public Graph copy() {
WeightedArcSet list = new WeightedArcSet();
Constructor[] cons = WeightedArc.class.getDeclaredConstructors();
for (int i = 0; i < cons.length; i++) cons[i].setAccessible(true);
ArcLabelledNodeIterator it = graph.nodeIterator();
while (it.hasNext()) {
Integer aux1 = it.nextInt();
Integer aux2 = null;
ArcLabelledNodeIterator.LabelledArcIterator suc = it.successors();
while ((aux2 = suc.nextInt()) != null && aux2 >= 0 && (aux2 < graph.numNodes()))
try {
if (commit++ % COMMIT_SIZE == 0) {
list.commit();
}
WeightedArc arc = (WeightedArc) cons[0].newInstance(aux2, aux1, suc.label().getFloat());
list.add(arc);
} catch (Exception ex) {
throw new Error(ex);
}
}
Graph result = new Graph(list.toArray(new WeightedArc[0]));
result.nodes.clear();
result.nodesReverse.clear();
for (Integer n : this.nodes.keySet()) {
if (commit++ % COMMIT_SIZE == 0) {
result.commit();
}
result.nodesReverse.put(this.nodes.get(n), n);
result.nodes.put(n, this.nodes.get(n));
}
return result;
}
public Graph(WeightedBVGraph graph, String[] names) {
org.apache.log4j.Logger logger =
org.apache.log4j.Logger.getLogger("it.unimi.dsi.webgraph.ImmutableGraph");
logger.setLevel(org.apache.log4j.Level.FATAL);
if (names.length != graph.numNodes())
throw new Error("Problem with the list of names for the nodes in the graph.");
try {
File auxFile = File.createTempFile("graph-maps-" + System.currentTimeMillis(), "aux");
auxFile.deleteOnExit();
RecordManager recMan = RecordManagerFactory.createRecordManager(auxFile.getAbsolutePath());
nodes = recMan.hashMap("nodes");
nodesReverse = recMan.hashMap("nodesReverse");
} catch (IOException ex) {
throw new Error(ex);
}
nodes.clear();
nodesReverse.clear();
Constructor[] cons = WeightedArc.class.getDeclaredConstructors();
for (int i = 0; i < cons.length; i++) cons[i].setAccessible(true);
this.graph = graph;
WeightedArcSet list = new WeightedArcSet();
ArcLabelledNodeIterator it = graph.nodeIterator();
while (it.hasNext()) {
if (commit++ % COMMIT_SIZE == 0) {
commit();
list.commit();
}
Integer aux1 = it.nextInt();
Integer aux2 = null;
ArcLabelledNodeIterator.LabelledArcIterator suc = it.successors();
while ((aux2 = suc.nextInt()) != null && aux2 >= 0 && (aux2 < graph.numNodes()))
try {
WeightedArc arc = (WeightedArc) cons[0].newInstance(aux2, aux1, suc.label().getFloat());
list.add(arc);
this.nodes.put(aux1, names[aux1]);
this.nodes.put(aux2, names[aux2]);
this.nodesReverse.put(names[aux1], aux1);
this.nodesReverse.put(names[aux2], aux2);
} catch (Exception ex) {
throw new Error(ex);
}
}
reverse = new WeightedBVGraph(list.toArray(new WeightedArc[0]));
numArcs = list.size();
iterator = nodeIterator();
try {
File auxFile = File.createTempFile("graph" + System.currentTimeMillis(), "aux");
auxFile.deleteOnExit();
String basename = auxFile.getAbsolutePath();
store(basename);
} catch (IOException ex) {
throw new Error(ex);
}
commit();
}
public float weight(int x, int y) {
ArcLabelledNodeIterator.LabelledArcIterator suc = successors(x);
Integer aux;
while ((aux = suc.nextInt()) != null && aux >= 0 && (aux < numNodes()))
try {
if (aux == y) return suc.label().getFloat();
} catch (Exception ex) {
throw new Error(ex);
}
return (float) (0.0);
}
public Graph neighbourhoodGraph(int nnodes[], int hops) {
PrimaryHashMap<Integer, String> nodes;
