448 lines
16 KiB
C#
448 lines
16 KiB
C#
//
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// System.Activator.cs
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//
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// Authors:
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// Nick Drochak II (ndrochak@gol.com)
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// Gonzalo Paniagua (gonzalo@ximian.com)
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// Marek Safar (marek.safar@gmail.com)
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//
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// (C) 2001 Nick Drochak II
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// (c) 2002 Ximian, Inc. (http://www.ximian.com)
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// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
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// Copyright (C) 2013 Xamarin Inc (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Globalization;
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using System.Reflection;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Security.Permissions;
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using System.Security.Policy;
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using System.Configuration.Assemblies;
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using System.Text;
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using System.Runtime.Remoting;
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using System.Runtime.Remoting.Activation;
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namespace System
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{
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[ClassInterface (ClassInterfaceType.None)]
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[ComVisible (true)]
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[ComDefaultInterface (typeof (_Activator))]
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public sealed class Activator : _Activator
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{
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const BindingFlags _flags = BindingFlags.CreateInstance | BindingFlags.Public | BindingFlags.Instance;
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const BindingFlags _accessFlags = BindingFlags.DeclaredOnly | BindingFlags.FlattenHierarchy | BindingFlags.IgnoreCase |
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BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public |
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BindingFlags.Static;
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private Activator ()
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{
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}
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[MonoTODO ("No COM support")]
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public static ObjectHandle CreateComInstanceFrom (string assemblyName, string typeName)
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{
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if (assemblyName == null)
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throw new ArgumentNullException ("assemblyName");
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if (typeName == null)
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throw new ArgumentNullException ("typeName");
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if (assemblyName.Length == 0)
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throw new ArgumentException ("assemblyName");
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throw new NotImplementedException();
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}
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[MonoTODO("Mono does not support COM")]
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public static ObjectHandle CreateComInstanceFrom (string assemblyName, string typeName,
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byte []hashValue, AssemblyHashAlgorithm hashAlgorithm)
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{
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if (assemblyName == null)
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throw new ArgumentNullException ("assemblyName");
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if (typeName == null)
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throw new ArgumentNullException ("typeName");
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if (assemblyName.Length == 0)
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throw new ArgumentException ("assemblyName");
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throw new NotImplementedException();
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}
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public static ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName)
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{
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return CreateInstanceFrom (assemblyFile, typeName, null);
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}
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public static ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName, object [] activationAttributes)
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{
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return Activator.CreateInstanceFrom (assemblyFile, typeName, false, _flags, null, null, null,
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activationAttributes, null);
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}
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#if NET_4_0
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[Obsolete]
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#endif
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public static ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName, bool ignoreCase,
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BindingFlags bindingAttr, Binder binder, object [] args,
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CultureInfo culture, object [] activationAttributes,
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Evidence securityInfo)
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{
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Assembly assembly = Assembly.LoadFrom (assemblyFile, securityInfo);
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if (assembly == null)
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return null;
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Type type = assembly.GetType (typeName, true, ignoreCase);
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if (type == null)
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return null;
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object obj = CreateInstance (type, bindingAttr, binder, args, culture, activationAttributes);
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return (obj != null) ? new ObjectHandle (obj) : null;
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}
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public static ObjectHandle CreateInstance (string assemblyName, string typeName)
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{
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if (assemblyName == null)
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assemblyName = Assembly.GetCallingAssembly ().GetName ().Name;
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return Activator.CreateInstance (assemblyName, typeName, null);
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}
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public static ObjectHandle CreateInstance (string assemblyName, string typeName, object [] activationAttributes)
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{
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if (assemblyName == null)
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assemblyName = Assembly.GetCallingAssembly ().GetName ().Name;
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return Activator.CreateInstance (assemblyName, typeName, false, _flags, null, null, null,
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activationAttributes, null);
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}
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#if NET_4_0
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[Obsolete]
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#endif
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public static ObjectHandle CreateInstance (string assemblyName, string typeName, bool ignoreCase,
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BindingFlags bindingAttr, Binder binder, object [] args,
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CultureInfo culture, object [] activationAttributes, Evidence securityInfo)
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{
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Assembly assembly = null;
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if(assemblyName == null)
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assembly = Assembly.GetCallingAssembly ();
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else
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assembly = Assembly.Load (assemblyName, securityInfo);
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Type type = assembly.GetType (typeName, true, ignoreCase);
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object obj = CreateInstance (type, bindingAttr, binder, args, culture, activationAttributes);
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return (obj != null) ? new ObjectHandle (obj) : null;
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}
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[MonoNotSupported ("no ClickOnce in mono")]
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public static ObjectHandle CreateInstance (ActivationContext activationContext)
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{
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throw new NotImplementedException ();
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}
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[MonoNotSupported ("no ClickOnce in mono")]
