// returns Object of type tt, or ToObjectError, or null if tk == JNotPresent.
// ignoreerrors means don't worry if individual fields are wrong type in json vs in classes/dictionaries
// checkcustomattr check for custom attributes - this takes time so you may want to turn it off
// will return an instance of tt or ToObjectError, or null for token is null
// this may except in unusual circumstances (which i've not found yet, but there are dynamic type changes in there)
public static Object ToObject(this JToken tk, Type tt, bool ignoretypeerrors, bool checkcustomattr)
{
if (tk == null)
{
return(null);
}
else if (tk.IsArray)
{
JArray jarray = (JArray)tk;
if (tt.IsArray)
{
dynamic instance = Activator.CreateInstance(tt, tk.Count); // dynamic holder for instance of array[]
for (int i = 0; i < tk.Count; i++)
{
Object ret = ToObject(tk[i], tt.GetElementType(), ignoretypeerrors, checkcustomattr); // get the underlying element, must match array element type
if (ret != null && ret.GetType() == typeof(ToObjectError)) // arrays must be full, any errors means an error
{
((ToObjectError)ret).PropertyName = tt.Name + "." + i.ToString() + "." + ((ToObjectError)ret).PropertyName;
return(ret);
}
else
{
dynamic d = tt.GetElementType().ChangeTo(ret);
instance[i] = d;
}
}
return(instance);
}
else if (typeof(System.Collections.IList).IsAssignableFrom(tt))
{
dynamic instance = Activator.CreateInstance(tt); // create the List
var types = tt.GetGenericArguments();
for (int i = 0; i < tk.Count; i++)
{
Object ret = ToObject(tk[i], types[0], ignoretypeerrors, checkcustomattr); // get the underlying element, must match types[0] which is list type
if (ret != null && ret.GetType() == typeof(ToObjectError)) // lists must be full, any errors are errors
{
((ToObjectError)ret).PropertyName = tt.Name + "." + i.ToString() + "." + ((ToObjectError)ret).PropertyName;
return(ret);
}
else
{
dynamic d = types[0].ChangeTo(ret);
instance.Add(d);
}
}
return(instance);
}
else
{
return(new ToObjectError("JSONToObject: Not array"));
}
}
else if (tk.TokenType == JToken.TType.Object) // objects are best efforts.. fills in as many fields as possible
{
if (typeof(System.Collections.IDictionary).IsAssignableFrom(tt)) // if its a Dictionary<x,y> then expect a set of objects
{
dynamic instance = Activator.CreateInstance(tt); // create the class, so class must has a constructor with no paras
var types = tt.GetGenericArguments();
foreach (var kvp in (JObject)tk)
{
Object ret = ToObject(kvp.Value, types[1], ignoretypeerrors, checkcustomattr); // get the value as the dictionary type - it must match type or it get OE
if (ret != null && ret.GetType() == typeof(ToObjectError))
{
((ToObjectError)ret).PropertyName = tt.Name + "." + kvp.Key + "." + ((ToObjectError)ret).PropertyName;
if (ignoretypeerrors)
{
System.Diagnostics.Debug.WriteLine("Ignoring Object error:" + ((ToObjectError)ret).ErrorString + ":" + ((ToObjectError)ret).PropertyName);
}
else
{
return(ret);
}
}
else
{
dynamic d = types[1].ChangeTo(ret);
instance[kvp.Key] = d;
}
}
return(instance);
}
else if (tt.IsClass || // if class
(tt.IsValueType && !tt.IsPrimitive && !tt.IsEnum && tt != typeof(DateTime))) // or struct, but not datetime (handled below)
{
var instance = Activator.CreateInstance(tt); // create the class, so class must has a constructor with no paras
System.Reflection.MemberInfo[] fi = tt.GetFields(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Static |
System.Reflection.BindingFlags.Public);
string[] finames = null;
System.Reflection.MemberInfo[] pi = null; // lazy load this
string[] pinames = null;
if (checkcustomattr)
{
finames = new string[fi.Length];
for (int i = 0; i < fi.Length; i++)
{
var rename = fi[i].GetCustomAttributes(typeof(JsonNameAttribute), false);
finames[i] = rename.Length == 1 ? (string)((dynamic)rename[0]).Name : fi[i].Name;
}
}
foreach (var kvp in (JObject)tk)
{
System.Reflection.MemberInfo mi = null;
var fipos = finames != null?System.Array.IndexOf(finames, kvp.Key) : System.Array.FindIndex(fi, x => x.Name == kvp.Key);
if (fipos >= 0) // try and find field first..
{
mi = fi[fipos];
}
else
{
if (pi == null) // lazy load pick up, only load these if fields not found
{
pi = tt.GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Static |
System.Reflection.BindingFlags.Public);
if (checkcustomattr)
{
pinames = new string[pi.Length];
for (int i = 0; i < pi.Length; i++)
{
var rename = pi[i].GetCustomAttributes(typeof(JsonNameAttribute), false);
pinames[i] = rename.Length == 1 ? (string)((dynamic)rename[0]).Name : pi[i].Name;
}
}
}
var pipos = pinames != null?System.Array.IndexOf(pinames, kvp.Key) : System.Array.FindIndex(pi, x => x.Name == kvp.Key);
if (pipos >= 0)
{
mi = pi[pipos];
}
}
if (mi != null) // if we found a class member
{
var ca = checkcustomattr ? mi.GetCustomAttributes(typeof(JsonIgnoreAttribute), false) : null;
if (ca == null || ca.Length == 0) // ignore any ones with JsonIgnore on it.
