org.apache.geronimo.gshell.command
Class CommandSupport

java.lang.Object
  org.apache.geronimo.gshell.command.CommandSupport

All Implemented Interfaces:

Command

Direct Known Subclasses:

CatCommand, EchoCommand, ExecuteCommand, ExitCommand, HelpCommand, JavaCommand, RshCommand, RshServerCommand, SetCommand, SleepCommand, SourceCommand, UnsetCommand, WaitCommand

public abstract class CommandSupport
extends Object
implements Command

Provides support for Command implemenations.

Version:

$Rev: 574416 $ $Date: 2007-09-10 17:49:15 -0700 (Mon, 10 Sep 2007) $

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.geronimo.gshell.command.Command

Command.Result

Field Summary

protected CommandContext	context
protected IO	io
protected org.slf4j.Logger	log
protected Variables	variables

Fields inherited from interface org.apache.geronimo.gshell.command.Command

FAILURE, SUCCESS

Constructor Summary

CommandSupport()

Method Summary

protected void	displayHelp(CommandLineProcessor clp)
protected abstract Object	doExecute()
Object	execute(Object... args) Execute the commands behavior.
void	init(CommandContext context) Initialize the command with its execution context.

Methods inherited from class java.lang.Object

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

Field Detail

log

protected org.slf4j.Logger log

context

protected CommandContext context

io

protected IO io

variables

protected Variables variables

Constructor Detail

CommandSupport

public CommandSupport()

Method Detail

init

public void init(CommandContext context)

Description copied from interface: Command

Initialize the command with its execution context.

Specified by:

init in interface Command

execute

public Object execute(Object... args)
               throws Exception

Description copied from interface: Command

Execute the commands behavior.

Specified by:

execute in interface Command

Throws:

Exception

doExecute

protected abstract Object doExecute()
                             throws Exception

Throws:

Exception

displayHelp

protected void displayHelp(CommandLineProcessor clp)