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using System.Data.Linq;
using System.Data.Objects;
using System.Globalization;
using System.Web.Resources;
namespace System.Web.DynamicData.ModelProviders {
internal class SchemaCreator {
private static SchemaCreator s_instance = new SchemaCreator();
public static SchemaCreator Instance {
get {
return s_instance;
}
}
public virtual DataModelProvider CreateDataModel(object contextInstance, Func<object> contextFactory) {
if (IsDataContext(contextInstance.GetType())) {
return new DLinqDataModelProvider(contextInstance, contextFactory);
}
if (IsObjectContext(contextInstance.GetType())) {
return new EFDataModelProvider(contextInstance, contextFactory);
}
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, DynamicDataResources.SchemaCreator_UnknownModel, contextInstance.GetType().FullName));
}
public virtual bool ValidDataContextType(Type contextType) {
//
return IsDataContext(contextType) || IsObjectContext(contextType);
}
internal static bool IsDataContext(Type contextType) {
return IsValidType<DataContext>(contextType);
}
internal static bool IsObjectContext(Type contextType) {
return IsValidType<ObjectContext>(contextType);
}
private static bool IsValidType<T>(Type contextType) where T : class {
return contextType != null && typeof(T).IsAssignableFrom(contextType);
}
}
}
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