/// <summary>
/// Creates a new <see cref="DataReader" /> with the desired QoS policies and attaches to it the specified <see cref="DataReaderListener" />.
/// </summary>
/// <remarks>
/// <para>The returned <see cref="DataReader" /> will be attached and belong to the <see cref="Subscriber" />.</para>
/// <para>The <see cref="ITopicDescription"/> passed to this operation must have been created from the same <see cref="DomainParticipant" /> that was used to
/// create this <see cref="Subscriber" />. If the <see cref="ITopicDescription"/> was created from a different <see cref="DomainParticipant" />, the operation will fail and
/// return a <see langword="null"/> result.</para>
/// </remarks>
/// <param name="topicDescription">The <see cref="ITopicDescription" /> that the <see cref="DataReader" /> will be associated with.</param>
/// <param name="qos">The <see cref="DataReaderQos" /> policies to be used for creating the new <see cref="DataReader" />.</param>
/// <param name="listener">The <see cref="DataReaderListener" /> to be attached to the newly created <see cref="DataReader" />.</param>
/// <param name="statusMask">The <see cref="StatusMask" /> of which status changes the listener should be notified.</param>
/// <returns>The newly created <see cref="DataReader" /> on success, otherwise <see langword="null"/>.</returns>
public DataReader CreateDataReader(ITopicDescription topicDescription, DataReaderQos qos, DataReaderListener listener, StatusMask statusMask)
{
if (topicDescription is null)
{
throw new ArgumentNullException(nameof(topicDescription));
}
DataReaderQosWrapper qosWrapper = default;
if (qos is null)
{
qos = new DataReaderQos();
var ret = GetDefaultDataReaderQos(qos);
if (ret == ReturnCode.Ok)
{
qosWrapper = qos.ToNative();
}
}
else
{
qosWrapper = qos.ToNative();
}
IntPtr nativeListener = IntPtr.Zero;
if (listener != null)
{
nativeListener = listener.ToNative();
}
IntPtr td = topicDescription.ToNativeTopicDescription();
IntPtr native = UnsafeNativeMethods.CreateDataReader(_native, td, qosWrapper, nativeListener, statusMask);
qos.Release();
if (native.Equals(IntPtr.Zero))
{
return(null);
}
var dr = new DataReader(native)
{
Listener = listener,
};
EntityManager.Instance.Add((dr as Entity).ToNative(), dr);
ContainedEntities.Add(dr);
return(dr);
}
public override void HandleComponentState(dynamic state)
{
var theState = state as InventoryComponentState;
var stateChanged = false;
if (MaxSlots != theState.MaxSlots)
{
MaxSlots = theState.MaxSlots;
stateChanged = true;
}
var newEntities = new List <int>(theState.ContainedEntities);
var toRemove = new List <IEntity>();
foreach (var e in ContainedEntities)
{
if (newEntities.Contains(e.Uid))
{
newEntities.Remove(e.Uid);
}
else
{
toRemove.Add(e);
}
}
stateChanged = stateChanged || toRemove.Any() || newEntities.Any();
foreach (var e in toRemove)
{
ContainedEntities.Remove(e);
}
foreach (var uid in newEntities)
{
ContainedEntities.Add(Owner.EntityManager.GetEntity(uid));
}
if (stateChanged && Changed != null)
{
Changed(this, MaxSlots, ContainedEntities);
}
}
private void UnpackListing(IncomingEntityComponentMessage msg)
{
MaxSlots = (int)msg.MessageParameters[1];
ContainedEntities.Clear();
for (int i = 0; i < (int)msg.MessageParameters[2]; i++)
{
int msgPos = 3 + i;
Entity entity = Owner.EntityManager.GetEntity((int)msg.MessageParameters[msgPos]);
if (entity != null)
{
ContainedEntities.Add(entity);
}
}
if (Changed != null)
{
Changed(this, MaxSlots, ContainedEntities);
}
}