ToUUID (VirtualDataSet API)

java.lang.Object
- io.virtdata.libbasics.shared.from_long.to_uuid.ToUUID

All Implemented Interfaces:

java.util.function.LongFunction<java.util.UUID>
```
public class ToUUID
extends java.lang.Object
implements java.util.function.LongFunction<java.util.UUID>
```
This function creates a non-random UUID in the type 4 version (Random). It always puts the same value in the MSB position of the UUID format. The input value is put in the LSB position.
```
 xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx
 mmmmmmmm-mmmm-Mmmm-Llll-llllllllllll
               4    3
 
```
As shown above, the LSB position does not have the complication of having a version identifier (position M) dividing the dynamic range of the data type. For this reason, only the LSB side is used for this mapper, which allows an effective range of Long.MAX_VALUE/8, given the loss of 3 digits of precision. This function is suitable for deterministic testing of scenarios which depend on type 4 UUIDs, but without the mandated randomness that makes testing difficult. Just be aware that the MSB will always contain value 0x0123456789ABCDEFL unless you specify a different long value to pre-fill it with.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  ToUUID()
  
  ToUUID(long msbs)
- Method Summary
  
  Modifier and Type Method Description
  
  java.util.UUID apply(long value)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ToUUID
```
public ToUUID()
```
  - ToUUID
```
public ToUUID(long msbs)
```
- Method Detail
  - apply
```
public java.util.UUID apply(long value)
```
    Specified by:
    
    apply in interface java.util.function.LongFunction<java.util.UUID>