public bool TryGetValue(TKey key, [NotNullWhen(true)] out TValue?value)
{
if (_localDictionary.TryGetValue(key, out var localEntry) && localEntry.TryGetValue(out value))
{
return(true);
}
if (_globalDictionary.TryGetValue(key, out var globalEntry) && globalEntry.TryGetValue(out value) && globalEntry.AddReference())
{
if (localEntry is not null)
{
var valueTask = localEntry.RemoveReference();
Infra.Assert(valueTask.IsCompleted);
valueTask.GetAwaiter().GetResult();
}
_localDictionary[key] = globalEntry;
return(true);
}
value = default;
return(false);
}
public ValueTask <IDataModelHandler> CreateHandler(IFactoryContext factoryContext,
string dataModelType,
IErrorProcessor?errorProcessor,
CancellationToken token)
{
Infra.Assert(CanHandle(dataModelType));
return(new ValueTask <IDataModelHandler>(new EcmaScriptDataModelHandler(errorProcessor)));
}
public ValueTask <DataModelValue> Evaluate(IExecutionContext executionContext, CancellationToken token)
{
if (executionContext is null)
{
throw new ArgumentNullException(nameof(executionContext));
}
Infra.Assert(!_dispatcher._valueEvaluators.IsDefault);
var valueEvaluator = _dispatcher._valueEvaluators[_index];
return(Evaluate(valueEvaluator, executionContext, token));
}
public ValueTask Assign(IExecutionContext executionContext, DataModelValue value, CancellationToken token)
{
if (executionContext is null)
{
throw new ArgumentNullException(nameof(executionContext));
}
Infra.Assert(!_dispatcher._locationEvaluators.IsDefault);
var locationEvaluator = _dispatcher._locationEvaluators[_index];
return(locationEvaluator.SetValue(value, executionContext, token));
}
private static XPathNodeIterator CreateIterator(DataModelList list, string key)
{
var navigator = new DataModelXPathNavigator(list);
navigator.MoveToFirstChild();
while (navigator.Name != key)
{
var moved = navigator.MoveToNext();
Infra.Assert(moved);
}
return(new XPathSingleElementIterator(navigator));
}