Prism框架需要在应用程序启动的时候进行一些初始化的工作，Bootstrapper就是来做这些的，是其切入点。
Bootstrapper主要要做的事有：创建和配置module catalog，创建DI Container，为UI配置默认的region适配器，创建和初始化shell以及初始化module。
/// <summary>
/// Base class that provides a basic bootstrapping sequence and hooks
/// that specific implementations can override
/// </summary>
/// <remarks>
/// This class must be overridden to provide application specific configuration.
/// </remarks>
public abstract class Bootstrapper
{
/// <summary>
/// Gets the <see cref="ILoggerFacade"/> for the application.
/// </summary>
/// <value>A <see cref="ILoggerFacade"/> instance.</value>
protected ILoggerFacade Logger { get; set; }
/// <summary>
/// Gets the default <see cref="IModuleCatalog"/> for the application.
/// </summary>
/// <value>The default <see cref="IModuleCatalog"/> instance.</value>
protected IModuleCatalog ModuleCatalog { get; set; }
/// <summary>
/// Gets the shell user interface
/// </summary>
/// <value>The shell user interface.</value>
protected DependencyObject Shell { get; set; }
/// <summary>
/// Create the <see cref="ILoggerFacade" /> used by the bootstrapper.
/// </summary>
/// <remarks>
/// The base implementation returns a new TextLogger.
/// </remarks>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Reliability", "CA2000:Dispose objects before losing scope", Justification = "The Logger is added to the container which will dispose it when the container goes out of scope.")]
protected virtual ILoggerFacade CreateLogger()
{
return new TextLogger();
}
/// <summary>
/// Runs the bootstrapper process.
/// </summary>
public void Run()
{
this.Run(true);
}
/// <summary>
/// Creates the <see cref="IModuleCatalog"/> used by Prism.
/// </summary>
/// <remarks>
/// The base implementation returns a new ModuleCatalog.
/// </remarks>
protected virtual IModuleCatalog CreateModuleCatalog()
{
return new ModuleCatalog();
}
/// <summary>
/// Configures the <see cref="IModuleCatalog"/> used by Prism.
/// </summary>
protected virtual void ConfigureModuleCatalog()
{
}
/// <summary>
/// Registers the <see cref="Type"/>s of the Exceptions that are not considered
/// root exceptions by the <see cref="ExceptionExtensions"/>.
/// </summary>
protected virtual void RegisterFrameworkExceptionTypes()
{
ExceptionExtensions.RegisterFrameworkExceptionType(
typeof(Microsoft.Practices.ServiceLocation.ActivationException));
}
/// <summary>
/// Initializes the modules. May be overwritten in a derived class to use a custom Modules Catalog
/// </summary>
protected virtual void InitializeModules()
{
IModuleManager manager = ServiceLocator.Current.GetInstance<IModuleManager>();
manager.Run();
}
/// <summary>
/// Configures the default region adapter mappings to use in the application, in order
/// to adapt UI controls defined in XAML to use a region and register it automatically.
/// May be overwritten in a derived class to add specific mappings required by the application.
/// </summary>
/// <returns>The <see cref="RegionAdapterMappings"/> instance containing all the mappings.</returns>
protected virtual RegionAdapterMappings ConfigureRegionAdapterMappings()
{
RegionAdapterMappings regionAdapterMappings = ServiceLocator.Current.GetInstance<RegionAdapterMappings>();
if (regionAdapterMappings != null)
{
regionAdapterMappings.RegisterMapping(typeof(Selector), ServiceLocator.Current.GetInstance<SelectorRegionAdapter>());
regionAdapterMappings.RegisterMapping(typeof(ItemsControl), ServiceLocator.Current.GetInstance<ItemsControlRegionAdapter>());
regionAdapterMappings.RegisterMapping(typeof(ContentControl), ServiceLocator.Current.GetInstance<ContentControlRegionAdapter>());
}
return regionAdapterMappings;
}
/// <summary>
/// Configures the <see cref="IRegionBehaviorFactory"/>.
/// This will be the list of default behaviors that will be added to a region.
/// </summary>
protected virtual IRegionBehaviorFactory ConfigureDefaultRegionBehaviors()
{
var defaultRegionBehaviorTypesDictionary = ServiceLocator.Current.GetInstance<IRegionBehaviorFactory>();
if (defaultRegionBehaviorTypesDictionary != null)
{
defaultRegionBehaviorTypesDictionary.AddIfMissing(BindRegionContextToDependencyObjectBehavior.BehaviorKey,
typeof(BindRegionContextToDependencyObjectBehavior));
defaultRegionBehaviorTypesDictionary.AddIfMissing(RegionActiveAwareBehavior.BehaviorKey,
typeof(RegionActiveAwareBehavior));
defaultRegionBehaviorTypesDictionary.AddIfMissing(SyncRegionContextWithHostBehavior.BehaviorKey,
typeof(SyncRegionContextWithHostBehavior));
defaultRegionBehaviorTypesDictionary.AddIfMissing(RegionManagerRegistrationBehavior.BehaviorKey,
typeof(RegionManagerRegistrationBehavior));
defaultRegionBehaviorTypesDictionary.AddIfMissing(RegionMemberLifetimeBehavior.BehaviorKey,
typeof(RegionMemberLifetimeBehavior));
defaultRegionBehaviorTypesDictionary.AddIfMissing(ClearChildViewsRegionBehavior.BehaviorKey,
typeof(ClearChildViewsRegionBehavior));
defaultRegionBehaviorTypesDictionary.AddIfMissing(AutoPopulateRegionBehavior.BehaviorKey,
typeof(AutoPopulateRegionBehavior));
}
return defaultRegionBehaviorTypesDictionary;
}
/// <summary>
/// Initializes the shell.
/// </summary>
protected virtual void InitializeShell()
{
}
/// <summary>
/// Run the bootstrapper process.
/// </summary>
/// <param name="runWithDefaultConfiguration">If <see langword="true"/>, registers default
/// Prism Library services in the container. This is the default behavior.</param>
public abstract void Run(bool runWithDefaultConfiguration);
/// <summary>
/// Creates the shell or main window of the application.
/// </summary>
/// <returns>The shell of the application.</returns>
/// <remarks>
/// If the returned instance is a <see cref="DependencyObject"/>, the
/// <see cref="Bootstrapper"/> will attach the default <see cref="IRegionManager"/> of
/// the application in its <see cref="RegionManager.RegionManagerProperty"/> attached property
/// in order to be able to add regions by using the <see cref="RegionManager.RegionNameProperty"/>
/// attached property from XAML.
/// </remarks>
protected abstract DependencyObject CreateShell();
/// <summary>
/// Configures the LocatorProvider for the <see cref="Microsoft.Practices.ServiceLocation.ServiceLocator" />.
/// </summary>
protected abstract void ConfigureServiceLocator();
}