class/corlib/System.Runtime.Serialization/FormatterServices.cs

   1 //
   2 // System.Runtime.Serialization.FormatterServices
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (C) 2002 Ximian, Inc (http://www.ximian.com)
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 using System;
  33 using System.Collections;
  34 using System.Reflection;
  35 using System.Runtime.CompilerServices;
  36 using System.Runtime.Serialization.Formatters;
  37 using System.Globalization;
  38
  39 namespace System.Runtime.Serialization
  40 {
  41 #if NET_2_0
  42         [System.Runtime.InteropServices.ComVisibleAttribute (true)]
  43 #endif
  44         public sealed class FormatterServices
  45         {
  46                 private const BindingFlags fieldFlags = BindingFlags.Public |
  47                                                         BindingFlags.Instance |
  48                                                         BindingFlags.NonPublic |
  49                                                         BindingFlags.DeclaredOnly;
  50
  51                 private FormatterServices ()
  52                 {
  53                 }
  54
  55                 public static object [] GetObjectData (object obj, MemberInfo [] members)
  56                 {
  57                         if (obj == null)
  58                                 throw new ArgumentNullException ("obj");
  59
  60                         if (members == null)
  61                                 throw new ArgumentNullException ("members");
  62
  63                         int n = members.Length;
  64                         object [] result = new object [n];
  65                         for (int i = 0; i < n; i++) {
  66                                 MemberInfo member = members [i];
  67                                 if (member == null)
  68                                         throw new ArgumentNullException (String.Format ("members[{0}]", i));
  69
  70                                 if (member.MemberType != MemberTypes.Field)
  71                                         throw new SerializationException (
  72                                                         String.Format ("members [{0}] is not a field.", i));
  73
  74                                 FieldInfo fi = member as FieldInfo; // members must be fields
  75                                 result [i] = fi.GetValue (obj);
  76                         }
  77
  78                         return result;
  79                 }
  80
  81                 public static MemberInfo [] GetSerializableMembers (Type type)
  82                 {
  83                         StreamingContext st = new StreamingContext (StreamingContextStates.All);
  84                         return GetSerializableMembers (type, st);
  85                 }
  86
  87                 public static MemberInfo [] GetSerializableMembers (Type type, StreamingContext context)
  88                 {
  89                         if (type == null)
  90                                 throw new ArgumentNullException ("type");
  91
  92                         //FIXME: context?
  93                         ArrayList fields = new ArrayList ();
  94                         Type t = type;
  95                         while (t != null) {
  96                                 if (!t.IsSerializable) {
  97                                         string msg = String.Format ("Type {0} in assembly {1} is not " +
  98                                                                     "marked as serializable.",
  99                                                                     t, t.Assembly.FullName);
 100
 101                                         throw new SerializationException (msg);
 102                                 }
 103
 104                                 GetFields (type, t, fields);
 105                                 t = t.BaseType;
 106                         }
 107
 108                         MemberInfo [] result = new MemberInfo [fields.Count];
 109                         fields.CopyTo (result);
 110                         return result;
 111                 }
 112
 113                 private static void GetFields (Type reflectedType, Type type, ArrayList fields)
 114                 {
 115                         FieldInfo [] fs = type.GetFields (fieldFlags);
 116                         foreach (FieldInfo field in fs)
 117                                 if (!(field.IsNotSerialized)) {
 118                                         MonoField mf = field as MonoField;
 119                                         if (mf != null && reflectedType != type && !mf.IsPublic) {
 120                                                 string fname = type.Name + "+" + mf.Name;
 121                                                 fields.Add (mf.Clone (fname));
 122                                         }
 123                                         else
 124                                                 fields.Add (field);
 125                                 }
 126                 }
 127
 128                 public static Type GetTypeFromAssembly (Assembly assem, string name)
 129                 {
 130                         if (assem == null)
 131                                 throw new ArgumentNullException ("assem");
 132
 133                         if (name == null)
 134                                 throw new ArgumentNullException ("name");
 135
 136                         return assem.GetType (name);
 137                 }
 138
 139                 public static object GetUninitializedObject (Type type)
 140                 {
 141                         if (type == null)
 142                                 throw new ArgumentNullException ("type");
 143
 144                         if (type == typeof (string))
 145                                 throw new ArgumentException ("Uninitialized Strings cannot be created.");
 146
 147                         return System.Runtime.Remoting.Activation.ActivationServices.AllocateUninitializedClassInstance (type);
 148                 }
 149
 150                 public static object PopulateObjectMembers (object obj, MemberInfo [] members, object [] data)
 151                 {
 152                         if (obj == null)
 153                                 throw new ArgumentNullException ("obj");
 154
 155                         if (members == null)
 156                                 throw new ArgumentNullException ("members");
 157
 158                         if (data == null)
 159                                 throw new ArgumentNullException ("data");
 160
 161                         int length = members.Length;
 162                         if (length != data.Length)
 163                                 throw new ArgumentException ("different length in members and data");
 164
 165                         for (int i = 0; i < length; i++) {
 166                                 MemberInfo member = members [i];
 167                                 if (member == null)
 168                                         throw new ArgumentNullException (String.Format ("members[{0}]", i));
 169
 170                                 if (member.MemberType != MemberTypes.Field)
 171                                         throw new SerializationException (
 172                                                         String.Format ("members [{0}] is not a field.", i));
 173
 174                                 FieldInfo fi = member as FieldInfo; // members must be fields
 175                                 fi.SetValue (obj, data [i]);
 176                         }
 177
 178                         return obj;
 179                 }
 180
 181 #if NET_1_1
 182
 183                 public static void CheckTypeSecurity (Type t, TypeFilterLevel securityLevel)
 184                 {
 185                         if (securityLevel == TypeFilterLevel.Full) return;
 186                         CheckNotAssignable (typeof(System.DelegateSerializationHolder), t);
 187                         CheckNotAssignable (typeof(System.Runtime.Remoting.Lifetime.ISponsor), t);
 188                         CheckNotAssignable (typeof(System.Runtime.Remoting.IEnvoyInfo), t);
 189                         CheckNotAssignable (typeof(System.Runtime.Remoting.ObjRef), t);
 190                 }
 191
 192                 static void CheckNotAssignable (Type basetype, Type type)
 193                 {
 194                         if (basetype.IsAssignableFrom (type)) {
 195                                 string msg = "Type " + basetype + " and the types derived from it";
 196                                 msg += " (such as " + type + ") are not permitted to be deserialized at this security level";
 197                                 throw new System.Security.SecurityException (msg);
 198                         }
 199                 }
 200
 201                 public static object GetSafeUninitializedObject (Type type)
 202                 {
 203                         // FIXME: MS.NET uses code access permissions to check if the caller is
 204                         // allowed to create an instance of this type. We can't support this
 205                         // because it is not implemented in mono.
 206
 207                         // In concrete, the it will request a SecurityPermission of
 208                         // type "Infrastructure".
 209
 210                         return GetUninitializedObject (type);
 211                 }
 212 #endif
 213         }
 214 }