﻿// 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.

using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;

namespace Org.Apache.REEF.Examples.MachineLearning.KMeans.Contracts
{
    [DataContract]
    public class CentroidsContract
    {
        [DataMember]
        public List<DataVectorContract> DataVectorContracts { get; set; }

        public static CentroidsContract Create(Centroids centroids)
        {
            List<DataVectorContract> dataVectorContracts = 
                centroids.Points.Select(DataVectorContract.Create).ToList();

            return new CentroidsContract { DataVectorContracts = dataVectorContracts };
        }

        public Centroids ToCentroids()
        {
            List<DataVector> dataVectors = DataVectorContracts
                .Select(dv => dv.ToDataVector())
                .ToList();

            return new Centroids(dataVectors);
        }
    }
}