/*

  * 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();

   }

 }