[VFS-558] java.lang.UnsupportedOperationException in FtpFileObject

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0
• Fix Version/s: 2.1
• Assignee: Bernd Eckenfels
• Reporter: L
• Created: 18/Jan/15 16:12
• Updated: 19/May/16 18:26
• Resolved: 18/Jan/15 23:21

Description

I am getting the following exception in my code:

java.lang.UnsupportedOperationException
at java.util.Collections$UnmodifiableMap.remove(Collections.java:1345)
at org.apache.commons.vfs2.provider.ftp.FtpFileObject.onChildrenChanged(FtpFileObject.java:271)
at org.apache.commons.vfs2.provider.AbstractFileObject.childrenChanged(AbstractFileObject.java:240)
at org.apache.commons.vfs2.provider.AbstractFileObject.notifyParent(AbstractFileObject.java:1931)
at org.apache.commons.vfs2.provider.AbstractFileObject.handleCreate(AbstractFileObject.java:1577)
at org.apache.commons.vfs2.provider.AbstractFileObject.moveTo(AbstractFileObject.java:1866)
at org.apache.commons.vfs2.impl.DecoratedFileObject.moveTo(DecoratedFileObject.java:241)
at org.apache.commons.vfs2.cache.OnCallRefreshFileObject.moveTo(OnCallRefreshFileObject.java:184)
...

I guess it is caused by the fact that children field is set to EMPTY_FTP_FILE_MAP at the moment onChildrenChanged() is invoked.

I also do not like line 1866 in AbstractFileObject.java. To me it looks like it might be the real cause of the problem:

FileObjectUtils.getAbstractFileObject(destFile).handleCreate(getType());

Must it not be destFile.getType()?

But even if I am right about AbstractFileObject.java:1866, FtpFileObject.onChildrenChanged() must be corrected as well.