Exemplo n.º 1
0
 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;
 }
Exemplo n.º 2
0
 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();
 }
Exemplo n.º 3
0
 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);
 }
Exemplo n.º 4
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;
 }
Exemplo n.º 5
0
 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;
 }