Class FromState

demos/java/src/app/GraphData.java:168–193

    }

    static class FromState<T> {
        private int i = 0;
        private NodeInfoProvider<T> provider;
        private HashMap<T, NodeInfo<T>> infos = new HashMap<>();

        public FromState(NodeInfoProvider<T> provider) {
            this.provider = provider;
        }

        public String getId(NodeInfo<T> nodeInfo) {
            if (nodeInfo.id == null) {
                nodeInfo.id = "hediet.de/" + (i++);
            }
            return nodeInfo.id;
        }

        public NodeInfo<T> getNodeInfo(T item) {
            if (infos.containsKey(item)) {
                return infos.get(item);
            }

            NodeInfo<T> info = this.provider.getNodeInfo(item, new NodeInfo<>());
            infos.put(item, info);
            return info;
        }
    }

    public static class NodeInfo<T> {
        public ArrayList<EdgeInfo<T>> edges = new ArrayList<EdgeInfo<T>>();