Green.AgileMapper新增-Green.ObjectPickUper(do到dto对象的默认抽取)

     Green.AgileMapper意在处理领域驱动开发中对象之间的Mapper(如果你还不了解Green.AgileMapper，从这里开始Green.AgileMapper开源项目的使用(1) 和Green.AgileMapper项目(2)-新增DO和DTO代码生成，项目地址：CodePlex http://agilemapper.codeplex.com/)，本项目在后期会针对领域建模提供设计时候支持，利用EF和NHibernate作为底层ORM框架产生自己的领域框架，在设计时才会采用这些组件。

    在我们的领域驱动开发中，DomainObject（领域对象）是一个自然oo对象，存在许多现实世界的关系关联，在我们的View端一个View却可能需要数据并不是所有关联。经常除非特殊的UI模式，我们ViewObject往往都会被弱化，而利用Data Transfer Object代替。我们的dto从do抽取大多时候都是将do 单一Object平面化，对于级联删除更新的集合抽取，非级联集合放弃。Green.ObjectPickUper就是一种由do抽取dto的实现策略，产生符合Green.AgileMapper 映射规则的dto对象。对象抽取可能存在多样性，这里只是实现了默认抽取规则，可能不能满足你的需求，你不需要急，因为在这里采用了策略模式来满足不同抽取算法的需求（ObjectPickUperBase），Green.ObjectPickUper并不依赖Green.AgileMapper你可以自由抽取。

  在Green.ObjectPickUper中利用了CodeDom实现代码生成，所以可以支持多语言（如果你还不了解CodeDom可以看这里代码生成技术-目录中CodeDom篇）。

 

我们看看单元测试看看Green.ObjectPickUper的简洁书写：

测试do对象仍是原对象StudentDo，参考CodePlex http://agilemapper.codeplex.com/

[TestMethod] 
      public void ObjectPickUper_GenCode_Test() 
      { 
          ObjectPickUperManager.Instance.IsSOAObject = false; 
          var str = ObjectPickUperManager.Instance.PickUp<StudenDo>("DTO"); 
          var str1 = ObjectPickUperManager.Instance.PickUp<ContactWay>("DTO"); 
          var str2 = ObjectPickUperManager.Instance.PickUp<KeyValuePair>("DTO"); 

          Assert.IsTrue(!string.IsNullOrEmpty(str)); 

          //验证编译是否正确 
          CompilerParameters option = new CompilerParameters(); 
          option.GenerateExecutable = false; 
          option.GenerateInMemory = true; 
          option.IncludeDebugInformation = false; 
          option.ReferencedAssemblies.Add("System.dll"); 
          option.ReferencedAssemblies.Add(typeof(System.Linq.IQueryable).Assembly.Location); 
          option.ReferencedAssemblies.Add(typeof(StudenDo).Assembly.Location); 
          option.ReferencedAssemblies.Add(typeof(Green.AgileMapper.CollectionMappingAttribute).Assembly.Location); 

          var result = CodeDomProvider.CreateProvider("c#").CompileAssemblyFromSource(option, str, str1, str2); 
          var assembly = result.CompiledAssembly; 
          Assert.IsFalse(result.Errors.HasErrors, "编译错误"); 
      }

