MethodOverride.cs :  » Inversion-of-Control-Dependency-Injection » Spring.net » Spring » Objects » Factory » Support » C# / CSharp Open Source

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C# / CSharp Open Source » Inversion of Control Dependency Injection » Spring.net 
Spring.net » Spring » Objects » Factory » Support » MethodOverride.cs
#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.Factory.Support{
  /// <summary>
  /// Represents the override of a method on a managed object by the IoC container.
  /// </summary>
  /// <remarks>
  /// <p>
  /// Note that the override mechanism is <i>not</i> intended as a generic means of
  /// inserting crosscutting code: use AOP for that.
  /// </p>
  /// </remarks>
  /// <author>Rod Johnson</author>
  /// <author>Rick Evans (.NET)</author>
    [Serializable]
    public abstract class MethodOverride
  {
    private readonly string methodName;
    private bool isOverloaded = true;

    /// <summary>
    /// Creates a new instance of the
    /// <see cref="Spring.Objects.Factory.Support.MethodOverride"/> class.
    /// </summary>
    /// <remarks>
    /// <p>
    /// This is an <see langword="abstract"/> class, and as such exposes no
    /// public constructors.
    /// </p>
    /// </remarks>
    /// <param name="methodName">
    /// The name of the method that is to be overridden.
    /// </param>
    /// <exception cref="System.ArgumentNullException">
    /// If the supplied <paramref name="methodName"/> is <see langword="null"/> or
    /// contains only whitespace character(s).
    /// </exception>
    protected MethodOverride(string methodName)
    {
      AssertUtils.ArgumentHasText(methodName, "methodName");
      this.methodName = methodName.Trim();
    }

    /// <summary>
    /// The name of the method that is to be overridden.
    /// </summary>
    public string MethodName
    {
      get { return methodName; }
    }

    /// <summary>
    /// Is the method that is ot be injected
    /// (<see cref="Spring.Objects.Factory.Support.MethodOverride.MethodName"/>)
    /// to be considered as overloaded?
    /// </summary>
    /// <remarks>
    /// <p>
    /// If <see lang="true"/> (the default), then argument type matching
    /// will be performed (because one would not want to override the wrong
    /// method).
    /// </p>
    /// <p>
    /// Setting the value of this property to <see lang="false"/> can be used
    /// to optimize runtime performance (ever so slightly).
    /// </p>
    /// </remarks>
    public bool IsOverloaded
    {
      get { return isOverloaded; }
      set { isOverloaded = value; }
    }

    /// <summary>
    /// Does this <see cref="Spring.Objects.Factory.Support.MethodOverride"/>
    /// match the supplied <paramref name="method"/>?
    /// </summary>
    /// <remarks>
    /// <p>
    /// By 'match' one means does this particular
    /// <see cref="Spring.Objects.Factory.Support.MethodOverride"/>
    /// instance apply to the supplied <paramref name="method"/>?
    /// </p>
    /// <p>
    /// This allows for argument list checking as well as method name checking.
    /// </p>
    /// </remarks>
    /// <param name="method">The method to be checked.</param>
    /// <returns>
    /// <see lang="true"/> if this override matches the supplied
    /// <paramref name="method"/>.
    /// </returns>
    public abstract bool Matches(MethodInfo method);
  }
}
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