Method add

basex-core/src/main/java/org/basex/query/expr/path/Step.java:321–333

Adds path nodes to the list if they comply with the given test conditions. @param node root node @param nodes output nodes @param name name ID, or 0 as wildcard @param kind node kind, or -1 for all types

(final PathNode node, final ArrayList<PathNode> nodes, final int name,
      final int kind)

   * @param kind node kind, or {@code -1} for all types
   */
  private void add(final PathNode node, final ArrayList<PathNode> nodes, final int name,
      final int kind) {

    for(final PathNode pn : node.children) {
      if(axis.oneOf(DESCENDANT, DESCENDANT_OR_SELF)) {
        add(pn, nodes, name, kind);
      }
      if(kind == -1 && pn.kind != Data.ATTR ^ axis == ATTRIBUTE ||
         kind == pn.kind && (name == 0 || name == pn.name)) {
        if(!nodes.contains(pn)) nodes.add(pn);
      }
    }
  }

  /**
   * Checks if the step will never yield results.