/// <summary>
/// Reads the JSON representation of the object.
/// </summary>
/// <param name="reader">The <see cref="T:Newtonsoft.Json.JsonReader" /> to read from.</param>
/// <param name="objectType">Type of the object.</param>
/// <param name="existingValue">The existing value of object being read.</param>
/// <param name="serializer">The calling serializer.</param>
/// <returns>
/// The object value.
/// </returns>
/// <exception cref="UnitsNetException">Unable to parse value and unit from JSON.</exception>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue,
JsonSerializer serializer)
{
var vu = serializer.Deserialize<ValueUnit>(reader);
// A null System.Nullable value was deserialized so just return null.
if (vu == null)
return null;
// "MassUnit.Kilogram" => "MassUnit" and "Kilogram"
string unitEnumTypeName = vu.Unit.Split('.')[0];
string unitEnumValue = vu.Unit.Split('.')[1];
// "MassUnit" => "Mass"
string unitTypeName = unitEnumTypeName.Substring(0, unitEnumTypeName.Length - "Unit".Length);
// "UnitsNet.Units.MassUnit,UnitsNet"
string unitEnumTypeAssemblyQualifiedName = "UnitsNet.Units." + unitEnumTypeName + ",UnitsNet";
// "UnitsNet.Mass,UnitsNet"
string unitTypeAssemblyQualifiedName = "UnitsNet." + unitTypeName + ",UnitsNet";
// -- see http://stackoverflow.com/a/6465096/1256096 for details
Type reflectedUnitEnumType = Type.GetType(unitEnumTypeAssemblyQualifiedName);
if (reflectedUnitEnumType == null)
{
var ex = new UnitsNetException("Unable to find enum type.");
ex.Data["type"] = unitEnumTypeAssemblyQualifiedName;
throw ex;
}
Type reflectedUnitType = Type.GetType(unitTypeAssemblyQualifiedName);
if (reflectedUnitType == null)
{
var ex = new UnitsNetException("Unable to find unit type.");
ex.Data["type"] = unitTypeAssemblyQualifiedName;
throw ex;
}
object unit = Enum.Parse(reflectedUnitEnumType, unitEnumValue);
// Mass.From() method, assume no overloads exist
MethodInfo fromMethod = (from m in reflectedUnitType.GetMethods()
where m.Name.Equals("From", StringComparison.InvariantCulture) &&
!m.ReturnType.IsGenericType // we want the non nullable type
select m).Single();
// Ex: Mass.From(55, MassUnit.Gram)
// TODO: there is a possible loss of precision if base value requires higher precision than double can represent.
// Example: Serializing Information.FromExabytes(100) then deserializing to Information
// will likely return a very different result. Not sure how we can handle this?
return fromMethod.Invoke(null, BindingFlags.Static, null, new[] {vu.Value, unit},
CultureInfo.InvariantCulture);
}
/// <summary>
/// Writes the JSON representation of the object.
/// </summary>
/// <param name="writer">The <see cref="T:Newtonsoft.Json.JsonWriter" /> to write to.</param>
/// <param name="value">The value to write.</param>
/// <param name="serializer">The calling serializer.</param>
/// <exception cref="UnitsNetException">Can't serialize 'null' value.</exception>
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
Type unitType = value.GetType();
FieldInfo[] fields =
unitType.GetFields(BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly);
if (fields.Length == 0)
{
var ex = new UnitsNetException("No private fields found in type.");
ex.Data["type"] = unitType;
throw ex;
}
if (fields.Length > 1)
{
var ex = new UnitsNetException("Expected exactly 1 private field, but found multiple.");
ex.Data["type"] = unitType;
throw ex;
}
// Unit base type can be double, long or decimal,
// so make sure we serialize the real type to avoid
// loss of precision
FieldInfo baseValueField = fields.First();
object baseValue = baseValueField.GetValue(value);
// Mass => "MassUnit.Kilogram"
PropertyInfo baseUnitPropInfo = unitType.GetProperty("BaseUnit");
// Read static BaseUnit property value
Enum baseUnitEnumValue = (Enum)baseUnitPropInfo.GetValue(null, null);
Type baseUnitType = baseUnitEnumValue.GetType();
string baseUnit = $"{baseUnitType.Name}.{baseUnitEnumValue}";
serializer.Serialize(writer, new ValueUnit
{
// This might throw OverflowException for very large values?
// TODO Should we serialize long, decimal and long differently?
Value = Convert.ToDouble(baseValue),
Unit = baseUnit
});
}
/// <summary>
/// Reads the JSON representation of the object.
