Getting a parent folder WITHOUT IfsFileSystem

Question

Hi,
We discovered that using the IfsFileSystem class drastically increases access times to iFS public objects. As a result we are considering phasing out use of this class in favour of other API calls, which appear to be faster.
Unfortunately we cannot find an easy way to get the parent folder of a document or folder. Please help, we definitely cannot use IfsFileSystem and need another way around.
It would be interesting to hear if anybody else has discovered problems with the IfsFileSystem class. Even just creating one instance seems to increase access times?!?
Thanks in advance,
Max

Answer 1

One way to do this is to use either of the following two methods on PublicObject:
public java.lang.String[] getAllFolderPaths()
public java.lang.String getAnyFolderPath()
The first will return every path to the PublicObject in question. (Remember that a PublicObject can have multiple parent folders, or none.) The second will return one of them.
Given a folder path, you can find a PublicObject. Here's some pseudocode (if you decide to use this, make sure to check for IfsExceptions and null values):
// get your folder and its path
LibrarySession sess = openLibrarySession();
Folder myFolder = getMyFolder();
String path = myFolder.getAnyFolderPath();
// get its parent folder
FolderPathResolver fpr =
new FolderPathResolver(sess);
PublicObject parent = fpr.findPublicObject(
path +
sess.getFolderPathDelimiter() +
FolderPathResolver.UP_DIRECTORY_TOKEN );
Another way to do this would be to search for all FolderPathRelationship objects whose RIGHTOBJECT attribute is your folder, and then get the LEFTOBJECT attribute from one of the FolderPathRelationship objects you find. The LEFTOBJECT would be the folder's parent.
Read the javadoc for more details.