Package jason.stdlib
Class empty
java.lang.Object
jason.asSemantics.DefaultInternalAction
jason.stdlib.empty
- All Implemented Interfaces:
InternalAction
,java.io.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:
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.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:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description private static InternalAction
singleton
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Constructor Summary
Constructors Constructor Description empty()
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Method Summary
Modifier and Type Method Description static InternalAction
create()
java.lang.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
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Field Details
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singleton
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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
public java.lang.Object execute(TransitionSystem ts, Unifier un, Term[] args) throws java.lang.ExceptionDescription 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:
java.lang.Exception
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