private Func <object, Value> BuildProtoConverter()
{
// Create reusable JsonSerializer to reduce allocations
var jsonSettings = new Newtonsoft.Json.JsonSerializerSettings()
{
ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
};
jsonSettings.Converters.Add(new Newtonsoft.Json.Converters.StringEnumConverter());
var jsonSerializer = Newtonsoft.Json.JsonSerializer.CreateDefault(jsonSettings);
return(o => {
try
{
switch (Convert.GetTypeCode(o))
{
case TypeCode.Empty:
return Value.ForNull();
case TypeCode.Boolean:
return Value.ForBool((bool)o);
case TypeCode.Decimal:
case TypeCode.Double:
case TypeCode.Single:
return Value.ForNumber(Convert.ToDouble(o));
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.UInt16:
case TypeCode.Int32:
case TypeCode.UInt32:
case TypeCode.Int64:
case TypeCode.UInt64:
if (o is System.Enum)
{
break; // Let StringEnumConverter handle formatting
}
return Value.ForNumber(Convert.ToDouble(o));
case TypeCode.String:
return Value.ForString((string)o);
case TypeCode.Char:
return Value.ForString(o.ToString());
}
return ProtoConverter.Convert(JToken.FromObject(o, jsonSerializer));
}
catch
{
// Reset the JsonSerializer as it now can be in a bad state
jsonSerializer = Newtonsoft.Json.JsonSerializer.CreateDefault(jsonSettings);
throw;
}
});
}
private Func <object, Value> BuildAndVerifyJsonConverter()
{
var type = System.Type.GetType(JsonConverterTypeName, throwOnError: false);
GaxPreconditions.CheckState(type != null, "A type with the specified name cannot be found: '{0}'", JsonConverterTypeName);
var methodInfo = type.GetTypeInfo()
.GetMethods(BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance)
.Where(m => m.Name == JsonConverterMethodName && !m.IsAbstract && !m.IsGenericMethod &&
m.GetParameters().Length == 1 && m.GetParameters()[0].ParameterType == typeof(object) &&
(m.ReturnType == typeof(Value) || typeof(JToken).IsAssignableFrom(m.ReturnType)))
.FirstOrDefault();
GaxPreconditions.CheckState(methodInfo != null,
$"A suitable public method named '{JsonConverterMethodName}' cannot be found in type '{JsonConverterTypeName}'. " +
"The public method must have a single parameter of type 'object', and a return type of 'Value' or 'JToken'");
object instance = null;
if (!methodInfo.IsStatic)
{
try
{
instance = Activator.CreateInstance(type);
}
catch (Exception e)
{
// Acticator.CreateInstance can throw many different exceptions, so catch them all.
throw new InvalidOperationException(
$"Type '{JsonConverterTypeName}' must have a parameterless constructor so it can be instantiated.", e);
}
}
if (methodInfo.ReturnType == typeof(Value))
{
return((Func <object, Value>)methodInfo.CreateDelegate(typeof(Func <object, Value>), instance));
}
else
{
var fn = (Func <object, JToken>)methodInfo.CreateDelegate(typeof(Func <object, JToken>), instance);
return(o => ProtoConverter.Convert(fn(o)));
}
}
private Func <object, Value> BuildProtoConverter()
{
// Create reusable JsonSerializer to reduce allocations
var jsonSettings = new Newtonsoft.Json.JsonSerializerSettings()
{
ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
};
jsonSettings.Converters.Add(new Newtonsoft.Json.Converters.StringEnumConverter());
// The default serialization of these reflection types really isn't useful, so
// just call ToString on them instead.
jsonSettings.Converters.Add(new ToStringJsonConverter(typeof(MemberInfo)));
jsonSettings.Converters.Add(new ToStringJsonConverter(typeof(Assembly)));
jsonSettings.Converters.Add(new ToStringJsonConverter(typeof(Module)));
jsonSettings.Converters.Add(new ToStringJsonConverter(typeof(System.IO.Stream)));
jsonSettings.Error = (sender, args) =>
{
// Serialization of properties that throws exceptions should not break everything
InternalLogger.Debug(args.ErrorContext.Error, "GoogleStackdriver(Name={0}): Error serializing exception property: {1}", Name, args.ErrorContext.Member);
args.ErrorContext.Handled = true;
};
var jsonSerializer = Newtonsoft.Json.JsonSerializer.CreateDefault(jsonSettings);
return(o => {
try
{
switch (Convert.GetTypeCode(o))
{
case TypeCode.Empty:
return Value.ForNull();
case TypeCode.Boolean:
return Value.ForBool(Convert.ToBoolean(o));
case TypeCode.Decimal:
case TypeCode.Double:
case TypeCode.Single:
return Value.ForNumber(Convert.ToDouble(o));
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.UInt16:
case TypeCode.Int32:
case TypeCode.UInt32:
case TypeCode.Int64:
case TypeCode.UInt64:
if (o is System.Enum)
{
break; // Let StringEnumConverter handle formatting
}
return Value.ForNumber(Convert.ToDouble(o));
case TypeCode.String:
case TypeCode.Char:
return Value.ForString(o.ToString());
}
return ProtoConverter.Convert(JToken.FromObject(o, jsonSerializer));
}
catch
{
// Reset the JsonSerializer as it now can be in a bad state
jsonSerializer = Newtonsoft.Json.JsonSerializer.CreateDefault(jsonSettings);
throw;
}
});
}
