URLMembershipCondition.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Policy / URLMembershipCondition.cs / 1305376 / 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;
    using System.Diagnostics.Contracts;

    [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" ); 
            Contract.EndContractBlock();
 
            // Parse the Url to check that it's valid. 
            m_url = new URLString(url, false /* not parsed */, true /* parse eagerly */);
 
            if (m_url.IsRelativeFileUrl)
                throw new ArgumentException(Environment.GetResourceString("Argument_RelativeUrlMembershipCondition"), "url");
        }
 
        //------------------------------------------------------
        // 
        // PUBLIC ACCESSOR METHODS 
        //
        //----------------------------------------------------- 

        public String Url
        {
            set 
            {
                if (value == null) 
                    throw new ArgumentNullException("value"); 
                Contract.EndContractBlock();
 
                URLString url = new URLString(value);
                if (url.IsRelativeFileUrl)
                    throw new ArgumentException(Environment.GetResourceString("Argument_RelativeUrlMembershipCondition"), "value");
 
                m_url = url;
            } 
 
            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; 

            Url url = evidence.GetHostEvidence(); 
            if (url != null)
            {
                if (m_url == null && m_element != null)
                { 
                    ParseURL();
                } 
 
                if (url.GetURLString().IsSubsetOf(m_url))
                { 
                    usedEvidence = url;
                    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 assert 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 assert below.
            Contract.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" ) ); 
            }
            Contract.EndContractBlock();

            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
                { 
                    URLString url = new URLString(elurl); 
                    if (url.IsRelativeFileUrl)
                        throw new ArgumentException(Environment.GetResourceString("Argument_RelativeUrlMembershipCondition")); 

                    m_url = url;
                }
 
                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.
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URLMembershipCondition.cs source code in C# .NET

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