PrimaryHashMap<String, Integer> nodesReverse;
try {
File auxFile = File.createTempFile("graph-maps-" + System.currentTimeMillis(), "aux");
auxFile.deleteOnExit();
RecordManager recMan = RecordManagerFactory.createRecordManager(auxFile.getAbsolutePath());
nodes = recMan.hashMap("nodes");
nodesReverse = recMan.hashMap("nodesReverse");
} catch (IOException ex) {
throw new Error(ex);
}
nodes.clear();
nodesReverse.clear();
WeightedArcSet list1 = new WeightedArcSet();
Int2IntAVLTreeMap map = new Int2IntAVLTreeMap();
IntSet set = new IntLinkedOpenHashSet();
int numIterators = 100;
Constructor[] cons = WeightedArc.class.getDeclaredConstructors();
for (int i = 0; i < cons.length; i++) cons[i].setAccessible(true);
for (int n : nnodes) map.put(n, 0);
NodeIterator its[] = new NodeIterator[numIterators];
int itNum[] = new int[numIterators];
for (int n = 0; n < its.length; n++) {
its[n] = nodeIterator();
itNum[n] = 0;
}
while (map.size() != 0) {
Integer node = 0;
for (int n = 0; n < its.length; n++) if (itNum[n] <= node) node = itNum[n];
node = map.tailMap(node).firstKey();
if (node == null) map.firstKey();
NodeIterator it = null;
Integer aux1 = 0;
int iit = 0;
for (int n = 0; n < its.length; n++) {
if (!its[n].hasNext()) {
its[n] = nodeIterator();
itNum[n] = 0;
}
if (itNum[n] == node) {
it = its[n];
aux1 = itNum[n];
iit = 0;
break;
}
if (itNum[n] < node && itNum[n] >= aux1) {
it = its[n];
aux1 = itNum[n];
iit = n;
}
}
if (it == null) {
its[0] = nodeIterator();
itNum[0] = 0;
it = its[0];
}
while (it != null && (aux1 = it.nextInt()) != null && aux1 >= 0 && aux1 < node) {}
itNum[iit] = aux1 + 1;
Integer aux2 = null;
ArcLabelledNodeIterator.LabelledArcIterator suc = it.successors();
while ((aux2 = suc.nextInt()) != null && aux2 >= 0 && (aux2 < graph.numNodes()))
try {
if (commit++ % COMMIT_SIZE == 0) {
try {
nodes.getRecordManager().commit();
} catch (IOException e) {
throw new Error(e);
}
try {
nodesReverse.getRecordManager().commit();
} catch (IOException e) {
throw new Error(e);
}
}
if (!nodesReverse.containsKey(this.nodes.get(aux1))) {
nodes.put(nodes.size(), this.nodes.get(aux1));
nodesReverse.put(this.nodes.get(aux1), nodesReverse.size());
}
if (!nodesReverse.containsKey(this.nodes.get(aux2))) {
nodes.put(nodes.size(), this.nodes.get(aux2));
nodesReverse.put(this.nodes.get(aux2), nodesReverse.size());
}
int aaux1 = nodesReverse.get(this.nodes.get(aux1));
int aaux2 = nodesReverse.get(this.nodes.get(aux2));
WeightedArc arc1 =
(WeightedArc) cons[0].newInstance(aaux1, aaux2, suc.label().getFloat());
list1.add(arc1);
if (map.get(node) < hops) {
if (!set.contains(aux1) && (map.get(aux1) == null || map.get(aux1) > map.get(node) + 1))
map.put(aux1.intValue(), map.get(node) + 1);
if (!set.contains(aux2) && (map.get(aux2) == null || map.get(aux2) > map.get(node) + 1))
map.put(aux2.intValue(), map.get(node) + 1);
}
} catch (Exception ex) {
ex.printStackTrace();
throw new Error(ex);
}
ArcLabelledNodeIterator.LabelledArcIterator anc = it.ancestors();
while ((aux2 = anc.nextInt()) != null && aux2 >= 0 && (aux2 < graph.numNodes()))
try {
if (commit++ % COMMIT_SIZE == 0) {
try {
nodes.getRecordManager().commit();
} catch (IOException e) {
throw new Error(e);
}
try {
nodesReverse.getRecordManager().commit();
} catch (IOException e) {
throw new Error(e);
}
}
if (!nodesReverse.containsKey(this.nodes.get(aux1))) {
