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-rw-r--r--OpenSim/ApplicationPlugins/ScriptEngine/ComponentFactory.cs145
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diff --git a/OpenSim/ApplicationPlugins/ScriptEngine/ComponentFactory.cs b/OpenSim/ApplicationPlugins/ScriptEngine/ComponentFactory.cs
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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSimulator Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27using System;
28using System.Collections.Generic;
29using System.IO;
30using System.Reflection;
31using log4net;
32using OpenSim.ScriptEngine.Shared;
33
34namespace OpenSim.ApplicationPlugins.ScriptEngine
35{
36 public static class ComponentFactory
37 {
38 // Component providers are registered here wit a name (string)
39 // When a script engine is created the components are instanciated
40 public static Dictionary<string, Type> providers = new Dictionary<string, Type>();
41 public static Dictionary<string, Type> scriptEngines = new Dictionary<string, Type>();
42
43 internal static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
44 private readonly static string nameIScriptEngineComponent = typeof(IScriptEngineComponent).Name; // keep interface name in managed code
45 private readonly static string nameIScriptEngine = typeof(IScriptEngine).Name; // keep interface name in managed code
46
47 public static string Name
48 {
49 get { return "SECS.ComponentFactory"; }
50 }
51
52 /// <summary>
53 /// Load components from directory
54 /// </summary>
55 /// <param name="directory"></param>
56 internal static void Load(string directory, string filter)
57 {
58 // We may want to change how this functions as currently it required unique class names for each component
59
60 foreach (string file in Directory.GetFiles(directory, filter))
61 {
62 //m_log.DebugFormat("[ScriptEngine]: Loading: [{0}].", file);
63 Assembly componentAssembly = null;
64 try
65 {
66 componentAssembly = Assembly.LoadFrom(file);
67 }
68 catch
69 {
70 m_log.ErrorFormat("[{0}] Error loading: \"{1}\".", Name, file);
71 }
72
73 if (componentAssembly != null)
74 {
75 try
76 {
77 // Go through all types in the assembly
78 foreach (Type componentType in componentAssembly.GetTypes())
79 {
80 if (componentType.IsPublic
81 && !componentType.IsAbstract)
82 {
83 //if (componentType.IsSubclassOf(typeof(ComponentBase)))
84 if (componentType.GetInterface(nameIScriptEngineComponent) != null)
85 {
86 // We have found an type which is derived from ProdiverBase, add it to provider list
87 m_log.InfoFormat("[{0}] Adding component: {1}", Name, componentType.Name);
88 lock (providers)
89 {
90 providers.Add(componentType.Name, componentType);
91 }
92 }
93 //if (componentType.IsSubclassOf(typeof(ScriptEngineBase)))
94 if (componentType.GetInterface(nameIScriptEngine) != null)
95 {
96 // We have found an type which is derived from RegionScriptEngineBase, add it to engine list
97 m_log.InfoFormat("[{0}] Adding script engine: {1}", Name, componentType.Name);
98 lock (scriptEngines)
99 {
100 scriptEngines.Add(componentType.Name, componentType);
101 }
102 }
103 }
104 }
105 }
106 catch
107 (ReflectionTypeLoadException re)
108 {
109 m_log.ErrorFormat("[{0}] Could not load component \"{1}\": {2}", Name, componentAssembly.FullName, re.ToString());
110 int c = 0;
111 foreach (Exception e in re.LoaderExceptions)
112 {
113 c++;
114 m_log.ErrorFormat("[{0}] LoaderException {1}: {2}", Name, c, e.ToString());
115 }
116 }
117 } //if
118 } //foreach
119 }
120
121 public static IScriptEngineComponent GetComponentInstance(string name, params Object[] args)
122 {
123 lock (providers)
124 {
125 if (!providers.ContainsKey(name))
126 throw new Exception("ScriptEngine requested component named \"" + name +
127 "\" that does not exist.");
128 return Activator.CreateInstance(providers[name], args) as IScriptEngineComponent;
129 }
130 }
131
132 private readonly static string nameIScriptEngineRegionComponent = typeof(IScriptEngineRegionComponent).Name; // keep interface name in managed code
133 public static IScriptEngineComponent GetComponentInstance(RegionInfoStructure info, string name, params Object[] args)
134 {
135 IScriptEngineComponent c = GetComponentInstance(name, args);
136
137 // If module is IScriptEngineRegionComponent then it will have one instance per region and we will initialize it
138 if (c.GetType().GetInterface(nameIScriptEngineRegionComponent) != null)
139 ((IScriptEngineRegionComponent)c).Initialize(info);
140
141 return c;
142 }
143
144 }
145}
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