- Type Parameters:
V- the vertex type
E- the edge type
- All Implemented Interfaces:
public class GmlImporter<V,E> extends BaseEventDrivenImporter<V,E> implements GraphImporter<V,E>Imports a graph from a GML file (Graph Modeling Language).
For a description of the format see http://www.infosun.fmi.uni-passau.de/Graphlet/GML/.
Below is small example of a graph in GML format.
graph [ node [ id 1 ] node [ id 2 label "Node 2 has an optional label" ] node [ id 3 ] edge [ source 1 target 2 weight 2.0 label "Edge between 1 and 2" ] edge [ source 2 target 3 weight 3.0 label "Edge between 2 and 3" ] ]
In case the graph is weighted then the importer also reads edge weights. Otherwise edge weights are ignored. The importer also supports reading additional string attributes such as label or custom user attributes. String attributes are unescaped as if they are Java strings.
The parser completely ignores elements from the input that are not related to vertices or edges of the graph. Moreover, complicated nested structures are simply returned as a whole. For example, in the following graph
graph [ node [ id 1 ] node [ id 2 ] edge [ source 1 target 2 points [ x 1.0 y 2.0 ] ] ]the points attribute of the edge is returned as a string containing "[ x 1.0 y 2.0 ]".
- Dimitrios Michail
Constructors Constructor Description
GmlImporter()Constructs a new importer.
All Methods Instance Methods Concrete Methods Modifier and Type Method Description
importGraph(Graph<V,E> graph, Reader input)Import a graph.
Methods inherited from class org.jgrapht.nio.BaseEventDrivenImporter
addEdgeAttributeConsumer, addEdgeConsumer, addEdgeCountConsumer, addGraphAttributeConsumer, addImportEventConsumer, addVertexAttributeConsumer, addVertexConsumer, addVertexCountConsumer, notifyEdge, notifyEdgeAttribute, notifyEdgeCount, notifyGraphAttribute, notifyImportEvent, notifyVertex, notifyVertexAttribute, notifyVertexCount, removeEdgeAttributeConsumer, removeEdgeConsumer, removeEdgeCountConsumer, removeGraphAttributeConsumer, removeImportEventConsumer, removeVertexAttributeConsumer, removeVertexConsumer, removeVertexCountConsumer
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
importGraphImport a graph.
The provided graph must be able to support the features of the graph that is read. For example if the GML file contains self-loops then the graph provided must also support self-loops. The same for multiple edges.
If the provided graph is a weighted graph, the importer also reads edge weights. Otherwise edge weights are ignored.