예제 #1
0
 @Override
 public Item item(final QueryContext ctx, final InputInfo ii) throws QueryException {
   switch (def) {
     case ENVAR:
       final String e = System.getenv(Token.string(checkEStr(expr[0], ctx)));
       return e != null ? Str.get(e) : null;
     default:
       return super.item(ctx, ii);
   }
 }
예제 #2
0
  @Override
  public Iter iter(final QueryContext ctx) throws QueryException {
    switch (def) {
      case ERROR:
        final int al = expr.length;
        if (al == 0) FUNERR1.thrw(input);

        String code = FUNERR1.code();
        String msg = FUNERR1.desc;

        final Item it = expr[0].item(ctx, input);
        if (it == null) {
          if (al == 1) XPEMPTY.thrw(input, desc());
        } else {
          code = Token.string(((QNm) checkType(it, AtomType.QNM)).ln());
        }
        if (al > 1) msg = Token.string(checkEStr(expr[1], ctx));
        final Value val = al > 2 ? expr[2].value(ctx) : null;
        final QueryException ex = new QueryException(input, code, val, msg);
        throw ex;
      case TRACE:
        return new Iter() {
          final Iter ir = expr[0].iter(ctx);
          final byte[] s = checkEStr(expr[1], ctx);

          @Override
          public Item next() throws QueryException {
            final Item i = ir.next();
            if (i != null) {
              final TokenBuilder tb = new TokenBuilder(s);
              if (s.length != 0) tb.add(": ");
              tb.add(i.toString());
              // if GUI is used, or if user is no admin, trace info is cached
              if (Prop.gui || !ctx.context.user.perm(User.ADMIN)) {
                ctx.evalInfo(tb.finish());
              } else {
                Util.errln(tb);
              }
            }
            return i;
          }
        };
      case ENVARS:
        final ItemCache ic = new ItemCache();
        for (final Object k : System.getenv().keySet().toArray()) {
          ic.add(Str.get(k));
        }
        return ic;
      default:
        return super.iter(ctx);
    }
  }