Examples of org.graphstream.graph.Graph

org.graphstream.graph.Graph
omething with node } With implicit genericity offers by Graph, this can be done easier:
```
 Graph g = ... ; g.setNodeFactory( new MyNodeFactory() ); g.addNode("root"); MyNode n = g.getNode("root"); for( MyNode node : g.getEachNode() ) { // Do something with node } 
```
Graph elements (nodes and edges) can be accessed using their identifier or their index. Each node / edge has a unique string identifier assigned when the element is created. Each element has an automatically maintained unique index between 0 and {@link #getNodeCount()} - 1 or {@link #getEdgeCount()} -1. When a new element is added, its index is getNodeCount() - 1 or getEdgeCount() - 1. When an element is removed, the element with the biggest index takes its place. Unlike identifiers, indices can change when the graph is modified, but they are always successive. A loop of the form
```
 for (int i = 0; i < g.getNodeCount(); i++) { Node node = g.getNode(i); // Do something with node } 
```
will always iterate on all the nodes of g.

    graph.getFirstAttributeOf("nonExisting", "nonExisting2", "nonExisting3");
  }
  
  @Test(expected=NullAttributeException.class)
  public void testElementValueAttributeNull3() {
    Graph graph = new MultiGraph("g");
    graph.setNullAttributesAreErrors(true);
    graph.getNumber("foo");
  }

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    graph.getNumber("foo");
  }
  
  @Test(expected=NullAttributeException.class)
  public void testElementValueAttributeNull4() {
    Graph graph = new MultiGraph("g");
    graph.setNullAttributesAreErrors(true);
    graph.addAttribute("foo","ah ah ah");
    graph.getNumber("foo");
  }

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    graph.getNumber("foo");
  }
  
  @Test(expected=NullAttributeException.class)
  public void testElementValueAttributeNull5() {
    Graph graph = new MultiGraph("g");
    graph.setNullAttributesAreErrors(true);
    graph.getLabel("foo");
  }

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  public static void main(String[] args) throws UnknownHostException,
      IOException, InterruptedException {
    // ----- On the receiver side -----
    //
    // - a graph that will display the received events
    Graph g = new MultiGraph("G");
    g.display();
    // - the receiver that waits for events
    NetStreamReceiver net = new NetStreamReceiver(2001);
    
    net.setUnpacker(new Base64Unpacker());
    net.setDebugOn(false);
    
    // - received events end up in the "default" pipe
    ThreadProxyPipe pipe = net.getDefaultStream();
    // - plug the pipe to the sink of the graph
    pipe.addSink(g);


    // ----- The sender side (in another thread) ------
    //
    new Thread() {


      public void run() {
        // - the original graph from which events are generated
        Graph g = new MultiGraph("G");
        // - the sender
        NetStreamSender nsc = null;
        try {
          nsc = new NetStreamSender(2001);
        } catch (UnknownHostException e) {
          e.printStackTrace();
        } catch (IOException e) {
          e.printStackTrace();
        }
        
        nsc.setPacker(new Base64Packer());


        
        // - plug the graph to the sender so that graph events can be
        // sent automatically
        g.addSink(nsc);
        // - generate some events on the client side
        String style = "node{fill-mode:plain;fill-color:#567;size:6px;}";
        g.addAttribute("stylesheet", style);
        g.addAttribute("ui.antialias", true);
        g.addAttribute("layout.stabilization-limit", 0);
        for (int i = 0; i < 5000; i++) {
          g.addNode(i + "");
          if (i > 0) {
            g.addEdge(i + "-" + (i - 1), i + "", (i - 1) + "");
            g.addEdge(i + "--" + (i / 2), i + "", (i / 2) + "");
          }
        }
      }
    }.start();

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    graph.getLabel("foo");
  }
  
  @Test(expected=NullAttributeException.class)
  public void testElementValueAttributeNull6() {
    Graph graph = new MultiGraph("g");
    graph.setNullAttributesAreErrors(true);
    graph.addAttribute("foo",5);
    graph.getLabel("foo");
  }

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    graph.getLabel("foo");
  }


  @Test
  public void testElementMultiAttributes() {
    Graph graph = new MultiGraph("g1");


    Node A = graph.addNode("A");


    assertEquals("A", A.getId());
    assertEquals(0, A.getAttributeCount());


    // Arrays

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    assertNotNull(A.getAttribute("array"));
  }


  @Test
  public void testElementUtilityMethods() {
    Graph graph = new MultiGraph("g1");


    Node A = graph.addNode("A");


    assertEquals("A", A.getId());
    assertEquals(0, A.getAttributeCount());


    // First attribute of.

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    assertEquals(1, n);
  }


  @Test
  public void testElementIterables() {
    Graph graph = new MultiGraph("g1");


    Node A = graph.addNode("A");


    assertEquals("A", A.getId());
    assertEquals(0, A.getAttributeCount());


    // First attribute of.

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    assertTrue(keys.contains("C"));
  }


  @Test
  public void testNullAttributes() {
    Graph graph = new MultiGraph("g1");


    graph.addAttribute("foo");
    graph.addAttribute("bar", (Object) null); // Yes an attribute with a
                          // null value, You can !


    assertTrue(graph.hasAttribute("foo"));
    assertTrue(graph.hasAttribute("bar"));


    graph.removeAttribute("foo");
    graph.removeAttribute("bar");


    assertFalse(graph.hasAttribute("foo"));
    assertFalse(graph.hasAttribute("bar"));
  }

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  @Test
  public void test() {
    RMISink sink;
    RMISource source;


    Graph g1 = new DefaultGraph("g1");
    Graph g2 = new DefaultGraph("g2");


    try {
      LocateRegistry.createRegistry(1099);
    } catch (Exception e) {


    }


    try {
      String name = "__test_rmi_source";


      sink = new RMISink();
      g1.addSink(sink);


      source = new RMISource();
      source.addSink(g2);


      source.bind(name);
      sink.register("//localhost/" + name);
    } catch (RemoteException e) {
      fail();
    }


    Node A = g1.addNode("A");
    Node B = g1.addNode("B");
    Node C = g1.addNode("C");


    Edge AB = g1.addEdge("AB", "A", "B", false);
    Edge AC = g1.addEdge("AC", "A", "C", true);
    Edge BC = g1.addEdge("BC", "B", "C", false);


    A.addAttribute("int", 1);
    B.addAttribute("string", "test");
    C.addAttribute("double", 2.0);


    AB.addAttribute("points",
        (Object) (new double[][] { { 1, 1 }, { 2, 2 } }));
    LinkedList<Integer> list = new LinkedList<Integer>();
    list.add(1);
    list.add(2);
    AC.addAttribute("list", list);
    BC.addAttribute("boolean", true);


    // -----


    A = g2.getNode("A");
    B = g2.getNode("B");
    C = g2.getNode("C");


    assertNotNull(A);
    assertNotNull(B);
    assertNotNull(C);
    assertEquals(g2.getNodeCount(), 3);


    AB = g2.getEdge("AB");
    AC = g2.getEdge("AC");
    BC = g2.getEdge("BC");


    assertNotNull(AB);
    assertNotNull(AC);
    assertNotNull(BC);
    assertEquals(g2.getEdgeCount(), 3);


    assertEquals("A", AB.getNode0().getId());
    assertEquals("B", AB.getNode1().getId());
    assertEquals("A", AC.getNode0().getId());
    assertEquals("C", AC.getNode1().getId());

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