/*
    * 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.block_app.framework.piece.global_comm.internal;
  
  import org.apache.giraph.block_app.framework.api.BlockMasterApi;
  import org.apache.giraph.block_app.framework.api.CreateReducersApi;
  import org.apache.giraph.block_app.framework.piece.global_comm.ReducerHandle;
  import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
  import org.apache.giraph.reducers.ReduceOperation;
  import org.apache.hadoop.io.Writable;
  
  /**
   * Wrapping masterApi and reducers handler into API for creating reducer
   * handles.
   */
  public class CreateReducersApiWrapper implements CreateReducersApi {
    private final BlockMasterApi masterApi;
    private final ReducersForPieceHandler reducersApi;
  
    public CreateReducersApiWrapper(
        BlockMasterApi masterApi, ReducersForPieceHandler reducersApi) {
      this.masterApi = masterApi;
      this.reducersApi = reducersApi;
    }
  
    @Override
    public <S, R extends Writable> ReducerHandle<S, R> createLocalReducer(
        ReduceOperation<S, R> reduceOp) {
      return reducersApi.createLocalReducer(
          masterApi, reduceOp, reduceOp.createInitialValue());
    }
  
    @Override
    public <S, R extends Writable> ReducerHandle<S, R> createLocalReducer(
        ReduceOperation<S, R> reduceOp, R globalInitialValue) {
      return reducersApi.createLocalReducer(
          masterApi, reduceOp, globalInitialValue);
    }
  
    @Override
    public <S, R extends Writable> ReducerHandle<S, R> createGlobalReducer(
        ReduceOperation<S, R> reduceOp) {
      return reducersApi.createGlobalReducer(
          masterApi, reduceOp, reduceOp.createInitialValue());
    }
  
    @Override
    public <S, R extends Writable> ReducerHandle<S, R> createGlobalReducer(
        ReduceOperation<S, R> reduceOp, R globalInitialValue) {
      return reducersApi.createGlobalReducer(
          masterApi, reduceOp, globalInitialValue);
    }
  
    @Override
    public ImmutableClassesGiraphConfiguration<?, ?, ?> getConf() {
      return masterApi.getConf();
    }
  }