/// </summary>
/// <param name="reader">The <see cref="T:Newtonsoft.Json.JsonReader" /> to read from.</param>
/// <param name="objectType">Type of the object.</param>
/// <param name="existingValue">The existing value of object being read.</param>
/// <param name="serializer">The calling serializer.</param>
/// <returns>
/// The object value.
/// </returns>
/// <exception cref="UnitsNetException">Unable to parse value and unit from JSON.</exception>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue,
JsonSerializer serializer)
{
if (reader.ValueType != null)
{
return(reader.Value);
}
object obj = TryDeserializeIComparable(reader, serializer);
// A null System.Nullable value or a comparable type was deserialized so return this
if (!(obj is ValueUnit vu))
{
return(obj);
}
// "MassUnit.Kilogram" => "MassUnit" and "Kilogram"
string unitEnumTypeName = vu.Unit.Split('.')[0];
string unitEnumValue = vu.Unit.Split('.')[1];
// "UnitsNet.Units.MassUnit,UnitsNet"
string unitEnumTypeAssemblyQualifiedName = "UnitsNet.Units." + unitEnumTypeName + ",UnitsNet";
// -- see http://stackoverflow.com/a/6465096/1256096 for details
Type unitEnumType = Type.GetType(unitEnumTypeAssemblyQualifiedName);
if (unitEnumType == null)
{
var ex = new UnitsNetException("Unable to find enum type.");
ex.Data["type"] = unitEnumTypeAssemblyQualifiedName;
throw ex;
}
double value = vu.Value;
Enum unitValue = (Enum)Enum.Parse(unitEnumType, unitEnumValue); // Ex: MassUnit.Kilogram
return(Quantity.From(value, unitValue));
}
/// <summary>
/// Convert a <see cref="ValueUnit"/> to an <see cref="IQuantity"/>
/// </summary>
/// <param name="valueUnit">The value unit to convert</param>
/// <exception cref="UnitsNetException">Thrown when an invalid Unit has been provided</exception>
/// <returns>An IQuantity</returns>
protected IQuantity ConvertValueUnit(ValueUnit valueUnit)
{
if (valueUnit == null || string.IsNullOrWhiteSpace(valueUnit.Unit))
{
return(null);
}
var unitParts = valueUnit.Unit.Split('.');
if (unitParts.Length != 2)
{
var ex = new UnitsNetException($"\"{valueUnit.Unit}\" is not a valid unit.");
ex.Data["type"] = valueUnit.Unit;
throw ex;
}
// "MassUnit.Kilogram" => "MassUnit" and "Kilogram"
var unitEnumTypeName = unitParts[0];
var unitEnumValue = unitParts[1];
// "UnitsNet.Units.MassUnit,UnitsNet"
var unitEnumTypeAssemblyQualifiedName = "UnitsNet.Units." + unitEnumTypeName + ",UnitsNet";
// -- see http://stackoverflow.com/a/6465096/1256096 for details
var unitEnumType = Type.GetType(unitEnumTypeAssemblyQualifiedName);
if (unitEnumType == null)
{
var ex = new UnitsNetException("Unable to find enum type.");
ex.Data["type"] = unitEnumTypeAssemblyQualifiedName;
throw ex;
}
var value = valueUnit.Value;
var unitValue = (Enum)Enum.Parse(unitEnumType, unitEnumValue); // Ex: MassUnit.Kilogram
return(Quantity.From(value, unitValue));
}
private static IQuantity ParseValueUnit(ValueUnit vu)
{
// "MassUnit.Kilogram" => "MassUnit" and "Kilogram"
string unitEnumTypeName = vu.Unit.Split('.')[0];
string unitEnumValue = vu.Unit.Split('.')[1];
// "UnitsNet.Units.MassUnit,UnitsNet"
string unitEnumTypeAssemblyQualifiedName = "UnitsNet.Units." + unitEnumTypeName + ",UnitsNet";
// -- see http://stackoverflow.com/a/6465096/1256096 for details
Type unitEnumType = Type.GetType(unitEnumTypeAssemblyQualifiedName);
if (unitEnumType == null)
{
var ex = new UnitsNetException("Unable to find enum type.");
ex.Data["type"] = unitEnumTypeAssemblyQualifiedName;
throw ex;
}
double value = vu.Value;
Enum unitValue = (Enum)Enum.Parse(unitEnumType, unitEnumValue); // Ex: MassUnit.Kilogram
return(Quantity.From(value, unitValue));
}
/// <summary>
/// Writes the JSON representation of the object.
