URLMembershipCondition.cs source code in C# .NET

                        Code:
                         / FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / clr / src / BCL / System / Security / Policy / URLMembershipCondition.cs / 2 / URLMembershipCondition.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

// 
//  UrlMembershipCondition.cs 
//
//  Implementation of membership condition for urls 
//

namespace System.Security.Policy {
    using System; 
    using System.Collections;
    using System.Globalization; 
    using System.Security; 
    using System.Security.Util;
 
    [Serializable]
    [System.Runtime.InteropServices.ComVisible(true)]
    sealed public class UrlMembershipCondition : IMembershipCondition, IConstantMembershipCondition, IReportMatchMembershipCondition
    { 
        //------------------------------------------------------
        // 
        // PRIVATE STATE DATA 
        //
        //----------------------------------------------------- 

        private URLString m_url;
        private SecurityElement m_element;
 
        //-----------------------------------------------------
        // 
        // PUBLIC CONSTRUCTORS 
        //
        //----------------------------------------------------- 

        internal UrlMembershipCondition()
        {
            m_url = null; 
        }
 
        public UrlMembershipCondition( String url ) 
        {
            if (url == null) 
                throw new ArgumentNullException( "url" );

            // Parse the Url to
            m_url = new URLString(url, false /* not parsed */, true /* parse eagerly */); 
        }
 
        //------------------------------------------------------ 
        //
        // PUBLIC ACCESSOR METHODS 
        //
        //-----------------------------------------------------

        public String Url 
        {
            set 
            { 
                if (value == null)
                    throw new ArgumentNullException("value"); 

                m_url = new URLString( value );
            }
 
            get
            { 
                if (m_url == null && m_element != null) 
                    ParseURL();
 
                return m_url.ToString();
            }
        }
 
        //------------------------------------------------------
        // 
        // IMEMBERSHIPCONDITION IMPLEMENTATION 
        //
        //------------------------------------------------------ 

        public bool Check( Evidence evidence )
        {
            object usedEvidence = null; 
            return (this as IReportMatchMembershipCondition).Check(evidence, out usedEvidence);
        } 
 
        bool IReportMatchMembershipCondition.Check(Evidence evidence, out object usedEvidence)
        { 
            usedEvidence = null;

            if (evidence == null)
                return false; 

            IEnumerator enumerator = evidence.GetHostEnumerator(); 
            while (enumerator.MoveNext()) 
            {
                if (enumerator.Current is Url) 
                {
                    if (m_url == null && m_element != null)
                        ParseURL();
 
                    if (((Url)enumerator.Current).GetURLString().IsSubsetOf( m_url ))
                    { 
                        usedEvidence = enumerator.Current; 
                        return true;
                    } 
                }
            }
            return false;
        } 

        public IMembershipCondition Copy() 
        { 
            if (m_url == null && m_element != null)
                ParseURL(); 

            UrlMembershipCondition mc = new UrlMembershipCondition();
            mc.m_url = new URLString( m_url.ToString() );
            return mc; 
        }
 
        public SecurityElement ToXml() 
        {
            return ToXml( null ); 
        }

        public void FromXml( SecurityElement e )
        { 
            FromXml( e, null );
        } 
 
        public SecurityElement ToXml( PolicyLevel level )
        { 
            if (m_url == null && m_element != null)
                ParseURL();

            SecurityElement root = new SecurityElement( "IMembershipCondition" ); 
            System.Security.Util.XMLUtil.AddClassAttribute( root, this.GetType(), "System.Security.Policy.UrlMembershipCondition" );
            // If you hit this assertt then most likely you are trying to change the name of this class. 
            // This is ok as long as you change the hard coded string above and change the assertt below. 
            BCLDebug.Assert( this.GetType().FullName.Equals( "System.Security.Policy.UrlMembershipCondition" ), "Class name changed!" );
 
            root.AddAttribute( "version", "1" );
            if (m_url != null)
                root.AddAttribute( "Url", m_url.ToString() );
 
            return root;
        } 
 
        public void FromXml( SecurityElement e, PolicyLevel level )
        { 
            if (e == null)
                throw new ArgumentNullException("e");

            if (!e.Tag.Equals( "IMembershipCondition" )) 
            {
                throw new ArgumentException( Environment.GetResourceString( "Argument_MembershipConditionElement" ) ); 
            } 

            lock (this) 
            {
                m_element = e;
                m_url = null;
            } 
        }
 
        private void ParseURL() 
        {
            lock (this) 
            {
                if (m_element == null)
                    return;
 
                String elurl = m_element.Attribute( "Url" );
                if (elurl == null) 
                    throw new ArgumentException( Environment.GetResourceString( "Argument_UrlCannotBeNull" ) ); 
                else
                    m_url = new URLString( elurl ); 

                m_element = null;
            }
        } 

        public override bool Equals( Object o ) 
        { 
            UrlMembershipCondition that = (o as UrlMembershipCondition);
 
            if (that != null)
            {
                if (this.m_url == null && this.m_element != null)
                    this.ParseURL(); 
                if (that.m_url == null && that.m_element != null)
                    that.ParseURL(); 
 
                if (Equals( this.m_url, that.m_url ))
                { 
                    return true;
                }
            }
            return false; 
        }
 
        public override int GetHashCode() 
        {
            if (m_url == null && m_element != null) 
                ParseURL();

            if (m_url != null)
            { 
                return m_url.GetHashCode();
            } 
            else 
            {
                return typeof( UrlMembershipCondition ).GetHashCode(); 
            }
        }

        public override String ToString() 
        {
            if (m_url == null && m_element != null) 
                ParseURL(); 

            if (m_url != null) 
                return String.Format( CultureInfo.CurrentCulture, Environment.GetResourceString( "Url_ToStringArg" ), m_url.ToString() );
            else
                return Environment.GetResourceString( "Url_ToString" );
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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URLMembershipCondition.cs source code in C# .NET

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