Component語義

　　使用ConfORM“映射”組件，我們無需特別設置，ConfORM內部會根據Domain定義來判定組件，一般而言，沒有主鍵的類就是組件。

[Test]
public void ComponentMappingDemo()
{
    //show how work with components and how ConfORM understands OOP
    var orm = new ObjectRelationalMapper();
    var mapper = new Mapper(orm);
    //use the definition of table-to-class strategy class by class
    orm.TablePerClass<Person>();
    // Show the mapping to the console
    var mapping = mapper.CompileMappingFor(new[] { typeof(Person) });
    Console.Write(mapping.AsString());
}

　　一些Domain范例

　　我們使用各種集合定義Domain：

　　1.Mapping a class with components

　　Person實體有兩個組件：

public class Person
{
    public int Id { get; set; }
    public Name Name { get; set; }
    public Address Address { get; set; }
}

public class Name
{
    public string First { get; set; }
    public string Last { get; set; }
}
public class Address
{
    public string Street { get; set; }
    public int CivicNumber { get; set; }
}

　　Mapping

　　輸出HbmMapping的映射字符串結果：

　　2.Mapping a class with double usage of same component

　　在上面Domain的基礎上新增一個Name類型的屬性：

public class Person
{
    public int Id { get; set; }
    public Name Name { get; set; }
    public Name ShowBusinessAlias { get; set; }
    public Address Address { get; set; }
}

　　Mapping

　　輸出HbmMapping的映射字符串結果：

　　3.Collection of components

　　使用一個集合，而不是單一組件：

public class Person
{
    private Iesi.Collections.Generic.ISet<Address> addresses;
    public Person()
    {
        addresses = new Iesi.Collections.Generic.HashedSet<Address>();
    }
    public int Id { get; set; }
    public Name Name { get; set; }
    public ICollection<Address> Addresses { get { return addresses; } }
}

　　Mapping

　　輸出HbmMapping的映射字符串結果：

　　4.Bidirectional relation

　　實現實體與組件的雙向關聯關系：

public class Person
{
    public int Id { get; set; }
    public Name Name { get; set; }
    public Name ShowBusinessAlias { get; set; }
    public Address Address { get; set; }
}
public class Name
{
    public Person Person { get; set; }
    public string First { get; set; }
    public string Last { get; set; }
}

　　Mapping

　　輸出HbmMapping的映射字符串結果：

　　結語

　　這篇文章展示ConfORM的Components語義應用，映射了一些Domain示例。接下來繼續介紹ConfORM。Are you ConfORM?

　　參考資料

　　Fabio Maulo：ConfORM:“Mapping” Components