HashUtils (JavaLib (Java 7) version 0.6.1 Javadoc API)

java.lang.Object
- org.danilopianini.lang.HashUtils

public final class HashUtils
extends Object

Field Summary

Fields
Modifier and Type	Field and Description
`private static Charset`	`CHARSET`
`private static int`	`MASK_BYTE`
`private static com.google.common.hash.HashFunction`	`MURMUR128`
`private static com.google.common.hash.HashFunction`	`MURMUR32`
`private static int`	`SHIFT3`
`private static int`	`SHIFT4`
`private static int`	`SHIFT5`
`private static int`	`SHIFT6`
`private static int`	`SHIFT7`

Constructor Summary

Constructors
Modifier Constructor and Description

private HashUtils()

Constructors
Modifier	Constructor and Description
`private`	`HashUtils()`

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`static int`	`djb2int32(byte... bytes)`
`static int`	`djb2int32(double... bytes)`
`static int`	`djb2int32(int... bytes)`
`static int`	`djb2int32obj(Serializable... bytes)` Deprecated. This method may perform very badly, since it serializes objects in-memory. Prefer `hash32(Object...)`.
`static long`	`djb2long64(byte... bytes)`
`static long`	`djb2long64(double... bytes)`
`static long`	`djb2long64(int... bytes)`
`static long`	`djb2long64obj(Serializable... bytes)` Deprecated. This method may perform very badly, since it serializes objects in-memory. Prefer `hash64(Object...)`.
`static int`	`hash32(CharSequence data)` Computes a 32bit hash.
`static int`	`hash32(double data)` Computes a 32bit hash.
`static int`	`hash32(Double data)` Computes a 32bit hash.
`static int`	`hash32(float data)` Computes a 32bit hash.
`static int`	`hash32(Float data)` Computes a 32bit hash.
`static int`	`hash32(Integer data)` Computes a 32bit hash.
`static int`	`hash32(long data)` Computes a 32bit hash.
`static int`	`hash32(Long data)` Computes a 32bit hash.
`static int`	`hash32(Object... data)` Computes a 32bit hash.
`static long`	`hash64(CharSequence data)` Computes a 64bit hash.
`static long`	`hash64(double data)` Computes a 64bit hash.
`static long`	`hash64(Double data)` Computes a 64bit hash.
`static long`	`hash64(float data)` Computes a 64bit hash.
`static long`	`hash64(Float data)` Computes a 64bit hash.
`static long`	`hash64(Integer data)` Computes a 64bit hash.
`static long`	`hash64(long data)` Computes a 64bit hash.
`static long`	`hash64(Long data)` Computes a 64bit hash.
`static long`	`hash64(Object... data)` Computes a 64bit hash.
`static boolean`	`pointerEquals(Object a, Object b)` Runs System.identityHashCode(a) == System.identityHashCode(b).
`private static void`	`populateHasher(Object data, com.google.common.hash.Hasher h)`
`static byte[]`	`toByta(double data)`
`static byte[]`	`toByta(double[] data)`
`static byte[]`	`toByta(float data)`
`static byte[]`	`toByta(float[] data)`
`static byte[]`	`toByta(int data)`
`static byte[]`	`toByta(int[] data)`
`static byte[]`	`toByta(long data)`
`static byte[]`	`toByta(long[] data)`

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

- Field Detail
  - MURMUR32
```
private static final com.google.common.hash.HashFunction MURMUR32
```
  - MURMUR128
```
private static final com.google.common.hash.HashFunction MURMUR128
```
  - CHARSET
```
private static final Charset CHARSET
```
  - MASK_BYTE
```
private static final int MASK_BYTE
```
    See Also:
    
    Constant Field Values
  - SHIFT3
```
private static final int SHIFT3
```
    See Also:
    
    Constant Field Values
  - SHIFT4
```
private static final int SHIFT4
```
    See Also:
    
    Constant Field Values
  - SHIFT5
```
private static final int SHIFT5
```
    See Also:
    
    Constant Field Values
  - SHIFT6
```
private static final int SHIFT6
```
    See Also:
    
