com.healthmarketscience.jackcess.impl
Class ColumnImpl.AutoNumberGenerator

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

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.