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From "Alex Bertram (JIRA)" <j...@apache.org>
Subject [jira] [Created] (VFS-352) ZipFileSystem makes improper assumptions about FileCache
Date Thu, 09 Jun 2011 10:12:58 GMT
ZipFileSystem makes improper assumptions about FileCache
--------------------------------------------------------

                 Key: VFS-352
                 URL: https://issues.apache.org/jira/browse/VFS-352
             Project: Commons VFS
          Issue Type: Bug
    Affects Versions: 1.0
         Environment: Java 1.6
            Reporter: Alex Bertram


Upon init(), ZipFileSystem enumerates all the zip file entries and stores them in the global
FilesCache as well as a "strongRef" array. 

The ZipFileSystem implementation assumes that this will be sufficient to keep all entries
in the cache, and so if the cache misses in AbstractFileSystem, ZipFileSystem assumes that
the file does not exist and returns an imaginary file.

This implementation assumes that the WeakRefFilesCache is being used. If NullFilesCache or
LRUFilesCaches is used, these assumptions will fail and ZipFileSystem will fail to resolve
valid existing files within the system.

ZipFileSystem should maintain its own internal cache instead.



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