hu.webarticum.chm

Interface Command

All Known Implementing Classes:

AbstractCommand, CommandAggregation

public interface Command

Undoable operation.

Method Summary

Modifier and Type	Method and Description
boolean	execute() Executes this command
java.util.Date	getTime() Returns time when this command was first executed.
boolean	isExecuted() Returns true if command have been already executed and is not rolled back.
boolean	rollBack() Rolls back this command
void	setExecuted(boolean executed) Explicitly sets executed status, do not perform any execution or roll-backing.

Method Detail

execute

boolean execute()

Executes this command

Returns:

true if command was successfully executed

rollBack

boolean rollBack()

Rolls back this command

Returns:

true if command was successfully rolled back

setExecuted

void setExecuted(boolean executed)

Explicitly sets executed status, do not perform any execution or roll-backing. Use this if operation already performed elsewhere. It should not be invoked before this command executed (unless the command's implementation is properly prepared for this).

isExecuted

boolean isExecuted()

Returns true if command have been already executed and is not rolled back.

Returns:

true if command have been already executed

getTime

java.util.Date getTime()

Returns time when this command was first executed.

Returns:

time when this command was first executed or null