/**
* Get the container which security callback affects this item. This searches up the path of
* parents to see wether it can find any container with a callback. If no callback can be found,
* null is returned.
*
* @param vfsItem
* @return
*/
public static VFSContainer findInheritingSecurityCallbackContainer(VFSItem vfsItem) {
if (vfsItem == null) return null;
// first resolve delegates of any NamedContainers to get the actual container (might be a
// MergeSource)
if (vfsItem instanceof NamedContainerImpl)
return findInheritingSecurityCallbackContainer(((NamedContainerImpl) vfsItem).getDelegate());
// special treatment for MergeSource
if (vfsItem instanceof MergeSource) {
MergeSource mergeSource = (MergeSource) vfsItem;
VFSContainer rootWriteContainer = mergeSource.getRootWriteContainer();
if (rootWriteContainer != null && rootWriteContainer.getLocalSecurityCallback() != null) {
// if the root write container has a security callback set, it will always override
// any local securitycallback set on the mergesource
return rootWriteContainer;
} else if (mergeSource.getLocalSecurityCallback() != null) {
return mergeSource;
} else if (mergeSource.getParentContainer() != null) {
return findInheritingSecurityCallbackContainer(mergeSource.getParentContainer());
}
} else {
if ((vfsItem instanceof VFSContainer) && (vfsItem.getLocalSecurityCallback() != null))
return (VFSContainer) vfsItem;
if (vfsItem.getParentContainer() != null)
return findInheritingSecurityCallbackContainer(vfsItem.getParentContainer());
}
return null;
}
