/// <summary>
/// Constructs a new instance of the object represented by the expression.
/// </summary>
/// <param name="expression">json object expression</param>
/// <param name="deserializer">deserializer for deserializing constructor arguments if any</param>
/// <returns>constructed, but unpopulated object</returns>
protected virtual object ConstructObject(ObjectExpression expression, IDeserializerHandler deserializer)
{
TypeData handler = Context.GetTypeHandler(expression.ResultType);
// set the default type if none set
if (expression.ConstructorArguments.Count > 0)
{
// old way expects parameters in the constructor list
ResolveConstructorTypes(Context, expression);
}
else
{
foreach (IPropertyData parameter in handler.ConstructorParameters)
{
int propLocation = expression.IndexOf(parameter.Name);
if (propLocation >= 0)
{
Expression arg = expression.Properties[propLocation].ValueExpression;
arg.ResultType = parameter.PropertyType;
expression.ConstructorArguments.Add(arg);
expression.Properties.RemoveAt(propLocation);
}
else
{
expression.ConstructorArguments.Add(new NullExpression());
}
}
}
object[] args = new object[expression.ConstructorArguments.Count];
for (int i = 0; i < args.Length; i++)
{
Expression carg = expression.ConstructorArguments[i];
args[i] = deserializer.Evaluate(carg);
}
object result = handler.CreateInstance(args);
expression.OnObjectConstructed(result);
return result;
}
