/// <summary>
/// Changes the target media object's parent to a different parent.
/// </summary>
/// <param name="target">target object</param>
/// <param name="np">new parent</param>
/// <exception cref="InvalidCastException">
/// Thrown when the target's current parent is not a <see cref="DvMediaContainer"/>.
/// </exception>
internal static void ChangeParent2(IDvMedia target, DvMediaContainer np)
{
Exception error = null;
IUPnPMedia errorDuplicate = null;
IDvMedia[] removeThese = new IDvMedia[1];
removeThese[0] = target;
DvMediaContainer dvp = (DvMediaContainer)target.Parent;
// fire about to remove event
if (dvp.OnChildrenToRemove != null)
{
dvp.OnChildrenToRemove(dvp, removeThese);
}
// acquire locks
dvp.m_LockListing.AcquireWriterLock(-1);
np.m_LockListing.AcquireWriterLock(-1);
try
{
// remove target from current parent
int i = dvp.HashingMethod.Get(dvp.m_Listing, target);
dvp.m_Listing.RemoveAt(i);
target.Parent = null;
if (dvp.m_Listing.Count == 0)
{
dvp.m_Listing = null;
}
// add target to new parent
if (np.m_Listing == null)
{
np.m_Listing = new ArrayList();
}
try
{
np.HashingMethod.Set(np.m_Listing, target, true);
target.Parent = np;
}
catch (KeyCollisionException)
{
errorDuplicate = target;
}
}
catch (Exception e)
{
error = e;
}
// release locks
np.m_LockListing.ReleaseWriterLock();
dvp.m_LockListing.ReleaseWriterLock();
// throw exceptions if appropriate
if (error != null)
{
throw new Exception("Unexpected rrror in DvMediaContainer.ChangeParent2", error);
}
if (errorDuplicate != null)
{
throw new Error_DuplicateIdException(errorDuplicate);
}
// fire children removed event
if (dvp.OnChildrenRemoved != null)
{
dvp.OnChildrenRemoved(dvp, removeThese);
}
// notify upnp network that two containers changed.
dvp.NotifyRootOfChange();
np.NotifyRootOfChange();
}
