Package jason.functions

Class Count

java.lang.Object

jason.asSemantics.DefaultArithFunction

jason.functions.Count

All Implemented Interfaces:

ArithFunction, Serializable

public class Count
extends DefaultArithFunction

Function: .count(B): counts the number of occurrences of a particular belief (pattern) in the agent's belief base, as the internal action .count.

Example:

• .count(a(2,_)): returns the number of beliefs that unify with a(2,_).

See Also:

• internal action version
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Count()

Method Summary

Modifier and Type	Method	Description
boolean	allowUngroundTerms()	returns true if the arguments of the function can be unground (as in .count)
boolean	checkArity(int a)	returns true if a is a good number of arguments for the function
double	evaluate(TransitionSystem ts, Term[] args)	evaluates/computes the function based on the args
String	getName()	returns the name of the function

Methods inherited from class jason.asSemantics.DefaultArithFunction

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

Count

public Count()

Method Details

getName

public String getName()

Description copied from interface: ArithFunction

returns the name of the function

Specified by:

getName in interface ArithFunction

Overrides:

getName in class DefaultArithFunction

evaluate

public double evaluate(TransitionSystem ts,
 Term[] args)
                throws Exception

Description copied from interface: ArithFunction

evaluates/computes the function based on the args

Specified by:

evaluate in interface ArithFunction

Overrides:

evaluate in class DefaultArithFunction

Throws:

Exception

checkArity

public boolean checkArity(int a)

Description copied from interface: ArithFunction

returns true if a is a good number of arguments for the function

Specified by:

checkArity in interface ArithFunction

Overrides:

checkArity in class DefaultArithFunction

allowUngroundTerms

public boolean allowUngroundTerms()

Description copied from interface: ArithFunction

returns true if the arguments of the function can be unground (as in .count)

Specified by:

allowUngroundTerms in interface ArithFunction

Overrides:

allowUngroundTerms in class DefaultArithFunction