org.crsh.shell.impl.command.spi
Class CommandInvoker<C,P>

java.lang.Object
  org.crsh.shell.impl.command.spi.CommandInvoker<C,P>

Type Parameters:

C - the consumed element generic type

P - the produced element generic type

All Implemented Interfaces:

Consumer<C>, Filter<C,P,CommandContext<? super P>>, Producer<P,CommandContext<? super P>>

Direct Known Subclasses:

ClosureInvoker, PipeLine

public abstract class CommandInvoker<C,P>
extends Object
implements Filter<C,P,CommandContext<? super P>>

A command invoker is a filter for a CommandContext kind of consumer.

Constructor Summary

CommandInvoker()

Method Summary

abstract void	close() Close the producer.
abstract void	flush() Flush the stream.
KeyHandler	getKeyHandler() Return the key handler or null if the invoker cannot handler key events.
ScreenContext	getScreenContext() Provide an opportunity for the command to implement screen context.
void	invoke(CommandContext<? super P> consumer) Invoke the command.
abstract void	open(CommandContext<? super P> consumer) Open the producer with the specified consumer.
abstract void	provide(C element) Provide an element.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.crsh.stream.Consumer

getConsumedType

Methods inherited from interface org.crsh.stream.Producer

getProducedType

Constructor Detail

CommandInvoker

public CommandInvoker()

Method Detail

invoke

public final void invoke(CommandContext<? super P> consumer)
                  throws IOException,
                         CommandException

Invoke the command.

Parameters:

consumer - the consumer for this invocation

Throws:

IOException - any io exception

CommandException - anything command exception

flush

public abstract void flush()
                    throws IOException

Description copied from interface: Consumer

Flush the stream.

Specified by:

flush in interface Consumer<C>

Throws:

IOException - any io exception

provide

public abstract void provide(C element)
                      throws IOException,
                             CommandException

Description copied from interface: Consumer

Provide an element.

Specified by:

provide in interface Consumer<C>

Parameters:

element - the provided element

Throws:

IOException

CommandException

open

public abstract void open(CommandContext<? super P> consumer)
                   throws IOException,
                          CommandException

Description copied from interface: Producer

Open the producer with the specified consumer.

Specified by:

open in interface Producer<P,CommandContext<? super P>>

Parameters:

consumer - the consumer

Throws:

IOException

CommandException

close

public abstract void close()
                    throws IOException,
                           CommandException

Description copied from interface: Producer

Close the producer.

Specified by:

close in interface Producer<P,CommandContext<? super P>>

Throws:

IOException

CommandException

getScreenContext

public ScreenContext getScreenContext()

Provide an opportunity for the command to implement screen context.

Returns:

the screen context

getKeyHandler

public KeyHandler getKeyHandler()

Return the key handler or null if the invoker cannot handler key events.

Returns:

the key handler