MethodBase.cs :  » 2.6.4-mono-.net-core » System.Reflection » System » Reflection » C# / CSharp Open Source

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C# / CSharp Open Source » 2.6.4 mono .net core » System.Reflection 
System.Reflection » System » Reflection » MethodBase.cs
//
// System.Reflection/MethodBase.cs
//
// Author:
//   Paolo Molaro (lupus@ximian.com)
//
// (C) 2001 Ximian, Inc.  http://www.ximian.com
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.Diagnostics;
using System.Globalization;
using System.Reflection.Emit;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace System.Reflection{

  [ComVisible (true)]
  [ComDefaultInterfaceAttribute (typeof (_MethodBase))]
  [Serializable]
  [ClassInterface(ClassInterfaceType.None)]
  public abstract class MethodBase: MemberInfo, _MethodBase {

    [MethodImplAttribute (MethodImplOptions.InternalCall)]
    public extern static MethodBase GetCurrentMethod ();

    internal static MethodBase GetMethodFromHandleNoGenericCheck (RuntimeMethodHandle handle)
    {
      return GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
    }

    static MethodBase GetMethodFromIntPtr (IntPtr handle, IntPtr declaringType)
    {
      if (handle == IntPtr.Zero)
        throw new ArgumentException ("The handle is invalid.");
      MethodBase res = GetMethodFromHandleInternalType (handle, declaringType);
      if (res == null)
        throw new ArgumentException ("The handle is invalid.");      
      return res;
    }

    public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle)
    {
      MethodBase res = GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
      Type t = res.DeclaringType;
      if (t.IsGenericType || t.IsGenericTypeDefinition)
        throw new ArgumentException ("Cannot resolve method because it's declared in a generic class.");
      return res;
    }

    [MethodImplAttribute (MethodImplOptions.InternalCall)]
    private extern static MethodBase GetMethodFromHandleInternalType (IntPtr method_handle, IntPtr type_handle);

    [ComVisible (false)]
    public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle, RuntimeTypeHandle declaringType)
    {
      return GetMethodFromIntPtr (handle.Value, declaringType.Value);
    }

    public abstract MethodImplAttributes GetMethodImplementationFlags();

    public abstract ParameterInfo[] GetParameters();
    
    //
    // This is a quick version for our own use. We should override
    // it where possible so that it does not allocate an array.
    //
    internal virtual int GetParameterCount ()
    {
      throw new NotImplementedException ("must be implemented");
    }

    [DebuggerHidden]
    [DebuggerStepThrough]    
    public Object Invoke(Object obj, Object[] parameters) {
      return Invoke (obj, 0, null, parameters, null);
    }

    public abstract Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture);

    protected MethodBase()
    {
    }

    public abstract RuntimeMethodHandle MethodHandle { get; }
    public abstract MethodAttributes Attributes { get; }
    public virtual CallingConventions CallingConvention { get {return CallingConventions.Standard;} }
    public Boolean IsPublic { 
      get {
        return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Public;
      }
    }
    public Boolean IsPrivate {
      get {
        return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private;
      }
    }
    public Boolean IsFamily {
      get {
        return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Family;
      }
    }
    public Boolean IsAssembly {
      get {
        return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Assembly;
      }
    }
    public Boolean IsFamilyAndAssembly {
      get {
        return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamANDAssem;
      }
    }
    public Boolean IsFamilyOrAssembly {
      get {
        return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamORAssem;
      }
    }
    public Boolean IsStatic {
      get {
        return (Attributes & MethodAttributes.Static) != 0;
      }
    }
    public Boolean IsFinal {
      get {
        return (Attributes & MethodAttributes.Final) != 0;
      }
    }
    public Boolean IsVirtual {
      get {
        return (Attributes & MethodAttributes.Virtual) != 0;
      }
    }
    public Boolean IsHideBySig {
      get {
        return (Attributes & MethodAttributes.HideBySig) != 0;
      }
    }
    public Boolean IsAbstract {
      get {
        return (Attributes & MethodAttributes.Abstract) != 0;
      }
    }
    public Boolean IsSpecialName {
      get {
        int attr = (int)Attributes;
        return (attr & (int)MethodAttributes.SpecialName) != 0;
      }
    }
    [ComVisibleAttribute (true)]
    public Boolean IsConstructor {
      get {
        int attr = (int)Attributes;
        return ((attr & (int)MethodAttributes.RTSpecialName) != 0
          && (Name == ".ctor"));
      }
    }

    internal virtual int get_next_table_index (object obj, int table, bool inc) {
      if (this is MethodBuilder) {
        MethodBuilder mb = (MethodBuilder)this;
        return mb.get_next_table_index (obj, table, inc);
      }
      if (this is ConstructorBuilder) {
        ConstructorBuilder mb = (ConstructorBuilder)this;
        return mb.get_next_table_index (obj, table, inc);
      }
      throw new Exception ("Method is not a builder method");
    }

    [ComVisible (true)]
    public virtual Type [] GetGenericArguments ()
    {
      throw new NotSupportedException ();
    }

    public virtual bool ContainsGenericParameters {
      get {
        return false;
      }
    }

    public virtual bool IsGenericMethodDefinition {
      get {
        return false;
      }
    }

    public virtual bool IsGenericMethod {
      get {
        return false;
      }
    }

    [MethodImplAttribute (MethodImplOptions.InternalCall)]
    internal extern static MethodBody GetMethodBodyInternal (IntPtr handle);

    internal static MethodBody GetMethodBody (IntPtr handle) {
      return GetMethodBodyInternal (handle);
    }

    public virtual MethodBody GetMethodBody () {
      throw new NotSupportedException ();
    }


#if NET_4_0
    public override bool Equals (object obj)
    {
      return obj == this;
    }

    public override int GetHashCode ()
    {
      return base.GetHashCode ();
    }

    public static bool operator == (MethodBase left, MethodBase right)
    {
      if ((object)left == (object)right)
        return true;
      if ((object)left == null ^ (object)right == null)
        return false;
      return left.Equals (right);
    }

    public static bool operator != (MethodBase left, MethodBase right)
    {
      if ((object)left == (object)right)
        return false;
      if ((object)left == null ^ (object)right == null)
        return true;
      return !left.Equals (right);
    }
#endif

    void _MethodBase.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
    {
      throw new NotImplementedException ();
    }

    void _MethodBase.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
    {
      throw new NotImplementedException ();
    }

    void _MethodBase.GetTypeInfoCount (out uint pcTInfo)
    {
      throw new NotImplementedException ();
    }

    void _MethodBase.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
    {
      throw new NotImplementedException ();
    }
  }
}
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