ColumnImpl.AutoNumberGenerator (Jackcess 5.0.0 API)

java.lang.Object
- com.healthmarketscience.jackcess.impl.ColumnImpl.AutoNumberGenerator

Enclosing class:

ColumnImpl
```
public abstract class ColumnImpl.AutoNumberGenerator
extends Object
```
Base class for the supported autonumber types.

Usage:

Advanced: This class is for advanced/internal use.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract Object`	`getLast()`	Returns the last autonumber generated by this generator.
`abstract Object`	`getNext(com.healthmarketscience.jackcess.impl.TableImpl.WriteRowState writeRowState)`	Returns the next autonumber for this generator.
`abstract DataType`	`getType()`	Returns the type of values generated by this generator.
`abstract Object`	`handleInsert(com.healthmarketscience.jackcess.impl.TableImpl.WriteRowState writeRowState, Object inRowValue)`	Returns a valid autonumber for this generator.
`abstract void`	`restoreLast(Object last)`	Restores a previous autonumber generated by this generator.

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

- Method Detail
  - getLast
```
public abstract Object getLast()
```
    Returns the last autonumber generated by this generator. Only valid after a call to Table.addRow(java.lang.Object...), otherwise undefined.
  - getNext
```
public abstract Object getNext(com.healthmarketscience.jackcess.impl.TableImpl.WriteRowState writeRowState)
```
    Returns the next autonumber for this generator.
    Warning, calling this externally will result in this value being "lost" for the table.
  - handleInsert
```
public abstract Object handleInsert(com.healthmarketscience.jackcess.impl.TableImpl.WriteRowState writeRowState,
                                    Object inRowValue)
                             throws IOException
```
    Returns a valid autonumber for this generator.
    Warning, calling this externally may result in this value being "lost" for the table.
    
    Throws:
    
    IOException
  - restoreLast
```
public abstract void restoreLast(Object last)
```
    Restores a previous autonumber generated by this generator.
  - getType
```
public abstract DataType getType()
```
    Returns the type of values generated by this generator.