How to use

GraphCsvReader

in

org.apache.flink.graph

/**
* Creates a graph from a CSV file of edges. Vertices will be created automatically.
*
* @param edgesPath a path to a CSV file with the Edges data
* @param context the execution environment.
* @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
* on which calling methods to specify types of the Vertex ID, Vertex value and Edge value returns a Graph.
*
* @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
*/
public static GraphCsvReader fromCsvReader(String edgesPath, ExecutionEnvironment context) {
  return new GraphCsvReader(edgesPath, context);
}

@Override
public Graph<K, NullValue, NullValue> create(ExecutionEnvironment env) throws Exception {
  GraphCsvReader reader = Graph.fromCsvReader(inputFilename.getValue(), env)
    .ignoreCommentsEdges(commentPrefix.getValue())
    .lineDelimiterEdges(lineDelimiter.getValue())
    .fieldDelimiterEdges(fieldDelimiter.getValue());
    case INTEGER:
      graph = (Graph<K, NullValue, NullValue>) reader
        .keyType(IntValue.class);
      break;
        .keyType(LongValue.class);
      break;
        .keyType(StringValue.class);
      break;

private static Graph<Long, Double, Double> getGraph(ExecutionEnvironment env) {
  if (fileOutput) {
    return Graph.fromCsvReader(verticesInputPath, edgesInputPath, env).lineDelimiterEdges("\n")
        .types(Long.class, Double.class, Double.class);
  } else {
    return Graph.fromDataSet(IncrementalSSSPData.getDefaultVertexDataSet(env), IncrementalSSSPData.getDefaultEdgeDataSet(env), env);
  }
}

/**
* Creates a Graph from a CSV file of vertices and a CSV file of edges.
*
* @param verticesPath path to a CSV file with the Vertex data.
* @param edgesPath path to a CSV file with the Edge data
* @param context the Flink execution environment.
* @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
* on which calling methods to specify types of the Vertex ID, Vertex value and Edge value returns a Graph.
*
* @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
*/
public static GraphCsvReader fromCsvReader(String verticesPath, String edgesPath, ExecutionEnvironment context) {
  return new GraphCsvReader(verticesPath, edgesPath, context);
}

private static Graph<Long, Double, Double> getSSSPGraph(ExecutionEnvironment env) {
  if (fileOutput) {
    return Graph.fromCsvReader(verticesInputPath, edgesInSSSPInputPath, env).lineDelimiterEdges("\n")
        .types(Long.class, Double.class, Double.class);
  } else {
    return Graph.fromDataSet(IncrementalSSSPData.getDefaultVertexDataSet(env), IncrementalSSSPData.getDefaultEdgesInSSSP(env), env);
  }
}

/**
 * Creates a graph from a CSV file of edges. Vertices will be created automatically and
 * Vertex values can be initialized using a user-defined mapper.
 *
 * @param edgesPath a path to a CSV file with the Edge data
 * @param vertexValueInitializer the mapper function that initializes the vertex values.
 * It allows to apply a map transformation on the vertex ID to produce an initial vertex value.
 * @param context the execution environment.
 * @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
 * on which calling methods to specify types of the Vertex ID, Vertex Value and Edge value returns a Graph.
 *
 * @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
 */
public static <K, VV> GraphCsvReader fromCsvReader(String edgesPath,
    final MapFunction<K, VV> vertexValueInitializer, ExecutionEnvironment context) {
  return new GraphCsvReader(edgesPath, vertexValueInitializer, context);
}

/**
* Creates a graph from a CSV file of edges. Vertices will be created automatically.
*
* @param edgesPath a path to a CSV file with the Edges data
* @param context the execution environment.
* @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
* on which calling methods to specify types of the Vertex ID, Vertex value and Edge value returns a Graph.
*
* @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
*/
public static GraphCsvReader fromCsvReader(String edgesPath, ExecutionEnvironment context) {
  return new GraphCsvReader(edgesPath, context);
}

/**
* Creates a Graph from a CSV file of vertices and a CSV file of edges.
* 
* @param verticesPath path to a CSV file with the Vertex data.
* @param edgesPath path to a CSV file with the Edge data
* @param context the Flink execution environment.
* @return An instance of {@link org.apache.flink.graph.GraphCsvReader}, 
* on which calling methods to specify types of the Vertex ID, Vertex value and Edge value returns a Graph.
* 
* @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
*/
public static GraphCsvReader fromCsvReader(String verticesPath, String edgesPath, ExecutionEnvironment context) {
  return new GraphCsvReader(verticesPath, edgesPath, context);
}

