Package sources.client

Class Invoker

java.lang.Object

sources.client.Invoker

public class Invoker
extends Object

The Invoker class is responsible for executing commands and maintaining a history of executed commands.

Constructor Summary

Constructors

Constructor	Description
Invoker()

Method Summary

Modifier and Type	Method	Description
void	execute(AbstractCommand command)	Executes the specified command and adds it to the command history.
<T> T	executeAndReturn(AbstractCommandWithResult<T> command)	Executes the specified command with a result and adds it to the command history.
Stack<AbstractCommand>	getCommandHistory()	Returns the command history maintained by the invoker.

Methods inherited from class java.lang.Object

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

Constructor Details

Invoker

public Invoker()

Method Details

execute

public void execute(AbstractCommand command)
             throws CollectionKeyException,
WrongArgumentException,
CustomIOException

Executes the specified command and adds it to the command history.

Parameters:

command - the command to execute

Throws:

CollectionKeyException - if there is an error with the collection key

WrongArgumentException - if there is an error with the command arguments

CustomIOException - if there is an input/output error while executing the command

executeAndReturn

public <T> T executeAndReturn(AbstractCommandWithResult<T> command)
                       throws WrongArgumentException,
CollectionKeyException,
CustomIOException

Executes the specified command with a result and adds it to the command history.

Type Parameters:

T - the type of the command result

Parameters:

command - the command to execute

Returns:

the result of the executed command

Throws:

WrongArgumentException - if there is an error with the command arguments

CollectionKeyException - if there is an error with the collection key

CustomIOException - if there is an input/output error while executing the command

getCommandHistory

public Stack<AbstractCommand> getCommandHistory()

Returns the command history maintained by the invoker.

Returns:

the command history stack