Example usage for org.apache.commons.collections15 TransformerUtils nopTransformer

Introduction

In this page you can find the example usage for org.apache.commons.collections15 TransformerUtils nopTransformer.

Prototype

public static Transformer nopTransformer() 

Source Link

Document

Gets a transformer that returns the input object.

Usage

From source file:edu.uci.ics.jung.io.TestGraphMLWriter.java

@SuppressWarnings("unchecked")
public void testBasicWrite() throws IOException, ParserConfigurationException, SAXException {
    Graph<String, Number> g = TestGraphs.createTestGraph(true);
    GraphMLWriter<String, Number> gmlw = new GraphMLWriter<String, Number>();
    Transformer<Number, String> edge_weight = new Transformer<Number, String>() {
        public String transform(Number n) {
            return String.valueOf(n.intValue());
        }//  www.  ja  v  a 2s. co  m
    };

    Transformer<String, String> vertex_name = TransformerUtils.nopTransformer();

    gmlw.addEdgeData("weight", "integer value for the edge", Integer.toString(-1), edge_weight);
    gmlw.addVertexData("name", "identifier for the vertex", null, vertex_name);
    gmlw.setEdgeIDs(edge_weight);
    gmlw.setVertexIDs(vertex_name);
    gmlw.save(g, new FileWriter("src/test/resources/testbasicwrite.graphml"));

    // TODO: now read it back in and compare the graph connectivity 
    // and other metadata with what's in TestGraphs.pairs[], etc.
    //        Factory<String> vertex_factory = null;
    //        Factory<Object> edge_factory = FactoryUtils.instantiateFactory(Object.class);
    //        GraphMLReader<Graph<String, Object>, String, Object> gmlr = 
    //           new GraphMLReader<Graph<String, Object>, String, Object>(
    //                 vertex_factory, edge_factory);
    GraphMLReader<Graph<String, Object>, String, Object> gmlr = new GraphMLReader<Graph<String, Object>, String, Object>();
    Graph<String, Object> g2 = new DirectedSparseGraph<String, Object>();
    gmlr.load("src/test/resources/testbasicwrite.graphml", g2);
    Map<String, GraphMLMetadata<Object>> edge_metadata = gmlr.getEdgeMetadata();
    Transformer<Object, String> edge_weight2 = edge_metadata.get("weight").transformer;
    validateTopology(g, g2, edge_weight, edge_weight2);

    // TODO: delete graph file when done
    File f = new File("src/test/resources/testbasicwrite.graphml");
    f.delete();
}

---

From source file:org.inria.myriads.snoozeclient.systemtree.util.DumpUtil.java

/**
 * Writes a graph to file in GraphML format.
 * //from w  w  w.  j a va2  s .c o m
 * @param graph         The graph
 * @param fileName      The file name
 * @throws IOException  The exception
 */
@SuppressWarnings("unchecked")
public static void writeGraph(Forest<SnoozeVertex, Integer> graph, String fileName) throws IOException {
    Guard.check(graph, fileName);
    log_.debug("Writing graph in GraphML format to disk");

    Transformer<SnoozeVertex, String> vertexData = TransformerUtils.nopTransformer();
    GraphMLWriter<SnoozeVertex, Integer> graphWriter = new GraphMLWriter<SnoozeVertex, Integer>();
    graphWriter.addVertexData("data", null, null, vertexData);

    Transformer<SnoozeVertex, String> vertexId = new Transformer<SnoozeVertex, String>() {
        public String transform(SnoozeVertex vertex) {
            return String.valueOf(vertex.getNodeType());
        }
    };
    graphWriter.setVertexIDs(vertexId);

    PrintWriter printWriter = new PrintWriter(new BufferedWriter(new FileWriter(fileName)));
    graphWriter.save(graph, printWriter);
}

---