UnionCodeGroup.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / clr / src / BCL / System / Security / Policy / UnionCodeGroup.cs / 2 / UnionCodeGroup.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
//  UnionCodeGroup.cs
// 
//  Representation for code groups used for the policy mechanism 
//
 
namespace System.Security.Policy {

    using System;
    using System.Security.Util; 
    using System.Security;
    using System.Collections; 
 
    [Serializable]
[System.Runtime.InteropServices.ComVisible(true)] 
    sealed public class UnionCodeGroup : CodeGroup, IUnionSemanticCodeGroup
    {
        internal UnionCodeGroup()
            : base() 
        {
        } 
 
        internal UnionCodeGroup( IMembershipCondition membershipCondition, PermissionSet permSet )
            : base( membershipCondition, permSet ) 
        {
        }

        public UnionCodeGroup( IMembershipCondition membershipCondition, PolicyStatement policy ) 
            : base( membershipCondition, policy )
        { 
        } 

 
        public override PolicyStatement Resolve( Evidence evidence )
        {
            if (evidence == null)
                throw new ArgumentNullException("evidence"); 

            object usedEvidence = null; 
            if (PolicyManager.CheckMembershipCondition(MembershipCondition, evidence, out usedEvidence)) 
            {
                PolicyStatement thisPolicy = PolicyStatement;   // PolicyStatement getter makes a copy for us 

                // If any delay-evidence was used to generate this grant set, then we need to keep track of
                // that for potentially later forcing it to be verified.
                IDelayEvaluatedEvidence delayEvidence = usedEvidence as IDelayEvaluatedEvidence; 
                bool delayEvidenceNeedsVerification = delayEvidence != null && !delayEvidence.IsVerified;
                if (delayEvidenceNeedsVerification) 
                { 
                    thisPolicy.AddDependentEvidence(delayEvidence);
                } 

                bool foundExclusiveChild = false;
                IEnumerator enumerator = this.Children.GetEnumerator();
                while (enumerator.MoveNext() && !foundExclusiveChild) 
                {
                    PolicyStatement childPolicy = PolicyManager.ResolveCodeGroup(enumerator.Current as CodeGroup, 
                                                                                 evidence); 

                    if (childPolicy != null) 
                    {
                        thisPolicy.InplaceUnion(childPolicy);

                        if ((childPolicy.Attributes & PolicyStatementAttribute.Exclusive) == PolicyStatementAttribute.Exclusive) 
                        {
                            foundExclusiveChild = true; 
                        } 
                    }
                } 

                return thisPolicy;
            }
            else 
            {
                return null; 
            } 
        }
 
        /// 
        PolicyStatement IUnionSemanticCodeGroup.InternalResolve( Evidence evidence )
        {
            if (evidence == null) 
                throw new ArgumentNullException("evidence");
 
            if (this.MembershipCondition.Check( evidence )) 
            {
                return this.PolicyStatement; 
            }
            else
            {
                return null; 
            }
        } 
 
        public override CodeGroup ResolveMatchingCodeGroups( Evidence evidence )
        { 
            if (evidence == null)
                throw new ArgumentNullException("evidence");

            if (this.MembershipCondition.Check( evidence )) 
            {
                CodeGroup retGroup = this.Copy(); 
 
                retGroup.Children = new ArrayList();
 
                IEnumerator enumerator = this.Children.GetEnumerator();

                while (enumerator.MoveNext())
                { 
                    CodeGroup matchingGroups = ((CodeGroup)enumerator.Current).ResolveMatchingCodeGroups( evidence );
 
                    // If the child has a policy, we are done. 

                    if (matchingGroups != null) 
                    {
                        retGroup.AddChild( matchingGroups );
                    }
                } 

                return retGroup; 
 
            }
            else 
            {
                return null;
            }
        } 

 
        public override CodeGroup Copy() 
        {
            UnionCodeGroup group = new UnionCodeGroup(); 

            group.MembershipCondition = this.MembershipCondition;
            group.PolicyStatement = this.PolicyStatement;
            group.Name = this.Name; 
            group.Description = this.Description;
 
            IEnumerator enumerator = this.Children.GetEnumerator(); 

            while (enumerator.MoveNext()) 
            {
                group.AddChild( (CodeGroup)enumerator.Current );
            }
 

            return group; 
        } 

        public override String MergeLogic 
        {
            get
            {
                return Environment.GetResourceString( "MergeLogic_Union" ); 
            }
        } 
 
        internal override String GetTypeName()
        { 
            return "System.Security.Policy.UnionCodeGroup";
        }
 
    } 

} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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