com.googlecode.jpattern.core.command
Class NullCommand

java.lang.Object
  com.googlecode.jpattern.core.command.ICommand
      com.googlecode.jpattern.core.command.NullCommand

All Implemented Interfaces:

java.io.Serializable

public class NullCommand
extends ICommand

Author:

Francesco Cina' 27/feb/2011

See Also:

Serialized Form

Constructor Summary

NullCommand()

Method Summary

ICommandResult	exec() This method launch the execution of the command (or chain of commands) using the default DefaultCommandExecutor.
ICommandResult	exec(ICommandExecutor asyncCommandPool) This method launch the execution of the command (or chain of commands).
ICommandResult	rollback() This method launch the rollback of the command (or chain of commands) using the default DefaultCommandExecutor.
ICommandResult	rollback(ICommandExecutor aCommandExecutor) This method launch the rollback of the command (or chain of commands).
ICommandResult	rollback(ICommandResult execResult) This method launch the rollback of the command (or chain of commands) only if the ICommandExecutor passed as parameter is not valid.
ICommandResult	rollback(ICommandResult execResult, ICommandExecutor aCommandExecutor) This method launch the rollback of the command (or chain of commands) only if the ICommandExecutor passed as parameter is not valid.
void	visit(IProvider provider)

Methods inherited from class java.lang.Object

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

Constructor Detail

NullCommand

public NullCommand()

Method Detail

exec

public ICommandResult exec(ICommandExecutor asyncCommandPool)

Description copied from class: ICommand

This method launch the execution of the command (or chain of commands). Every command in the chain will be managed by an ICommandExecutor object

Specified by:

exec in class ICommand

Parameters:

asyncCommandPool - the pool in which the command will runs

Returns:

the result of the execution

exec

public ICommandResult exec()

Description copied from class: ICommand

This method launch the execution of the command (or chain of commands) using the default DefaultCommandExecutor. This command is the same of: exec(new ConditionalCommandExecutor());

Specified by:

exec in class ICommand

Returns:

the result of the execution

visit

public void visit(IProvider provider)

Specified by:

visit in class ICommand

rollback

public ICommandResult rollback()

Description copied from class: ICommand

This method launch the rollback of the command (or chain of commands) using the default DefaultCommandExecutor. This command is the same of: rollback(new ConditionalCommandExecutor());

Specified by:

rollback in class ICommand

Returns:

the result of the rollback

rollback

public ICommandResult rollback(ICommandResult execResult)

Description copied from class: ICommand

This method launch the rollback of the command (or chain of commands) only if the ICommandExecutor passed as parameter is not valid. The DefaultCommandExecutor will be used This command is the same of: rollback(execResult, new ConditionalCommandExecutor());

Specified by:

rollback in class ICommand

Parameters:

execResult - the result of a Command execution

Returns:

the result of the rollback

rollback

public ICommandResult rollback(ICommandExecutor aCommandExecutor)

Description copied from class: ICommand

This method launch the rollback of the command (or chain of commands). Every command in the chain will be managed by an ICommandExecutor object

Specified by:

rollback in class ICommand

Parameters:

aCommandExecutor - the pool in which the command will runs

Returns:

the result of the rollback

rollback

public ICommandResult rollback(ICommandResult execResult,
                               ICommandExecutor aCommandExecutor)

Description copied from class: ICommand

This method launch the rollback of the command (or chain of commands) only if the ICommandExecutor passed as parameter is not valid. The ICommandExecutor passed as a parameter will be used.

Specified by:

rollback in class ICommand

Parameters:

execResult - the result of a Command execution

aCommandExecutor - the pool in which the command will runs

Returns:

the result of the rollback