Package jason.stdlib
Class ground
java.lang.Object
jason.asSemantics.DefaultInternalAction
jason.stdlib.ground
- All Implemented Interfaces:
InternalAction
,java.io.Serializable
@Manual(literal=".ground(term)", hint="checks whether the argument is ground, i.e., it has no free variables", argsHint="the term to be checked", argsType="term", examples={".ground(b(10)): true",".ground(10): true",".ground(X): false if X is free or bound to a term with free variables",".ground(a(X)): false if X is free or bound to a term with free variables",".ground([a,b,c]): true",".ground([a,b,c(X)]): false if X is free or bound to a term with free variables"}, seeAlso={"jason.stdlib.atom","jason.stdlib.list","jason.stdlib.literal","jason.stdlib.number","jason.stdlib.string","jason.stdlib.structure","jason.stdlib.ground"}) public class ground extends DefaultInternalAction
Internal action: .ground
.
Description: checks whether the argument is ground, i.e., it has no free variables. Numbers, Strings, and Atoms are always ground.
Parameters:
- + argument (any term): the term to be checked.
Examples:
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.ground(b(10))
: true. -
.ground(10)
: true. -
.ground(X)
: false if X is free or bound to a term with free variables. -
.ground(a(X))
: false if X is free or bound to a term with free variables. -
.ground([a,b,c])
: true. -
.ground([a,b,c(X)])
: false if X is free or bound to a term with free variables.
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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 ground()
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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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ground
public ground()
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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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