package org.rabinfingerprint;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.rabinfingerprint.fingerprint.RabinFingerprintLong;
import org.rabinfingerprint.fingerprint.RabinFingerprintLongWindowed;
import org.rabinfingerprint.polynomial.Polynomial;
import com.google.common.io.ByteStreams;
public class Samples {
public static void fingerprint() throws FileNotFoundException, IOException {
// Create new random irreducible polynomial
// These can also be created from Longs or hex Strings
Polynomial polynomial = Polynomial.createIrreducible(53);
// Create a fingerprint object
RabinFingerprintLong rabin = new RabinFingerprintLong(polynomial);
// Push bytes from a file stream
rabin.pushBytes(ByteStreams.toByteArray(new FileInputStream("file.test")));
// Get fingerprint value and output
System.out.println(Long.toString(rabin.getFingerprintLong(), 16));
}
public static void slidingWindowFingerprint() throws FileNotFoundException, IOException {
// Create new random irreducible polynomial
// These can also be created from Longs or hex Strings
Polynomial polynomial = Polynomial.createIrreducible(53);
// Create a windowed fingerprint object with a window size of 48 bytes.
RabinFingerprintLongWindowed window = new RabinFingerprintLongWindowed(polynomial, 48);
for (byte b : ByteStreams.toByteArray(new FileInputStream("file.test"))) {
// Push in one byte. Old bytes are automatically popped.
window.pushByte(b);
// Output current window's fingerprint
System.out.println(Long.toString(window.getFingerprintLong(), 16));
}
}
}