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Jason is a fully-fledged interpreter for an extended version of AgentSpeak, a BDI agent-oriented logic programming language.
package jason.stdlib;
import jason.asSemantics.DefaultInternalAction;
import jason.asSemantics.InternalAction;
import jason.asSemantics.TransitionSystem;
import jason.asSemantics.Unifier;
import jason.asSyntax.Term;
/**
Internal action: .number.
Description: checks whether the argument is a number.
Parameter:
- + argument (any term): the term to be checked.
Examples:
-
.number(10): true.
-
.number(10.34): true.
-
.number(b(10)): false.
-
.number("home page"): false.
-
.number(X): false if X is free, true if X is bound to a number.
@see jason.stdlib.atom
@see jason.stdlib.list
@see jason.stdlib.literal
@see jason.stdlib.string
@see jason.stdlib.structure
@see jason.stdlib.ground
*/
public class number extends DefaultInternalAction {
private static InternalAction singleton = null;
public static InternalAction create() {
if (singleton == null)
singleton = new number();
return singleton;
}
@Override public int getMinArgs() {
return 1;
}
@Override public int getMaxArgs() {
return 1;
}
@Override
public Object execute(TransitionSystem ts, Unifier un, Term[] args) throws Exception {
checkArguments(args);
return args[0].isNumeric();
}
}