    Constant Field Values
  - SHIFT7
```
private static final int SHIFT7
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - HashUtils
```
private HashUtils()
```
- Method Detail
  - hash32
```
public static int hash32(double data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash32
```
public static int hash32(long data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash32
```
public static int hash32(float data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash32
```
public static int hash32(CharSequence data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash32
```
public static int hash32(Integer data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash32
```
public static int hash32(Float data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash32
```
public static int hash32(Double data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash32
```
public static int hash32(Long data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash32
```
public static int hash32(Object... data)
```
    Computes a 32bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 32bit hash
  - hash64
```
public static long hash64(double data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - hash64
```
public static long hash64(long data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - hash64
```
public static long hash64(float data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - hash64
```
public static long hash64(CharSequence data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - hash64
```
public static long hash64(Integer data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - hash64
```
public static long hash64(Float data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - hash64
```
public static long hash64(Double data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - hash64
```
public static long hash64(Long data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - hash64
```
public static long hash64(Object... data)
```
    Computes a 64bit hash.
    
    Parameters:
    
    data - the data to hash
    
    Returns:
    
    a 64bit hash
  - populateHasher
```
private static void populateHasher(Object data,
                                   com.google.common.hash.Hasher h)
```
  - djb2int32
```
public static int djb2int32(byte... bytes)
```
    Parameters:
    
    bytes - bytes
    
    Returns:
    
    DJB2 32bit hash
  - djb2int32
```
public static int djb2int32(double... bytes)
```
    Parameters:
    
    bytes - bytes
    
    Returns:
    
    DJB2 32bit hash
  - djb2int32
```
public static int djb2int32(int... bytes)
```
    Parameters:
    
    bytes - bytes
    
    Returns:
    
    DJB2 32bit hash
  - djb2int32obj
```
@Deprecated
public static int djb2int32obj(Serializable... bytes)
```
    Deprecated. This method may perform very badly, since it serializes objects in-memory. Prefer hash32(Object...).
    
    Parameters:
    
    bytes - bytes
    
    Returns:
    
    DJB2 32bit hash
  - djb2long64
```
public static long djb2long64(byte... bytes)
```
    Parameters:
    
    bytes - bytes
    
    Returns:
    
    DJB2 64bit hash
  - djb2long64
```
public static long djb2long64(double... bytes)
```
    Parameters:
    
    bytes - bytes
    
    Returns:
    
    DJB2 64bit hash
  - djb2long64
```
public static long djb2long64(int... bytes)
```
    Parameters:
    
    bytes - bytes
    
    Returns:
    
    DJB2 64bit hash
  - djb2long64obj
```
@Deprecated
public static long djb2long64obj(Serializable... bytes)
```
    Deprecated. This method may perform very badly, since it serializes objects in-memory. Prefer hash64(Object...).
    
    Parameters:
    
    bytes - bytes
    
    Returns:
    
    DJB2 64bit hash
  - toByta
```
public static byte[] toByta(double data)
```
    Parameters:
    
    data - double
    
    Returns:
    
    byte[]
  - toByta
```
public static byte[] toByta(double[] data)
```
    Parameters:
    
    data - double[]
    
    Returns:
    
    byte[]
  - toByta
```
public static byte[] toByta(float data)
```
    Parameters:
    
    data - float
    
    Returns:
    
    byte[]
  - toByta
```
public static byte[] toByta(float[] data)
```
    Parameters:
    
    data - float[]
    
    Returns:
    
    byte[]
  - toByta
```
public static byte[] toByta(int data)
```
    Parameters:
    
    data - int
    
    Returns:
    
    byte[]
  - toByta
```
public static byte[] toByta(int[] data)
```
    Parameters:
    
    data - int[]
    
    Returns:
    
    byte[]
  - toByta
```
public static byte[] toByta(long data)
```
    Parameters:
    
    data - long
    
    Returns:
    
    byte[]
  - toByta
```
public static byte[] toByta(long[] data)
```
    Parameters:
    
    data - long[]
    
    Returns:
    
    byte[]
  - pointerEquals
```
public static boolean pointerEquals(Object a,
                                    Object b)
```
    Runs System.identityHashCode(a) == System.identityHashCode(b). In most JVM implementations, this is actually a pointer comparison. Nevertheless, this is not guaranteed: handle with care
    
    Parameters:
    
    a - an Object
    
    b - another Object
    
    Returns:
    
    System.identityHashCode(a) == System.identityHashCode(b)

Class HashUtils

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MURMUR32

MURMUR128

CHARSET

MASK_BYTE

SHIFT3

SHIFT4

SHIFT5

SHIFT6

SHIFT7

Constructor Detail

HashUtils

Method Detail

hash32

hash32

hash32

hash32

hash32

hash32

hash32

hash32

hash32

hash64

hash64

hash64

hash64

hash64

hash64

hash64

hash64

hash64

populateHasher

djb2int32

djb2int32

djb2int32

djb2int32obj

djb2long64

djb2long64

djb2long64

djb2long64obj

toByta

toByta

toByta

toByta

toByta

toByta

toByta

toByta

pointerEquals