java.lang.Object
- gw.util.fingerprint.FP64

public final class FP64
extends java.lang.Object

Field Summary

Fields
Modifier and Type	Field	Description
`private long`	`_fp`
`private static long[]`	`ByteModTable`
`private static long`	`IrredPoly`
`private static java.lang.String`	`LEADING_ZEROS`
`private static long`	`One`
`private static long`	`X63`
`private static long`	`Zero`

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 array `bytes`, which must be non-null.
`FP64(byte[] bytes, int start, int length)`	Initializes this object to the fingerprint of the bytes `bytes[start]..bytes[start+length-1]`.
`FP64(char[] chars)`	Initializes this object to the fingerprint of the character array `chars`, which must be non-null.
`FP64(char[] chars, int start, int length)`	Initializes this object to the fingerprint of the characters `chars[start]..chars[start+length-1]`.
`FP64(FP64 fp)`	Initializes this fingerprint to a copy of `fp`, which must be non-null.
`FP64(java.io.InputStream stream)`	Initializes this object to the fingerprint of the bytes in `stream`, which must be non-null.
`FP64(java.lang.String s)`	Initializes this object to the fingerprint of the String `s`, which must be non-null.
`FP64(java.nio.ByteBuffer buffer)`	Initializes this object to the fingerprint of the bytes in `buffer`, which must be non-null.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(java.lang.Object obj)`
`FP64`	`extend(byte b)`	Extends this fingerprint by the byte `b`.
`FP64`	`extend(byte[] bytes)`	Extends this fingerprint by the bytes
`FP64`	`extend(byte[] bytes, int start, int len)`	Extends this fingerprint by the bytes `bytes[offset]..bytes[offset+length-1]`.
`FP64`	`extend(char c)`	Extends this fingerprint by the character `c`.
`FP64`	`extend(char[] chars)`	Extends this fingerprint by the characters `chars[start]..chars[start+length-1]`.
`FP64`	`extend(char[] chars, int start, int len)`	Extends this fingerprint by the characters `chars[start]..chars[start+length-1]`.
`FP64`	`extend(int i)`	Extends this fingerprint by the integer `i`.
`FP64`	`extend(long i)`	Extends this fingerprint by the integer `i`.
`FP64`	`extend(java.io.InputStream stream)`	Extends this fingerprint by the bytes of the stream `stream`, which must be non-null.
`FP64`	`extend(java.lang.String s)`	Extends this fingerprint by the characters of the String `s`, which must be non-null.
`FP64`	`extend(java.nio.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.
`java.lang.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.
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - _fp
```
private long _fp
```
  - LEADING_ZEROS
```
private static final java.lang.String LEADING_ZEROS
```
    See Also:
    
    Constant Field Values
  - Zero
```
private static final long Zero
```
    See Also:
    
    Constant Field Values
  - One
```
private static final long One
```
    See Also:
    
    Constant Field Values
  - IrredPoly
```
private static final long IrredPoly
```
    See Also:
    
    Constant Field Values
  - X63
```
private static final long X63
```
    See Also:
    
    Constant Field Values
  - ByteModTable
```
private static long[] ByteModTable
```
- 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 of fp, which must be non-null.
  - FP64
```
public FP64(java.lang.String s)
```
    Initializes this object to the fingerprint of the String s, which must be non-null.
  - FP64
```
public FP64(char[] chars)
```
    Initializes this object to the fingerprint of the character array chars, which must be non-null.
  - FP64
```
public FP64(char[] chars,
            int start,
            int length)
```
    Initializes this object to the fingerprint of the characters chars[start]..chars[start+length-1].
  - FP64
```
public FP64(byte[] bytes)
```
    Initializes this object to the fingerprint of the byte array bytes, which must be non-null.
  - FP64
```
public FP64(byte[] bytes,
            int start,
            int length)
```
    Initializes this object to the fingerprint of the bytes bytes[start]..bytes[start+length-1].
  - FP64
```
public FP64(java.io.InputStream stream)
     throws java.io.IOException
```
    Initializes this object to the fingerprint of the bytes in stream, which must be non-null.
    
    Throws:
    
    java.io.IOException - if an error is encountered reading stream.
  - FP64
```
public FP64(java.nio.ByteBuffer buffer)
     throws java.io.IOException
```
    Initializes this object to the fingerprint of the bytes in buffer, which must be non-null.
    
    Throws:
    
    java.io.IOException - if an error is encountered reading stream.
- 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. Unlike toBytes(), 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 java.lang.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(java.lang.String s)
```
    Extends this fingerprint by the characters of the String s, which must be non-null.
    
    Returns:
    
    the resulting fingerprint.
  - extend
```
public FP64 extend(char[] chars)
```
    Extends this fingerprint by the characters chars[start]..chars[start+length-1].
    
    Returns:
    
    the resulting fingerprint.
  - extend
```
public FP64 extend(char[] chars,
                   int start,
                   int len)
```
    Extends this fingerprint by the characters chars[start]..chars[start+length-1].
    
    Returns:
    
    the resulting fingerprint.
  - extend
```
public FP64 extend(byte[] bytes,
                   int start,
                   int len)
```
    Extends this fingerprint by the bytes bytes[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 integer i.
    
    Returns:
    
    the resulting fingerprint.
  - extend
```
public FP64 extend(long i)
```
    Extends this fingerprint by the integer i.
    
    Returns:
    
    the resulting fingerprint.
  - extend
```
public FP64 extend(char c)
```
    Extends this fingerprint by the character c.
    
    Returns:
    
    the resulting fingerprint.
  - extend
```
public FP64 extend(byte b)
```
    Extends this fingerprint by the byte b.
    
    Returns:
    
    the resulting fingerprint.
  - extend
```
public FP64 extend(java.io.InputStream stream)
            throws java.io.IOException
```
    Extends this fingerprint by the bytes of the stream stream, which must be non-null.
    
    Returns:
    
    the resulting fingerprint.
    
    Throws:
    
    java.io.IOException - if an error is encountered reading stream.
  - extend
```
public FP64 extend(java.nio.ByteBuffer buffer)
            throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Overrides:
    
    equals in class java.lang.Object
  - getRawFingerprint
```
public long getRawFingerprint()
```
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

Class FP64

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

_fp

LEADING_ZEROS

Zero

One

IrredPoly

X63

ByteModTable

Constructor Detail

FP64

FP64

FP64

FP64

FP64

FP64

FP64

FP64

FP64

Method Detail

toBytes

toBytes

toHexString

extend

extend

extend

extend

extend

extend

extend

extend

extend

extend

extend

hashCode

equals

getRawFingerprint

toString