Examples of gov.nasa.arc.mct.components.ModelStatePersistence

gov.nasa.arc.mct.components.ModelStatePersistence
This interface allows an AbstractComponent to persist state. The format of the state and schema evolution is the responsibility of the interface provider. Instances of this interface are retrieved from {@link AbstractComponent#getCapability(Class)}, so a component with persistent state should supply an instance from this method.

    
    if (!fullSave) {
      return;
    }
    cs.setObjVersion(ac.getVersion());
    ModelStatePersistence persistence = ac.getCapability(ModelStatePersistence.class);
    if (persistence != null) {
      cs.setModelInfo(persistence.getModelState());
    }
    
    // save relationships
    // non optimal implementation as this will require a query to get the relationships
    cs.setReferencedComponents(new ArrayList<ComponentSpec>(ac.getComponents().size()));

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    initializer.setOwner(cs.getOwner());
    initializer.setId(cs.getComponentId());
    ac.setExternalKey(cs.getExternalKey());
    ac.setDisplayName(cs.getComponentName());
    ac.getCapability(Updatable.class).setVersion(cs.getObjVersion());
        ModelStatePersistence persister = ac.getCapability(ModelStatePersistence.class);
        if ((persister != null) && (cs.getModelInfo() != null)) {
            persister.setModelState(cs.getModelInfo());
        }
    
    // Add ac to cache
    List<WeakReference<AbstractComponent>> list = cache.get(cs.getComponentId());
    if (list == null) {

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     * If the component's ModelStatePersistence falls out of sync with 
     * the component itself, then this should break.
     */
    @Test
    public void testPersistence() {
        ModelStatePersistence persistence = testComponent.getCapability(ModelStatePersistence.class);
        Assert.assertNotNull(persistence);
        
        persistence.setModelState("test");
        Assert.assertEquals(persistence.getModelState(), "test");
        Assert.assertEquals(testComponent.getCapability(ModelStatePersistence.class).getModelState(), "test");


        persistence.setModelState("retest");
        Assert.assertEquals(persistence.getModelState(), "retest");
        Assert.assertEquals(testComponent.getCapability(ModelStatePersistence.class).getModelState(), "retest");        
    }

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    GraphicalComponent a = new GraphicalComponent();
    GraphicalComponent b = new GraphicalComponent();
    a.getModelRole().setGraphicURI(uriOne);
    b.getModelRole().setGraphicURI(uriTwo);
    
    ModelStatePersistence persisterA = a.getCapability(ModelStatePersistence.class);
    ModelStatePersistence persisterB = b.getCapability(ModelStatePersistence.class);
    Assert.assertNotNull(persisterA);
    Assert.assertNotNull(persisterB);
    
    // Swap models
    String stateA = persisterA.getModelState();
    String stateB = persisterB.getModelState();
    persisterA.setModelState(stateB);
    persisterB.setModelState(stateA);


    // Ensure they have switched
    Assert.assertEquals(b.getModelRole().getGraphicURI(), uriOne);
    Assert.assertEquals(a.getModelRole().getGraphicURI(), uriTwo);
  }

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   * Unmarshal the model state
   * @param comp
   * @param xmlComp
   */
  private void unmarshalModelState(AbstractComponent comp, ComponentType xmlComp) {
    ModelStatePersistence persister = comp.getCapability(ModelStatePersistence.class);
    if (persister != null && xmlComp.getModelState() != null) {
            persister.setModelState(xmlComp.getModelState());
    }
  }

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   * 
   * @param comp component whose state is to be saved
   * @param xmlComp XML component to save the data to
   */
  private void marshalModelState(AbstractComponent comp, ComponentType xmlComp) {
    ModelStatePersistence persister = comp
        .getCapability(ModelStatePersistence.class);
    if (persister != null) {
      xmlComp.setModelState(persister.getModelState());
    }
  }

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