public XARRTestResource(String xarrHelper, File file) throws IOException {
        this.xarrHelper = xarrHelper;
        this.file = file;
        DataInputStream fis = new DataInputStream(new FileInputStream(file));
        final int formatId = fis.readInt();
        final int gtrid_length = fis.readInt();
        final byte[] gtrid = new byte[gtrid_length];
        fis.read(gtrid, 0, gtrid_length);
        final int bqual_length = fis.readInt();
        final byte[] bqual = new byte[bqual_length];
        fis.read(bqual, 0, bqual_length);
        xids.put(file, new Xid() {

            @Override
            public byte[] getGlobalTransactionId() {
                return gtrid;
            }

            @Override
            public int getFormatId() {
                return formatId;
            }

            @Override
            public byte[] getBranchQualifier() {
                return bqual;
            }
        });
        fis.close();
    }