Beispiel #1
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;
 }
Beispiel #2
0
 public ArcLabelledNodeIterator.LabelledArcIterator successors(int x) {
   NodeIterator iterator = advanceIterator(x);
   return iterator.successors();
 }