source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.Cecil/0.9.5/Mono.Cecil-0.9.5/Mono.Cecil/Mono.Cecil/EventDefinition.cs @ 11700

//
// EventDefinition.cs
//
// Author:
//   Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2011 Jb Evain
//
// 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 Mono.Collections.Generic;

namespace Mono.Cecil {

  public sealed class EventDefinition : EventReference, IMemberDefinition {

    ushort attributes;

    Collection<CustomAttribute> custom_attributes;

    internal MethodDefinition add_method;
    internal MethodDefinition invoke_method;
    internal MethodDefinition remove_method;
    internal Collection<MethodDefinition> other_methods;

    public EventAttributes Attributes {
      get { return (EventAttributes) attributes; }
      set { attributes = (ushort) value; }
    }

    public MethodDefinition AddMethod {
      get {
        if (add_method != null)
          return add_method;

        InitializeMethods ();
        return add_method;
      }
      set { add_method = value; }
    }

    public MethodDefinition InvokeMethod {
      get {
        if (invoke_method != null)
          return invoke_method;

        InitializeMethods ();
        return invoke_method;
      }
      set { invoke_method = value; }
    }

    public MethodDefinition RemoveMethod {
      get {
        if (remove_method != null)
          return remove_method;

        InitializeMethods ();
        return remove_method;
      }
      set { remove_method = value; }
    }

    public bool HasOtherMethods {
      get {
        if (other_methods != null)
          return other_methods.Count > 0;

        InitializeMethods ();
        return !other_methods.IsNullOrEmpty ();
      }
    }

    public Collection<MethodDefinition> OtherMethods {
      get {
        if (other_methods != null)
          return other_methods;

        InitializeMethods ();

        if (other_methods != null)
          return other_methods;

        return other_methods = new Collection<MethodDefinition> ();
      }
    }

    public bool HasCustomAttributes {
      get {
        if (custom_attributes != null)
          return custom_attributes.Count > 0;

        return this.GetHasCustomAttributes (Module);
      }
    }

    public Collection<CustomAttribute> CustomAttributes {
      get { return custom_attributes ?? (custom_attributes = this.GetCustomAttributes (Module)); }
    }

    #region EventAttributes

    public bool IsSpecialName {
      get { return attributes.GetAttributes ((ushort) EventAttributes.SpecialName); }
      set { attributes = attributes.SetAttributes ((ushort) EventAttributes.SpecialName, value); }
    }

    public bool IsRuntimeSpecialName {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.RTSpecialName); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.RTSpecialName, value); }
    }

    #endregion

    public new TypeDefinition DeclaringType {
      get { return (TypeDefinition) base.DeclaringType; }
      set { base.DeclaringType = value; }
    }

    public override bool IsDefinition {
      get { return true; }
    }

    public EventDefinition (string name, EventAttributes attributes, TypeReference eventType)
      : base (name, eventType)
    {
      this.attributes = (ushort) attributes;
      this.token = new MetadataToken (TokenType.Event);
    }

    void InitializeMethods ()
    {
      if (add_method != null
        || invoke_method != null
        || remove_method != null)
        return;

      var module = this.Module;
      if (!module.HasImage ())
        return;

      module.Read (this, (@event, reader) => reader.ReadMethods (@event));
    }

    public override EventDefinition Resolve ()
    {
      return this;
    }
  }
}