nodes.put(nodes.size(), this.nodes.get(aux1));
nodesReverse.put(this.nodes.get(aux1), nodesReverse.size());
}
if (!nodesReverse.containsKey(this.nodes.get(aux2))) {
nodes.put(nodes.size(), this.nodes.get(aux2));
nodesReverse.put(this.nodes.get(aux2), nodesReverse.size());
}
int aaux1 = nodesReverse.get(this.nodes.get(aux1));
int aaux2 = nodesReverse.get(this.nodes.get(aux2));
WeightedArc arc1 =
(WeightedArc) cons[0].newInstance(aaux2, aaux1, anc.label().getFloat());
list1.add(arc1);
if (map.get(node) < hops) {
if (!set.contains(aux1) && (map.get(aux1) == null || map.get(aux1) > map.get(node) + 1))
map.put(aux1.intValue(), map.get(node) + 1);
if (!set.contains(aux2) && (map.get(aux2) == null || map.get(aux2) > map.get(node) + 1))
map.put(aux2.intValue(), map.get(node) + 1);
}
} catch (Exception ex) {
ex.printStackTrace();
throw new Error(ex);
}
map.remove(node);
set.add(node);
}
Graph newGraph = new Graph(list1.toArray(new WeightedArc[0]));
newGraph.nodes.clear();
newGraph.nodesReverse.clear();
newGraph.nodes = nodes;
newGraph.nodesReverse = nodesReverse;
return newGraph;
}
public static Graph merge(Graph g1, Graph g2) {
int commit = 0;
WeightedArcSet list = new WeightedArcSet();
Constructor[] cons = WeightedArc.class.getDeclaredConstructors();
for (int i = 0; i < cons.length; i++) cons[i].setAccessible(true);
ArcLabelledNodeIterator it1 = g1.graph.nodeIterator();
while (it1.hasNext()) {
Integer aux1 = it1.nextInt();
ArcLabelledNodeIterator.LabelledArcIterator suc = it1.successors();
Integer aux2 = null;
while ((aux2 = suc.nextInt()) != null && aux2 >= 0 && (aux2 < g1.graph.numNodes()))
try {
WeightedArc arc = (WeightedArc) cons[0].newInstance(aux1, aux2, suc.label().getFloat());
list.add(arc);
if (commit++ % COMMIT_SIZE == 0) {
list.commit();
}
} catch (Exception ex) {
throw new Error(ex);
}
}
ArcLabelledNodeIterator it2 = g2.graph.nodeIterator();
while (it2.hasNext()) {
Integer aux1 = it2.nextInt();
ArcLabelledNodeIterator.LabelledArcIterator suc = it2.successors();
Integer aux2 = null;
while ((aux2 = suc.nextInt()) != null && aux2 >= 0 && (aux2 < g2.graph.numNodes()))
try {
int aaux1 = aux1 + g1.numNodes();
int aaux2 = aux2 + g1.numNodes();
if (g1.nodes.get(aux1) != null && g1.nodes.get(aux1).equals(g2.nodes.get(aux1)))
aaux1 = g1.nodesReverse.get(g2.nodes.get(aux1));
if (g1.nodes.get(aux2) != null && g1.nodes.get(aux2).equals(g2.nodes.get(aux2)))
aaux2 = g1.nodesReverse.get(g2.nodes.get(aux2));
WeightedArc arc = (WeightedArc) cons[0].newInstance(aux1, aux2, suc.label().getFloat());
list.add(arc);
if (commit++ % COMMIT_SIZE == 0) {
list.commit();
}
} catch (Exception ex) {
throw new Error(ex);
}
}
Graph result = new Graph(list.toArray(new WeightedArc[0]));
result.nodes.clear();
result.nodesReverse.clear();
for (Integer n : g1.nodes.keySet()) {
result.nodesReverse.put(g1.nodes.get(n), n);
result.nodes.put(n, g1.nodes.get(n));
if (commit++ % COMMIT_SIZE == 0) {
result.commit();
}
}
for (Integer n : g2.nodes.keySet()) {
int nn = n + g1.numNodes();
if (g1.nodes.get(n) != null && g1.nodes.get(n).equals(g2.nodes.get(n)))
nn = g1.nodesReverse.get(g2.nodes.get(n));
result.nodesReverse.put(g2.nodes.get(n), nn);
result.nodes.put(nn, g2.nodes.get(n));
if (commit++ % COMMIT_SIZE == 0) {
result.commit();
}
}
result.iterator = result.nodeIterator();
return result;
}