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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.IdentityModel.Claims
{
using System.Collections;
using System.Collections.Generic;
using System.Runtime.Serialization;
using System.Security.Principal;
using System.Text;
[DataContract(Namespace = XsiConstants.Namespace)]
public abstract class ClaimSet : IEnumerable<Claim>
{
static ClaimSet system;
static ClaimSet windows;
static ClaimSet anonymous;
public static ClaimSet System
{
get
{
if (system == null)
{
List<Claim> claims = new List<Claim>(2);
claims.Add(Claim.System);
claims.Add(new Claim(ClaimTypes.System, XsiConstants.System, Rights.PossessProperty));
system = new DefaultClaimSet(claims);
}
return system;
}
}
public static ClaimSet Windows
{
get
{
if (windows == null)
{
List<Claim> claims = new List<Claim>(2);
SecurityIdentifier sid = new SecurityIdentifier(WellKnownSidType.NTAuthoritySid, null);
claims.Add(new Claim(ClaimTypes.Sid, sid, Rights.Identity));
claims.Add(Claim.CreateWindowsSidClaim(sid));
windows = new DefaultClaimSet(claims);
}
return windows;
}
}
internal static ClaimSet Anonymous
{
get
{
if (anonymous == null)
anonymous = new DefaultClaimSet();
return anonymous;
}
}
static internal bool SupportedRight(string right)
{
return right == null ||
Rights.Identity.Equals(right) ||
Rights.PossessProperty.Equals(right);
}
public virtual bool ContainsClaim(Claim claim, IEqualityComparer<Claim> comparer)
{
if (claim == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("claim");
if (comparer == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("comparer");
IEnumerable<Claim> claims = FindClaims(null, null);
if (claims != null)
{
foreach (Claim matchingClaim in claims)
{
if (comparer.Equals(claim, matchingClaim))
return true;
}
}
return false;
}
public virtual bool ContainsClaim(Claim claim)
{
if (claim == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("claim");
IEnumerable<Claim> claims = FindClaims(claim.ClaimType, claim.Right);
if (claims != null)
{
foreach (Claim matchingClaim in claims)
{
if (claim.Equals(matchingClaim))
return true;
}
}
return false;
}
public abstract Claim this[int index] { get; }
public abstract int Count { get; }
public abstract ClaimSet Issuer { get; }
// Note: null string represents any.
public abstract IEnumerable<Claim> FindClaims(string claimType, string right);
public abstract IEnumerator<Claim> GetEnumerator();
IEnumerator IEnumerable.GetEnumerator() { return this.GetEnumerator(); }
}
}
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