Examples of com.google.code.gaeom.ObjectStoreSession

com.google.code.gaeom.ObjectStoreSession
The main point of interaction with the framework, ObjectStoreSession is typically scoped at the request level. Within an ObjectStoreSession, object identity will be guaranteed consistent. That is, if you retrieve an object and then, by virtue of a future query retrieve the same object, the framework will return the same instance rather than a duplicate copy. Each ObjectStoreSession is associated with an ObjectStore that caches all of the mapping metadata and the {@link com.google.code.gaeom.annotation.Cached} annotated instances. @author Peter Murray

  }


  @Test
  public void testCustomSinglePropertyEncoder()
  {
    ObjectStoreSession oss = ObjectStore.Factory.create().beginSession();
    LongEncodedEntity e = new LongEncodedEntity();
    oss.store(e).now();
    Point orig = e.p;
    e.p = null;
    oss.refresh(e).now();
    assertEquals(orig, e.p);
    assertEquals(orig, e.p);
  }

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  }


  @Test
  public void testCustomMultiPropertyEncoder()
  {
    ObjectStoreSession oss = ObjectStore.Factory.create().beginSession();
    MapEncodedEntity e = new MapEncodedEntity();
    oss.store(e).now();
    Point orig = e.p;
    e.p = null;
    oss.refresh(e).now();
    assertEquals(orig, e.p);
    assertEquals(orig, e.p);
  }

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  }


  @Test
  public void testCustomMultiPropertyEncoderCollection()
  {
    ObjectStoreSession oss = ObjectStore.Factory.create().beginSession();


    MapListEncoder mle = new MapListEncoder();
    mle.points.add(randomPoint());
    mle.points.add(randomPoint());
    mle.points.add(randomPoint());


    oss.store(mle).now();


    List<Point> orig = mle.points;
    mle.points = null;


    oss.refresh(mle).now();


    assertEquals(orig.get(0), mle.points.get(0));
    assertEquals(orig.get(1), mle.points.get(1));
    assertEquals(orig.get(2), mle.points.get(2));
    assertEquals(3, mle.points.size());

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  @Test
  public void testNullHandling()
  {
    A a = new A();


    ObjectStoreSession oss = ObjectStore.Factory.create().beginSession();
    oss.store(a).now();


    a.list = Collections.emptyList();
    a.map = Collections.emptyMap();


    oss.refresh(a).now();
    assertTrue(a.list == null);
    assertTrue(a.map == null);


    a.list = Lists.newArrayList();
    a.map = Maps.newHashMap();


    oss.store(a).now();


    a.list = null;
    a.map = null;


    oss.refresh(a).now();


    assertEquals(0, a.list.size());
    assertEquals(0, a.map.size());
  }

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  @Test
  public void testParenting()
  {
    Node node = create(3, 3);
    ObjectStoreSession oss = ObjectStore.Factory.create().beginSession();
    oss.store(node).now();


    testParent(oss, node, null);
  }

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  @Test
  public void demoTest()
  {
    ObjectStore os = ObjectStore.Factory.create();
    ObjectStoreSession oss = os.beginSession();


    Gaeom gaeom = new Gaeom();
    gaeom.description = "Supah object-datastore mapping";
    gaeom.rocks = true;


    oss.store(gaeom).id(1).now();


    os.beginSession().load(Gaeom.class).id(1).now();


    os.beginSession().find(Gaeom.class).single().now();

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  public void testEmbeddedQuerying()
  {
    A a = new A();
    a.p = new Point(10, 20);


    ObjectStoreSession oss = ObjectStore.Factory.create().beginSession();
    oss.store(a).now();


    A a1 = oss.find(A.class).filter("p", new Point(10, 20)).single().now();


    assertEquals(a, a1);
  }

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  public void testFailedEmbeddedQuerying()
  {
    A a = new A();
    a.p = new Point(10, 20);


    ObjectStoreSession oss = ObjectStore.Factory.create().beginSession();
    oss.store(a).now();


    oss.find(A.class).filter("p", Op.GreaterThan, new Point(10, 20)).single().now();
  }

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  @Test
  public void testByFilteringForNull() throws Exception
  {
    ObjectStore os = ObjectStore.Factory.create();
    ObjectStoreSession oss = os.beginSession();


    A a1 = new A();
    A a2 = new A();
    a2.b = new B();


    oss.store(a1, a2).now();


    A a1a = oss.find(A.class).filter("b", null).single().now();
    assertEquals(a1, a1a);


    A a2a = oss.find(A.class).filter("b", Find.Op.NotEqualTo, null).single().now();
    assertEquals(a2, a2a);
  }

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  @Test
  public void testByFilteringForNullEmbedded() throws Exception
  {
    ObjectStore os = ObjectStore.Factory.create();
    ObjectStoreSession oss = os.beginSession();


    A2 a1 = new A2();
    A2 a2 = new A2();
    a2.b = new B();


    oss.store(a1, a2).now();


    A2 a1a = oss.find(A2.class).filter("b", null).single().now();
    assertEquals(a1, a1a);


//    A2 a2a = oss.find(A2.class).filter("b", Find.Op.NotEqualTo, null).single().now();
//    assertEquals(a2, a2a);
  }

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