Method copyTo

core/src/main/java/overflowdb/Graph.java:396–414

Copies all nodes/edges into the given empty graph, preserving their ids and properties.

(Graph destination)

  /** Copies all nodes/edges into the given empty graph, preserving their ids and properties. */
  public void copyTo(Graph destination) {
    if (destination.nodeCount() > 0) throw new AssertionError("destination graph must be empty, but isn't");
    nodes().forEachRemaining(node -> {
      destination.addNode(node.id(), node.label(), PropertyHelper.toKeyValueArray(node.propertiesMap()));
    });
    nodes().forEachRemaining( node -> {
      NodeDb mapped =  ((NodeRef<NodeDb>) destination.node(node.id())).get();

      node.outE().forEachRemaining(edge -> {
                NodeRef<?> other = (NodeRef<?>) destination.node(edge.inNode().id());
                mapped.storeAdjacentNode(Direction.OUT, edge.label(), other, PropertyHelper.toKeyValueArray(edge.propertiesMap()));
      });
      node.inE().forEachRemaining(edge -> {
        NodeRef<?> other = (NodeRef<?>) destination.node(edge.outNode().id());
        mapped.storeAdjacentNode(Direction.IN, edge.label(), other, PropertyHelper.toKeyValueArray(edge.propertiesMap()));
      });

    });
  }

  public void remove(Node node) {
    final NodeRef nodeRef = getNodeRef(node);