/** Node visitor */ public void visit(SafraTree tree, SafraTreeNode node) { BitSet new_labeling = new BitSet(); BitSet old_labeling = node.getLabeling(); for (int i = old_labeling.nextSetBit(0); i != -1; i = old_labeling.nextSetBit(i + 1)) { new_labeling.Union(_nba[i].getEdge(_elem));//////////////generate new label. } node.getLabeling().Assign(new_labeling); }
/** */ public void visit(SafraTree tree, SafraTreeNode node) { if (_final_states.intersects(node.getLabeling()))//////////if this node has the state in accepting states of NBA { BitSet q_and_f = new BitSet(_final_states); q_and_f.Intersect(node.getLabeling());////////////////get the intersect of the label and the accepting states SafraTreeNode new_child = tree.newNode(); node.addAsYoungestChild(new_child); _tree_template.setRenameable(new_child.getID()); new_child.getLabeling().Assign(q_and_f); } }
/** Node visitor */ public void visit(SafraTree tree, SafraTreeNode node) { bool all_final = true; //for (BitSetIterator it=BitSetIterator(node->getLabeling());it!=BitSetIterator::end(node->getLabeling());++it) //BitSet label_this = node.getLabeling(); //for (int it = 0; it < label_this.Count; it++) for (int it = BitSetIterator.start(node.getLabeling()); it != BitSetIterator.end(node.getLabeling()); it = BitSetIterator.increment(node.getLabeling(), it)) { //// if (!_nba_states_with_all_succ_final.get(*it)) { if (!_nba_states_with_all_succ_final.get(it)) { all_final = false; break; } } if (all_final) { // remove all children of node & set final flag STVisitor_remove_subtree stv_remove = new STVisitor_remove_subtree(_tree_template); tree.walkChildrenPostOrder(stv_remove, node); node.setFinalFlag(); _success = true; } }
/** Node visitor */ public void visit(SafraTree tree, SafraTreeNode node) { if (node.getChildCount() == 0) { return; } BitSet labeling_union = new BitSet(); //for (SafraTreeNode::child_iterator it=node->children_begin();it!=node->children_end();++it) SafraTreeNode it = node.children_begin(); while (it != node.children_end()) { labeling_union.Union(it.getLabeling()); it = it.increment(); } if (labeling_union == node.getLabeling()) { // The union of the labelings of the children is exactly the // same as the labeling of the parent -> // remove children STVisitor_remove_subtree stv_remove = new STVisitor_remove_subtree(_tree_template); tree.walkChildrenPostOrder(stv_remove, node); node.setFinalFlag(true);///////////should be "+ i", means in Li } }
/** Node visitor */ public void visit(SafraTree tree, SafraTreeNode node) { if (node.getChildCount() <= 1) { return; } BitSet already_seen = new BitSet(); bool first = true; //for (SafraTreeNode::child_iterator it=node->children_begin();it!=node->children_end();++it) SafraTreeNode it = node.children_begin(); while (it != node.children_end()) { SafraTreeNode cur_child = it; if (first) { already_seen = new BitSet(cur_child.getLabeling()); ////////////get the NBA states in child first = false; it = it.increment(); ////////note added } else { BitSet current = new BitSet(cur_child.getLabeling()); BitSet intersection = new BitSet(already_seen); // make copy if (intersection.intersects(current)) { // There are some labels, which occur in older brothers, // remove them from current node and its children STVisitor_subtract_labeling stv_sub = new STVisitor_subtract_labeling(intersection); tree.walkSubTreePostOrder(stv_sub, cur_child); } already_seen.Union(current); it = it.increment(); } } }
/** * Compare two subtrees to see if they match (taking into account the renameableNames * and the restrictedNames). */ public bool matches(SafraTreeNode this_node, SafraTreeNode other_node) { Debug.Assert(this_node != null && other_node != null); if (this_node == null || other_node == null) { return(false); } if (!renameableNames().get(this_node.getID())) { // this is not a new node, so we require a perfect match.. if (other_node.getID() != this_node.getID()) { return(false); } } else { // we are flexible with the id, as long as the id wasn't removed // in the tree if (restrictedNames().get(other_node.getID())) { return(false); } } Debug.Assert(this_node.getLabeling() == other_node.getLabeling()); Debug.Assert(this_node.hasFinalFlag() == other_node.hasFinalFlag()); // this node looks good, now the children SafraTreeNode this_child = this_node.getOldestChild(); SafraTreeNode other_child = other_node.getOldestChild(); while (this_child != null && other_child != null) { if (!matches(this_child, other_child)) { return(false); } this_child = this_child.getYoungerBrother(); other_child = other_child.getYoungerBrother(); } Debug.Assert(this_child == null && other_child == null); return(true); }
/** Node visitor */ public void visit(SafraTree tree, SafraTreeNode node) { if (node.getLabeling().isEmpty()) { int id = node.getID(); if (_tree_template.isRenameable(id)) { // this node was created recently, so we only delete it in // renameableNames, but don't mark it in restrictedNodes _tree_template.setRenameable(id, false); } else { _tree_template.setRestricted(id); } tree.remove(node); } }
public void visit(SafraTree tree, SafraTreeNode node) { node.getLabeling().Minus(_bitset); }
/** Node visitor */ public void visit(SafraTree tree, SafraTreeNode node) { if (node.getChildCount() <= 1) { return; } int i = 0; //for (SafraTreeNode::child_iterator it= node->children_begin(); it!=node->children_end();++it) SafraTreeNode it = node.children_begin(); while (it != node.children_end()) { BitSet reachable_this = _node_reachability[it.getID()]; reachable_this.clear(); _node_order[it.getID()] = i++; BitSet label_this = it.getLabeling(); //for (BitSetIterator label_it(label_this); label_it != BitSetIterator::end(label_this); ++label_it) for (int label_it = 0; label_it < label_this.Count; label_it++) { reachable_this.Union(_nba_reachability[label_it]); } // std::cerr << "reachability_this: "<<reachable_this << std::endl; it = it.increment(); } // reorder... // std::cerr << "Sorting!" << std::endl; // Bubble sort, ough! bool finished = false; while (!finished) { finished = true; for (SafraTreeNode a = node.getOldestChild(); a != null && a.getYoungerBrother() != null; a = a.getYoungerBrother()) { SafraTreeNode b = a.getYoungerBrother(); BitSet reach_a = _node_reachability[a.getID()]; BitSet reach_b = _node_reachability[b.getID()]; if (reach_a.intersects(reach_b)) { // a and b are not independant... // --> keep relative order... System.Diagnostics.Debug.Assert(_node_order[a.getID()] < _node_order[b.getID()]); } else { // a and b are independant... if (!(a.getLabeling() < b.getLabeling())) { // swap node.swapChildren(a, b); a = b; finished = false; } } } } }