internal void AddBinding(PSVariable variable, EventInfo eventInfo, string queueName)
{
Guid bindindID = Guid.NewGuid();
lock (s_bindings)
{
s_bindings.Add(bindindID, new WeakReference(variable));
WriteDebug("Added PSVariable tracking entry.");
}
try
{
Delegate handler = PSEventHelper.BindEventSink(variable, eventInfo, bindindID, queueName);
WriteDebug("Event sink bound.");
PSEventBindingAttribute attr = new PSEventBindingAttribute(eventInfo.Name, handler, bindindID);
variable.Attributes.Add(attr);
WriteDebug("Added binding attribute to PSVariable.");
}
catch (Exception ex)
{
m_command.WriteWarning(String.Format("Error binding to {0} on {1}: {2}", eventInfo.Name, variable.Name, ex.Message));
s_bindings.Remove(bindindID);
WriteDebug("Removed PSVariable tracking entry.");
throw;
}
}
internal void RemoveBinding(PSVariable variable, string eventName)
{
// need for instead of foreach (need to modify collection)
for (int index = 0; index < variable.Attributes.Count; index++)
{
PSEventBindingAttribute bindingAttr = variable.Attributes[index] as PSEventBindingAttribute;
if (bindingAttr != null)
{
if (bindingAttr.EventName.Equals(eventName, StringComparison.OrdinalIgnoreCase))
{
PSEventHelper.UnbindEventSink(variable, eventName, bindingAttr.Handler);
WriteDebug("Unbound event sink from variable.");
variable.Attributes.Remove(bindingAttr);
WriteDebug("Removed binding attribute from PSVariable.");
// remove PSVariable tracker
lock (s_bindings)
{
s_bindings.Remove(bindingAttr.BindingID);
WriteDebug("Removed PSVariable tracking entry.");
}
}
}
}
}
internal List <PSEventBindingInfo> GetBindings(PSVariable variable, bool includeUnboundEvents)
{
object targetObject = variable.Value;
if (targetObject == null)
{
return(null);
}
if (targetObject is PSObject)
{
targetObject = ((PSObject)targetObject).BaseObject;
}
Type targetType = targetObject.GetType();
List <PSEventBindingInfo> bindingInfos = new List <PSEventBindingInfo>();
// find currently bound events
foreach (Attribute attr in variable.Attributes)
{
PSEventBindingAttribute bindingAttr = attr as PSEventBindingAttribute;
if (bindingAttr != null)
{
WriteDebug("Found " + bindingAttr.EventName + " binding on " + variable.Name);
PSEventBindingInfo bindingInfo = new PSEventBindingInfo(variable.Name, bindingAttr.EventName, targetType.Name, true);
bindingInfos.Add(bindingInfo);
}
}
if (includeUnboundEvents)
{
AddUnboundEvents(variable, targetType, bindingInfos);
}
// no point sorting an empty list, or one with a single value ;-)
if (bindingInfos.Count > 1)
{
// sort by event name
bindingInfos.Sort(new Comparison <PSEventBindingInfo>(
delegate(PSEventBindingInfo info1, PSEventBindingInfo info2)
{
return(info1.EventName.CompareTo(info2.EventName));
}));
}
return(bindingInfos);
}