package jp.ac.kobe_u.cs.prolog.builtin;
import jp.ac.kobe_u.cs.prolog.lang.IllegalTypeException;
import jp.ac.kobe_u.cs.prolog.lang.JavaObjectTerm;
import jp.ac.kobe_u.cs.prolog.lang.OutOfScope;
import jp.ac.kobe_u.cs.prolog.lang.Predicate;
import jp.ac.kobe_u.cs.prolog.lang.Prolog;
import jp.ac.kobe_u.cs.prolog.lang.SystemException;
import jp.ac.kobe_u.cs.prolog.lang.Term;
/**
* <code>'$end_exception'/1<code><br>
*
* @author Mutsunori Banbara (banbara@kobe-u.ac.jp)
* @author Naoyuki Tamura (tamura@kobe-u.ac.jp)
* @version 1.0
*/
class PRED_$end_exception_1 extends Predicate {
/**
*
*/
private static final long serialVersionUID = 3593594865830516422L;
Term arg1;
public PRED_$end_exception_1(Term a1, Predicate cont) {
arg1 = a1;
this.cont = cont;
}
public PRED_$end_exception_1() {
}
@Override
public void setArgument(Term[] args, Predicate cont) {
arg1 = args[0];
this.cont = cont;
}
@Override
public int arity() {
return 1;
}
@Override
public String toString() {
return "$end_exception(" + arg1 + ")";
}
@Override
public Predicate exec(Prolog engine) {
engine.setB0();
Term a1;
a1 = arg1;
a1 = a1.dereference();
if (!a1.isJavaObject()) {
throw new IllegalTypeException(this, 1, "java", a1);
}
Object obj = ((JavaObjectTerm) a1).object();
if (!(obj instanceof PRED_$begin_exception_1)) {
throw new SystemException(
"a1 must be an object of PRED_$begin_exception_1: "
+ this.toString());
}
PRED_$begin_exception_1 p = (PRED_$begin_exception_1) obj;
p.outOfScope = true;
engine.trail.add(new OutOfScope(p));
return cont;
}
}