ("Can't use compressed functions. You need include the SharpZipLib and uncomment the define at the top of SimpleJSON");
		}

		public string SaveToCompressedBase64 ()
		{
			throw new Exception ("Can't use compressed functions. You need include the SharpZipLib and uncomment the define at the top of SimpleJSON");
		}
		#endif

		public void SaveToFile (string aFileName)
		{
			#if USE_FileIO
			System.IO.Directory.CreateDirectory ((new System.IO.FileInfo (aFileName)).Directory.FullName);
			using (var F = System.IO.File.OpenWrite (aFileName)) {
				SaveToStream (F);
			}
			#else
			throw new Exception ("Can't use File IO stuff in webplayer");
			#endif
		}

		public string SaveToBase64 ()
		{
			using (var stream = new System.IO.MemoryStream ()) {
				SaveToStream (stream);
				stream.Position = 0;
				return System.Convert.ToBase64String (stream.ToArray ());
			}
		}

		public static JSONNode Deserialize (System.IO.BinaryReader aReader)
		{
			JSONBinaryTag type = (JSONBinaryTag)aReader.ReadByte ();
			switch (type) {
			case JSONBinaryTag.Array:
				{
					int count = aReader.ReadInt32 ();
					JSONArray tmp = new JSONArray ();
					for (int i = 0; i < count; i++)
						tmp.Add (Deserialize (aReader));
					return tmp;
				}
			case JSONBinaryTag.Class:
				{
					int count = aReader.ReadInt32 ();                
					JSONClass tmp = new JSONClass ();
					for (int i = 0; i < count; i++) {
						string key = aReader.ReadString ();
						var val = Deserialize (aReader);
						tmp.Add (key, val);
					}
					return tmp;
				}
			case JSONBinaryTag.Value:
				{
					return new JSONData (aReader.ReadString ());
				}
			case JSONBinaryTag.IntValue:
				{
					return new JSONData (aReader.ReadInt32 ());
				}
			case JSONBinaryTag.DoubleValue:
				{
					return new JSONData (aReader.ReadDouble ());
				}
			case JSONBinaryTag.BoolValue:
				{
					return new JSONData (aReader.ReadBoolean ());
				}
			case JSONBinaryTag.FloatValue:
				{
					return new JSONData (aReader.ReadSingle ());
				}

			default:
				{
					throw new Exception ("Error deserializing JSON. Unknown tag: " + type);
				}
			}
		}

		#if USE_SharpZipLib
		public static JSONNode LoadFromCompressedStream(System.IO.Stream aData)
		{
		var zin = new ICSharpCode.SharpZipLib.BZip2.BZip2InputStream(aData);
		return LoadFromStream(zin);
		}
		public static JSONNode LoadFromCompressedFile(string aFileName)
		{
		#if USE_FileIO
		using(var F = System.IO.File.OpenRead(aFileName))
		{
		return LoadFromCompressedStream(F);
		}
		#else
		throw new Exception("Can't use File IO stuff in webplayer");
		#endif
		}
		public static JSONNode LoadFromCompressedBase64(string aBase64)
		{
		var tmp = System.Convert.FromBase64String(aBase64);
		var stream = new System.IO.MemoryStream(tmp);
		stream.Position = 0;
		return LoadFromCompressedStream(stream);
		}
		#else
		public static JSONNode LoadFromCompressedFile (string aFileName)
		{
			throw new Exception ("Can't use compressed functions. You need include the SharpZipLib and uncomment the define at the top of SimpleJSON");
		}

		public static JSONNode LoadFromCompressedStream (System.IO.Stream aData)
		{
			throw new Exception ("Can't use compressed functions. You need include the SharpZipLib and uncomment the define at the top of SimpleJSON");
		}

		public static JSONNode LoadFromCompressedBase64 (string aBase64)
		{
			throw new Exception ("Can't use compressed functions. You need include the SharpZipLib and uncomment the define at the top of SimpleJSON");
		}
		#endif

		public static JSONNode LoadFromStream (System.IO.Stream aData)
		{
			using (var R = new System.IO.BinaryReader (aData)) {
				return Deserialize (R);
			}
		}

		public static JSONNode LoadFromFile (string aFileName)
		{
			#if USE_FileIO
			using (var F = System.IO.File.OpenRead (aFileName)) {
				return LoadFromStream (F);
			}
			#else
			throw new Exception ("Can't use File IO stuff in webplayer");
			#endif
		}

