/// <summary>
/// finds the value manager that can handle the object
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public INodeValueManager FindHandlingValueManager(object obj, IGraph graph, params string[] ignoreList)
{
INodeValueManager rv = null;
foreach (var each in this.ValueManagers)
{
//ALWAYS ignore UndeclaredValueManager
if (each is UndeclaredValueManager)
{
continue;
}
//don't look for handling managers from the ignore list
if (ignoreList != null && ignoreList.Contains(each.Id))
{
continue;
}
if (each.CanHandle(obj, graph))
{
rv = each;
break;
}
}
return(rv);
}
public static NullCheckDecoration DecorateWithNullCheck(this INodeValueManager mgr)
{
Condition.Requires(mgr).IsNotNull();
if (mgr is NullCheckDecoration)
{
return((NullCheckDecoration)mgr);
}
return(new NullCheckDecoration(mgr));
}
public void Parse(string text)
{
Condition.Requires(text).IsNotNullOrEmpty();
var list = LengthEncoder.LengthDecodeList(text);
List <INodeValueManager> plugins = null;
//strategy to load the managers (via assembly interrogation/plugin loading)
Action initPlugins = () =>
{
TypeContainer <INodeValueManager> types = TypeContainer <INodeValueManager> .NewDefault();
plugins = new List <INodeValueManager>();
foreach (var each in types.ContainedTypes)
{
try
{
INodeValueManager mgr = Activator.CreateInstance(each) as INodeValueManager;
if (list.Contains(mgr.Id))
{
plugins.Add(mgr);
}
}
catch { }
}
};
//hydrate the managers list in the specified order
var newList = new List <INodeValueManager>();
foreach (var each in list)
{
//get the mgr by id from the current managers (we want to use managers that we've explicitly added, first)
// if it can't be found, get it from the plugins
var mgr = this.ValueManagers.Find(x => x.Id == each);
if (mgr == null)
{
//we can't find the manager so load the plugins
if (plugins == null)
{
initPlugins();
}
mgr = plugins.Find(x => x.Id == each);
}
Condition.Requires(mgr).IsNotNull();
newList.Add(mgr);
}
this.ValueManagers = newList;
}
public INodeValueManager GetValueManagerById(string id)
{
INodeValueManager rv = null;
foreach (var each in this.ValueManagers)
{
if (each.Id.Equals(id))
{
rv = each;
break;
}
}
return(rv);
}
public override IDecorationOf<INodeValueManager> ApplyThisDecorationTo(INodeValueManager thing)
{
return new NullCheckDecoration(thing);
}
public NullCheckDecoration(INodeValueManager decorated)
: base(decorated)
{
}
public override IDecorationOf <INodeValueManager> ApplyThisDecorationTo(INodeValueManager thing)
{
return(new NullCheckDecoration(thing));
}
public NullCheckDecoration(INodeValueManager decorated)
: base(decorated)
{
}