ReproducibleUUIDs (Ristretto 2.0.0 API)

java.lang.Object
- org.leplus.ristretto.util.ReproducibleUUIDs

```
public final class ReproducibleUUIDs
extends Object
```
This class contains utility methods that generate deterministic UUIDs. Meaning that given the same input, these methods will always return the same UUID, as opposed to UUID.randomUUID(). The produced UUIDs may not be universally unique (since other code using the same method on the same input would have produce the same UUIDs) but it can still be useful in situations where you need exactly that: be able to generate a UUID and now that other parts of a system will be able to generate a matching UUID for the same input.
For example if two parts of a system receive a file and need to independently produce pieces of data that will later have to be reconciled. Then each piece of data could have it's own unique UUID plus a reference UUID generated from the file using one of the methods below. Then both parts of the system will have generated the same reference UUID allowing for easier reconciliation.

Since:

1.0.0

Author:

Thomas Leplus

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static UUID`	`fromByteBuffer(ByteBuffer buffer)`	Generates a UUID from the given byte buffer.
`static UUID`	`fromBytes(byte... bytes)`	Generates a UUID from the given bytes.
`static UUID`	`fromInputStream(InputStream input)`	Generates a UUID from the given input stream.
`static UUID`	`fromString(String s)`	Generates a UUID from the given String.
`static UUID`	`fromUUIDs(UUID... uuids)`	Generates a UUID from the given UUIDs.

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

- Method Detail
  - fromString
```
public static UUID fromString(String s)
```
    Generates a UUID from the given String. The same String will always produce the same UUID.
    
    Parameters:
    
    s - the input string.
    
    Returns:
    
    the resulting UUID.
  - fromBytes
```
public static UUID fromBytes(byte... bytes)
```
    Generates a UUID from the given bytes. The same bytes will always produce the same UUID.
    
    Parameters:
    
    bytes - the input bytes.
    
    Returns:
    
    the resulting UUID.
  - fromByteBuffer
```
public static UUID fromByteBuffer(ByteBuffer buffer)
```
    Generates a UUID from the given byte buffer. The same bytes will always produce the same UUID.
    
    Parameters:
    
    buffer - the input byte buffer.
    
    Returns:
    
    the resulting UUID.
  - fromInputStream
```
public static UUID fromInputStream(InputStream input)
                            throws IOException
```
    Generates a UUID from the given input stream. The same bytes will always produce the same UUID.
    
    Parameters:
    
    input - the input stream.
    
    Returns:
    
    the resulting UUID.
    
    Throws:
    
    IOException - if an I/O error occurs.
  - fromUUIDs
```
public static UUID fromUUIDs(UUID... uuids)
```
    Generates a UUID from the given UUIDs. The same UUIDs will always produce the same UUID.
    
    Parameters:
    
    uuids - the UUIDs.
    
    Returns:
    
    the resulting UUID.