		public static JSONNode LoadFromBase64 (string aBase64)
		{
			var tmp = System.Convert.FromBase64String (aBase64);
			var stream = new System.IO.MemoryStream (tmp);
			stream.Position = 0;
			return LoadFromStream (stream);
		}
	}
	// End of JSONNode

	public class JSONArray : JSONNode, IEnumerable
	{
		private List<JSONNode> m_List = new List<JSONNode> ();

		public override JSONNode this [int aIndex]
		{
			get {
				if (aIndex < 0 || aIndex >= m_List.Count)
					return new JSONLazyCreator (this);
				return m_List [aIndex];
			}
			set {
				if (aIndex < 0 || aIndex >= m_List.Count)
					m_List.Add (value);
				else
					m_List [aIndex] = value;
			}
		}

		public override JSONNode this [string aKey]
		{
			get{ return new JSONLazyCreator (this); }
			set{ m_List.Add (value); }
		}

		public override int Count
		{
			get { return m_List.Count; }
		}

		public override void Add (string aKey, JSONNode aItem)
		{
			m_List.Add (aItem);
		}

		public override JSONNode Remove (int aIndex)
		{
			if (aIndex < 0 || aIndex >= m_List.Count)
				return null;
			JSONNode tmp = m_List [aIndex];
			m_List.RemoveAt (aIndex);
			return tmp;
		}

		public override JSONNode Remove (JSONNode aNode)
		{
			m_List.Remove (aNode);
			return aNode;
		}

		public override IEnumerable<JSONNode> Children
		{
			get {
				foreach (JSONNode N in m_List)
					yield return N;
			}
		}

		public IEnumerator GetEnumerator ()
		{
			foreach (JSONNode N in m_List)
				yield return N;
		}

		public override string ToString ()
		{
			string result = "[ ";
			foreach (JSONNode N in m_List) {
				if (result.Length > 2)
					result += ", ";
				result += N.ToString ();
			}
			result += " ]";
			return result;
		}

		public override string ToString (string aPrefix)
		{
			string result = "[ ";
			foreach (JSONNode N in m_List) {
				if (result.Length > 3)
					result += ", ";
				result += "\n" + aPrefix + "   ";                
				result += N.ToString (aPrefix + "   ");
			}
			result += "\n" + aPrefix + "]";
			return result;
		}

		public override string ToJSON (int prefix)
		{
			string s = new string (' ', (prefix + 1) * 2);
			string ret = "[ ";
			foreach (JSONNode n in m_List) {
				if (ret.Length > 3)
					ret += ", ";
				ret += "\n" + s;
				ret += n.ToJSON (prefix + 1);

			}
			ret += "\n" + s + "]";
			return ret;
		}

		public override void Serialize (System.IO.BinaryWriter aWriter)
		{
			aWriter.Write ((byte)JSONBinaryTag.Array);
			aWriter.Write (m_List.Count);
			for (int i = 0; i < m_List.Count; i++) {
				m_List [i].Serialize (aWriter);
			}
		}
	}
	// End of JSONArray

	public class JSONClass : JSONNode, IEnumerable
	{
		private Dictionary<string,JSONNode> m_Dict = new Dictionary<string,JSONNode> ();

		public Dictionary<string,JSONNode> Dict {
			get {
				return m_Dict;
			}
		}

		public override JSONNode this [string aKey]
		{
			get {
				if (m_Dict.ContainsKey (aKey))
					return m_Dict [aKey];
				else
					return new JSONLazyCreator (this, aKey);
			}
			set {
				if (m_Dict.ContainsKey (aKey))
					m_Dict [aKey] = value;
				else
					m_Dict.Add (aKey, value);
			}
		}

		public override JSONNode this [int aIndex]
		{
			get {
				if (aIndex < 0 || aIndex >= m_Dict.Count)
					return null;
				return m_Dict.ElementAt (aIndex).Value;
			}
			set {
				if (aIndex < 0 || aIndex >= m_Dict.Count)
					return;
				string key = m_Dict.ElementAt (aIndex).Key;
				m_Dict [key] = value;
			}
		}

		public override int Count
		{
			get { return m_Dict.Count; }
		}


		public override void Add (string aKey, JSONNode aItem)
		{
			if (!string.IsNullOrEmpty (aKey)) {
				if (m_Dict.ContainsKey (aKey))
					m_Dict [aKey] = aItem;
				else
					m_Dict.Add (aKey, aItem);
			} else
				m_Dict.Add (Guid.NewGuid ().ToString (), aItem);
		}

