Package jason.stdlib

Class current_intention

java.lang.Object

jason.asSemantics.DefaultInternalAction

jason.stdlib.current_intention

All Implemented Interfaces:

InternalAction, Serializable

@Manual(literal=".current_intention(description)",
        hint="returns a description of the current intention",
        argsHint="the variable that unifies with the intention description",
        argsType="structure",
        examples=".current_intention(X): X unifies with the description of the current intention",
        seeAlso={"jason.stdlib.intend","jason.stdlib.desire","jason.stdlib.intention","jason.stdlib.drop_all_desires","jason.stdlib.drop_all_events","jason.stdlib.drop_all_intentions","jason.stdlib.drop_event","jason.stdlib.drop_intention","jason.stdlib.drop_desire","jason.stdlib.succeed_goal","jason.stdlib.fail_goal","jason.stdlib.resume","jason.stdlib.suspend","jason.stdlib.suspended"})
public class current_intention
extends DefaultInternalAction

Internal action: .current_intention.

Description: returns a description of the current intention. It is useful for plans that need to inspect the current intention. The description of the intention has the following form:

intention(id,stack of intended means)

where each intended means has the form:

im(plan label,trigger event,plan body term, unification function (a list of maps))

For example:

intention(1,
[
im(l__6[source(self)], {+!g3}, { .current_intention(I); .print(end) }, [map(I, ....)]),
im(l__5[source(self)], {+!g5(10)}, { !g3; .fail }, []),
im(l__4[source(self)], {+!start}, { !g5(X); .print(endg4) }, [map(X, test)]),
...
])

Parameters:

• - intention (structure): the variable that unifies with the intention description.

Example:

• .current_intention(X): X unifies with the description of the current intention (i.e. the intention that executed this internal action).

Notes:

• The internal action .intention(ID,State,Stack,current) can be used in place of .current_intention.
• In case this internal action is used in the body of a plan, the intention that are executing the plan is used.
• In case this internal action is used in the context of a plan, the intention that produced the event is used.

See Also:

• intend
• desire
• intention
• drop_all_desires
• drop_all_events
• drop_all_intentions
• drop_intention
• drop_desire
• succeed_goal
• fail_goal
• suspend
• suspended
• resume
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
current_intention()

Method Summary

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

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

current_intention

public current_intention()

Method Details

getMinArgs

public int getMinArgs()

Overrides:

getMinArgs in class DefaultInternalAction

getMaxArgs

public int getMaxArgs()

Overrides:

getMaxArgs in class DefaultInternalAction

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 DefaultInternalAction

Throws:

Exception