docs: @Trivial
      private File getArchiveFile() {
          String methodName = "getArchiveFile";
  
          if ( archiveFileLock != null ) {
              synchronized ( archiveFileLock ) {
                  if ( (archiveFile == null) && !archiveFileFailed ) {
                      try {
                          archiveFile = extractEntry( entryInEnclosingContainer, getCacheDir() );
                          // 'extractEntry' throws IOException
  
                          if ( archiveFile != null ) {
                              archiveFilePath = archiveFile.getAbsolutePath();
                              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled() ) {
                                  Tr.debug(tc, methodName + " Archive file [ " + archiveFilePath + " ]");
                              }
                          } else {
                              archiveFileFailed = true;
                              Tr.error(tc, "extract.cache.null", entryInEnclosingContainer.getPath());
                          }
  
                      } catch ( IOException e ) {
                          archiveFileFailed = true;
                          Tr.error(tc, "extract.cache.fail", e.getMessage());
                      }
                  }
              }
          }
  
          return archiveFile;
      }