PersistentObject.cs

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// 
// Copyright (c) 2013-2017 Carsten Sonne Larsen <cs@innolan.net>
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

namespace Ntp.Analyzer.Objects
{
    public abstract class PersistentObject
    {
        protected PersistentObject(int id)
        {
            Id = id;
            NewObject = false;
        }

        protected PersistentObject()
        {
            Id = -1;
            NewObject = true;
        }

        public int Id { get; private set; }

        public bool NewObject { get; protected set; }

        public override bool Equals(object obj)
        {
            if (obj == null)
                return false;

            if (obj.GetType() != GetType())
                return false;

            return NewObject
                // ReSharper disable once BaseObjectEqualsIsObjectEquals
                ? base.Equals(obj)
                : Id == ((PersistentObject) obj).Id;
        }

        public override int GetHashCode()
        {
            // ReSharper disable once NonReadonlyMemberInGetHashCode
            return NewObject
                // ReSharper disable once BaseObjectGetHashCodeCallInGetHashCode
                ? base.GetHashCode()
                // ReSharper disable once NonReadonlyMemberInGetHashCode
                : (int) (Id*2654435761%2 ^ 32);
        }

        public void SetId(int id)
        {
            Id = id;
            NewObject = false;
        }

        public override string ToString()
        {
            return $"[PersistentObject: Id={Id}, NewObject={NewObject}]";
        }
    }
}