/** Caclulates an MD5 hash for each file in the archive. */
public String[] getMD5s() throws FileNotFoundException, NoSuchAlgorithmException, IOException {
/**
* This could be more efficiently handled during the output phase using a filtering channel, but
* would require placeholder values in the archive and some state. This is left for a later
* refactoring.
*/
final ByteBuffer buffer = ByteBuffer.allocate(4096);
String[] array = new String[headers.size()];
int x = 0;
for (CpioHeader header : headers) {
Object object = sources.get(header);
String value = "";
if (object instanceof File) {
final ReadableChannelWrapper input =
new ReadableChannelWrapper(new FileInputStream((File) object).getChannel());
final Key<byte[]> key = input.start("MD5");
while (input.read(buffer) != -1) buffer.rewind();
value = new String(Util.hex(input.finish(key)));
input.close();
} else if (object instanceof URL) {
final ReadableChannelWrapper input =
new ReadableChannelWrapper(
Channels.newChannel(((URL) object).openConnection().getInputStream()));
final Key<byte[]> key = input.start("MD5");
while (input.read(buffer) != -1) buffer.rewind();
value = new String(Util.hex(input.finish(key)));
input.close();
}
array[x++] = value;
}
return array;
}
public static Format readFormat(ReadableChannelWrapper in) throws Exception {
Format format = new Format();
Key<Integer> lead = in.start();
format.getLead().read(in);
LOG.trace("Lead ended at '" + in.finish(lead) + "'.");
Key<Integer> signature = in.start();
int count = format.getSignature().read(in);
int expected =
ByteBuffer.wrap((byte[]) format.getSignature().getEntry(SIGNATURES).getValues(), 8, 4)
.getInt()
/ -16;
LOG.trace(
"Signature ended at '"
+ in.finish(signature)
+ "' and contained '"
+ count
+ "' headers (expected '"
+ expected
+ "').");
Key<Integer> header = in.start();
count = format.getHeader().read(in);
expected =
ByteBuffer.wrap((byte[]) format.getHeader().getEntry(HEADERIMMUTABLE).getValues(), 8, 4)
.getInt()
/ -16;
LOG.trace(
"Header ended at '"
+ in.finish(header)
+ " and contained '"
+ count
+ "' headers (expected '"
+ expected
+ "').");
return format;
}