/// <summary>
/// Creates and Caches the ConstructorInfo for the specified provider.
/// </summary>
public static ConstructorInfo CreateConstructorInfo(Provider dataProvider)
{
// The assembly should be in \bin or GAC, so we simply need
// to get an instance of the type
//
CSConfiguration config = CSConfiguration.GetConfig();
ConstructorInfo providerCnstr = null;
try
{
//string providerTypeName = ((Provider) config.Providers[providerName]).Type;
Type type = Type.GetType( dataProvider.Type );
// Insert the type into the cache
//
Type[] paramTypes = new Type[2];
paramTypes[0] = typeof(string);
paramTypes[1] = typeof(string);
providerCnstr = type.GetConstructor(paramTypes);
}
catch
{
ProviderException(dataProvider.Name);
}
if(providerCnstr == null)
ProviderException(dataProvider.Name);
return providerCnstr;
}
public static CommonDataProvider Instance(Provider dataProvider)
{
CommonDataProvider fdp = CSCache.Get(dataProvider.Name) as CommonDataProvider;
if(fdp == null)
{
fdp = DataProviders.Invoke(dataProvider) as CommonDataProvider;
CSCache.Max(dataProvider.Name,fdp);
}
return fdp;
}
/// <summary>
/// Creates an instance of the provider using Activator. This instance should be
/// cached since it is an expesivie operation
/// </summary>
public static object CreateInstance(Provider dataProvider, params object[] args )
{
//Get the type
Type type = Type.GetType(dataProvider.Type);
object newObject = null;
if(type != null)
{
if(args != null)
newObject = Activator.CreateInstance(type, args);
else
newObject = Activator.CreateInstance(type);
}
if(newObject == null) //If we can not create an instance, throw an exception
ProviderException(dataProvider.Name);
return newObject;
}
public static ExtensionModule Instance(Provider provider)
{
try
{
if(provider == null)
return null;
// Use the cache because the reflection used later is expensive
//
string cacheKey = "Module-" + provider.Name;
ConstructorInfo constructor = CSCache.Get(cacheKey) as ConstructorInfo;
ExtensionModule module = null;
// Is the module already cached?
//
if(constructor == null)
{
Type type = Type.GetType( provider.Type );
if(type == null)
return null;
constructor = type.GetConstructor(Type.EmptyTypes);
// Insert the type into the cache
//
CSCache.Max(cacheKey, constructor); //Did not have a cache time specified
}
module = (ExtensionModule)constructor.Invoke(null);
// Initialize the module for the request
//
module.Init(provider);
return module;
}
catch
{
return null;
}
}
/// <summary>
/// Creates an instance of the provider using Activator. This instance should be
/// cached since it is an expesivie operation
/// </summary>
public static object CreateInstance(Provider dataProvider)
{
//Find the current attributes
string connectionString = null; //dataProvider.Attributes["connectionString"];
string databaseOwner = null;// dataProvider.Attributes["databaseOwner"];
GetDataStoreParameters(dataProvider, out connectionString, out databaseOwner);
//Get the type
Type type = Type.GetType(dataProvider.Type);
object newObject = null;
if(type != null)
{
newObject = Activator.CreateInstance(type,new object[]{databaseOwner,connectionString});
}
if(newObject == null) //If we can not create an instance, throw an exception
ProviderException(dataProvider.Name);
return newObject;
}
/// <summary>
/// Creates an instance of the provider using Activator. This instance should be
/// cached since it is an expesivie operation
/// </summary>
public static object CreateInstance(Provider dataProvider)
{
return CreateInstance(dataProvider, null);
}
public abstract void Init(Provider provider);
private static void GetDataStoreParameters(Provider dataProvider, out string connectionString, out string databaseOwner)
{
databaseOwner = dataProvider.Attributes["databaseOwner"];
if(databaseOwner == null || databaseOwner.Trim().Length == 0)
databaseOwner = ConfigurationSettings.AppSettings[dataProvider.Attributes["databaseOwnerStringName"]];
connectionString = dataProvider.Attributes["connectionString"];
if(connectionString == null || connectionString.Trim().Length == 0)
connectionString = ConfigurationSettings.AppSettings[dataProvider.Attributes["connectionStringName"]];
}
/// <summary>
/// Creates an instance of the specified provider using the Cached
/// ConstructorInfo from CreateConstructorInfo
/// </summary>
public static object Invoke(Provider dataProvider)
{
object[] paramArray = new object[2];
string dbOwner = null;
string connstring = null;
GetDataStoreParameters(dataProvider, out connstring, out dbOwner);
paramArray[0] = dbOwner;
paramArray[1] = connstring;
return CreateConstructorInfo(dataProvider).Invoke(paramArray);
}
