mcs/class/corlib/System.Security.Policy/Evidence.cs

   1 //
   2 // System.Security.Policy.Evidence
   3 //
   4 // Authors:
   5 //      Sean MacIsaac (macisaac@ximian.com)
   6 //      Nick Drochak (ndrochak@gol.com)
   7 //      Jackson Harper (Jackson@LatitudeGeo.com)
   8 //      Sebastien Pouliot (spouliot@motus.com)
   9 //
  10 // (C) 2001 Ximian, Inc.
  11 // Portions (C) 2003, 2004 Motus Technologies Inc. (http://www.motus.com)
  12 //
  13
  14 //
  15 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  16 //
  17 // Permission is hereby granted, free of charge, to any person obtaining
  18 // a copy of this software and associated documentation files (the
  19 // "Software"), to deal in the Software without restriction, including
  20 // without limitation the rights to use, copy, modify, merge, publish,
  21 // distribute, sublicense, and/or sell copies of the Software, and to
  22 // permit persons to whom the Software is furnished to do so, subject to
  23 // the following conditions:
  24 //
  25 // The above copyright notice and this permission notice shall be
  26 // included in all copies or substantial portions of the Software.
  27 //
  28 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  29 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  30 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  31 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  32 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  33 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  34 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  35 //
  36
  37 using System;
  38 using System.Collections;
  39 using System.Security.Permissions;
  40
  41 namespace System.Security.Policy {
  42
  43         [Serializable]
  44         [MonoTODO ("Fix serialization compatibility with MS.NET")]
  45         public sealed class Evidence : ICollection, IEnumerable {
  46
  47                 private bool _locked;
  48                 private ArrayList hostEvidenceList;
  49                 private ArrayList assemblyEvidenceList;
  50
  51                 public Evidence ()
  52                 {
  53                         hostEvidenceList = ArrayList.Synchronized (new ArrayList ());
  54                         assemblyEvidenceList = ArrayList.Synchronized (new ArrayList ());
  55                 }
  56
  57                 public Evidence (Evidence evidence) : this ()
  58                 {
  59                         if (evidence != null)
  60                                 Merge (evidence);
  61                 }
  62
  63                 public Evidence (object[] hostEvidence, object[] assemblyEvidence) : this ()
  64                 {
  65                         if (null != hostEvidence)
  66                                 hostEvidenceList.AddRange (hostEvidence);
  67                         if (null != assemblyEvidence)
  68                                 assemblyEvidenceList.AddRange (assemblyEvidence);
  69                 }
  70
  71                 //
  72                 // Public Properties
  73                 //
  74
  75                 public int Count {
  76                         get {
  77                                 return (hostEvidenceList.Count + assemblyEvidenceList.Count);
  78                         }
  79                 }
  80
  81                 public bool IsReadOnly {
  82                         get{ return false; }
  83                 }
  84
  85                 // LAMESPEC: Always TRUE (not FALSE)
  86                 public bool IsSynchronized {
  87                         get { return true; }
  88                 }
  89
  90                 public bool Locked {
  91                         get { return _locked; }
  92                         set {
  93                                 new SecurityPermission (SecurityPermissionFlag.ControlEvidence).Demand ();
  94                                 _locked = value;
  95                         }
  96                 }
  97
  98                 public object SyncRoot {
  99                         get { return this; }
 100                 }
 101
 102                 //
 103                 // Public Methods
 104                 //
 105
 106                 public void AddAssembly (object id)
 107                 {
 108                         assemblyEvidenceList.Add (id);
 109                 }
 110
 111                 public void AddHost (object id)
 112                 {
 113                         if (_locked) {
 114                                 new SecurityPermission (SecurityPermissionFlag.ControlEvidence).Demand ();
 115                         }
 116                         hostEvidenceList.Add (id);
 117                 }
 118
 119                 public void CopyTo (Array array, int index)
 120                 {
 121                         if (hostEvidenceList.Count > 0)
 122                                 hostEvidenceList.CopyTo (array, index);
 123                         if (assemblyEvidenceList.Count > 0)
 124                                 assemblyEvidenceList.CopyTo (array, index + hostEvidenceList.Count);
 125                 }
 126
 127                 public IEnumerator GetEnumerator ()
 128                 {
 129                         return new EvidenceEnumerator (hostEvidenceList.GetEnumerator (),
 130                                 assemblyEvidenceList.GetEnumerator ());
 131                 }
 132
 133                 public IEnumerator GetAssemblyEnumerator ()
 134                 {
 135                         return assemblyEvidenceList.GetEnumerator ();
 136                 }
 137
 138                 public IEnumerator GetHostEnumerator ()
 139                 {
 140                         return hostEvidenceList.GetEnumerator ();
 141                 }
 142
 143                 public void Merge (Evidence evidence)
 144                 {
 145                         IEnumerator hostenum, assemblyenum;
 146
 147                         hostenum = evidence.GetHostEnumerator ();
 148                         while( hostenum.MoveNext () ) {
 149                                 AddHost (hostenum.Current);
 150                         }
 151
 152                         assemblyenum = evidence.GetAssemblyEnumerator ();
 153                         while( assemblyenum.MoveNext () ) {
 154                                 AddAssembly (assemblyenum.Current);
 155                         }
 156                 }
 157
 158                 private class EvidenceEnumerator : IEnumerator {
 159
 160                         private IEnumerator currentEnum, hostEnum, assemblyEnum;
 161
 162                         public EvidenceEnumerator (IEnumerator hostenum, IEnumerator assemblyenum)
 163                         {
 164                                 this.hostEnum = hostenum;
 165                                 this.assemblyEnum = assemblyenum;
 166                                 currentEnum = hostEnum;
 167                         }
 168
 169                         public bool MoveNext ()
 170                         {
 171                                 bool ret = currentEnum.MoveNext ();
 172
 173                                 if ( !ret && hostEnum == currentEnum ) {
 174                                         currentEnum = assemblyEnum;
 175                                         ret = assemblyEnum.MoveNext ();
 176                                 }
 177
 178                                 return ret;
 179                         }
 180
 181                         public void Reset ()
 182                         {
 183                                 hostEnum.Reset ();
 184                                 assemblyEnum.Reset ();
 185                                 currentEnum = hostEnum;
 186                         }
 187
 188                         public object Current {
 189                                 get {
 190                                         return currentEnum.Current;
 191                                 }
 192                         }
 193                 }
 194         }
 195 }
 196