Thanks to PJ and Andi and the POI team, we've integrated 5.2.0 into Apache Tika, and we're about to make a release of 2.3.0.

I noticed a bunch of logged warnings: "The close() method is intended to SAVE a package. This package is open in READ ONLY mode, use the revert() method instead!"

We've wrapped our use of OPCPackage so that we're calling revert() everywhere.  

However, in our zip detector, when trying to figure out if a zip is an OPCPackage, we call OPCPackage.open(ZipEntrySource zipEntry), and if there's an exception, we swallow it and figure that zip file is not an OPCPackage.

The problem is that at the POI level, IOUtils.closeQuietly() is called on the pack after it is created in the catch block. 


Is there a cleaner way with POI to determine if a zip file is an OPCPackage?


Should we be calling revert() instead at the POI level to avoid this warning?

Code:

    public static OPCPackage open(ZipEntrySource zipEntry) throws InvalidFormatException {
        ZipPackage pack = new ZipPackage(zipEntry, PackageAccess.READ);

        try {
            if (pack.partList == null) {
                pack.getParts();
            }

            return pack;
        } catch (RuntimeException | InvalidFormatException var3) {
            IOUtils.closeQuietly(pack);
            throw var3;
        }
    }