Package jason.stdlib
Class empty
java.lang.Object
jason.asSemantics.DefaultInternalAction
jason.stdlib.empty
- All Implemented Interfaces:
InternalAction
,Serializable
@Manual(literal=".empty(argument)",
hint="checks whether the argument does not have any term",
argsHint="the term whose length is to be determined",
argsType="string or list",
examples={".empty([]): true",".empty([a,b]): false, the list has at least one term",".empty(\"a\"): false, the argument has at least one term"},
seeAlso="")
public class empty
extends DefaultInternalAction
Internal action: .empty
.
Description: checks whether the argument does not have any term.
Parameters:
- + argument (string or list): the term whose length is to be determined.
Examples:
-
.empty([])
: true. -
.empty([a,b])
: false, the list has at least one term. -
.empty("a")
: false, the argument has at least one term.
- See Also:
-
Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionstatic InternalAction
create()
execute
(TransitionSystem ts, Unifier un, Term[] args) Executes the internal action.int
int
Methods inherited from class jason.asSemantics.DefaultInternalAction
canBeUsedInContext, checkArguments, destroy, prepareArguments, suspendIntention
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Constructor Details
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empty
public empty()
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Method Details
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create
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getMinArgs
public int getMinArgs()- Overrides:
getMinArgs
in classDefaultInternalAction
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getMaxArgs
public int getMaxArgs()- Overrides:
getMaxArgs
in classDefaultInternalAction
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execute
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 interfaceInternalAction
- Overrides:
execute
in classDefaultInternalAction
- Throws:
Exception
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