{
Type otype = mi.FieldPropertyType();
if (otype != null) // and its a field or property
{
Object ret = ToObject(kvp.Value, otype, ignoretypeerrors, checkcustomattr); // get the value - must match otype.. ret may be zero for ? types
if (ret != null && ret.GetType() == typeof(ToObjectError))
{
((ToObjectError)ret).PropertyName = tt.Name + "." + kvp.Key + "." + ((ToObjectError)ret).PropertyName;
if (ignoretypeerrors)
{
System.Diagnostics.Debug.WriteLine("Ignoring Object error:" + ((ToObjectError)ret).ErrorString + ":" + ((ToObjectError)ret).PropertyName);
}
else
{
return(ret);
}
}
else
{
if (!mi.SetValue(instance, ret)) // and set. Set will fail if the property is get only
{
if (ignoretypeerrors)
{
System.Diagnostics.Debug.WriteLine("Ignoring cannot set value on property " + mi.Name);
}
else
{
return(new ToObjectError("Cannot set value on property " + mi.Name));
}
}
}
}
}
}
else
{
System.Diagnostics.Debug.WriteLine("JSONToObject: No such member " + kvp.Key + " in " + tt.Name);
}
}
return(instance);
}
else
{
return(new ToObjectError("JSONToObject: Not class"));
}
}
else
{
string name = tt.Name; // compare by name quicker than is
if (name.Equals("Nullable`1")) // nullable types
{
if (tk.IsNull)
{
return(null);
}
name = tt.GenericTypeArguments[0].Name; // get underlying type..
}
if (name.Equals("String")) // copies of QuickJSON explicit operators in QuickJSON.cs
{
if (tk.IsNull)
{
return(null);
}
else if (tk.IsString)
{
return(tk.Value);
}
}
else if (name.Equals("Int32"))
{
if (tk.TokenType == TType.Long) // it won't be a ulong/bigint since that would be too big for an int
{
return((int)(long)tk.Value);
}
else if (tk.TokenType == TType.Double) // doubles get trunced.. as per previous system
{
return((int)(double)tk.Value);
}
}
else if (name.Equals("Int64"))
{
if (tk.TokenType == TType.Long)
{
return(tk.Value);
}
else if (tk.TokenType == TType.Double)
{
return((long)(double)tk.Value);
}
}
else if (name.Equals("Boolean"))
{
if (tk.TokenType == TType.Boolean)
{
return((bool)tk.Value);
}
else if (tk.TokenType == TType.Long)
{
return((long)tk.Value != 0);
}
}
else if (name.Equals("Double"))
{
if (tk.TokenType == TType.Long)
{
return((double)(long)tk.Value);
}
else if (tk.TokenType == TType.ULong)
{
return((double)(ulong)tk.Value);
}
#if JSONBIGINT
else if (tk.TokenType == TType.BigInt)
{
return((double)(System.Numerics.BigInteger)tk.Value);
}
#endif
else if (tk.TokenType == TType.Double)
{
return((double)tk.Value);
}
}
else if (name.Equals("Single"))
{
if (tk.TokenType == TType.Long)
{
return((float)(long)tk.Value);
}
else if (tk.TokenType == TType.ULong)
{
return((float)(ulong)tk.Value);
}
#if JSONBIGINT
else if (tk.TokenType == TType.BigInt)
{
return((float)(System.Numerics.BigInteger)tk.Value);
}
#endif
else if (tk.TokenType == TType.Double)
{
return((float)(double)tk.Value);
}
}
else if (name.Equals("UInt32"))
{
if (tk.TokenType == TType.Long && (long)tk.Value >= 0)
{
return((uint)(long)tk.Value);
}
else if (tk.TokenType == TType.Double && (double)tk.Value >= 0)
{
return((uint)(double)tk.Value);
}
}
else if (name.Equals("UInt64"))
{
if (tk.TokenType == TType.ULong)
{
return((ulong)tk.Value);
}
else if (tk.TokenType == TType.Long && (long)tk.Value >= 0)
{
return((ulong)(long)tk.Value);
}
else if (tk.TokenType == TType.Double && (double)tk.Value >= 0)
{
return((ulong)(double)tk.Value);
}
}
else if (name.Equals("DateTime"))
{
DateTime?dt = tk.DateTime(System.Globalization.CultureInfo.InvariantCulture);
if (dt != null)
{
return(dt);
}
}
else if (tt.IsEnum)
{
if (!tk.IsString)
{
return(null);
}
try
{
Object p = Enum.Parse(tt, tk.Str(), true);
return(Convert.ChangeType(p, tt));
}
catch
{
System.Diagnostics.Debug.WriteLine("Unable to convert to enum " + tk.Str());
return(null);
}
}
return(new ToObjectError("JSONToObject: Bad Conversion " + tk.TokenType + " to " + tt.Name));
}
}
