org.apache.flink.graph.scala.NeighborsFunction.scala Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.flink.graph.scala

import org.apache.flink.api.java.tuple.Tuple3
import org.apache.flink.graph.{Edge, Vertex}
import org.apache.flink.util.Collector


abstract class NeighborsFunction[K, VV, EV, T] extends org.apache.flink.graph
.NeighborsFunction[K, VV, EV, T] {

  def iterateNeighbors(neighbors: Iterable[(K, Edge[K, EV], Vertex[K, VV])], out: Collector[T])

  override def iterateNeighbors(neighbors: java.lang.Iterable[Tuple3[K, Edge[K, EV], Vertex[K,
    VV]]], out: Collector[T]) = {
    val scalaIterable = scala.collection.JavaConversions.iterableAsScalaIterable(neighbors)
      .map(jtuple => (jtuple.f0, jtuple.f1, jtuple.f2))
    iterateNeighbors(scalaIterable, out)
  }
}