Method delete

basex-core/src/main/java/org/basex/data/Data.java:672–712

Deletes a node and its descendants. @param pre PRE value of the node to be deleted

(final int pre)

   * @param pre PRE value of the node to be deleted
   */
  public final void delete(final int pre) {
    meta.update();

    // delete references in document index
    int kind = kind(pre);
    final int size = size(pre, kind);

    // delete entries in value indexes
    indexDelete(pre, id(pre), size);

    /// delete textual values
    if(kind != DOC && kind != ELEM) delete(pre, kind != ATTR);

    // reduce size of ancestors
    int par = pre;
    // check if we are an attribute (different size counters)
    if(kind == ATTR) {
      par = parent(par, ATTR);
      attSize(par, ELEM, attSize(par, ELEM) - 1);
      size(par, ELEM, size(par, ELEM) - 1);
      kind = kind(par);
    }

    // delete namespace nodes and propagate PRE value shifts (before node sizes are touched!)
    nspaces.delete(pre, size, this);

    // reduce size of ancestors
    while(par > 0 && kind != DOC) {
      par = parent(par, kind);
      kind = kind(par);
      size(par, kind, size(par, kind) - size);
    }

    // preserve empty root node
    if(kind(pre) == DOC) --meta.ndocs;

    // delete node from table structure and reduce document size
    table.delete(pre, size);

    updateDist(pre, -size);
  }

  /**
   * Inserts standalone attributes (without root element).