/// <summary>
/// Initializes a new instance of the <see cref="CalculatedFieldContext"/> class.
/// </summary>
public CalculatedFieldContext()
{
_originalContext = _currentContext;
_thread = Thread.CurrentThread;
_currentContext = this;
}
public void Dispose()
{
if (_disposed)
return;
_disposed = true;
if (_thread != Thread.CurrentThread)
throw new InvalidOperationException("Scope should be disposed in the original thread.");
if (_currentContext != this)
throw new InvalidOperationException("Scope is disposed in incorrect order.");
_currentContext = _originalContext;
if (_originalContext != null && _isBusy)
_originalContext.MarkBusy();
}
public override bool CanExecute(IDynamicObject item, IDynamicObject oldItem)
{
if (item == null)
throw new ArgumentNullException("item");
//ELMTSUP-2704 Fields Security Rules should be ignored when Action Rule is evaluated
using (new BypassPropertyCheckContext())
using (var context = new CalculatedFieldContext())
{
bool ruleResult;
try
{
ruleResult = Expression != null && Expression(item, oldItem);
}
catch (Exception ex)
{
#if !SILVERLIGHT
Logger.Log(LogSeverity.Error, "Rule Expression", ex);
#endif
ruleResult = false;
}
var editableItem = item as IEditableRoot;
if (editableItem != null)
{
if (!context.IsBusy)
{
editableItem.SetRuleResult(Guid, ruleResult);
}
return editableItem.GetRuleResult(Guid) ?? false;
}
return !context.IsBusy && ruleResult;
}
}
