public static void Inject(IBuildContext context, object obj)
{
FieldInfo[] fields = obj.GetType().GetFields(BindingFlags.Instance | BindingFlags.NonPublic);
foreach (FieldInfo field in fields)
{
object[] attrs = field.GetCustomAttributes(typeof(InjectContextAttribute), true);
if (attrs.Length == 0)
continue;
InjectContextAttribute attr = attrs[0] as InjectContextAttribute;
if (attr == null || attr.Usage == ContextUsage.Out)
continue;
object injectionObject;
if (field.FieldType == typeof(IBuildContext))
injectionObject = context;
else if (!attr.Optional)
injectionObject = context.GetContextObject(field.FieldType);
else
{
IContextObject contextObject;
context.TryGetContextObject(field.FieldType, out contextObject);
injectionObject = contextObject;
}
field.SetValue(obj, injectionObject);
}
}
public static void Extract(IBuildContext context, object obj)
{
FieldInfo[] fields = obj.GetType().GetFields(BindingFlags.Instance | BindingFlags.NonPublic);
foreach (FieldInfo field in fields)
{
object[] attrs = field.GetCustomAttributes(typeof(InjectContextAttribute), true);
if (attrs.Length == 0)
{
continue;
}
InjectContextAttribute attr = attrs[0] as InjectContextAttribute;
if (attr == null || attr.Usage == ContextUsage.In)
{
continue;
}
if (field.FieldType == typeof(IBuildContext))
{
throw new InvalidOperationException("IBuildContext can only be used with the ContextUsage.In option.");
}
IContextObject contextObject = field.GetValue(obj) as IContextObject;
if (!attr.Optional)
{
context.SetContextObject(field.FieldType, contextObject);
}
else if (contextObject != null)
{
context.SetContextObject(field.FieldType, contextObject);
}
}
}