/// <summary>
/// Loads an assembly and determines if it contains an object that implements the module interface.
/// </summary>
/// <param name="path">Full path and name of the assembly to load</param>
/// <returns>Information about the object that implements the module interface if one could be found in the assembly.</returns>
public GameModuleInfo LoadAssembly(string path)
{
GameModuleInfo result = null;
Assembly asm = Assembly.LoadFrom(path);
Type[] types = asm.GetExportedTypes();
foreach (Type t in types)
{
if ((t.GetInterface("IGameModule") != null) && !t.IsAbstract)
{
object tempObj = Activator.CreateInstance(t);
result = new GameModuleInfo();
result.Name = t.GetProperty("Name").GetValue(tempObj, null).ToString();
result.IdentityCode = t.GetProperty("IdentityCode").GetValue(tempObj, null).ToString();
result.Priority = (int)t.GetProperty("Priority").GetValue(tempObj, null);
result.IsRequired = (t.GetProperty("IsRequired").GetValue(tempObj, null) as bool?) == true ? true : false;
result.ObjectClassType = t.FullName;
}
}
return(result);
}
/// <summary>
/// Loads in the module class libraries.
/// </summary>
/// <returns>A flag indicating if the modules were successfully loaded. If false the application should be shut down.</returns>
private bool LoadModules()
{
List <GameModuleInfo> availableModules = new List <GameModuleInfo>();
HashSet <string> dependentModules = new HashSet <string>();
int modulesToLoad = 0;
// build a temporary domain to check the modules to load.
string pathToDll = Assembly.GetExecutingAssembly().CodeBase;
AppDomainSetup domainSetup = new AppDomainSetup {
PrivateBinPath = pathToDll
};
AppDomain domain = AppDomain.CreateDomain("TempDomain", null, domainSetup);
InstanceProxy proxy = domain.CreateInstanceAndUnwrap(Assembly.GetAssembly(typeof(InstanceProxy)).FullName, typeof(InstanceProxy).ToString()) as InstanceProxy;
if (proxy != null)
{
DirectoryInfo di = new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory);
foreach (FileInfo fi in di.GetFiles("*.dll"))
{
GameModuleInfo m = proxy.LoadAssembly(fi.Name);
if (m != null)
{
if ((AppObjects.Constants as AppConstants).ModulesToBeLoaded.Contains(m.Name.Replace(" ", string.Empty)) || m.IsRequired)
{
m.Load = true;
modulesToLoad++;
}
#if DEBUG
// In debug always load all modules.
m.Load = true;
#endif
m.CodeBase = fi.Name;
availableModules.Add(m);
}
}
}
// Verify that all dependent modules are loaded.
if (modulesToLoad != 0)
{
#if DEBUG
/* todo:
* if ((AppObjects.Overrides != null) && AppObjects.Overrides.SelectModules)
* {
* using (System.Windows.Forms.FrmLoadModules frm = new System.Windows.Forms.FrmLoadModules(availableModules, dependentModules))
* {
* if (frm.ShowDialog() == DialogResult.OK)
* {
* availableModules = frm.GetModulesToLoad();
* }
* }
* }*/
#endif
}
// Finally load the needed modules into the current domain.
foreach (GameModuleInfo mi in availableModules.OrderBy(m => m.Priority))
{
if (!string.IsNullOrEmpty(mi.CodeBase) && mi.Load)
{
// Add the module to the dispose wrapper so they get disposed with the form.
// todo: this.disposeWrapper1.ItemsToDispose.Add(m);
Assembly a = Assembly.LoadFrom(mi.CodeBase);
IGameModule m = Activator.CreateInstance(a.GetType(mi.ObjectClassType)) as IGameModule;
(AppObjects.Constants as AppConstants).LoadedModules.Add(m);
}
}
AppDomain.Unload(domain);
return((AppObjects.Constants as AppConstants).LoadedModules.Count > 0);
}