Package gw.util.fingerprint
Class FP64
- java.lang.Object
-
- gw.util.fingerprint.FP64
-
public final class FP64 extends Object
-
-
Constructor Summary
Constructors Constructor Description FP64()
Initializes this object to the fingerprint of the empty string.FP64(byte[] bytes)
Initializes this object to the fingerprint of the byte arraybytes
, which must be non-null.FP64(byte[] bytes, int start, int length)
Initializes this object to the fingerprint of the bytesbytes[start]..bytes[start+length-1]
.FP64(char[] chars)
Initializes this object to the fingerprint of the character arraychars
, which must be non-null.FP64(char[] chars, int start, int length)
Initializes this object to the fingerprint of the characterschars[start]..chars[start+length-1]
.FP64(FP64 fp)
Initializes this fingerprint to a copy offp
, which must be non-null.FP64(InputStream stream)
Initializes this object to the fingerprint of the bytes instream
, which must be non-null.FP64(String s)
Initializes this object to the fingerprint of the Strings
, which must be non-null.FP64(ByteBuffer buffer)
Initializes this object to the fingerprint of the bytes inbuffer
, which must be non-null.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(Object obj)
FP64
extend(byte b)
Extends this fingerprint by the byteb
.FP64
extend(byte[] bytes)
Extends this fingerprint by the bytesFP64
extend(byte[] bytes, int start, int len)
Extends this fingerprint by the bytesbytes[offset]..bytes[offset+length-1]
.FP64
extend(char c)
Extends this fingerprint by the characterc
.FP64
extend(char[] chars)
Extends this fingerprint by the characterschars[start]..chars[start+length-1]
.FP64
extend(char[] chars, int start, int len)
Extends this fingerprint by the characterschars[start]..chars[start+length-1]
.FP64
extend(int i)
Extends this fingerprint by the integeri
.FP64
extend(long i)
Extends this fingerprint by the integeri
.FP64
extend(InputStream stream)
Extends this fingerprint by the bytes of the streamstream
, which must be non-null.FP64
extend(String s)
Extends this fingerprint by the characters of the Strings
, which must be non-null.FP64
extend(ByteBuffer buffer)
long
getRawFingerprint()
int
hashCode()
byte[]
toBytes()
Returns the value of this fingerprint as a newly-allocated array of 8 bytes.byte[]
toBytes(byte[] buff)
Returns the value of this fingerprint as an 8-byte array.String
toHexString()
Returns the value of this fingerprint as an unsigned integer encoded in base 16 (hexideicmal), padded with leading zeros to a total length of 16 characters.String
toString()
-
-
-
Constructor Detail
-
FP64
public FP64()
Initializes this object to the fingerprint of the empty string.
-
FP64
public FP64(FP64 fp)
Initializes this fingerprint to a copy offp
, which must be non-null.
-
FP64
public FP64(String s)
Initializes this object to the fingerprint of the Strings
, which must be non-null.
-
FP64
public FP64(char[] chars)
Initializes this object to the fingerprint of the character arraychars
, which must be non-null.
-
FP64
public FP64(char[] chars, int start, int length)
Initializes this object to the fingerprint of the characterschars[start]..chars[start+length-1]
.
-
FP64
public FP64(byte[] bytes)
Initializes this object to the fingerprint of the byte arraybytes
, which must be non-null.
-
FP64
public FP64(byte[] bytes, int start, int length)
Initializes this object to the fingerprint of the bytesbytes[start]..bytes[start+length-1]
.
-
FP64
public FP64(InputStream stream) throws IOException
Initializes this object to the fingerprint of the bytes instream
, which must be non-null.- Throws:
IOException
- if an error is encountered readingstream
.
-
FP64
public FP64(ByteBuffer buffer) throws IOException
Initializes this object to the fingerprint of the bytes inbuffer
, which must be non-null.- Throws:
IOException
- if an error is encountered readingstream
.
-
-
Method Detail
-
toBytes
public byte[] toBytes()
Returns the value of this fingerprint as a newly-allocated array of 8 bytes.Important: If the output of this function is subsequently fingerprinted, the probabilistic guarantee is lost. That is, there is a much higher liklihood of fingerprint collisions if fingerprint values are themselves fingerprinted in any way.
-
toBytes
public byte[] toBytes(byte[] buff)
Returns the value of this fingerprint as an 8-byte array. UnliketoBytes()
, this variant does not perform an allocation. Instead, the client passes in a buffer into which the fingerprint value is written. This can be used to get the values of a set of fingerprints without having to perform an allocation for each one.- Parameters:
buff
- The buffer into which the bytes will be written. This array is required to be non-null and exactly 8 bytes in length. This buffer is returned.
-
toHexString
public String toHexString()
Returns the value of this fingerprint as an unsigned integer encoded in base 16 (hexideicmal), padded with leading zeros to a total length of 16 characters.Important: If the output of this function is subsequently fingerprinted, the probabilistic guarantee is lost. That is, there is a much higher liklihood of fingerprint collisions if fingerprint values are themselves fingerprinted in any way.
-
extend
public FP64 extend(String s)
Extends this fingerprint by the characters of the Strings
, which must be non-null.- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(char[] chars)
Extends this fingerprint by the characterschars[start]..chars[start+length-1]
.- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(char[] chars, int start, int len)
Extends this fingerprint by the characterschars[start]..chars[start+length-1]
.- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(byte[] bytes, int start, int len)
Extends this fingerprint by the bytesbytes[offset]..bytes[offset+length-1]
.- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(byte[] bytes)
Extends this fingerprint by the bytes- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(int i)
Extends this fingerprint by the integeri
.- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(long i)
Extends this fingerprint by the integeri
.- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(char c)
Extends this fingerprint by the characterc
.- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(byte b)
Extends this fingerprint by the byteb
.- Returns:
- the resulting fingerprint.
-
extend
public FP64 extend(InputStream stream) throws IOException
Extends this fingerprint by the bytes of the streamstream
, which must be non-null.- Returns:
- the resulting fingerprint.
- Throws:
IOException
- if an error is encountered readingstream
.
-
extend
public FP64 extend(ByteBuffer buffer) throws IOException
- Throws:
IOException
-
getRawFingerprint
public long getRawFingerprint()
-
-