/Source/ResourceManagement.ObjectModel/RmReference.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;



namespace Microsoft.ResourceManagement.ObjectModel

{

    public class RmReference : IComparable, IComparable<RmReference>

    {

        Guid guidValue;

        String stringValue;

        public RmReference()

        {

            this.Value = String.Empty;

        }

        public RmReference(String value)

        {

            this.Value = value;

        }



        static String RemoveReference(String input)

        {

            if (String.IsNullOrEmpty(input))

                return Guid.Empty.ToString();

            else

                return input.Replace(@"urn:uuid:", String.Empty);

        }



        static String AddReference(String input)

        {

            if (String.IsNullOrEmpty(input))

                return null;

            else

                //return String.Format(@"urn:uuid:{0}", this.value.ToString());

                return input;

        }



        public String Value

        {

            get

            {

                return this.stringValue;

            }

            set

            {

                try

                {

                    this.guidValue = new Guid(RmReference.RemoveReference(value));

                    this.stringValue = RmReference.AddReference(this.guidValue.ToString());

                }

                catch (FormatException)

                {

                    throw new ArgumentException("The provided value did not match the reference format of urn:uuid:{guid}");

                }

            }

        }



        public override string ToString()

        {

            return this.stringValue ;

        }



        public override bool Equals(object obj)

        {

            RmReference other = obj as RmReference;

            if (other as Object == null || other.guidValue == null)

                return false;

            else

                return other.guidValue.Equals(this.guidValue);

        }

        public override int GetHashCode()

        {

            return this.guidValue.GetHashCode();

        }



        #region IComparable Members



        public int CompareTo(object obj)

        {

            if (obj as Object == null)

                throw new ArgumentNullException("obj");

            RmReference reference = obj as RmReference;

            if(reference as Object == null)

                throw new ArgumentNullException("obj");

            return this.CompareTo(reference);

        }



        public static bool operator ==(RmReference attrib1, RmReference attrib2)

        {

            if (attrib1 as Object == null)

                return false;

            if (attrib2 as Object == null)

                return false;

            return attrib1.CompareTo(attrib2) == 0;

        }



        public static bool operator !=(RmReference attrib1, RmReference attrib2)

        {

            if (attrib1 == null)

                return false;

            return attrib1.CompareTo(attrib2) != 0;

        }



        public static bool operator <(RmReference attrib1, RmReference attrib2)

        {

            if (attrib1 == null)

                return false;

            return attrib1.CompareTo(attrib2) < 0;

        }



        public static bool operator >(RmReference attrib1, RmReference attrib2)

        {

            if (attrib1 == null)

                return false;

            return attrib1.CompareTo(attrib2) > 0;

        }



        public static bool operator <=(RmReference attrib1, RmReference attrib2)

        {

            if (attrib1 == null)

                return false;

            return attrib1.CompareTo(attrib2) <= 0;

        }



        public static bool operator >=(RmReference attrib1, RmReference attrib2)

        {

            if (attrib1 == null)

                return false;

            return attrib1.CompareTo(attrib2) >= 0;

        }



        #endregion



        #region IComparable<RmReference> Members



        public int CompareTo(RmReference other)

        {

            if (other as object == null)

                throw new ArgumentNullException("other");

            else

                return this.guidValue.CompareTo(other.guidValue);

        }



        #endregion

    }

}