com.ibm.portal.model.command
Interface CommandFactory

All Superinterfaces:

java.lang.Iterable<java.lang.Class<? extends Command>>, IterableListModel<java.lang.Class<? extends Command>>, ListModel<java.lang.Class<? extends Command>>

public interface CommandFactory
extends IterableListModel<java.lang.Class<? extends Command>>

Factory object used to create Command objects. Clients need to provide an implementation of the CommandContext to access a command. There exist default implementations of these contexts for the common case in the helper package. The IterableListModel allows to iterate over the Class objects of the supported commands.

Since:

8.0

See Also:

CommandFactoryHome

Note:

This interface is designed to be implemented by clients.

Method Summary

<T extends Command> T

createCommand(CommandContext<T> ctx) Creates a new command in the given context.

Methods inherited from interface com.ibm.portal.IterableListModel

iterator

Method Detail

createCommand

<T extends Command> T createCommand(CommandContext<T> ctx)
                                throws ModelException

Creates a new command in the given context. The Command must be disposed via Disposable.dispose() when no longer used.

Type Parameters:

T - type of the command

Parameters:

ctx - the creation context

Returns:

the command, not null

Throws:

ModelException - if the command cannot be instantiated