Class DirectoryScan

java.lang.Object

net.bluemind.node.shared.DirectoryScan

public class DirectoryScan
extends Object

Method Summary

Modifier and Type	Method	Description
static DirectoryPage	page(Path directory, Predicate<String> nameFilter, int pageSize, String after)	Read one page of regular files from a directory, ordered by file name.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

page

public static DirectoryPage page(Path directory,
 Predicate<String> nameFilter,
 int pageSize,
 String after)
                          throws IOException

Read one page of regular files from a directory, ordered by file name. Only the pageSize smallest names above after are held in memory, so a directory with millions of entries is neither materialized nor sorted as a whole.

Parameters:

directory - scanned directory, not recursed into

nameFilter - keeps the file names to return

pageSize - maximum number of entries in the page

after - name of the last entry of the previous page, null to start at the beginning of the directory

Returns:

an empty page when the directory does not exist

Throws:

IOException