[PIVOT-880] NPE when calling FileBrowser.setRootDirectory using a UNC path

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.1
• Fix Version/s: 2.0.3, 2.1
• Component/s: wtk-terra
• Environment: Windows XP with network shares
• Assignee: Roger Lee Whitcomb
• Reporter: Steven Swor
• Created: 08/Nov/12 23:24
• Updated: 10/Dec/17 20:11
• Resolved: 09/Nov/12 18:45

Description

I'm using Pivot as the user interface to an enterprise application. I want my users to be able to control applicaiton settings through the UI, such as where to save output files. In this particular case, the users want to use a network share accessed via a UNC path ("\\server\share").

In testing, I discovered a NPE was being logged when I ran the following code:

  FileBrowser browser = ... //assume the browser is shown
  String path = ... //UNC path, such as "\\server\share" (escape slashes removed for legibility)
  java.io.File directory = new java.io.File(path);
  if (directory.exists()) {
      browser.setRootDirectory(directory);
  }

The exception stack trace is:

java.lang.NullPointerException
at org.apache.pivot.wtk.skin.terra.TerraFileBrowserSkin$2.selectedItemChanged(TerraFileBrowserSkin.java:610)
at org.apache.pivot.wtk.ListButton$ListButtonSelectionListenerList.selectedItemChanged(ListButton.java:131)
at org.apache.pivot.wtk.ListButton.setSelectedIndex(ListButton.java:514)
at org.apache.pivot.wtk.ListButton.setSelectedItem(ListButton.java:532)
at org.apache.pivot.wtk.skin.terra.TerraFileBrowserSkin.rootDirectoryChanged(TerraFileBrowserSkin.java:955)
at org.apache.pivot.wtk.FileBrowser$FileBrowserListenerList.rootDirectoryChanged(FileBrowser.java:44)
at org.apache.pivot.wtk.FileBrowser.setRootDirectory(FileBrowser.java:127)

Stepping through the code, it appears as though TerraFileBrowserSkin tries to select the drive by looking for path separators (slash characters), but it gets thrown off by the leading slashes in the UNC path.

Issue Links

• is related to: PIVOT-832 FileBrowserSheet.setRootDirectory(...) fails the first time on drives other than system volume
• is related to: PIVOT-862 FileBrowser[Sheet] display the contents of the root instead of actual folder in some circumstancies