OpenSim-Test/OpenSim/Region/Physics/Manager/PhysicsPluginManager.cs

/*
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*       derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS AND ANY
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*/
using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using OpenSim.Framework.Console;

namespace OpenSim.Region.Physics.Manager
{
	/// <summary>
	/// Description of MyClass.
	/// </summary>
	public class PhysicsPluginManager
	{
		private Dictionary<string, IPhysicsPlugin> _plugins=new Dictionary<string, IPhysicsPlugin>();
		
		public PhysicsPluginManager()
		{
			
		}
		
		public PhysicsScene GetPhysicsScene(string engineName)
		{
            if (String.IsNullOrEmpty(engineName))
            {
                return PhysicsScene.Null;
            }

			if(_plugins.ContainsKey(engineName))
			{
				MainLog.Instance.Verbose("PHYSICS","creating "+engineName);
				return _plugins[engineName].GetScene();
			}
			else
            {
                MainLog.Instance.Warn("PHYSICS", "couldn't find physicsEngine: {0}", engineName);
                throw new ArgumentException(String.Format("couldn't find physicsEngine: {0}",engineName));
			}
		}
		
		public void LoadPlugins()
		{
			string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory ,"Physics");
       		string[] pluginFiles = Directory.GetFiles(path, "*.dll");
        

        	for(int i= 0; i<pluginFiles.Length; i++)
        	{
        		this.AddPlugin(pluginFiles[i]);
        	}
        }
        	
		private void AddPlugin(string FileName)
		{
			Assembly pluginAssembly = Assembly.LoadFrom(FileName);
			
			foreach (Type pluginType in pluginAssembly.GetTypes())
			{
				if (pluginType.IsPublic) 
				{
					if (!pluginType.IsAbstract)  
					{
						Type typeInterface = pluginType.GetInterface("IPhysicsPlugin", true);
						
						if (typeInterface != null)
						{
							IPhysicsPlugin plug = (IPhysicsPlugin)Activator.CreateInstance(pluginAssembly.GetType(pluginType.ToString()));
							plug.Init();
							this._plugins.Add(plug.GetName(),plug);
                            Console.WriteLine("added physics engine: " + plug.GetName());
							
						}	
						
						typeInterface = null; 			
					}				
				}			
			}
			
			pluginAssembly = null; 
		}
        //---
        public static void PhysicsPluginMessage(string message, bool isWarning)
        {
            if (isWarning)
            {
                MainLog.Instance.Warn("PHYSICS", message);
            }
            else
            {
                MainLog.Instance.Verbose("PHYSICS", message);
            }
        }
        //---
	}

	public interface IPhysicsPlugin
	{
		bool Init();
		PhysicsScene GetScene();
		string GetName();
		void Dispose();
	}
}