Package jason.stdlib

Class df_subscribe

java.lang.Object

jason.asSemantics.DefaultInternalAction

jason.stdlib.df_register

jason.stdlib.df_subscribe

All Implemented Interfaces:

InternalAction, Serializable

@Manual(literal=".df_subscribe(service[,type])",
        hint="subscribes the agent as interested in providers of referred service and, optionally, a type",
        argsHint={"the service the agents is interested in","the type of the service [optional]"},
        argsType={"literal","string"},
        examples=".df_subscribe(\"sell(book)\"): subscribe the agent for providers of agents that sell books",
        seeAlso={"jason.stdlib.df_register","jason.stdlib.df_deregister","jason.stdlib.df_search"})
public class df_subscribe
extends df_register

Internal action: .df_subscribe(S [,T]).

Description: subscribes the agent as interested in providers of service S of type T. For each new agent providing this service, the agent will receive a message invalid input: '<'tell provider(Ag,Service)>.

Parameters:

• - service (literal): the service the agents is interested in.
• - type (string -- optional): the type of the service.

Examples:

• .df_subscribe("sell(book)"): subscribe the agent for providers of agents that sell books.

See Also:

• df_register
• df_deregister
• df_search
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
df_subscribe()

Method Summary

Modifier and Type	Method	Description
static InternalAction	create()
Object	execute(TransitionSystem ts, Unifier un, Term[] args)	Executes the internal action.
int	getMaxArgs()
int	getMinArgs()

Methods inherited from class jason.stdlib.df_register

getService, getType

Methods inherited from class jason.asSemantics.DefaultInternalAction

canBeUsedInContext, checkArguments, destroy, prepareArguments, suspendIntention

Methods inherited from class java.lang.Object

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

Constructor Details

df_subscribe

public df_subscribe()

Method Details

create

public static InternalAction create()

getMinArgs

public int getMinArgs()

Overrides:

getMinArgs in class df_register

getMaxArgs

public int getMaxArgs()

Overrides:

getMaxArgs in class df_register

execute

public Object execute(TransitionSystem ts,
 Unifier un,
 Term[] args)
               throws Exception

Description copied from interface: InternalAction

Executes the internal action. It should return a Boolean or an Iterator. A true boolean return means that the IA was successfully executed. An Iterator result means that there is more than one answer for this IA (e.g. see member internal action).

Specified by:

execute in interface InternalAction

Overrides:

execute in class df_register

Throws:

Exception