static int zip2zip_withPredicate(File inZip, ZipOutputStream outZip, IF1<S, Bool> predicate) ctex {
  temp ZipFile zipFile = new ZipFile(inZip);
  Enumeration entries = zipFile.entries();
  int n = 0;
  while (entries.hasMoreElements()) {
    ZipEntry entry = (ZipEntry) entries.nextElement(); 
    continue unless predicate.get(entry.getName());
    ++n;
    outZip.putNextEntry(new ZipEntry(entry.getName()));
    
    InputStream fin = zipFile.getInputStream(entry);
    copyStream(fin, outZip);
    fin.close();
  }
  ret n;
}

static int zip2zip_withPredicate(File inZip, File outZip, IF1<S, Bool> predicate) {
  temp ZipOutputStream outStream = zipOutputStream(outZip);
  ret zip2zip_withPredicate(inZip, outStream, predicate);
}