		public override JSONNode Remove (string aKey)
		{
			if (!m_Dict.ContainsKey (aKey))
				return null;
			JSONNode tmp = m_Dict [aKey];
			m_Dict.Remove (aKey);
			return tmp;        
		}

		public override JSONNode Remove (int aIndex)
		{
			if (aIndex < 0 || aIndex >= m_Dict.Count)
				return null;
			var item = m_Dict.ElementAt (aIndex);
			m_Dict.Remove (item.Key);
			return item.Value;
		}

		public override JSONNode Remove (JSONNode aNode)
		{
			try {
				var item = m_Dict.Where (k => k.Value == aNode).First ();
				m_Dict.Remove (item.Key);
				return aNode;
			} catch {
				return null;
			}
		}

		public override IEnumerable<JSONNode> Children
		{
			get {
				foreach (KeyValuePair<string,JSONNode> N in m_Dict)
					yield return N.Value;
			}
		}

		public IEnumerator GetEnumerator ()
		{
			foreach (KeyValuePair<string, JSONNode> N in m_Dict)
				yield return N;
		}

		public override string ToString ()
		{
			string result = "{";
			foreach (KeyValuePair<string, JSONNode> N in m_Dict) {
				if (result.Length > 2)
					result += ", ";
				result += "\"" + Escape (N.Key) + "\":" + N.Value.ToString ();
			}
			result += "}";
			return result;
		}

		public override string ToString (string aPrefix)
		{
			string result = "{ ";
			foreach (KeyValuePair<string, JSONNode> N in m_Dict) {
				if (result.Length > 3)
					result += ", ";
				result += "\n" + aPrefix + "   ";
				result += "\"" + Escape (N.Key) + "\" : " + N.Value.ToString (aPrefix + "   ");
			}
			result += "\n" + aPrefix + "}";
			return result;
		}

		public override string ToJSON (int prefix)
		{
			string s = new string (' ', (prefix + 1) * 2);
			string ret = "{ ";
			foreach (KeyValuePair<string,JSONNode> n in m_Dict) {
				if (ret.Length > 3)
					ret += ", ";
				ret += "\n" + s;
				ret += string.Format ("\"{0}\": {1}", n.Key, n.Value.ToJSON (prefix + 1));
			}
			ret += "\n" + s + "}";
			return ret;
		}

		public override void Serialize (System.IO.BinaryWriter aWriter)
		{
			aWriter.Write ((byte)JSONBinaryTag.Class);
			aWriter.Write (m_Dict.Count);
			foreach (string K in m_Dict.Keys) {
				aWriter.Write (K);
				m_Dict [K].Serialize (aWriter);
			}
		}
	}
	// End of JSONClass

	public class JSONData : JSONNode
	{
		private string m_Data;


		public override string Value
		{
			get { return m_Data; }
			set {
				m_Data = value;
				Tag = JSONBinaryTag.Value;
			}
		}

		public JSONData (string aData)
		{
			m_Data = aData;
			Tag = JSONBinaryTag.Value;
		}

		public JSONData (float aData)
		{
			AsFloat = aData;
			Tag = JSONBinaryTag.FloatValue;
		}

		public JSONData (double aData)
		{
			AsDouble = aData;
			Tag = JSONBinaryTag.DoubleValue;
		}

		public JSONData (bool aData)
		{
			AsBool = aData;
			Tag = JSONBinaryTag.BoolValue;
		}

		public JSONData (int aData)
		{
			AsInt = aData;
			Tag = JSONBinaryTag.IntValue;
		}

		public override string ToString ()
		{
			return "\"" + Escape (m_Data) + "\"";
		}

		public override string ToString (string aPrefix)
		{
			return "\"" + Escape (m_Data) + "\"";
		}

		public override string ToJSON (int prefix)
		{
			switch (Tag) {
			case JSONBinaryTag.DoubleValue:
			case JSONBinaryTag.FloatValue:
			case JSONBinaryTag.IntValue:
			case JSONBinaryTag.BoolValue:
				return m_Data;
			case JSONBinaryTag.Value:
				return string.Format ("\"{0}\"", Escape (m_Data));
			default:
				throw new NotSupportedException ("This shouldn't be here: " + Tag.ToString ());
			}
		}

		public override void Serialize (System.IO.BinaryWriter aWriter)
		{
			var tmp = new JSONData ("");

