How to use

values

method

in

org.apache.asterix.om.types.ATypeTag

@Override
public IScalarEvaluatorFactory[] next() {
  IScalarEvaluatorFactory[] scalarEvaluatorFactories = new IScalarEvaluatorFactory[argSize];
  for (int j = 0; j < argSize; ++j) {
    int base = (int) Math.pow(ATypeTag.values().length, j);
    // Enumerates through all possible type tags.
    byte serializedTypeTag = (byte) ((index / base) % ATypeTag.values().length);
    scalarEvaluatorFactories[j] = new ConstantEvalFactory(new byte[] { serializedTypeTag });
  }
  ++index;
  return scalarEvaluatorFactories;
}

private Iterator<IScalarEvaluatorFactory[]> getArgCombinations(final int inputArity) {
  final int argSize = inputArity >= 0 ? inputArity : 3;
  final int numCombinations = (int) Math.pow(ATypeTag.values().length, argSize);
  return new Iterator<IScalarEvaluatorFactory[]>() {
    private int index = 0;
    @Override
    public boolean hasNext() {
      return index < numCombinations;
    }
    @Override
    public IScalarEvaluatorFactory[] next() {
      IScalarEvaluatorFactory[] scalarEvaluatorFactories = new IScalarEvaluatorFactory[argSize];
      for (int j = 0; j < argSize; ++j) {
        int base = (int) Math.pow(ATypeTag.values().length, j);
        // Enumerates through all possible type tags.
        byte serializedTypeTag = (byte) ((index / base) % ATypeTag.values().length);
        scalarEvaluatorFactories[j] = new ConstantEvalFactory(new byte[] { serializedTypeTag });
      }
      ++index;
      return scalarEvaluatorFactories;
    }
  };
}

@Override
public void readFromFuncArgs(List<Mutable<ILogicalExpression>> funcArgs) {
  super.readFromFuncArgs(funcArgs);
  int index = super.getNumParams();
  // Read search modifier type.
  int searchModifierOrdinal = AccessMethodUtils.getInt32Constant(funcArgs.get(index + SEARCH_MODIFIER_INDEX));
  searchModifierType = SearchModifierType.values()[searchModifierOrdinal];
  // Read similarity threshold. Concrete type depends on search modifier.
  similarityThreshold = ((ConstantExpression) funcArgs.get(index + SIM_THRESHOLD_INDEX).getValue()).getValue();
  // Read type of search key.
  int typeTagOrdinal = AccessMethodUtils.getInt32Constant(funcArgs.get(index + SEARCH_KEY_TYPE_INDEX));
  searchKeyType = ATypeTag.values()[typeTagOrdinal];
  // Read full-text search information.
  isFullTextSearchQuery = AccessMethodUtils.getBooleanConstant(funcArgs.get(index + IS_FULLTEXT_SEARCH_INDEX));
  // Read key var list.
  keyVarList = new ArrayList<>();
  readVarList(funcArgs, index + KEY_VAR_INDEX, keyVarList);
  // TODO: We could possibly simplify things if we did read the non-key var list here.
  // We don't need to read the non-key var list.
  nonKeyVarList = null;
}