/// </summary>
/// <param name="writer">The <see cref="T:Newtonsoft.Json.JsonWriter" /> to write to.</param>
/// <param name="value">The value to write.</param>
/// <param name="serializer">The calling serializer.</param>
/// <exception cref="UnitsNetException">Can't serialize 'null' value.</exception>
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
Type unitType = value.GetType();
FieldInfo[] fields =
unitType.GetFields(BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly);
if (fields.Length == 0)
{
var ex = new UnitsNetException("No private fields found in type.");
ex.Data["type"] = unitType;
throw ex;
}
if (fields.Length > 1)
{
var ex = new UnitsNetException("Expected exactly 1 private field, but found multiple.");
ex.Data["type"] = unitType;
throw ex;
}
// Unit base type can be double, long or decimal,
// so make sure we serialize the real type to avoid
// loss of precision
FieldInfo baseValueField = fields.First();
object baseValue = baseValueField.GetValue(value);
// Mass => "MassUnit.Kilogram"
PropertyInfo baseUnitPropInfo = unitType.GetProperty("BaseUnit");
// Read static BaseUnit property value
Enum baseUnitEnumValue = (Enum) baseUnitPropInfo.GetValue(null, null);
Type baseUnitType = baseUnitEnumValue.GetType();
string baseUnit = string.Format("{0}.{1}", baseUnitType.Name, baseUnitEnumValue);
serializer.Serialize(writer, new ValueUnit
{
// This might throw OverflowException for very large values?
// TODO Should we serialize long, decimal and long differently?
Value = Convert.ToDouble(baseValue),
Unit = baseUnit
});
}
/// <summary>
/// Reads the JSON representation of the object.
/// </summary>
/// <param name="reader">The <see cref="T:Newtonsoft.Json.JsonReader" /> to read from.</param>
/// <param name="objectType">Type of the object.</param>
/// <param name="existingValue">The existing value of object being read.</param>
/// <param name="serializer">The calling serializer.</param>
/// <returns>
/// The object value.
/// </returns>
/// <exception cref="UnitsNetException">Unable to parse value and unit from JSON.</exception>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue,
JsonSerializer serializer)
{
if (reader.ValueType != null)
{
return(reader.Value);
}
object obj = TryDeserializeIComparable(reader, serializer);
var vu = obj as ValueUnit;
// A null System.Nullable value or a comparable type was deserialized so return this
if (vu == null)
{
return(obj);
}
// "MassUnit.Kilogram" => "MassUnit" and "Kilogram"
string unitEnumTypeName = vu.Unit.Split('.')[0];
string unitEnumValue = vu.Unit.Split('.')[1];
// "MassUnit" => "Mass"
string unitTypeName = unitEnumTypeName.Substring(0, unitEnumTypeName.Length - "Unit".Length);
// "UnitsNet.Units.MassUnit,UnitsNet"
string unitEnumTypeAssemblyQualifiedName = "UnitsNet.Units." + unitEnumTypeName + ",UnitsNet";
// "UnitsNet.Mass,UnitsNet"
string unitTypeAssemblyQualifiedName = "UnitsNet." + unitTypeName + ",UnitsNet";
// -- see http://stackoverflow.com/a/6465096/1256096 for details
Type reflectedUnitEnumType = Type.GetType(unitEnumTypeAssemblyQualifiedName);
if (reflectedUnitEnumType == null)
{
var ex = new UnitsNetException("Unable to find enum type.");
ex.Data["type"] = unitEnumTypeAssemblyQualifiedName;
throw ex;
}
Type reflectedUnitType = Type.GetType(unitTypeAssemblyQualifiedName);
if (reflectedUnitType == null)
{
var ex = new UnitsNetException("Unable to find unit type.");
ex.Data["type"] = unitTypeAssemblyQualifiedName;
throw ex;
}
object unit = Enum.Parse(reflectedUnitEnumType, unitEnumValue);
// Mass.From() method, assume no overloads exist
MethodInfo fromMethod = (from m in reflectedUnitType.GetMethods()
where m.Name.Equals("From", StringComparison.InvariantCulture) &&
!m.ReturnType.IsGenericType // we want the non nullable type
select m).Single();
// Ex: Mass.From(55, MassUnit.Gram)
// TODO: there is a possible loss of precision if base value requires higher precision than double can represent.
// Example: Serializing Information.FromExabytes(100) then deserializing to Information
// will likely return a very different result. Not sure how we can handle this?
return(fromMethod.Invoke(null, BindingFlags.Static, null, new[] { vu.Value, unit },
CultureInfo.InvariantCulture));
}
