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// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
// UnionCodeGroup.cs
//
// <OWNER>Microsoft</OWNER>
//
// 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;
using System.Diagnostics.Contracts;
[Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
[Obsolete("This type is obsolete and will be removed in a future release of the .NET Framework. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")]
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 )
{
}
[System.Security.SecuritySafeCritical] // auto-generated
public override PolicyStatement Resolve( Evidence evidence )
{
if (evidence == null)
throw new ArgumentNullException("evidence");
Contract.EndContractBlock();
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;
}
}
/// <internalonly/>
PolicyStatement IUnionSemanticCodeGroup.InternalResolve( Evidence evidence )
{
if (evidence == null)
throw new ArgumentNullException("evidence");
Contract.EndContractBlock();
if (this.MembershipCondition.Check( evidence ))
{
return this.PolicyStatement;
}
else
{
return null;
}
}
public override CodeGroup ResolveMatchingCodeGroups( Evidence evidence )
{
if (evidence == null)
throw new ArgumentNullException("evidence");
Contract.EndContractBlock();
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";
}
}
}
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