/** 
* Creates a graph from a CSV file of edges. Vertices will be created automatically.
*
* @param edgesPath a path to a CSV file with the Edges data
* @param context the execution environment.
* @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
* on which calling methods to specify types of the Vertex ID, Vertex value and Edge value returns a Graph.
* 
* @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
*/
public static GraphCsvReader fromCsvReader(String edgesPath, ExecutionEnvironment context) {
  return new GraphCsvReader(edgesPath, context);
}

/**
* Creates a graph from a CSV file of edges. Vertices will be created automatically.
*
* @param edgesPath a path to a CSV file with the Edges data
* @param context the execution environment.
* @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
* on which calling methods to specify types of the Vertex ID, Vertex value and Edge value returns a Graph.
*
* @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
*/
public static GraphCsvReader fromCsvReader(String edgesPath, ExecutionEnvironment context) {
  return new GraphCsvReader(edgesPath, context);
}

/**
* Creates a Graph from a CSV file of vertices and a CSV file of edges.
*
* @param verticesPath path to a CSV file with the Vertex data.
* @param edgesPath path to a CSV file with the Edge data
* @param context the Flink execution environment.
* @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
* on which calling methods to specify types of the Vertex ID, Vertex value and Edge value returns a Graph.
*
* @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
*/
public static GraphCsvReader fromCsvReader(String verticesPath, String edgesPath, ExecutionEnvironment context) {
  return new GraphCsvReader(verticesPath, edgesPath, context);
}

/**
* Creates a Graph from a CSV file of vertices and a CSV file of edges.
*
* @param verticesPath path to a CSV file with the Vertex data.
* @param edgesPath path to a CSV file with the Edge data
* @param context the Flink execution environment.
* @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
* on which calling methods to specify types of the Vertex ID, Vertex value and Edge value returns a Graph.
*
* @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
* @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
*/
public static GraphCsvReader fromCsvReader(String verticesPath, String edgesPath, ExecutionEnvironment context) {
  return new GraphCsvReader(verticesPath, edgesPath, context);
}

/**
 * Creates a graph from a CSV file of edges. Vertices will be created automatically and
 * Vertex values can be initialized using a user-defined mapper.
 *
 * @param edgesPath a path to a CSV file with the Edge data
 * @param vertexValueInitializer the mapper function that initializes the vertex values.
 * It allows to apply a map transformation on the vertex ID to produce an initial vertex value.
 * @param context the execution environment.
 * @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
 * on which calling methods to specify types of the Vertex ID, Vertex Value and Edge value returns a Graph.
 *
 * @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
 */
public static <K, VV> GraphCsvReader fromCsvReader(String edgesPath,
    final MapFunction<K, VV> vertexValueInitializer, ExecutionEnvironment context) {
  return new GraphCsvReader(edgesPath, vertexValueInitializer, context);
}

/** 
 * Creates a graph from a CSV file of edges. Vertices will be created automatically and
 * Vertex values can be initialized using a user-defined mapper.
 *
 * @param edgesPath a path to a CSV file with the Edge data
 * @param vertexValueInitializer the mapper function that initializes the vertex values.
 * It allows to apply a map transformation on the vertex ID to produce an initial vertex value.
 * @param context the execution environment.
 * @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
 * on which calling methods to specify types of the Vertex ID, Vertex Value and Edge value returns a Graph.
 * 
 * @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
 */
public static <K, VV> GraphCsvReader fromCsvReader(String edgesPath,
    final MapFunction<K, VV> vertexValueInitializer, ExecutionEnvironment context) {
  return new GraphCsvReader(edgesPath, vertexValueInitializer, context);
}

/**
 * Creates a graph from a CSV file of edges. Vertices will be created automatically and
 * Vertex values can be initialized using a user-defined mapper.
 *
 * @param edgesPath a path to a CSV file with the Edge data
 * @param vertexValueInitializer the mapper function that initializes the vertex values.
 * It allows to apply a map transformation on the vertex ID to produce an initial vertex value.
 * @param context the execution environment.
 * @return An instance of {@link org.apache.flink.graph.GraphCsvReader},
 * on which calling methods to specify types of the Vertex ID, Vertex Value and Edge value returns a Graph.
 *
 * @see org.apache.flink.graph.GraphCsvReader#types(Class, Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#vertexTypes(Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#edgeTypes(Class, Class)
 * @see org.apache.flink.graph.GraphCsvReader#keyType(Class)
 */
public static <K, VV> GraphCsvReader fromCsvReader(String edgesPath,
    final MapFunction<K, VV> vertexValueInitializer, ExecutionEnvironment context) {
  return new GraphCsvReader(edgesPath, vertexValueInitializer, context);
}