org.prevayler.demos.memento.commands
Class Withdrawal

java.lang.Object
  org.prevayler.util.memento.MementoTransaction
      org.prevayler.demos.memento.commands.Withdrawal

All Implemented Interfaces:

Serializable

public class Withdrawal
extends MementoTransaction

See Also:

Serialized Form

Constructor Summary

Withdrawal(long accountNumber, long amount)

Method Summary

protected void	checkPrecondition() Check the precondition.
protected void	createMementos(MementoCollector collector) Create mementos for all objects which (possibly) get modified.
protected Account	execute(MementoCollector collector) Execute the actual command.
protected void	findObjects(Bank prevalentSystem) Find the objects this command modifies.

Methods inherited from class org.prevayler.util.memento.MementoTransaction

execute

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Withdrawal

public Withdrawal(long accountNumber,
                  long amount)

Method Detail

findObjects

protected void findObjects(Bank prevalentSystem)
                    throws Exception

Description copied from class: MementoTransaction

Find the objects this command modifies.

Specified by:

findObjects in class MementoTransaction

Parameters:

prevalentSystem - The prevalent system in which to find the objects.

Throws:

Exception

checkPrecondition

protected void checkPrecondition()
                          throws Exception

Description copied from class: MementoTransaction

Check the precondition.

Specified by:

checkPrecondition in class MementoTransaction

Throws:

Exception

createMementos

protected void createMementos(MementoCollector collector)

Description copied from class: MementoTransaction

Create mementos for all objects which (possibly) get modified.

Specified by:

createMementos in class MementoTransaction

Parameters:

collector - The memento collector to which to add the mementos.

execute

protected Account execute(MementoCollector collector)
                   throws Exception

Description copied from class: MementoTransaction

Execute the actual command.

Specified by:

execute in class MementoTransaction

Parameters:

collector - The memento collector which can be used to execute subcommands.

Returns:

The object returned by the execution of this command. Most commands simply return null.

Throws:

Exception