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A Flexible Plugin System

, 3 Sep 2008 LGPL3
A generic plugin system used to load and manage plugins
trunk
dlls
xunit.dll
Examples
Plugins
ExampleApplication.Shared
Properties
ExampleApplication
Properties
ExamplePlugin.Shared
Properties
ExamplePlugin
Properties
Fadd.Globalization.Yaml
fadd.snk
Properties
Tests
fadd
Commands
Net
Tests
fadd.snk
Globalization
Tests
Logging
Plugins
Properties
Tests
Validation
using System;

namespace Fadd.Commands
{

    /// <summary>
    /// Delegate used to determine if the command propagation can be cancelled.
    /// </summary>
    /// <param name="source">Distlight that the command was going through.</param>
    /// <param name="args">Event information.</param>
    /// <returns>true of command can be cancelled.</returns>
    /// <seealso cref="CommandEventArgs.CancelPropagation"/>
    public delegate bool PropagationHandler(object source, PropagationEventArgs args);

    /// <summary>
    /// Event arguments for <see cref="PropagationHandler"/>.
    /// </summary>
    public class PropagationEventArgs : EventArgs
    {
        private readonly Command _command;
        private readonly CommandHandler _handler;

        /// <summary>
        /// Initializes a new instance of the <see cref="PropagationEventArgs"/> class.
        /// </summary>
        /// <param name="command">Command that was cancelled.</param>
        /// <param name="handler">Handler that cancelled the propagation</param>
        public PropagationEventArgs(Command command, CommandHandler handler)
        {
            if (command == null)
                throw new ArgumentNullException("command");
            if (handler == null)
                throw new ArgumentNullException("handler");

            _command = command;
            _handler = handler;
        }

        /// <summary>
        /// Command that was cancelled by a handler
        /// </summary>
        public Command Command
        {
            get { return _command; }
        }

        /// <summary>
        /// Handler that which to cancel the command.
        /// </summary>
        public CommandHandler Handler
        {
            get { return _handler; }
        }
    }
}

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License

This article, along with any associated source code and files, is licensed under The GNU Lesser General Public License (LGPLv3)

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About the Author

jgauffin
Founder Gauffin Interactive AB
Sweden Sweden
Founder of OneTrueError, a .NET service which captures, analyzes and provide possible solutions for exceptions.

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