package jp.ac.kobe_u.cs.prolog.builtin;
import jp.ac.kobe_u.cs.prolog.lang.ExistenceException;
import jp.ac.kobe_u.cs.prolog.lang.HashMapOfTerm;
import jp.ac.kobe_u.cs.prolog.lang.IllegalDomainException;
import jp.ac.kobe_u.cs.prolog.lang.InternalException;
import jp.ac.kobe_u.cs.prolog.lang.JavaObjectTerm;
import jp.ac.kobe_u.cs.prolog.lang.PInstantiationException;
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.Term;
/**
* <code>hash_put/3</code><br>
*
* @author Mutsunori Banbara (banbara@kobe-u.ac.jp)
* @author Naoyuki Tamura (tamura@kobe-u.ac.jp)
* @version 1.0
*/
public class PRED_hash_put_3 extends Predicate {
/**
*
*/
private static final long serialVersionUID = 3426581922201842374L;
private Term arg1, arg2, arg3;
public PRED_hash_put_3(Term a1, Term a2, Term a3, Predicate cont) {
arg1 = a1;
arg2 = a2;
arg3 = a3;
this.cont = cont;
}
public PRED_hash_put_3() {
}
@Override
public void setArgument(Term[] args, Predicate cont) {
arg1 = args[0];
arg2 = args[1];
arg3 = args[2];
this.cont = cont;
}
@Override
public int arity() {
return 3;
}
@Override
public String toString() {
return "hash_put(" + arg1 + "," + arg2 + "," + arg3 + ")";
}
@Override
public Predicate exec(Prolog engine) {
engine.setB0();
Term a1, a2, a3;
a1 = arg1;
a2 = arg2;
a3 = arg3;
Object hash = null;
a1 = a1.dereference();
if (a1.isVariable()) {
throw new PInstantiationException(this, 1);
} else if (a1.isSymbol()) {
if (!engine.getHashManager().containsKey(a1)) {
throw new ExistenceException(this, 1, "hash", a1, "");
}
hash = ((JavaObjectTerm) engine.getHashManager().get(a1)).object();
} else if (a1.isJavaObject()) {
hash = ((JavaObjectTerm) a1).object();
} else {
throw new IllegalDomainException(this, 1, "hash_or_alias", a1);
}
if (!(hash instanceof HashMapOfTerm)) {
throw new InternalException(this + ": Hash is not HashtableOfTerm");
}
a2 = a2.dereference();
a3 = a3.dereference();
((HashMapOfTerm) hash).put(a2, a3);
return cont;
}
}