1 files changed, 121 insertions, 0 deletions

diff --git a/OpenSim/Services/Base/ServiceBase.cs b/OpenSim/Services/Base/ServiceBase.cs
new file mode 100644
index 0000000..a7eb2be
--- /dev/null
+++ b/OpenSim/Services/Base/ServiceBase.cs
@@ -0,0 +1,121 @@
+/*
+ * 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 OpenSimulator 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 Nini.Config;
+using OpenSim.Services.Interfaces;
+
+namespace OpenSim.Services.Base
+{
+    public class ServiceBase
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        
+        public T LoadPlugin<T>(string dllName) where T:class
+        {
+            return LoadPlugin<T>(dllName, new Object[0]);
+        }
+
+        public T LoadPlugin<T>(string dllName, Object[] args) where T:class
+        {
+            // The path:type separator : is unfortunate because it collides
+            // with Windows paths like C:\...
+            // When the path provided includes the drive, this fails.
+            // Hence the root/noroot thing going on here.
+            string pathRoot = Path.GetPathRoot(dllName);
+            string noRoot = dllName.Substring(pathRoot.Length);
+            string[] parts = noRoot.Split(new char[] {':'});
+
+            dllName = pathRoot + parts[0];
+
+            string className = String.Empty;
+
+            if (parts.Length > 1)
+                className = parts[1];
+
+            return LoadPlugin<T>(dllName, className, args);
+        }
+
+        public T LoadPlugin<T>(string dllName, string className, Object[] args) where T:class
+        {
+            string interfaceName = typeof(T).ToString();
+
+            try
+            {
+                Assembly pluginAssembly = Assembly.LoadFrom(dllName);
+
+//                m_log.DebugFormat("[SERVICE BASE]: Found assembly {0}", dllName);
+
+                foreach (Type pluginType in pluginAssembly.GetTypes())
+                {
+//                    m_log.DebugFormat("[SERVICE BASE]: Found type {0}", pluginType);
+
+                    if (pluginType.IsPublic)
+                    {
+                        if (className != String.Empty &&
+                                pluginType.ToString() !=
+                                pluginType.Namespace + "." + className)
+                            continue;
+
+                        Type typeInterface =
+                                pluginType.GetInterface(interfaceName);
+                        if (typeInterface != null)
+                        {
+                            T plug = (T)Activator.CreateInstance(pluginType,
+                                    args);
+
+                            return plug;
+                        }
+                    }
+                }
+
+                return null;
+            }
+            catch (Exception e)
+            {
+                List<string> strArgs = new List<string>();
+                foreach (Object arg in args)
+                    strArgs.Add(arg.ToString());
+                
+                m_log.Error(
+                    string.Format(
+                        "[SERVICE BASE]: Failed to load plugin {0} from {1} with args {2}", 
+                        interfaceName, dllName, string.Join(", ", strArgs.ToArray())), e);
+                
+                return null;
+            }
+        }
+
+        public ServiceBase(IConfigSource config)
+        {
+        }
+    }
+}
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