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

//
// System.Reflection/CustomAttributeData.cs
//
// Author:
//   Zoltan Varga (vargaz@gmail.com)
//   Carlos Alberto Cortez (calberto.cortez@gmail.com)
//
// Copyright (C) 2004 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;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;

namespace System.Reflection{

  [ComVisible (true)]
  [Serializable]
#if NET_4_0
  public
#else
  public sealed
#endif
  class CustomAttributeData {
    ConstructorInfo ctorInfo;
    IList<CustomAttributeTypedArgument> ctorArgs;
    IList<CustomAttributeNamedArgument> namedArgs;

#if NET_4_0
    protected CustomAttributeData ()
    {
    }
#endif

    internal CustomAttributeData (ConstructorInfo ctorInfo, object [] ctorArgs, object [] namedArgs)
    {
      this.ctorInfo = ctorInfo;
      
      this.ctorArgs = Array.AsReadOnly<CustomAttributeTypedArgument> 
        (ctorArgs != null ? UnboxValues<CustomAttributeTypedArgument> (ctorArgs) : new CustomAttributeTypedArgument [0]);
      
      this.namedArgs = Array.AsReadOnly<CustomAttributeNamedArgument> 
        (namedArgs != null ? UnboxValues<CustomAttributeNamedArgument> (namedArgs) : new CustomAttributeNamedArgument [0]);
    }

    [ComVisible (true)]
    public
#if NET_4_0
    virtual
#endif
    ConstructorInfo Constructor {
      get {
        return ctorInfo;
      }
    }

    [ComVisible (true)]
    public
#if NET_4_0
    virtual
#endif
    IList<CustomAttributeTypedArgument> ConstructorArguments {
      get {
        return ctorArgs;
      }
    }

    public
#if NET_4_0
    virtual
#endif
    IList<CustomAttributeNamedArgument> NamedArguments {
      get {
        return namedArgs;
      }
    }

    public static IList<CustomAttributeData> GetCustomAttributes (Assembly target) {
      return MonoCustomAttrs.GetCustomAttributesData (target);
    }

    public static IList<CustomAttributeData> GetCustomAttributes (MemberInfo target) {
      return MonoCustomAttrs.GetCustomAttributesData (target);
    }

    public static IList<CustomAttributeData> GetCustomAttributes (Module target) {
      return MonoCustomAttrs.GetCustomAttributesData (target);
    }

    public static IList<CustomAttributeData> GetCustomAttributes (ParameterInfo target) {
      return MonoCustomAttrs.GetCustomAttributesData (target);
    }

    public override string ToString ()
    {
      StringBuilder sb = new StringBuilder ();

      sb.Append ("[" + ctorInfo.DeclaringType.FullName + "(");
      for (int i = 0; i < ctorArgs.Count; i++) {
        sb.Append (ctorArgs [i].ToString ());
        if (i + 1 < ctorArgs.Count)
          sb.Append (", ");
      }

      if (namedArgs.Count > 0)
        sb.Append (", ");
      
      for (int j = 0; j < namedArgs.Count; j++) {
        sb.Append (namedArgs [j].ToString ());
        if (j + 1 < namedArgs.Count)
          sb.Append (", ");
      }
      sb.AppendFormat (")]");

      return sb.ToString ();
    }

    static T [] UnboxValues<T> (object [] values)
    {
      T [] retval = new T [values.Length];
      for (int i = 0; i < values.Length; i++)
        retval [i] = (T) values [i];

      return retval;
    }

    public override bool Equals (object obj)
    {
      CustomAttributeData other = obj as CustomAttributeData;
      if (other == null || other.ctorInfo != ctorInfo ||
          other.ctorArgs.Count != ctorArgs.Count ||
          other.namedArgs.Count != namedArgs.Count)
        return false;
      for (int i = 0; i < ctorArgs.Count; i++)
        if (ctorArgs [i].Equals (other.ctorArgs [i]))
          return false;
      for (int i = 0; i < namedArgs.Count; i++) {
        bool matched = false;
        for (int j = 0; j < other.namedArgs.Count; j++)
          if (namedArgs [i].Equals (other.namedArgs [j])) {
            matched = true;
            break;
          }
        if (!matched)
          return false;
      }
      return true;
    }

    public override int GetHashCode ()
    {
      int ret = ctorInfo.GetHashCode () << 16;
      // argument order-dependent
      for (int i = 0; i < ctorArgs.Count; i++)
        ret += ret ^ 7 + ctorArgs [i].GetHashCode () << (i * 4);
      // argument order-independent
      for (int i = 0; i < namedArgs.Count; i++)
        ret += (namedArgs [i].GetHashCode () << 5);
      return ret;
    }
  }

}