Esempio n. 1
0
  @Override
  public boolean indexAccessible(final IndexInfo ii) throws QueryException {
    final int es = exprs.length;
    final boolean[] ng = new boolean[es];
    int costs = 0;
    for (final FTExpr expr : exprs) {
      if (!expr.indexAccessible(ii)) return false;
      // use worst costs for estimation, as all index results may need to be scanned
      if (costs < ii.costs) costs = ii.costs;
    }

    ii.costs = costs;
    negated = ng;
    return true;
  }
Esempio n. 2
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 @Override
 public FTExpr compile(final CompileContext cc) throws QueryException {
   super.compile(cc);
   boolean not = true;
   for (final FTExpr expr : exprs) not &= expr instanceof FTNot;
   if (not) {
     // convert (!A and !B and ...) to !(A or B or ...)
     final int es = exprs.length;
     for (int e = 0; e < es; ++e) exprs[e] = exprs[e].exprs[0];
     return new FTNot(info, new FTOr(info, exprs));
   }
   return this;
 }
Esempio n. 3
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 @Override
 public boolean has(final Flag flag) {
   for (final FTExpr e : exprs) if (e.has(flag)) return true;
   return false;
 }
Esempio n. 4
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 /**
  * Checks if sub expressions of a mild not operator violate the grammar.
  *
  * @return result of check
  */
 boolean usesExclude() {
   for (final FTExpr e : exprs) if (e.usesExclude()) return true;
   return false;
 }