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public static ObjectHandle CreateInstance (ActivationContext activationContext, string [] activationCustomData)
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{
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throw new NotImplementedException ();
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}
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// Cross-domain instance creation
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public static ObjectHandle CreateInstanceFrom (AppDomain domain, string assemblyFile, string typeName)
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{
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if (domain == null)
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throw new ArgumentNullException ("domain");
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return domain.CreateInstanceFrom (assemblyFile, typeName);
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}
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#if NET_4_0
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[Obsolete]
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#endif
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public static ObjectHandle CreateInstanceFrom (AppDomain domain, string assemblyFile, string typeName,
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bool ignoreCase, BindingFlags bindingAttr, Binder binder,
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object [] args, CultureInfo culture,
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object [] activationAttributes,
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Evidence securityAttributes)
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{
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if (domain == null)
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throw new ArgumentNullException ("domain");
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return domain.CreateInstanceFrom (assemblyFile, typeName, ignoreCase, bindingAttr, binder, args, culture, activationAttributes, securityAttributes);
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}
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public static ObjectHandle CreateInstance (AppDomain domain, string assemblyName, string typeName)
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{
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if (domain == null)
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throw new ArgumentNullException ("domain");
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return domain.CreateInstance (assemblyName, typeName);
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}
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#if NET_4_0
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[Obsolete]
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#endif
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public static ObjectHandle CreateInstance (AppDomain domain, string assemblyName, string typeName,
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bool ignoreCase, BindingFlags bindingAttr, Binder binder,
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object [] args, CultureInfo culture,
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object [] activationAttributes,
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Evidence securityAttributes)
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{
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if (domain == null)
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throw new ArgumentNullException ("domain");
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return domain.CreateInstance (assemblyName, typeName, ignoreCase, bindingAttr, binder, args, culture, activationAttributes, securityAttributes);
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}
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public static T CreateInstance <T> ()
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{
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return (T) CreateInstance (typeof (T));
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}
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public static object CreateInstance (Type type)
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{
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return CreateInstance (type, false);
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}
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public static object CreateInstance (Type type, params object [] args)
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{
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return CreateInstance (type, args, EmptyArray<object>.Value);
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}
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public static object CreateInstance (Type type, object [] args, object [] activationAttributes)
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{
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return CreateInstance (type, BindingFlags.Default, Binder.DefaultBinder, args, null, activationAttributes);
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}
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public static object CreateInstance (Type type, BindingFlags bindingAttr, Binder binder, object [] args,
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CultureInfo culture)
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{
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return CreateInstance (type, bindingAttr, binder, args, culture, EmptyArray<object>.Value);
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}
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public static object CreateInstance (Type type, BindingFlags bindingAttr, Binder binder, object [] args,
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CultureInfo culture, object [] activationAttributes)
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{
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CheckType (type);
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if (type.ContainsGenericParameters)
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throw new ArgumentException (type + " is an open generic type", "type");
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// It seems to apply the same rules documented for InvokeMember: "If the type of lookup
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// is omitted, BindingFlags.Public | BindingFlags.Instance will apply".
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if ((bindingAttr & _accessFlags) == 0)
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bindingAttr |= BindingFlags.Public | BindingFlags.Instance;
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if (binder == null)
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binder = Binder.DefaultBinder;
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object state;
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ConstructorInfo ctor = (ConstructorInfo) binder.BindToMethod (bindingAttr, type.GetConstructors (bindingAttr), ref args, null, null, null, out state);
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if (ctor == null) {
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// Not sure about this
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if (type.IsValueType && (args == null || args.Length == 0)) {
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return CreateInstanceInternal (type);
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}
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var sb = new StringBuilder ();
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if (args != null) {
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for (int i = 0; i < args.Length; i++) {
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if (i > 0)
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sb.Append (", ");
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var argument = args [i];
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var arg_type = argument != null ? argument.GetType () : null;
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sb.Append (arg_type != null ? arg_type.ToString () : "(unknown)");
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}
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}
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throw new MissingMethodException (String.Format (Locale.GetText ("No constructor found for {0}::.ctor({1})"),
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type.FullName, sb));
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}
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CheckAbstractType (type);
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if (activationAttributes != null && activationAttributes.Length > 0) {
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#if DISABLE_REMOTING
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throw new NotSupportedException ("Activation attributes are not supported");
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#else
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if (!type.IsMarshalByRef) {
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string msg = Locale.GetText ("Type '{0}' doesn't derive from MarshalByRefObject.", type.FullName);
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throw new NotSupportedException (msg);
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}
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object newOb = ActivationServices.CreateProxyFromAttributes (type, activationAttributes);
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if (newOb != null) {
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// This returns null
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ctor.Invoke (newOb, bindingAttr, binder, args, culture);
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return newOb;
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}
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#endif
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}
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return ctor.Invoke (bindingAttr, binder, args, culture);
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}
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public static object CreateInstance (Type type, bool nonPublic)
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{
