mcs/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         [System.Runtime.InteropServices.ComVisibleAttribute (true)]
  42         public sealed class FormatterServices
  43         {
  44                 private const BindingFlags fieldFlags = BindingFlags.Public |
  45                                                         BindingFlags.Instance |
  46                                                         BindingFlags.NonPublic |
  47                                                         BindingFlags.DeclaredOnly;
  48
  49                 private FormatterServices ()
  50                 {
  51                 }
  52
  53                 public static object [] GetObjectData (object obj, MemberInfo [] members)
  54                 {
  55                         if (obj == null)
  56                                 throw new ArgumentNullException ("obj");
  57
  58                         if (members == null)
  59                                 throw new ArgumentNullException ("members");
  60
  61                         int n = members.Length;
  62                         object [] result = new object [n];
  63                         for (int i = 0; i < n; i++) {
  64                                 MemberInfo member = members [i];
  65                                 if (member == null)
  66                                         throw new ArgumentNullException (String.Format ("members[{0}]", i));
  67
  68                                 if (member.MemberType != MemberTypes.Field)
  69                                         throw new SerializationException (
  70                                                         String.Format ("members [{0}] is not a field.", i));
  71
  72                                 FieldInfo fi = member as FieldInfo; // members must be fields
  73                                 result [i] = fi.GetValue (obj);
  74                         }
  75
  76                         return result;
  77                 }
  78
  79                 public static MemberInfo [] GetSerializableMembers (Type type)
  80                 {
  81                         StreamingContext st = new StreamingContext (StreamingContextStates.All);
  82                         return GetSerializableMembers (type, st);
  83                 }
  84
  85                 public static MemberInfo [] GetSerializableMembers (Type type, StreamingContext context)
  86                 {
  87                         if (type == null)
  88                                 throw new ArgumentNullException ("type");
  89
  90                         //FIXME: context?
  91                         ArrayList fields = new ArrayList ();
  92                         Type t = type;
  93                         while (t != null) {
  94                                 if (!t.IsSerializable) {
  95                                         string msg = String.Format ("Type {0} in assembly {1} is not " +
  96                                                                     "marked as serializable.",
  97                                                                     t, t.Assembly.FullName);
  98
  99                                         throw new SerializationException (msg);
 100                                 }
 101
 102                                 GetFields (type, t, fields);
 103                                 t = t.BaseType;
 104                         }
 105
 106                         MemberInfo [] result = new MemberInfo [fields.Count];
 107                         fields.CopyTo (result);
 108                         return result;
 109                 }
 110
 111                 private static void GetFields (Type reflectedType, Type type, ArrayList fields)
 112                 {
 113                         FieldInfo [] fs = type.GetFields (fieldFlags);
 114                         foreach (FieldInfo field in fs)
 115                                 if (!(field.IsNotSerialized)) {
 116                                         MonoField mf = field as MonoField;
 117                                         if (mf != null && reflectedType != type && !mf.IsPublic) {
 118                                                 string fname = type.Name + "+" + mf.Name;
 119                                                 fields.Add (mf.Clone (fname));
 120                                         }
 121                                         else
 122                                                 fields.Add (field);
 123                                 }
 124                 }
 125
 126                 public static Type GetTypeFromAssembly (Assembly assem, string name)
 127                 {
 128                         if (assem == null)
 129                                 throw new ArgumentNullException ("assem");
 130
 131                         if (name == null)
 132                                 throw new ArgumentNullException ("name");
 133
 134                         return assem.GetType (name);
 135                 }
 136
 137                 public static object GetUninitializedObject (Type type)
 138                 {
 139                         if (type == null)
 140                                 throw new ArgumentNullException ("type");
 141
 142                         if (type == typeof (string))
 143                                 throw new ArgumentException ("Uninitialized Strings cannot be created.");
 144
 145                         return System.Runtime.Remoting.Activation.ActivationServices.AllocateUninitializedClassInstance (type);
 146                 }
 147
 148                 public static object PopulateObjectMembers (object obj, MemberInfo [] members, object [] data)
 149                 {
 150                         if (obj == null)
 151                                 throw new ArgumentNullException ("obj");
 152
 153                         if (members == null)
 154                                 throw new ArgumentNullException ("members");
 155
 156                         if (data == null)
 157                                 throw new ArgumentNullException ("data");
 158
 159                         int length = members.Length;
 160                         if (length != data.Length)
 161                                 throw new ArgumentException ("different length in members and data");
 162
 163                         for (int i = 0; i < length; i++) {
 164                                 MemberInfo member = members [i];
 165                                 if (member == null)
 166                                         throw new ArgumentNullException (String.Format ("members[{0}]", i));
 167
 168                                 if (member.MemberType != MemberTypes.Field)
 169                                         throw new SerializationException (
 170                                                         String.Format ("members [{0}] is not a field.", i));
 171
 172                                 FieldInfo fi = member as FieldInfo; // members must be fields
 173                                 fi.SetValue (obj, data [i]);
 174                         }
 175
 176                         return obj;
 177                 }
 178
 179 #if NET_1_1
 180
 181                 public static void CheckTypeSecurity (Type t, TypeFilterLevel securityLevel)
 182                 {
 183                         if (securityLevel == TypeFilterLevel.Full) return;
 184                         CheckNotAssignable (typeof(System.DelegateSerializationHolder), t);
 185                         CheckNotAssignable (typeof(System.Runtime.Remoting.Lifetime.ISponsor), t);
 186                         CheckNotAssignable (typeof(System.Runtime.Remoting.IEnvoyInfo), t);
 187                         CheckNotAssignable (typeof(System.Runtime.Remoting.ObjRef), t);
 188                 }
 189
 190                 static void CheckNotAssignable (Type basetype, Type type)
 191                 {
 192                         if (basetype.IsAssignableFrom (type)) {
 193                                 string msg = "Type " + basetype + " and the types derived from it";
 194                                 msg += " (such as " + type + ") are not permitted to be deserialized at this security level";
 195                                 throw new System.Security.SecurityException (msg);
 196                         }
 197                 }
 198
 199                 public static object GetSafeUninitializedObject (Type type)
 200                 {
 201                         // FIXME: MS.NET uses code access permissions to check if the caller is
 202                         // allowed to create an instance of this type. We can't support this
 203                         // because it is not implemented in mono.
 204
 205                         // In concrete, the it will request a SecurityPermission of
 206                         // type "Infrastructure".
 207
 208                         return GetUninitializedObject (type);
 209                 }
 210 #endif
 211         }
 212 }