/**
* Deletes a node and its descendants.
*
* @param pre pre value of the node to delete
*/
public final void delete(final int pre) {
meta.update();
// size of the subtree to delete
int k = kind(pre);
final int s = size(pre, k);
resources.delete(pre, s);
if (meta.updindex) {
// delete child records from indexes
indexDelete(pre, s);
}
/// explicitly delete text or attribute value
if (k != DOC && k != ELEM) delete(pre, k != ATTR);
// reduce size of ancestors
int par = pre;
// check if we are an attribute (different size counters)
if (k == ATTR) {
par = parent(par, ATTR);
attSize(par, ELEM, attSize(par, ELEM) - 1);
size(par, ELEM, size(par, ELEM) - 1);
k = kind(par);
}
// reduce size of ancestors
while (par > 0 && k != DOC) {
par = parent(par, k);
k = kind(par);
size(par, k, size(par, k) - s);
}
// preserve empty root node
if (kind(pre) == DOC) --meta.ndocs;
if (meta.updindex) {
// delete node and descendants from ID -> PRE map:
idmap.delete(pre, id(pre), -s);
}
// delete node from table structure and reduce document size
table.delete(pre, s);
if (!cache) updateDist(pre, -s);
// propagate PRE value shifts to namespaces
nspaces.delete(pre, s, this);
}
