﻿// 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.Net;

namespace Org.Apache.REEF.Wake.Remote.Impl
{
    /// <summary>
    /// Class to compare two IPEndPoint objects.
    /// </summary>
    internal sealed class IPEndPointComparer : IEqualityComparer<IPEndPoint>
    {
        public bool Equals(IPEndPoint x, IPEndPoint y)
        {
            if (ReferenceEquals(x, y))
            {
                return true;
            }
            if (x == null || y == null)
            {
                return false;
            }

            // If either port is 0, don't check port
            if (x.Port == 0 || y.Port == 0)
            {
                return x.Address.Equals(y.Address);
            }

            return x.Equals(y);
        }

        public int GetHashCode(IPEndPoint obj)
        {
            return obj.Address.GetHashCode();
        }
    }
}