/*
    * 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.giraph.worker;
  
  import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
  import org.apache.giraph.graph.VertexEdgeCount;
  import org.apache.giraph.io.MappingInputFormat;
  import org.apache.giraph.utils.CallableFactory;
  import org.apache.hadoop.io.Writable;
  import org.apache.hadoop.io.WritableComparable;
  import org.apache.hadoop.mapreduce.Mapper;
  
  /**
   * Factory for {@link org.apache.giraph.worker.MappingInputSplitsCallable}s.
   *
   * @param <I> vertexId type
   * @param <V> vertexValue type
   * @param <E> edgeValue type
   * @param <B> mappingTarget type
   */
  public class MappingInputSplitsCallableFactory<I extends WritableComparable,
    V extends Writable, E extends Writable, B extends Writable>
    implements CallableFactory<VertexEdgeCount> {
    /** Mapping input format */
    private final MappingInputFormat<I, V, E, B> mappingInputFormat;
    /** Mapper context. */
    private final Mapper<?, ?, ?, ?>.Context context;
    /** Configuration. */
    private final ImmutableClassesGiraphConfiguration<I, V, E> configuration;
    /** {@link BspServiceWorker} we're running on. */
    private final BspServiceWorker<I, V, E> bspServiceWorker;
    /** Handler for input splits */
    private final WorkerInputSplitsHandler splitsHandler;
  
    /**
     * Constructor.
     *
     * @param mappingInputFormat Mapping input format
     * @param context Mapper context
     * @param configuration Configuration
     * @param bspServiceWorker Calling {@link BspServiceWorker}
     * @param splitsHandler Splits handler
     */
    public MappingInputSplitsCallableFactory(
        MappingInputFormat<I, V, E, B> mappingInputFormat,
        Mapper<?, ?, ?, ?>.Context context,
        ImmutableClassesGiraphConfiguration<I, V, E> configuration,
        BspServiceWorker<I, V, E> bspServiceWorker,
        WorkerInputSplitsHandler splitsHandler) {
      this.mappingInputFormat = mappingInputFormat;
      this.context = context;
      this.configuration = configuration;
      this.bspServiceWorker = bspServiceWorker;
      this.splitsHandler = splitsHandler;
    }
  
    @Override
    public InputSplitsCallable<I, V, E> newCallable(int threadId) {
      return new MappingInputSplitsCallable<>(
          mappingInputFormat,
          context,
          configuration,
          bspServiceWorker,
          splitsHandler);
    }
  }