/// <summary>
/// (Downwards) Creates a chain of descriptors for all of the snapins that depend on the specified snapin, this is recursive and will graph the entire tree
/// </summary>
/// <param name="descriptor"></param>
/// <param name="descriptors"></param>
/// <returns></returns>
public static SnapInDescriptorLink CreateDependencyChainForSnapInsThatDependOnThisSnapIn(SnapInDescriptor descriptor, SnapInDescriptor[] descriptors)
{
// create a new link for the descriptor specified
SnapInDescriptorLink link = new SnapInDescriptorLink(descriptor);
// find any other descriptors that depend on the specified descriptor passed in
foreach(SnapInDescriptor otherDescriptor in descriptors)
{
foreach(Type dependency in otherDescriptor.Dependencies)
{
if (Type.Equals(descriptor.Type, dependency))
{
// find all of that dependency's chain, and do it recursively (Downwards)
SnapInDescriptorLink nextLink = SnapInHostingEngine.CreateDependencyChainForSnapInsThatDependOnThisSnapIn(otherDescriptor, descriptors);
link.Links.Add(nextLink);
}
}
}
return link;
}
/// <summary>
/// Follows the link to the end of the chain, recursively, and stops each link after it's dependencies have been stopped
/// </summary>
/// <param name="link"></param>
/// <param name="progressViewer"></param>
internal static bool StopLink(SnapInDescriptorLink link, IProgressViewer progressViewer)
{
if (link != null)
{
// stop the links that depend on this link first
bool linksStopped = true;
foreach(SnapInDescriptorLink l in link.Links)
{
// start this link's dependency chain
linksStopped = SnapInHostingEngine.StopLink(l, progressViewer);
if (!linksStopped)
break;
}
// if all of the links that depend on this have stopped
if (linksStopped)
// then finally stop this link, and back out
return SnapInHostingEngine.Stop(link.Descriptor, false, progressViewer);
}
return false;
}
/// <summary>
/// (Upwards) Creates a chain of descriptors for all of the snapins that this snapin depends upon, this is recursive and will graph the entire tree
/// </summary>
/// <param name="descriptor"></param>
/// <param name="descriptors"></param>
/// <returns></returns>
public static SnapInDescriptorLink CreateDependencyChainForSnapInsThatThisSnapInDependsOn(SnapInDescriptor descriptor, SnapInDescriptor[] descriptors)
{
// create a new link for the descriptor specified
SnapInDescriptorLink link = new SnapInDescriptorLink(descriptor);
// find any descriptors that this descriptor depends on
foreach(Type dependency in descriptor.Dependencies)
{
foreach(SnapInDescriptor otherDescriptor in descriptors)
{
if (Type.Equals(otherDescriptor.Type, dependency))
{
// find all of the dependency's chain, and do it resursiviely (Upwards)
SnapInDescriptorLink nextLink = SnapInHostingEngine.CreateDependencyChainForSnapInsThatThisSnapInDependsOn(otherDescriptor, descriptors);
link.Links.Add(nextLink);
}
}
}
return link;
}