import org.eclipse.gef.handles.BendpointMoveHandle; //导入依赖的package包/类
@Override
protected List<?> createSelectionHandles() {
    final Relationship relation = (Relationship) getHost().getModel();
    if (relation.getSourceWalker() == relation.getTargetWalker()) {
        showSelectedLine();

        if (getHost().getRoot().getContents() instanceof ERDiagramEditPart) {
            // TODO ymd ここを通るケースを確認できず。消すかもしれない。
            final ERDiagramEditPart diagramEditPart = (ERDiagramEditPart) getHost().getRoot().getContents();
            diagramEditPart.refreshVisuals();
        }

        final List<BendpointMoveHandle> list = new ArrayList<>();
        list.add(new BendpointMoveHandle((ConnectionEditPart) getHost(), 1, 2));
        return list;
    }

    return super.createSelectionHandles();
}
 

import org.eclipse.gef.handles.BendpointMoveHandle; //导入依赖的package包/类
private List createHandlesForUserBendpoints() {
	List list = new ArrayList();
	ConnectionEditPart connEP = (ConnectionEditPart) getHost();
	PointList points = getConnection().getPoints();
	List bendPoints = (List) getConnection().getRoutingConstraint();
	int bendPointIndex = 0;
	Point currBendPoint = null;

	if (bendPoints == null)
		bendPoints = NULL_CONSTRAINT;
	else if (!bendPoints.isEmpty())
		currBendPoint = ((Bendpoint) bendPoints.get(0)).getLocation();

	for (int i = 0; i < points.size() - 1; i++) {
		// Put a create handle on the middle of every segment
		list.add(new BendpointCreationHandle(connEP, bendPointIndex, i));

		// If the current user bendpoint matches a bend location, show a
		// move handle
		if (i < points.size() - 1 && bendPointIndex < bendPoints.size()
				&& currBendPoint.equals(points.getPoint(i + 1))) {
			list.add(new BendpointMoveHandle(connEP, bendPointIndex, i + 1));

			// Go to the next user bendpoint
			bendPointIndex++;
			if (bendPointIndex < bendPoints.size())
				currBendPoint = ((Bendpoint) bendPoints.get(bendPointIndex))
						.getLocation();
		}
	}

	return list;
}
 

import org.eclipse.gef.handles.BendpointMoveHandle; //导入依赖的package包/类
@Override
protected List createSelectionHandles() {
    final Relation relation = (Relation) getHost().getModel();

    if (relation.getSource() == relation.getTarget()) {
        final List<BendpointMoveHandle> list = new ArrayList<BendpointMoveHandle>();

        final ConnectionEditPart connEP = (ConnectionEditPart) getHost();

        list.add(new BendpointMoveHandle(connEP, 1, 2));

        showSelectedLine();

        // ERDiagramEditPart diagramEditPart = (ERDiagramEditPart) this
        // .getHost().getRoot().getContents();
        // diagramEditPart.refreshVisuals();

        return list;
    }

    return super.createSelectionHandles();
}
 

import org.eclipse.gef.handles.BendpointMoveHandle; //导入依赖的package包/类
@Override
protected List createSelectionHandles() {
	Relation relation = (Relation) getHost().getModel();

	if (relation.getSource() == relation.getTarget()) {
		List<BendpointMoveHandle> list = new ArrayList<BendpointMoveHandle>();

		ConnectionEditPart connEP = (ConnectionEditPart) getHost();

		list.add(new BendpointMoveHandle(connEP, 1, 2));

		this.showSelectedLine();

		// ERDiagramEditPart diagramEditPart = (ERDiagramEditPart) this
		// .getHost().getRoot().getContents();
		// diagramEditPart.refreshVisuals();

		return list;
	}

	return super.createSelectionHandles();
}