UnsavedValueStrategy (Hibernate Javadocs)

All Known Implementing Classes:

IdentifierValue, VersionValue
```
public interface UnsavedValueStrategy
```
The base contract for determining transient status versus detached status.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`@Nullable Object`	`getDefaultValue(@Nullable Object currentValue)`	Get a default value meant to indicate transience.
`@Nullable Boolean`	`isUnsaved(@Nullable Object test)`	Make the transient/detached determination

- Method Detail
  - isUnsaved
```
@Nullable Boolean isUnsaved(@Nullable Object test)
```
    Make the transient/detached determination
    
    Parameters:
    
    test - The value to be tested
    
    Returns:
    
    true indicates the value corresponds to unsaved data (aka, transient state); false indicates the value does not corresponds to unsaved data (aka, detached state); null indicates that this strategy was not able to determine conclusively.
  - getDefaultValue
```
@Nullable Object getDefaultValue(@Nullable Object currentValue)
```
    Get a default value meant to indicate transience.
    
    Parameters:
    
    currentValue - The current state value.
    
    Returns:
    
    The default transience value.