Package jason.stdlib

Class df_search

java.lang.Object

jason.asSemantics.DefaultInternalAction

jason.stdlib.df_register

jason.stdlib.df_search

All Implemented Interfaces:

InternalAction, Serializable

@Manual(literal=".df_search(service[,type],result)",
        hint="list of all agents providing the service and, optionally, the type",
        argsHint={"the service the agents are registered","the type of the service [optional]","the resulting list of agents providing the service"},
        argsType={"literal","string","list"},
        examples=".df_search(\"sell(book)\",L): unifies L with [bob,alice] in case these two agents have registered as book sellers",
        seeAlso={"jason.stdlib.df_register","jason.stdlib.df_deregister","jason.stdlib.df_subscribe"})
public class df_search
extends df_register

Internal action: .df_search(S [,T] , L).

Description: unifies in L a list of all agents providing the service S of type T (see FIPA Directory Facilitator specification). An optional second argument can be used to define the type of the service.

Parameters:

• - service (literal): the service the agents are registered.
• - type (string -- optional): the type of the service.
• - type (list): the resultant list of agents providing the service.

Examples:

• .df_search("sell(book)",L): unifies L with [bob,alice] in case these two agents have registered as book sellers.

See Also:

• df_register
• df_deregister
• df_subscribe
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
df_search()

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_search

public df_search()

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