我有非常简单的图表

strict digraph G {
  <assembly-raw-file>;
  <dataset-processing>;
  <feature-processing-1>;
  <feature-processing-2>;
  <mh.permute-variables-and-hyper-params>;
  <mh.finish>;
  <assembly-raw-file> -> <dataset-processing>;
  <dataset-processing> -> <feature-processing-1>;
  <dataset-processing> -> <feature-processing-2>;
  <dataset-processing> -> <mh.permute-variables-and-hyper-params>;
  <feature-processing-1> -> <mh.permute-variables-and-hyper-params>;
  <feature-processing-2> -> <mh.permute-variables-and-hyper-params>;
  <mh.permute-variables-and-hyper-params> -> <mh.finish>;
}

我正在尝试使用以下代码导入它

DirectedAcyclicGraph<String, DefaultEdge> processGraph = new DirectedAcyclicGraph<>(
        SupplierUtil.createStringSupplier(), SupplierUtil.DEFAULT_EDGE_SUPPLIER, false);

DOTImporter<String, DefaultEdge> importer = new DOTImporter<>();
importer.importGraph(processGraph, new StringReader(wpy.processesGraph));

但这段代码正在将顶点名称更改为：

strict digraph G {
  0;
  1;
  2;
  3;
  4;
  5;
  0 -> 1;
  1 -> 2;
  1 -> 3;
  1 -> 4;
  2 -> 4;
  3 -> 4;
  4 -> 5;
}

如何导入我的图并保留顶点 ID？

或者更简单的解决方案是将顶点类型从 String 更改为复杂类？

2020 年 3 月 4 日更新：

如果您使用的是 1.4.1 SNAPSHOT 版本（或更高版本），有一种更简单的方法可以获得所需的结果：只需使用importer.setVertexFactory(id->id);

仅在用户提供（例如工厂）的情况下，才会使用文件中的顶点标识符来调用它。从文件中给出顶点标识符的方法应该返回实际的图顶点。用户返回的顶点直接添加到图中，而不使用顶点提供者。

如果没有提供这样的工厂，则默认行为是从图顶点供应商获取新顶点，并将文件中的原始标识符关联为新顶点的属性。

将其应用到上面的例子中，我们得到：

String input="strict digraph G {\n" +
        "  <assembly-raw-file>;\n" +
        "  <dataset-processing>;\n" +
        "  <feature-processing-1>;\n" +
        "  <feature-processing-2>;\n" +
        "  <mh.permute-variables-and-hyper-params>;\n" +
        "  <mh.finish>;\n" +
        "  <assembly-raw-file> -> <dataset-processing>;\n" +
        "  <dataset-processing> -> <feature-processing-1>;\n" +
        "  <dataset-processing> -> <feature-processing-2>;\n" +
        "  <dataset-processing> -> <mh.permute-variables-and-hyper-params>;\n" +
        "  <feature-processing-1> -> <mh.permute-variables-and-hyper-params>;\n" +
        "  <feature-processing-2> -> <mh.permute-variables-and-hyper-params>;\n" +
        "  <mh.permute-variables-and-hyper-params> -> <mh.finish>;\n" +
        "}";
Graph<String, DefaultEdge> graph = new SimpleDirectedGraph<>(DefaultEdge.class);
DOTImporter<String, DefaultEdge> importer = new DOTImporter<>();
importer.setVertexFactory(id->id);
importer.importGraph(graph, new StringReader(input));
System.out.println(graph);

原答案：

这是一种方法。此方法使用 2 个步骤。第一步，我像您一样阅读了图表。顶点名称可以存储在属性映射中。在第二步中，我创建一个新图，它使用第一个图的结构，但重命名了顶点。

String input="strict digraph G {\n" +
        "  <assembly-raw-file>;\n" +
        "  <dataset-processing>;\n" +
        "  <feature-processing-1>;\n" +
        "  <feature-processing-2>;\n" +
        "  <mh.permute-variables-and-hyper-params>;\n" +
        "  <mh.finish>;\n" +
        "  <assembly-raw-file> -> <dataset-processing>;\n" +
        "  <dataset-processing> -> <feature-processing-1>;\n" +
        "  <dataset-processing> -> <feature-processing-2>;\n" +
        "  <dataset-processing> -> <mh.permute-variables-and-hyper-params>;\n" +
        "  <feature-processing-1> -> <mh.permute-variables-and-hyper-params>;\n" +
        "  <feature-processing-2> -> <mh.permute-variables-and-hyper-params>;\n" +
        "  <mh.permute-variables-and-hyper-params> -> <mh.finish>;\n" +
        "}";
Graph<String, DefaultEdge> graph = new SimpleDirectedGraph<>(SupplierUtil.createStringSupplier(), SupplierUtil.DEFAULT_EDGE_SUPPLIER, false);

//Import the graph; the vertex names are stored as 'ID' in the attribute map
DOTImporter<String, DefaultEdge> importer = new DOTImporter<>();
Map<String, Map<String, Attribute>> attrs = new HashMap<>();
importer.addVertexAttributeConsumer((p, a) -> {
    Map<String, Attribute> map = attrs.computeIfAbsent(p.getFirst(), k -> new HashMap<>());
    map.put(p.getSecond(), a);
});
importer.importGraph(graph, new StringReader(input));

//Create a new graph, thereby creating String vertices equal to the ID attribute values
Graph<String,DefaultEdge> labeledGraph=new SimpleDirectedGraph<>(DefaultEdge.class);
for(String v : graph.vertexSet())
    labeledGraph.addVertex(attrs.get(v).get("ID").getValue());
for(DefaultEdge e : graph.edgeSet()){
    String source = graph.getEdgeSource(e);
    String target = graph.getEdgeTarget(e);
    String sourceID=attrs.get(source).get("ID").getValue();
    String targetID=attrs.get(target).get("ID").getValue();
    labeledGraph.addEdge(sourceID, targetID);
}

System.out.println(labeledGraph);