protected static object LoadInstance(XElement definition, Type expectedType, object instance)
{
if (definition != null)
{
XAttribute typeName = definition.Attribute(TypeAttributeName);
if (typeName != null)
{
// Type attribute is specified, instantiate a new object of that type
// If configuration instance is already created with the correct type, don't create it just load its properties
if (instance == null || instance.GetType() != GetType(typeName.Value))
{
// Type specified, create a new instance
instance = CreateInstance(expectedType, typeName.Value);
}
}
else if (!definition.Elements().Any() && !definition.Attributes().Any())
{
// Type attribute is not specified and no child elements or attributes exist, so this must be a scalar value
LoadInstanceFromValue(definition, expectedType, ref instance);
}
else if (instance == null && !expectedType.IsAbstract())
{
instance = Activator.CreateInstance(expectedType);
}
else if (instance == null)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
"'{0}' element does not have a Type attribute, does not specify a value and is not a valid collection type",
definition.Name.LocalName));
}
if (instance != null)
{
LoadProperties(definition, instance);
Type elementType;
if (GetCollectionElementType(instance.GetType(), out elementType))
{
MethodInfo genericLoadInstances = LoadInstancesDefinition.MakeGenericMethod(elementType);
genericLoadInstances.Invoke(null, new object[] { definition, instance });
}
}
}
return(instance);
}
protected static object LoadInstance(XElement definition, Type expectedType, object instance, object[] constructorArgs, TelemetryModules modules)
{
if (definition != null)
{
XAttribute typeName = definition.Attribute(TypeAttributeName);
if (typeName != null)
{
// Type attribute is specified, instantiate a new object of that type
// If configuration instance is already created with the correct type, don't create it just load its properties
if (instance == null || instance.GetType() != GetType(typeName.Value))
{
// Type specified, create a new instance
instance = CreateInstance(expectedType, typeName.Value, constructorArgs);
}
}
else if (!definition.Elements().Any() && !definition.Attributes().Any() && constructorArgs == null)
{
// Neither type attribute nor constructor args are specified, and no child elements or attributes exist, so this must be a scalar value.
LoadInstanceFromValue(definition, expectedType, ref instance);
}
else if (instance == null && !expectedType.IsAbstract())
{
instance = constructorArgs != null?Activator.CreateInstance(expectedType, constructorArgs) : Activator.CreateInstance(expectedType);
}
else if (instance == null)
{
CoreEventSource.Log.IncorrectInstanceAtributesConfigurationError(definition.Name.LocalName);
}
if (instance != null)
{
LoadProperties(definition, instance, modules);
Type elementType;
if (GetCollectionElementType(instance.GetType(), out elementType))
{
MethodInfo genericLoadInstances = LoadInstancesDefinition.MakeGenericMethod(elementType);
genericLoadInstances.Invoke(null, new[] { definition, instance, modules });
}
}
}
return(instance);
}
