Re: [jgrapht-users] GraphMLExporter

[Mansour A. <man...@gm...>]

Hi Besenyei,

Thanks for your reply, but this is not what I was searching for. I wish to
have different data keys for each node :

<node id="1">
      <data key="name">node1</data>
      <data key="label">label1</data>
      <data key="type">type1</data>
</node>

Is there any way to have this ?

Thanks,
Mansour


On Thu, Jun 16, 2016 at 6:37 PM, Szabolcs Besenyei <bes...@gm...>
wrote:

> Hi,
>
> It is because you need to give a VertexNameProvider and an
> EdgeNameProvider to the constructor of the exporter.
> It seems you also need to define one pair of VertexNameProvider and
> EdgeNameProvider for each vertex/edge respectively.
> Here is a snippet on how to achieve such behaviour from the exporter:
>
> class GraphNode {
>>     String name;
>>     String label;
>>     String type;
>>
>>     public GraphNode(String name, String label, String type) {
>>         this.name = name;
>>         this.label = label;
>>         this.type = type;
>>     }
>>
>>     @Override
>>     public String toString() {
>>         return "GraphNode{" + "name=" + name + ", label=" + label + ",
>> type=" + type + '}';
>>     }
>> }
>>
>> public class Main {
>>
>>     public static void main(String[] args) throws IOException,
>> SAXException, TransformerConfigurationException {
>>         DefaultDirectedGraph<GraphNode, DefaultEdge> g =
>>                 new DefaultDirectedGraph<>(DefaultEdge.class);
>>         GraphNode node1 = new GraphNode("node1","label1","type1");
>>         GraphNode node2 = new GraphNode("node2","label2","type1");
>>
>>         g.addVertex(node1);
>>         g.addVertex(node2);
>>         g.addEdge(node1, node2);
>>
>>         VertexNameProvider<GraphNode> vLabelNameProvider = new
>> StringNameProvider<>();
>>         VertexNameProvider<GraphNode> vIdNameProvider = new
>> IntegerNameProvider<>();
>>
>>         EdgeNameProvider<DefaultEdge> eLabelNameProvider = new
>> StringEdgeNameProvider<>();
>>         EdgeNameProvider<DefaultEdge> eIdNameProvider = new
>> IntegerEdgeNameProvider<>();
>>
>>         GraphMLExporter<GraphNode, DefaultEdge> exporter
>>                 = new GraphMLExporter<>(vIdNameProvider,
>> vLabelNameProvider, eIdNameProvider, eLabelNameProvider);
>>
>>         FileWriter w = new FileWriter("output.txt");
>>         exporter.export(w, g);
>>     }
>>
>> }
>>
>
> And the result:
>
> <?xml version="1.0" encoding="UTF-8"?><graphml xmlns="
>> http://graphml.graphdrawing.org/xmlns" xsi:schemaLocation="
>> http://graphml.graphdrawing.org/xmlns
>> http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd" xmlns:xsi="
>> http://www.w3.org/2001/XMLSchema-instance">
>> <key id="vertex_label" for="node" attr.name="Vertex Label"
>> attr.type="string"/>
>> <key id="edge_label" for="edge" attr.name="Edge Label"
>> attr.type="string"/>
>> <graph edgedefault="directed">
>> <node id="1">
>> <data key="vertex_label">GraphNode{name=node1, label=label1,
>> type=type1}</data>
>> </node>
>> <node id="2">
>> <data key="vertex_label">GraphNode{name=node2, label=label2,
>> type=type1}</data>
>> </node>
>> <edge id="1" source="1" target="2">
>> <data key="edge_label"/>
>> </edge>
>> </graph>
>> </graphml>
>>
>
> Üdvözlettel,
>
> Besenyei Szabolcs
>
> 2016-06-16 16:55 GMT+02:00 Mansour Ahmadi <man...@gm...>:
>
>> Hi,
>>
>> I am trying to save a graph with custom nodes, but the export function
>> doesn't save the attributes of the graph nodes (it just saves an id for
>> each node).
>>
>> public class GraphNode {
>>     String name;
>>     String label;
>>     String type;
>> }
>>
>> GraphMLExporter<GraphNode, DefaultEdge> exporter =
>>                     new GraphMLExporter<GraphNode, DefaultEdge>();
>> w = new FileWriter(file);
>> exporter.export(w, this.g);
>>
>> Would you please help me how can I save all of the attributes of nodes?
>>
>> Thanks
>>
>>
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