﻿#region License

// -------------------------------------------------------------------------------
//  <copyright file="Transition.cs" company="PVM.NET Project Contributors">
//    Copyright (c) 2015 PVM.NET Project Contributors
//    Authors: Dominik Schlosser (dominik.schlosser@gmail.com)
//            
//    Licensed 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.
//  </copyright>
// -------------------------------------------------------------------------------

#endregion

namespace PVM.Core.Definition
{
    public class Transition
    {
        public Transition(string identifier, bool isDefault, INode source, INode destination)
        {
            IsDefault = isDefault;
            Source = source;
            Destination = destination;
            Identifier = identifier;
        }

        public INode Source { get; private set; }
        public INode Destination { get; private set; }
        public string Identifier { get; private set; }
        public bool IsDefault { get; private set; }

        protected bool Equals(Transition other)
        {
            return string.Equals(Identifier, other.Identifier);
        }

        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            if (obj.GetType() != GetType()) return false;
            return Equals((Transition) obj);
        }

        public override int GetHashCode()
        {
            return (Identifier != null ? Identifier.GetHashCode() : 0);
        }
    }
}