Examples with SafeDeleteNodeProcessor org.kie.workbench.common.stunner.core.graph.util.SafeDeleteNodeProcessor used on opensource projects

Example 1 with SafeDeleteNodeProcessor

use of org.kie.workbench.common.stunner.core.graph.util.SafeDeleteNodeProcessor in project kie-wb-common by kiegroup.

the class SafeDeleteNodeCommand method initialize.

@Override
@SuppressWarnings("unchecked")
protected SafeDeleteNodeCommand initialize(final GraphCommandExecutionContext context) {
    super.initialize(context);
    final Graph<?, Node> graph = getGraph(context);
    final Node<Definition<?>, Edge> candidate = (Node<Definition<?>, Edge>) getCandidate(context);
    new SafeDeleteNodeProcessor(new ChildrenTraverseProcessorImpl(new TreeWalkTraverseProcessorImpl()), graph, candidate).run(new SafeDeleteNodeProcessor.Callback() {

        private final Set<String> processedConnectors = new HashSet<String>();

        @Override
        public void deleteCandidateConnector(final Edge<? extends View<?>, Node> edge) {
        // This command will delete candidate's connectors once deleting the candidate node later on,
        // as it potentially performs the connectors shortcut operation.
        }

        @Override
        public void deleteConnector(final Edge<? extends View<?>, Node> edge) {
            doDeleteConnector(edge);
        }

        @Override
        public void removeChild(final Element<?> parent, final Node<?, Edge> candidate) {
            log("RemoveChildCommand [parent=" + parent.getUUID() + ", candidate=" + candidate.getUUID() + "]");
            addCommand(new RemoveChildCommand((Node<?, Edge>) parent, candidate));
            safeDeleteCallback.ifPresent(c -> c.removeChild(parent, candidate));
        }

        @Override
        public void removeDock(final Node<?, Edge> parent, final Node<?, Edge> candidate) {
            log("UnDockNodeCommand [parent=" + parent.getUUID() + ", candidate=" + candidate.getUUID() + "]");
            addCommand(new UnDockNodeCommand(parent, candidate));
            safeDeleteCallback.ifPresent(c -> c.removeDock(parent, candidate));
        }

        @Override
        public void deleteCandidateNode(final Node<?, Edge> node) {
            processCandidateConnectors();
            deleteNode(node);
        }

        @Override
        public void deleteNode(final Node<?, Edge> node) {
            log("DeregisterNodeCommand [node=" + node.getUUID() + "]");
            addCommand(new DeregisterNodeCommand(node));
            safeDeleteCallback.ifPresent(c -> c.deleteNode(node));
        }

        private void processCandidateConnectors() {
            if (options.isDeleteCandidateConnectors()) {
                if (options.isShortcutCandidateConnectors() && hasSingleIncomingEdge().and(hasSingleOutgoingEdge()).test(candidate)) {
                    final Edge<? extends ViewConnector<?>, Node> in = getViewConnector().apply(candidate.getInEdges());
                    final Edge<? extends ViewConnector<?>, Node> out = getViewConnector().apply(candidate.getOutEdges());
                    shortcut(in, out);
                } else {
                    Stream.concat(candidate.getInEdges().stream(), candidate.getOutEdges().stream()).filter(e -> e.getContent() instanceof ViewConnector).forEach(this::deleteConnector);
                }
            }
        }

        private void shortcut(final Edge<? extends ViewConnector<?>, Node> in, final Edge<? extends ViewConnector<?>, Node> out) {
            final ViewConnector<?> outContent = out.getContent();
            final Node targetNode = out.getTargetNode();
            addCommand(new DeleteConnectorCommand(out));
            safeDeleteCallback.ifPresent(c -> c.deleteCandidateConnector(out));
            addCommand(new SetConnectionTargetNodeCommand(targetNode, in, outContent.getTargetConnection().orElse(null)));
            safeDeleteCallback.ifPresent(c -> c.setEdgeTargetNode(targetNode, in));
        }

        private void doDeleteConnector(final Edge<? extends View<?>, Node> edge) {
            if (!processedConnectors.contains(edge.getUUID())) {
                log("IN DoDeleteConnector [edge=" + edge.getUUID() + "]");
                addCommand(new DeleteConnectorCommand(edge));
                safeDeleteCallback.ifPresent(c -> c.deleteConnector(edge));
                processedConnectors.add(edge.getUUID());
            }
        }
    });
    return this;
}