IDUtil (cayenne-doc: Cayenne Documentation 4.2 API)

java.lang.Object
- org.apache.cayenne.util.IDUtil

```
public class IDUtil
extends Object
```
helper class to generate pseudo-GUID sequences.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`appendFormattedByte(Appendable buffer, byte byteValue)`	Prints a byte value to a StringBuffer as a double digit hex value.
`static byte[]`	`pseudoUniqueByteSequence(int length)`
`static byte[]`	`pseudoUniqueByteSequence16()`
`static byte[]`	`pseudoUniqueByteSequence8()`
`static byte[]`	`pseudoUniqueSecureByteSequence(int length)`
`static byte[]`	`pseudoUniqueSecureByteSequence16()`

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

- Method Detail
  - appendFormattedByte
```
public static void appendFormattedByte(Appendable buffer,
                                       byte byteValue)
```
    Prints a byte value to a StringBuffer as a double digit hex value.
    
    Since:
    
    1.2 Since 3.0 signature has changed to take Appendable argument.
  - pseudoUniqueByteSequence
```
public static byte[] pseudoUniqueByteSequence(int length)
```
    Parameters:
    
    length - the length of returned byte[]
    
    Returns:
    
    A pseudo-unique byte array of the specified length. Length must be at least 16 bytes, or an exception is thrown.
    
    Since:
    
    1.0.2
  - pseudoUniqueSecureByteSequence
```
public static byte[] pseudoUniqueSecureByteSequence(int length)
```
  - pseudoUniqueByteSequence8
```
public static final byte[] pseudoUniqueByteSequence8()
```
  - pseudoUniqueByteSequence16
```
public static final byte[] pseudoUniqueByteSequence16()
```
    Returns:
    
    A pseudo unique 16-byte array.
  - pseudoUniqueSecureByteSequence16
```
public static byte[] pseudoUniqueSecureByteSequence16()
```
    Returns:
    
    A pseudo unique digested 16-byte array.