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/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSim Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using log4net;
using OpenSim.ScriptEngine.Shared;
namespace OpenSim.ApplicationPlugins.ScriptEngine
{
public static class ComponentFactory
{
// Component providers are registered here wit a name (string)
// When a script engine is created the components are instanciated
public static Dictionary<string, Type> providers = new Dictionary<string, Type>();
public static Dictionary<string, Type> scriptEngines = new Dictionary<string, Type>();
internal static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private readonly static string nameIScriptEngineComponent = typeof(IScriptEngineComponent).Name; // keep interface name in managed code
private readonly static string nameIScriptEngine = typeof(IScriptEngine).Name; // keep interface name in managed code
public static string Name
{
get { return "SECS.ComponentFactory"; }
}
/// <summary>
/// Load components from directory
/// </summary>
/// <param name="directory"></param>
internal static void Load(string directory, string filter)
{
// We may want to change how this functions as currently it required unique class names for each component
foreach (string file in Directory.GetFiles(directory, filter))
{
//m_log.DebugFormat("[ScriptEngine]: Loading: [{0}].", file);
Assembly componentAssembly = null;
try
{
componentAssembly = Assembly.LoadFrom(file);
}
catch
{
m_log.ErrorFormat("[{0}] Error loading: \"{1}\".", Name, file);
}
if (componentAssembly != null)
{
try
{
// Go through all types in the assembly
foreach (Type componentType in componentAssembly.GetTypes())
{
if (componentType.IsPublic
&& !componentType.IsAbstract)
{
//if (componentType.IsSubclassOf(typeof(ComponentBase)))
if (componentType.GetInterface(nameIScriptEngineComponent) != null)
{
// We have found an type which is derived from ProdiverBase, add it to provider list
m_log.InfoFormat("[{0}] Adding component: {1}", Name, componentType.Name);
lock (providers)
{
providers.Add(componentType.Name, componentType);
}
}
//if (componentType.IsSubclassOf(typeof(ScriptEngineBase)))
if (componentType.GetInterface(nameIScriptEngine) != null)
{
// We have found an type which is derived from RegionScriptEngineBase, add it to engine list
m_log.InfoFormat("[{0}] Adding script engine: {1}", Name, componentType.Name);
lock (scriptEngines)
{
scriptEngines.Add(componentType.Name, componentType);
}
}
}
}
}
catch
(ReflectionTypeLoadException re)
{
m_log.ErrorFormat("[{0}] Could not load component \"{1}\": {2}", Name, componentAssembly.FullName, re.ToString());
int c = 0;
foreach (Exception e in re.LoaderExceptions)
{
c++;
m_log.ErrorFormat("[{0}] LoaderException {1}: {2}", Name, c, e.ToString());
}
}
} //if
} //foreach
}
public static IScriptEngineComponent GetComponentInstance(string name, params Object[] args)
{
lock (providers)
{
if (!providers.ContainsKey(name))
throw new Exception("ScriptEngine requested component named \"" + name +
"\" that does not exist.");
return Activator.CreateInstance(providers[name], args) as IScriptEngineComponent;
}
}
private readonly static string nameIScriptEngineRegionComponent = typeof(IScriptEngineRegionComponent).Name; // keep interface name in managed code
public static IScriptEngineComponent GetComponentInstance(RegionInfoStructure info, string name, params Object[] args)
{
IScriptEngineComponent c = GetComponentInstance(name, args);
// If module is IScriptEngineRegionComponent then it will have one instance per region and we will initialize it
if (c.GetType().GetInterface(nameIScriptEngineRegionComponent) != null)
((IScriptEngineRegionComponent)c).Initialize(info);
return c;
}
}
}
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