fluent-interface

This is a simplified version of Java inherited Fluent method return type in multiple level hierarchies . Given the following code: public enum X { ; static interface BaseFoo<T, S extends BaseFoo<T, S>> { S foo(); } static interface Foo<T> extends BaseFoo<T, Foo<T>> { void foo1(); } static interface BaseBar<T, S extends BaseBar<T, S>> extends BaseFoo<T, S> { S bar(); } static interface Bar<T> extends BaseBar<T, Bar<T>>, Foo<T> { void bar1(); } } run javac X.java I get the error message: X.java:15: error: BaseFoo cannot be inherited with different arguments: <T,X.Bar<T>> and <T,X.Foo<T>> static

I have to admit, the features of EF 4.1 RC Codefirst, DataAnnotations and FluentAPI are still overwhelming to me. Sometimes I really don't know what I am doing ;-) Please see the following POCOs: public class Country { [Key] public Guid ID { get; set; } [Required] public virtual Currency Currency { get; set; } } public class Currency { [Key] public Guid ID { get; set; } public virtual ICollection<Country> Countries { get; set; } } The general idea: Every country needs to have a currency. But a currency does not need to be assigned to a country at all. If you let EF create the corresponding

I have a table with a self reference where the ParentId is an FK to the ID (PK). Using EF (code-first), I've set up my relationship as follows: this.HasOptional(t => t.ParentValue) .WithMany(t => t.ChildValues) .HasForeignKey(t => t.ParentId); When I try to delete the children and its parent, the DELETE commands EF issues to the database are not in the order I expected them to go - it attempts to delete the parent record first. I realize that I have a couple of options here (neither of which I like): Delete child records first, do a full save/commit, and then delete parent record. With the

I have the following two tables: LOCALIZATION Id int Text string DINER Id int Name string Description string Name_LocalizationID int Description_LocationID int Now I want my POCO like this: public class Diner{ public int Id{get;set;} public ICollection<Localization> NameLocalization{get;set;} public ICollection<Localization> DescriptionLocalization{get;set;} } public class Localization{ public int Id{get;set;} public string Text{get;set;} } Question is: How we can map NameLocalization and DescriptionLocalization property to Localization's Id with EF Fluent API? Thanks SQL Server does not

I am trying to subclass str object, and add couple of methods to it. My main purpose is to learn how to do it. Where I am stuck is, am I supposed to subclass string in a metaclass, and create my class with that meta, or subclass str directly? And also, I guess I need to implement __new__() somehow, because, my custom methods will modify my string object, and will return new mystr obj. My class's methods, should be completely chainable with str methods, and should always return a new my class instance when custom methods modified it. I want to be able to do something like this: a = mystr(

How can I store an array of doubles to database using Entity Framework Code-First with no impact on the existing code and architecture design? I've looked at Data Annotation and Fluent API, I've also considered converting the double array to a string of bytes and store that byte to the database in it own column. I cannot access the public double[] Data { get; set; } property with Fluent API, the error message I then get is: The type double[] must be a non-nullable value type in order to use it as parameter 'T'. The class where Data is stored is successfully stored in the database, and the