nl.tudelft.graphalytics.giraph.algorithms.lcc.LocalClusteringCoefficientComputationTest.java Source code

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Here is the source code for nl.tudelft.graphalytics.giraph.algorithms.lcc.LocalClusteringCoefficientComputationTest.java

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/*
 * Copyright 2015 Delft University of Technology
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package nl.tudelft.graphalytics.giraph.algorithms.lcc;

import nl.tudelft.graphalytics.giraph.GiraphTestGraphLoader;
import nl.tudelft.graphalytics.validation.GraphStructure;
import nl.tudelft.graphalytics.validation.algorithms.lcc.LocalClusteringCoefficientOutput;
import nl.tudelft.graphalytics.validation.algorithms.lcc.LocalClusteringCoefficientValidationTest;
import org.apache.giraph.conf.GiraphConfiguration;
import org.apache.giraph.graph.Computation;
import org.apache.giraph.graph.Vertex;
import org.apache.giraph.utils.InternalVertexRunner;
import org.apache.giraph.utils.TestGraph;
import org.apache.hadoop.io.DoubleWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;

import java.util.HashMap;
import java.util.Map;

/**
 * Test class for computing the local clustering coefficient. Executes the Giraph implementation of the LCC computation
 * on a small graph, and verifies that the output of the computation matches the expected results.
 *
 * @author Tim Hegeman
 */
public class LocalClusteringCoefficientComputationTest extends LocalClusteringCoefficientValidationTest {

    private static LocalClusteringCoefficientOutput executeLocalClusteringCoefficient(
            Class<? extends Computation> computationClass, GraphStructure graph) throws Exception {
        GiraphConfiguration configuration = new GiraphConfiguration();
        configuration.setComputationClass(computationClass);

        TestGraph<LongWritable, DoubleWritable, NullWritable> inputGraph = GiraphTestGraphLoader
                .createGraph(configuration, graph, new DoubleWritable(-1), NullWritable.get());

        TestGraph<LongWritable, DoubleWritable, NullWritable> result = InternalVertexRunner
                .runWithInMemoryOutput(configuration, inputGraph);

        Map<Long, Double> localClusteringCoefficients = new HashMap<>();
        for (Map.Entry<LongWritable, Vertex<LongWritable, DoubleWritable, NullWritable>> vertexEntry : result
                .getVertices().entrySet()) {
            localClusteringCoefficients.put(vertexEntry.getKey().get(), vertexEntry.getValue().getValue().get());
        }
        return new LocalClusteringCoefficientOutput(localClusteringCoefficients);
    }

    @Override
    public LocalClusteringCoefficientOutput executeDirectedLocalClusteringCoefficient(GraphStructure graph)
            throws Exception {
        return executeLocalClusteringCoefficient(DirectedLocalClusteringCoefficientComputation.class, graph);
    }

    @Override
    public LocalClusteringCoefficientOutput executeUndirectedLocalClusteringCoefficient(GraphStructure graph)
            throws Exception {
        return executeLocalClusteringCoefficient(UndirectedLocalClusteringCoefficientComputation.class, graph);
    }

}