#region License
/*
* Copyright 2002-2005 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#endregion
#region Imports
using System;
using System.Reflection;
using Spring.Util;
#endregion
namespace Spring.Objects.Support{
/// <summary>
/// Describes an event handler for an object instance.
/// </summary>
/// <author>Rick Evans</author>
public class InstanceEventHandlerValue : AbstractWiringEventHandlerValue
{
#region Constants
private static readonly BindingFlags InstanceMethodFlags =
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic |
BindingFlags.IgnoreCase | BindingFlags.Static;
#endregion
#region Constructor (s) / Destructor
/// <summary>
/// Creates a new instance of the
/// <see cref="Spring.Objects.Support.InstanceEventHandlerValue"/> class.
/// </summary>
public InstanceEventHandlerValue()
{
}
/// <summary>
/// Creates a new instance of the
/// <see cref="Spring.Objects.Support.InstanceEventHandlerValue"/> class.
/// </summary>
/// <param name="source">
/// The object (possibly unresolved) that is exposing the event.
/// </param>
/// <param name="methodName">
/// The name of the method on the handler that is going to handle the event.
/// </param>
public InstanceEventHandlerValue(object source, string methodName)
: base(source, methodName)
{
}
#endregion
#region Methods
/// <summary>
/// Gets the event handler.
/// </summary>
/// <param name="instance">
/// The instance that is registering for the event notification.
/// </param>
/// <param name="info">
/// Event metadata about the event.
/// </param>
/// <returns>
/// The event handler.
/// </returns>
protected override Delegate GetHandler(object instance, EventInfo info)
{
MethodInfo methodMeta = ResolveHandlerMethod(
ReflectionUtils.TypeOfOrType(instance),
info.EventHandlerType,
InstanceEventHandlerValue.InstanceMethodFlags);
Delegate callback = null;
if (methodMeta.IsStatic)
{
// case insensitive binding to a static method on an (irrelevant) instance
callback = Delegate.CreateDelegate(
info.EventHandlerType,
methodMeta);
}
else
{
// case insensitive binding to an instance method on an instance
callback =
Delegate.CreateDelegate(
info.EventHandlerType,
instance,
MethodName,
true);
}
return callback;
}
#endregion
}
}
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