			tmp.AsInt = AsInt;
			if (tmp.m_Data == this.m_Data) {
				aWriter.Write ((byte)JSONBinaryTag.IntValue);
				aWriter.Write (AsInt);
				return;
			}
			tmp.AsFloat = AsFloat;
			if (tmp.m_Data == this.m_Data) {
				aWriter.Write ((byte)JSONBinaryTag.FloatValue);
				aWriter.Write (AsFloat);
				return;
			}
			tmp.AsDouble = AsDouble;
			if (tmp.m_Data == this.m_Data) {
				aWriter.Write ((byte)JSONBinaryTag.DoubleValue);
				aWriter.Write (AsDouble);
				return;
			}

			tmp.AsBool = AsBool;
			if (tmp.m_Data == this.m_Data) {
				aWriter.Write ((byte)JSONBinaryTag.BoolValue);
				aWriter.Write (AsBool);
				return;
			}
			aWriter.Write ((byte)JSONBinaryTag.Value);
			aWriter.Write (m_Data);
		}
	}
	// End of JSONData

	internal class JSONLazyCreator : JSONNode
	{
		private JSONNode m_Node = null;
		private string m_Key = null;

		public JSONLazyCreator (JSONNode aNode)
		{
			m_Node = aNode;
			m_Key = null;
		}

		public JSONLazyCreator (JSONNode aNode, string aKey)
		{
			m_Node = aNode;
			m_Key = aKey;
		}

		private void Set (JSONNode aVal)
		{
			if (m_Key == null) {
				m_Node.Add (aVal);
			} else {
				m_Node.Add (m_Key, aVal);
			}
			m_Node = null; // Be GC friendly.
		}

		public override JSONNode this [int aIndex]
		{
			get {
				return new JSONLazyCreator (this);
			}
			set {
				var tmp = new JSONArray ();
				tmp.Add (value);
				Set (tmp);
			}
		}

		public override JSONNode this [string aKey]
		{
			get {
				return new JSONLazyCreator (this, aKey);
			}
			set {
				var tmp = new JSONClass ();
				tmp.Add (aKey, value);
				Set (tmp);
			}
		}

		public override void Add (JSONNode aItem)
		{
			var tmp = new JSONArray ();
			tmp.Add (aItem);
			Set (tmp);
		}

		public override void Add (string aKey, JSONNode aItem)
		{
			var tmp = new JSONClass ();
			tmp.Add (aKey, aItem);
			Set (tmp);
		}

		public static bool operator == (JSONLazyCreator a, object b)
		{
			if (b == null)
				return true;
			return System.Object.ReferenceEquals (a, b);
		}

		public static bool operator != (JSONLazyCreator a, object b)
		{
			return !(a == b);
		}

		public override bool Equals (object obj)
		{
			if (obj == null)
				return true;
			return System.Object.ReferenceEquals (this, obj);
		}

		public override int GetHashCode ()
		{
			return base.GetHashCode ();
		}

		public override string ToString ()
		{
			return "";
		}

		public override string ToString (string aPrefix)
		{
			return "";
		}

		public override string ToJSON (int prefix)
		{
			return "";
		}

		public override int AsInt
		{
			get {
				JSONData tmp = new JSONData (0);
				Set (tmp);
				return 0;
			}
			set {
				JSONData tmp = new JSONData (value);
				Set (tmp);
			}
		}

		public override float AsFloat
		{
			get {
				JSONData tmp = new JSONData (0.0f);
				Set (tmp);
				return 0.0f;
			}
			set {
				JSONData tmp = new JSONData (value);
				Set (tmp);
			}
		}

		public override double AsDouble
		{
			get {
				JSONData tmp = new JSONData (0.0);
				Set (tmp);
				return 0.0;
			}
			set {
				JSONData tmp = new JSONData (value);
				Set (tmp);
			}
		}

		public override bool AsBool
		{
			get {
				JSONData tmp = new JSONData (false);
				Set (tmp);
				return false;
			}
			set {
				JSONData tmp = new JSONData (value);
				Set (tmp);
			}
		}

		public override JSONArray AsArray
		{
			get {
				JSONArray tmp = new JSONArray ();
				Set (tmp);
				return tmp;
			}
		}

		public override JSONClass AsObject
		{
			get {
				JSONClass tmp = new JSONClass ();
				Set (tmp);
				return tmp;
			}
		}
	}
	// End of JSONLazyCreator

	public static class JSON
	{
		public static JSONNode Parse (string aJSON)
		{
			return JSONNode.Parse (aJSON);
		}
	}
}