@Override
  public PictogramElement add(IAddContext context) {
    final NamespaceDeclaration namespaceDeclaration = (NamespaceDeclaration) context.getNewObject();

    final Diagram targetDiagram = (Diagram) context.getTargetContainer();

    // CONTAINER SHAPE WITH ROUNDED RECTANGLE
    IPeCreateService peCreateService = Graphiti.getPeCreateService();
    ContainerShape containerShape = peCreateService.createContainerShape(targetDiagram, true);

    // define a default size for the shape
    int width = 100;
    int height = 50;
    IGaService gaService = Graphiti.getGaService();
    RoundedRectangle roundedRectangle; // need to access it later

    // create and set graphics algorithm
    roundedRectangle = gaService.createRoundedRectangle(containerShape, 5, 5);
    roundedRectangle.setForeground(manageColor(IColorConstant.BLACK));
    roundedRectangle.setBackground(manageColor(IColorConstant.WHITE));
    roundedRectangle.setLineWidth(2);
    gaService.setLocationAndSize(roundedRectangle, context.getX(), context.getY(), width, height);

    // create link and wire it
    link(containerShape, namespaceDeclaration);

    // create shape for text
    Shape shape = peCreateService.createShape(containerShape, false);

    // create and set text graphics algorithm
    Text text = gaService.createText(shape, namespaceDeclaration.getName());
    text.setForeground(manageColor(IColorConstant.BLACK));
    text.setHorizontalAlignment(Orientation.ALIGNMENT_CENTER);
    // vertical alignment has as default value "center"
    text.setFont(gaService.manageDefaultFont(getDiagram(), false, true));
    gaService.setLocationAndSize(text, 0, 0, width, 20);

    // create link and wire it
    link(shape, namespaceDeclaration);

    return containerShape;
  }
  // Adds a User Application figure to the target object
  @Override
  public PictogramElement add(final IAddContext context) {

    TDeploymentArtifact addedClass = (TDeploymentArtifact) context.getNewObject();

    ContainerShape targetDiagram = (ContainerShape) context.getTargetContainer();
    Object[] targetDiagrams = targetDiagram.getChildren().toArray();
    int ySD = 0;
    int interdist = 0;
    for (int i = 0; i < targetDiagrams.length; i++) {
      Object o = getBusinessObjectForPictogramElement((Shape) targetDiagrams[i]);
      if (o instanceof UserApplication) interdist = 3;
    }
    for (int i = 0; i < targetDiagrams.length; i++) {
      Object o = getBusinessObjectForPictogramElement((Shape) targetDiagrams[i]);
      if (((Shape) targetDiagrams[i]).getGraphicsAlgorithm() instanceof Rectangle
          || (o instanceof SoftwareDependency)) {
        if (((Shape) targetDiagrams[i]).getGraphicsAlgorithm() instanceof Rectangle) {
          ySD = ((Shape) targetDiagrams[i]).getGraphicsAlgorithm().getY();
        }
        ((Shape) targetDiagrams[i])
            .getGraphicsAlgorithm()
            .setY(((Shape) targetDiagrams[i]).getGraphicsAlgorithm().getY() + 20 + interdist);
      }
    }
    // CONTAINER SHAPE WITH ROUNDED RECTANGLE
    IPeCreateService peCreateService = Graphiti.getPeCreateService();
    ContainerShape containerShape = peCreateService.createContainerShape(targetDiagram, true);
    final int width = StyleUtil.SOFT_DEPENDENCY_WIDTH;
    final int height = 20;
    IGaService gaService = Graphiti.getGaService();
    RoundedRectangle roundedRectangle;
    {
      // create and set graphics algorithm
      int x = (StyleUtil.APP_COMPONENT_WIDTH - width) / 2;
      roundedRectangle = gaService.createRoundedRectangle(containerShape, 5, 5);
      roundedRectangle.setForeground(manageColor(E_CLASS_FOREGROUND));
      roundedRectangle.setBackground(manageColor(E_CLASS_BACKGROUND));
      roundedRectangle.setLineWidth(2);
      gaService.setLocationAndSize(roundedRectangle, x, ySD - 10 + interdist, width, height);
      if (addedClass.eResource() == null) {
        getDiagram().eResource().getContents().add(addedClass);
      }
      // create link and wire it
      link(containerShape, addedClass);
    }
    // SHAPE WITH LINE
    {
      // create shape for line
      Shape shape = peCreateService.createShape(containerShape, false);
      // create and set graphics algorithm
      Polyline polyline = gaService.createPolyline(shape, new int[] {0, 20, width, 20});
      polyline.setForeground(manageColor(E_CLASS_FOREGROUND));
      polyline.setLineWidth(2);
    }
    // SHAPE WITH TEXT
    {
      // create shape for text
      Shape shape = peCreateService.createShape(containerShape, false);
      // create and set text graphics algorithm
      Text text = gaService.createText(shape, addedClass.getName());
      text.setForeground(manageColor(E_CLASS_TEXT_FOREGROUND));
      text.setHorizontalAlignment(Orientation.ALIGNMENT_CENTER);
      // vertical alignment has as default value "center"
      text.setFont(gaService.manageDefaultFont(getDiagram(), false, true));
      gaService.setLocationAndSize(text, 0, 0, width, 20);
      // create link and wire it
      link(shape, addedClass);
    }
    return containerShape;
  }