Esempio n. 1
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();
 }
Esempio n. 2
0
 public Graph(String file) throws IOException {
   org.apache.log4j.Logger logger =
       org.apache.log4j.Logger.getLogger("it.unimi.dsi.webgraph.ImmutableGraph");
   logger.setLevel(org.apache.log4j.Level.FATAL);
   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);
   String aux = null;
   Float weight = (float) 1.0;
   WeightedArcSet list = new WeightedArcSet();
   BufferedReader br;
   try {
     br =
         new BufferedReader(new InputStreamReader(new GZIPInputStream(new FileInputStream(file))));
   } catch (Exception ex) {
     br = new BufferedReader(new FileReader(file));
   }
   while ((aux = br.readLine()) != null)
     try {
       if (commit++ % COMMIT_SIZE == 0) {
         commit();
         list.commit();
       }
       String parts[] = aux.split("\t");
       String l1 = new String(parts[0]);
       String l2 = new String(parts[1]);
       if (!nodesReverse.containsKey(l1)) {
         nodesReverse.put(l1, nodesReverse.size());
         nodes.put(nodes.size(), l1);
       }
       if (!nodesReverse.containsKey(l2)) {
         nodesReverse.put(l2, nodesReverse.size());
         nodes.put(nodes.size(), l2);
       }
       if (parts.length == 3) weight = new Float(parts[2]);
       list.add(
           (WeightedArc) cons[0].newInstance(nodesReverse.get(l1), nodesReverse.get(l2), weight));
     } catch (Exception ex) {
       throw new Error(ex);
     }
   this.graph = new WeightedBVGraph(list.toArray(new WeightedArc[0]));
   br.close();
   list = new WeightedArcSet();
   br = new BufferedReader(new FileReader(file));
   while ((aux = br.readLine()) != null)
     try {
       if (commit++ % COMMIT_SIZE == 0) {
         commit();
         list.commit();
       }
       String parts[] = aux.split("\t");
       String l1 = new String(parts[0]);
       String l2 = new String(parts[1]);
       if (parts.length == 3) weight = new Float(parts[2]);
       list.add(
           (WeightedArc) cons[0].newInstance(nodesReverse.get(l2), nodesReverse.get(l1), weight));
     } catch (Exception ex) {
       throw new Error(ex);
     }
   br.close();
   this.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();
 }
Esempio n. 3
0
 public Graph(BVGraph graph) {
   org.apache.log4j.Logger logger =
       org.apache.log4j.Logger.getLogger("it.unimi.dsi.webgraph.ImmutableGraph");
   logger.setLevel(org.apache.log4j.Level.FATAL);
   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);
   Integer aux1 = null;
   WeightedArcSet list = new WeightedArcSet();
   it.unimi.dsi.webgraph.NodeIterator it = graph.nodeIterator();
   while ((aux1 = it.nextInt()) != null) {
     LazyIntIterator suc = it.successors();
     Integer aux2 = null;
     while ((aux2 = suc.nextInt()) != null && aux2 >= 0 && (aux2 < graph.numNodes()))
       try {
         if (commit++ % COMMIT_SIZE == 0) {
           list.commit();
         }
         list.add((WeightedArc) cons[0].newInstance(aux1, aux2, (float) 1.0));
       } catch (Exception ex) {
         throw new Error(ex);
       }
   }
   this.graph = new WeightedBVGraph(list.toArray(new WeightedArc[0]));
   list = new WeightedArcSet();
   it = graph.nodeIterator();
   while ((aux1 = it.nextInt()) != null) {
     LazyIntIterator suc = it.successors();
     Integer aux2 = null;
     while ((aux2 = suc.nextInt()) != null && aux2 >= 0 && (aux2 < graph.numNodes()))
       try {
         if (commit++ % COMMIT_SIZE == 0) {
           commit();
           list.commit();
         }
         list.add((WeightedArc) cons[0].newInstance(aux2, aux1, (float) 1.0));
         this.nodes.put(aux1, "" + aux1);
         this.nodes.put(aux2, "" + aux2);
         this.nodesReverse.put("" + aux1, aux1);
         this.nodesReverse.put("" + aux2, aux2);
       } catch (Exception ex) {
         throw new Error(ex);
       }
   }
   this.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();
 }