// SNMP no such object exception type (v2 and above only).// Copyright (C) 2008-2010 Malcolm Crowe, Lex Li, and other contributors.// // 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. /* * Created by SharpDevelop. * User: lextm * Date: 2008/7/9 * Time: 20:20 *  * To change this template use Tools | Options | Coding | Edit Standard Headers. */using System;using System.IO; namespace GSF.Net.Snmp{    /// <summary>    /// NoSuchObject exception.    /// </summary>    public sealed class NoSuchObject : ISnmpData, IEquatable<NoSuchObject>    {        private readonly byte[] _length;         /// <summary>        /// Initializes a new instance of the <see cref="NoSuchObject"/> class.        /// </summary>        /// <param name="length">The length data.</param>        /// <param name="stream">The stream.</param>        public NoSuchObject(Tuple<int, byte[]> length, Stream stream)        {            if (length == null)            {                throw new ArgumentNullException(nameof(length));            }             if (stream == null)            {                throw new ArgumentNullException(nameof(stream));            }             stream.IgnoreBytes(length.Item1);            _length = length.Item2;        }         /// <summary>        /// Initializes a new instance of the <see cref="NoSuchObject"/> class.        /// </summary>        public NoSuchObject()        {        }         #region Equals and GetHashCode implementation        /// <summary>        /// Determines whether the specified <see cref="Object"/> is equal to the current <see cref="NoSuchObject"/>.        /// </summary>        /// <param name="obj">The <see cref="Object"/> to compare with the current <see cref="NoSuchObject"/>. </param>        /// <returns><value>true</value> if the specified <see cref="Object"/> is equal to the current <see cref="NoSuchObject"/>; otherwise, <value>false</value>.        /// </returns>        public override bool Equals(object obj)        {            return Equals(this, obj as NoSuchObject);        }                /// <summary>        /// Serves as a hash function for a particular type.        /// </summary>        /// <returns>A hash code for the current <see cref="NoSuchObject"/>.</returns>        public override int GetHashCode()        {            return 0;        }                /// <summary>        /// Indicates whether the current object is equal to another object of the same type.        /// </summary>        /// <param name="other">An object to compare with this object.</param>        /// <returns><value>true</value> if the current object is equal to the <paramref name="other"/> parameter; otherwise, <value>false</value>.        /// </returns>        public bool Equals(NoSuchObject other)        {            return Equals(this, other);        }                /// <summary>        /// The equality operator.        /// </summary>        /// <param name="left">Left <see cref="NoSuchObject"/> object</param>        /// <param name="right">Right <see cref="NoSuchObject"/> object</param>        /// <returns>        /// Returns <c>true</c> if the values of its operands are equal, <c>false</c> otherwise.</returns>        public static bool operator ==(NoSuchObject left, NoSuchObject right)        {            return Equals(left, right);        }                /// <summary>        /// The inequality operator.        /// </summary>        /// <param name="left">Left <see cref="NoSuchObject"/> object</param>        /// <param name="right">Right <see cref="NoSuchObject"/> object</param>        /// <returns>        /// Returns <c>true</c> if the values of its operands are not equal, <c>false</c> otherwise.</returns>        public static bool operator !=(NoSuchObject left, NoSuchObject right)        {            return !(left == right); // use operator == and negate result        }        #endregion        /// <summary>        /// Type code.        /// </summary>        public SnmpType TypeCode        {            get            {                return SnmpType.NoSuchObject;            }        }         /// <summary>        /// Appends the bytes to <see cref="Stream"/>.        /// </summary>        /// <param name="stream">The stream.</param>        public void AppendBytesTo(Stream stream)        {            if (stream == null)            {                throw new ArgumentNullException(nameof(stream));            }                        stream.AppendBytes(TypeCode, _length, new byte[0]);        }               /// <summary>        /// Returns a <see cref="String"/> that represents this <see cref="NoSuchObject"/>.        /// </summary>        /// <returns></returns>        public override string ToString()        {            return "NoSuchObject";        }                /// <summary>        /// The comparison.        /// </summary>        /// <param name="left">Left <see cref="NoSuchObject"/> object</param>        /// <param name="right">Right <see cref="NoSuchObject"/> object</param>        /// <returns>        /// Returns <c>true</c> if the values of its operands are not equal, <c>false</c> otherwise.</returns>        private static bool Equals(NoSuchObject left, NoSuchObject right)        {            object lo = left;            object ro = right;            if (lo == ro)            {                return true;            }             return lo != null && ro != null;        }    }}