Package jason.stdlib
Class foreach
java.lang.Object
jason.asSemantics.DefaultInternalAction
jason.stdlib.foreach
- All Implemented Interfaces:
InternalAction
,java.io.Serializable
@Manual(literal="for (formula) { plan_body }", hint="for all unifications of logical formula, the plan_body is executed", argsHint="the formula that when true makes the plan_body be executed", argsType="logical formula", examples={"for ( vl(X) ) { .print(X); }: print all values of X","for ( .member(X,[a,b,c]) ) { .print(X); }: print all members of the list","for ( .range(I,1,10) ) { .print(I); }: print all values from 1 to 10"}, seeAlso="") public class foreach extends DefaultInternalAction
Internal action: .for(formula) { plan_body }
.
Description: Implementation of for. For all unifications of logical formula, the plan_body is executed.
Syntax:
for ( logical formula ) { plan_body }
Parameters:
- + formula (logical formula): the formula that when true makes the plan_body be executed.
Example:
+event : context <- .... for ( vl(X) ) { .print(X); // print all values of X } for ( .member(X,[a,b,c]) ) { .print(X); // print all members of the list } for ( .range(I,1,10) ) { .print(I); // print all values from 1 to 10 } ....The unification resulted from the evaluation of the logical formula is used only inside the loop, i.e., the unification after the for is the same as before.
- See Also:
while
, 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 foreach()
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Method Summary
Modifier and Type Method Description protected void
checkArguments(Term[] args)
static InternalAction
create()
java.lang.Object
execute(TransitionSystem ts, Unifier un, Term[] args)
Executes the internal action.int
getMaxArgs()
int
getMinArgs()
Term[]
prepareArguments(Literal body, Unifier un)
Prepare body's terms to be used in 'execute', normally it consist of cloning and applying each termMethods inherited from class jason.asSemantics.DefaultInternalAction
canBeUsedInContext, destroy, 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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foreach
public foreach()
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Method Details
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create
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prepareArguments
Description copied from interface:InternalAction
Prepare body's terms to be used in 'execute', normally it consist of cloning and applying each term- Specified by:
prepareArguments
in interfaceInternalAction
- Overrides:
prepareArguments
in classDefaultInternalAction
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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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checkArguments
- Overrides:
checkArguments
in classDefaultInternalAction
- Throws:
JasonException
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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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