private int instrumentZip(final InputStream input, final OutputStream output, final String name) throws IOException { final ZipInputStream zipin = new ZipInputStream(input); final ZipOutputStream zipout = new ZipOutputStream(output); ZipEntry entry; int count = 0; while ((entry = nextEntry(zipin, name)) != null) { final String entryName = entry.getName(); if (signatureRemover.removeEntry(entryName)) { continue; } zipout.putNextEntry(new ZipEntry(entryName)); if (!signatureRemover.filterEntry(entryName, zipin, zipout)) { count += instrumentAll(zipin, zipout, name + "@" + entryName); } zipout.closeEntry(); } zipout.finish(); return count; }