public void collapseNodesToStatement(Statement stat) {
Statement head = stat.getFirst();
Statement post = stat.getPost();
VBStyleCollection<Statement, Integer> setNodes = stat.getStats();
// post edges
if (post != null) {
for (StatEdge edge : post.getEdges(STATEDGE_DIRECT_ALL, DIRECTION_BACKWARD)) {
if (stat.containsStatementStrict(edge.getSource())) {
edge.getSource().changeEdgeType(DIRECTION_FORWARD, edge, StatEdge.TYPE_BREAK);
stat.addLabeledEdge(edge);
}
}
}
// regular head edges
for (StatEdge prededge : head.getAllPredecessorEdges()) {
if (prededge.getType() != StatEdge.TYPE_EXCEPTION
&& stat.containsStatementStrict(prededge.getSource())) {
prededge.getSource().changeEdgeType(DIRECTION_FORWARD, prededge, StatEdge.TYPE_CONTINUE);
stat.addLabeledEdge(prededge);
}
head.removePredecessor(prededge);
prededge.getSource().changeEdgeNode(DIRECTION_FORWARD, prededge, stat);
stat.addPredecessor(prededge);
}
if (setNodes.containsKey(first.id)) {
first = stat;
}
// exception edges
Set<Statement> setHandlers =
new HashSet<Statement>(head.getNeighbours(StatEdge.TYPE_EXCEPTION, DIRECTION_FORWARD));
for (Statement node : setNodes) {
setHandlers.retainAll(node.getNeighbours(StatEdge.TYPE_EXCEPTION, DIRECTION_FORWARD));
}
if (!setHandlers.isEmpty()) {
for (StatEdge edge : head.getEdges(StatEdge.TYPE_EXCEPTION, DIRECTION_FORWARD)) {
Statement handler = edge.getDestination();
if (setHandlers.contains(handler)) {
if (!setNodes.containsKey(handler.id)) {
stat.addSuccessor(new StatEdge(stat, handler, edge.getExceptions()));
}
}
}
for (Statement node : setNodes) {
for (StatEdge edge : node.getEdges(StatEdge.TYPE_EXCEPTION, DIRECTION_FORWARD)) {
if (setHandlers.contains(edge.getDestination())) {
node.removeSuccessor(edge);
}
}
}
}
if (post != null
&& !stat.getNeighbours(StatEdge.TYPE_EXCEPTION, DIRECTION_FORWARD)
.contains(post)) { // TODO: second condition redundant?
stat.addSuccessor(new StatEdge(StatEdge.TYPE_REGULAR, stat, post));
}
// adjust statement collection
for (Statement st : setNodes) {
stats.removeWithKey(st.id);
}
stats.addWithKey(stat, stat.id);
stat.setAllParent();
stat.setParent(this);
stat.buildContinueSet();
// monitorenter and monitorexit
stat.buildMonitorFlags();
if (stat.type == TYPE_SWITCH) {
// special case switch, sorting leaf nodes
((SwitchStatement) stat).sortEdgesAndNodes();
}
}
