[jboss-jira] [JBoss JIRA] Updated: (JBCL-43) PackageInformation retrieved from wrong jar

[Stan Silvert (JIRA)]

     [ https://jira.jboss.org/jira/browse/JBCL-43?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stan Silvert updated JBCL-43:
-----------------------------

    Attachment: jboss-seam-numberguess.ear


Seam numberguess ear where the jboss-seam-numberguess.jar has a manifest with values that say "from numberguess jar"

> PackageInformation retrieved from wrong jar
> -------------------------------------------
>
>                 Key: JBCL-43
>                 URL: https://jira.jboss.org/jira/browse/JBCL-43
>             Project: JBoss ClassLoader
>          Issue Type: Bug
>          Components: ClassLoaderPolicy, VFS
>    Affects Versions: JBossCL.2.0.0.GA
>            Reporter: Stan Silvert
>         Attachments: jboss-seam-numberguess.ear
>
>
> I have an ear with these two files in the root:
> jboss-seam.jar
> jboss-seam-booking.jar
> I want to get package info such as Implementation-Version from the class org.jboss.seam.Seam, which is in jboss-seam.jar.  However, Seam.class.getPackage().getImplementationVersion() returns the version from the manifest in jboss-seam-booking.jar.
> I found that the problem is in VFSClassLoaderPolicy.  getPackageInformation() will call findRoot("org/jboss/seam").  But it happens to look in jboss-seam-booking.jar first.  So it finds classes with the package org.jboss.seam.booking and returns the package info from the wrong jar.
> This change to VFSClassLoaderPolicy.findVirtualFileInfo() fixes the problem:
> protected VirtualFileInfo findVirtualFileInfo(String path)
>    {
>       VirtualFileInfo result = vfsCache.get(path);
>       if (result != null)
>          return result;
>       
>       for (VirtualFile root : roots)
>       {
>          try
>          {
>             VirtualFile file = root.getChild(path);
>             if (file != null)
>             {
>                // Must either be a file...
>                if (file.isLeaf())
>                {
>                   result = new VirtualFileInfo(file, root);
>                   vfsCache.put(path, result);
>                   return result;
>                }
>                
>                // ... or have a child that is a file
>                for (VirtualFile child : file.getChildren())
>                {
>                   if (!child.isLeaf()) continue;
>                   result = new VirtualFileInfo(file, root);
>                   vfsCache.put(path, result);
>                   return result;
>                }
>             }
>          }
>          catch (Exception ignored)
>          {
>          }
>       }
>       return null;
>    }
> I didn't want to commit this without someone else looking at it.  There are two concerns:
> 1) Searching all the children might have a performance impact?
> 2) Would this cause a problem for other code paths that use findVirtualFileInfo()?

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