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
  38 namespace System.Runtime.Serialization
  39 {
  40         public sealed class FormatterServices
  41         {
  42                 private const BindingFlags fieldFlags = BindingFlags.Public |
  43                                                         BindingFlags.Instance |
  44                                                         BindingFlags.NonPublic |
  45                                                         BindingFlags.DeclaredOnly;
  46
  47                 private FormatterServices ()
  48                 {
  49                 }
  50
  51                 public static object [] GetObjectData (object obj, MemberInfo [] members)
  52                 {
  53                         if (obj == null)
  54                                 throw new ArgumentNullException ("obj");
  55
  56                         if (members == null)
  57                                 throw new ArgumentNullException ("members");
  58
  59                         int n = members.Length;
  60                         object [] result = new object [n];
  61                         for (int i = 0; i < n; i++) {
  62                                 MemberInfo member = members [i];
  63                                 if (member == null)
  64                                         throw new ArgumentNullException (String.Format ("members[{0}]", i));
  65
  66                                 if (member.MemberType != MemberTypes.Field)
  67                                         throw new SerializationException (
  68                                                         String.Format ("members [{0}] is not a field.", i));
  69
  70                                 FieldInfo fi = member as FieldInfo; // members must be fields
  71                                 result [i] = fi.GetValue (obj);
  72                         }
  73
  74                         return result;
  75                 }
  76
  77                 public static MemberInfo [] GetSerializableMembers (Type type)
  78                 {
  79                         StreamingContext st = new StreamingContext (StreamingContextStates.All);
  80                         return GetSerializableMembers (type, st);
  81                 }
  82
  83                 public static MemberInfo [] GetSerializableMembers (Type type, StreamingContext context)
  84                 {
  85                         if (type == null)
  86                                 throw new ArgumentNullException ("type");
  87
  88                         //FIXME: context?
  89                         ArrayList fields = new ArrayList ();
  90                         Type t = type;
  91                         while (t != null) {
  92                                 if (!t.IsSerializable) {
  93                                         string msg = String.Format ("Type {0} in assembly {1} is not " +
  94                                                                     "marked as serializable.",
  95                                                                     t, t.Assembly.FullName);
  96
  97                                         throw new SerializationException (msg);
  98                                 }
  99
 100                                 GetFields (t, fields);
 101                                 t = t.BaseType;
 102                         }
 103
 104                         MemberInfo [] result = new MemberInfo [fields.Count];
 105                         fields.CopyTo (result);
 106                         return result;
 107                 }
 108
 109                 private static void GetFields (Type type, ArrayList fields)
 110                 {
 111                         FieldInfo [] fs = type.GetFields (fieldFlags);
 112                         foreach (FieldInfo field in fs)
 113                                 if (!(field.IsNotSerialized))
 114                                         fields.Add (field);
 115                 }
 116
 117                 public static Type GetTypeFromAssembly (Assembly assem, string name)
 118                 {
 119                         if (assem == null)
 120                                 throw new ArgumentNullException ("assem");
 121
 122                         if (name == null)
 123                                 throw new ArgumentNullException ("name");
 124
 125                         return assem.GetType (name);
 126                 }
 127
 128                 public static object GetUninitializedObject (Type type)
 129                 {
 130                         if (type == null)
 131                                 throw new ArgumentNullException ("type");
 132
 133                         if (type == typeof (string))
 134                                 throw new ArgumentException ("Uninitialized Strings cannot be created.");
 135
 136                         return System.Runtime.Remoting.Activation.ActivationServices.AllocateUninitializedClassInstance (type);
 137                 }
 138
 139                 public static object PopulateObjectMembers (object obj, MemberInfo [] members, object [] data)
 140                 {
 141                         if (obj == null)
 142                                 throw new ArgumentNullException ("obj");
 143
 144                         if (members == null)
 145                                 throw new ArgumentNullException ("members");
 146
 147                         if (data == null)
 148                                 throw new ArgumentNullException ("data");
 149
 150                         int length = members.Length;
 151                         if (length != data.Length)
 152                                 throw new ArgumentException ("different length in members and data");
 153
 154                         for (int i = 0; i < length; i++) {
 155                                 MemberInfo member = members [i];
 156                                 if (member == null)
 157                                         throw new ArgumentNullException (String.Format ("members[{0}]", i));
 158
 159                                 if (member.MemberType != MemberTypes.Field)
 160                                         throw new SerializationException (
 161                                                         String.Format ("members [{0}] is not a field.", i));
 162
 163                                 FieldInfo fi = member as FieldInfo; // members must be fields
 164                                 fi.SetValue (obj, data [i]);
 165                         }
 166
 167                         return obj;
 168                 }
 169
 170 #if NET_1_1
 171
 172                 public static void CheckTypeSecurity (Type t, TypeFilterLevel securityLevel)
 173                 {
 174                         if (securityLevel == TypeFilterLevel.Full) return;
 175                         CheckNotAssignable (typeof(System.DelegateSerializationHolder), t);
 176                         CheckNotAssignable (typeof(System.Runtime.Remoting.Lifetime.ISponsor), t);
 177                         CheckNotAssignable (typeof(System.Runtime.Remoting.IEnvoyInfo), t);
 178                         CheckNotAssignable (typeof(System.Runtime.Remoting.ObjRef), t);
 179                 }
 180
 181                 static void CheckNotAssignable (Type basetype, Type type)
 182                 {
 183                         if (basetype.IsAssignableFrom (type)) {
 184                                 string msg = "Type " + basetype + " and the types derived from it";
 185                                 msg += " (such as " + type + ") are not permitted to be deserialized at this security level";
 186                                 throw new System.Security.SecurityException (msg);
 187                         }
 188                 }
 189
 190                 public static object GetSafeUninitializedObject (Type type)
 191                 {
 192                         // FIXME: MS.NET uses code access permissions to check if the caller is
 193                         // allowed to create an instance of this type. We can't support this
 194                         // because it is not implemented in mono.
 195
 196                         // In concrete, the it will request a SecurityPermission of
 197                         // type "Infrastructure".
 198
 199                         return GetUninitializedObject (type);
 200                 }
 201 #endif
 202         }
 203 }