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CheckType (type);
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if (type.ContainsGenericParameters)
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throw new ArgumentException (type + " is an open generic type", "type");
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MonoType monoType = type.UnderlyingSystemType as MonoType;
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if (monoType == null)
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throw new ArgumentException ("Type must be a type provided by the runtime");
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CheckAbstractType (monoType);
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var ctor = monoType.GetDefaultConstructor ();
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if (!nonPublic && ctor != null && !ctor.IsPublic) {
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ctor = null;
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}
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if (ctor == null) {
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if (type.IsValueType)
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return CreateInstanceInternal (type);
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throw new MissingMethodException (Locale.GetText ("Default constructor not found for type " + type.FullName));
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}
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return ctor.InternalInvoke (null, null);
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}
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private static void CheckType (Type type)
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{
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if (type == null)
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throw new ArgumentNullException ("type");
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if ((type == typeof (TypedReference)) || (type == typeof (ArgIterator)) || (type == typeof (void)) ||
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(type == typeof (RuntimeArgumentHandle))) {
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string msg = Locale.GetText ("CreateInstance cannot be used to create this type ({0}).", type.FullName);
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throw new NotSupportedException (msg);
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}
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}
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private static void CheckAbstractType (Type type)
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{
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if (type.IsAbstract) {
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string msg = Locale.GetText ("Cannot create an abstract class '{0}'.", type.FullName);
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throw new MissingMethodException (msg);
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}
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}
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[SecurityPermission (SecurityAction.LinkDemand, RemotingConfiguration = true)]
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public static object GetObject (Type type, string url)
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{
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if (type == null)
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throw new ArgumentNullException ("type");
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return RemotingServices.Connect (type, url);
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}
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[SecurityPermission (SecurityAction.LinkDemand, RemotingConfiguration = true)]
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public static object GetObject (Type type, string url, object state)
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{
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if (type == null)
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throw new ArgumentNullException ("type");
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return RemotingServices.Connect (type, url, state);
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}
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[MethodImplAttribute (MethodImplOptions.InternalCall)]
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internal static extern object CreateInstanceInternal (Type type);
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void _Activator.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
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{
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throw new NotImplementedException ();
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}
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void _Activator.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
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{
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throw new NotImplementedException ();
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}
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void _Activator.GetTypeInfoCount (out uint pcTInfo)
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{
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throw new NotImplementedException ();
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}
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void _Activator.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams,
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IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
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{
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throw new NotImplementedException ();
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}
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#if NET_4_0
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public static ObjectHandle CreateInstance (string assemblyName, string typeName, bool ignoreCase,
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BindingFlags bindingAttr, Binder binder, object [] args,
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CultureInfo culture, object [] activationAttributes)
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{
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Assembly assembly = null;
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if(assemblyName == null)
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assembly = Assembly.GetCallingAssembly ();
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else
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assembly = Assembly.Load (assemblyName);
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Type type = assembly.GetType (typeName, true, ignoreCase);
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object obj = CreateInstance (type, bindingAttr, binder, args, culture, activationAttributes);
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return (obj != null) ? new ObjectHandle (obj) : null;
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}
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public static ObjectHandle CreateInstance (AppDomain domain, string assemblyName, string typeName,
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bool ignoreCase, BindingFlags bindingAttr, Binder binder,
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object [] args, CultureInfo culture,
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object [] activationAttributes)
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{
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if (domain == null)
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throw new ArgumentNullException ("domain");
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return domain.CreateInstance (assemblyName, typeName, ignoreCase, bindingAttr, binder, args, culture, activationAttributes);
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}
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public static ObjectHandle CreateInstanceFrom (string assemblyFile, string typeName, bool ignoreCase,
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BindingFlags bindingAttr, Binder binder, object [] args,
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CultureInfo culture, object [] activationAttributes)
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{
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Assembly assembly = Assembly.LoadFrom (assemblyFile);
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if (assembly == null)
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return null;
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Type type = assembly.GetType (typeName, true, ignoreCase);
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if (type == null)
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return null;
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object obj = CreateInstance (type, bindingAttr, binder, args, culture, activationAttributes);
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return (obj != null) ? new ObjectHandle (obj) : null;
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}
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public static ObjectHandle CreateInstanceFrom (AppDomain domain, string assemblyFile, string typeName,
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bool ignoreCase, BindingFlags bindingAttr, Binder binder,
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object [] args, CultureInfo culture,
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object [] activationAttributes)
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{
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if (domain == null)
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throw new ArgumentNullException ("domain");
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return domain.CreateInstanceFrom (assemblyFile, typeName, ignoreCase, bindingAttr, binder, args, culture, activationAttributes);
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}
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#endif
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}
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}
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