这里采用CodeDom动态编译，查看是否存在编译错误。 

生成dto：

namespace Green.AgileMapper.Test 
{ 
    using System; 
    using System.Collections.Generic; 
    using System.Linq; 
    using System.Text; 
    [System.SerializableAttribute()] 
    public class StudenDoDTO : System.ComponentModel.INotifyPropertyChanged, System.ICloneable 
    { 
        private int _ID; 
        private Green.AgileMapper.Test.Sex _Sex; 
        private System.Collections.Generic.List<System.String> _CourseIds; 
        private string _AddressCountry; 
        private string _AddressProvince; 
        private string _AddressStreet; 
        private string _AddressParticular; 
        private Green.AgileMapper.Test.ContactWayDTO _ContactWay; 
        private System.Collections.Generic.List<Green.AgileMapper.Test.KeyValuePairDTO> _Propertys; 
        public int ID 
        { 
            get 
            { 
                return this._ID; 
            } 
            set 
            { 
                if ((this._ID != value)) 
                { 
                    this._ID = value; 
                    this.OnNotifyPropertyChanged("ID"); 
                } 
            } 
        } 
        public Green.AgileMapper.Test.Sex Sex 
        { 
            get 
            { 
                return this._Sex; 
            } 
            set 
            { 
                if ((this._Sex != value)) 
                { 
                    this._Sex = value; 
                    this.OnNotifyPropertyChanged("Sex"); 
                } 
            } 
        } 
        [Green.AgileMapper.CollectionMappingAttribute(Name="CourseIds", IsConvertTo=true, IsConvertFrom=true, IsDeleteNotInFromItem=true)] 
        public System.Collections.Generic.List<System.String> CourseIds 
        { 
            get 
            { 
                return this._CourseIds; 
            } 
            set 
            { 
                if ((this._CourseIds != value)) 
                { 
                    this._CourseIds = value; 
                    this.OnNotifyPropertyChanged("CourseIds"); 
                } 
            } 
        } 
        [Green.AgileMapper.MappingAttribute(Name="Address.Country", IsConvertTo=true, IsConvertFrom=true)] 
        public string AddressCountry 
        { 
            get 
            { 
                return this._AddressCountry; 
            } 
            set 
            { 
                if ((this._AddressCountry != value)) 
                { 
                    this._AddressCountry = value; 
                    this.OnNotifyPropertyChanged("AddressCountry"); 
                } 
            } 
        } 
        [Green.AgileMapper.MappingAttribute(Name="Address.Province", IsConvertTo=true, IsConvertFrom=true)] 
        public string AddressProvince 
        { 
            get 
            { 
                return this._AddressProvince; 
            } 
            set 
            { 
                if ((this._AddressProvince != value)) 
                { 
                    this._AddressProvince = value; 
                    this.OnNotifyPropertyChanged("AddressProvince"); 
                } 
            } 
        } 
        [Green.AgileMapper.MappingAttribute(Name="Address.Street", IsConvertTo=true, IsConvertFrom=true)] 
        public string AddressStreet 
        { 
            get 
            { 
                return this._AddressStreet; 
            } 
            set 
            { 
                if ((this._AddressStreet != value)) 
                { 
                    this._AddressStreet = value; 
                    this.OnNotifyPropertyChanged("AddressStreet"); 
                } 
            } 
        } 
        [Green.AgileMapper.MappingAttribute(Name="Address.Particular", IsConvertTo=true, IsConvertFrom=true)] 
        public string AddressParticular 
        { 
            get 
            { 
                return this._AddressParticular; 
            } 
            set 
            { 
                if ((this._AddressParticular != value)) 
                { 
                    this._AddressParticular = value; 
                    this.OnNotifyPropertyChanged("AddressParticular"); 
                } 
            } 
        } 
        [Green.AgileMapper.ObjectMappingAttribute(Name="ContactWay")] 
        public Green.AgileMapper.Test.ContactWayDTO ContactWay 
        { 
            get 
            { 
                return this._ContactWay; 
            } 
            set 
            { 
                if ((this._ContactWay != value)) 
                { 
                    this._ContactWay = value; 
                    this.OnNotifyPropertyChanged("ContactWay"); 
                } 
            } 
        } 
        [Green.AgileMapper.CollectionMappingAttribute(Name="Propertys", IsConvertTo=true, IsConvertFrom=true, IsDeleteNotInFromItem=true, EqualExpression=null)] 
        public System.Collections.Generic.List<Green.AgileMapper.Test.KeyValuePairDTO> Propertys 
        { 
            get 
            { 
                return this._Propertys; 
            } 
            set 
            { 
                if ((this._Propertys != value)) 
                { 
                    this._Propertys = value; 
                    this.OnNotifyPropertyChanged("Propertys"); 
                } 
            } 
        } 
        public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged; 
        public void OnNotifyPropertyChanged(string property) 
        { 
            if ((this.PropertyChanged != null)) 
            { 
                this.PropertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(property)); 
            } 
        } 
        public object Clone() 
        { 
            StudenDoDTO cloneObj; 
            cloneObj = new StudenDoDTO(); 
            cloneObj._ID = this.ID; 
            cloneObj._Sex = this.Sex; 
            System.Collections.Generic.List<System.String> CourseIdsList; 
            CourseIdsList = new System.Collections.Generic.List<System.String>(); 
            if ((this.CourseIds != null)) 
            { 
                int i; 
                for (i = 0; (i < this.CourseIds.Count); i = (i + 1)) 
                { 
                    CourseIdsList.Add(this.CourseIds[i]); 
                } 
            } 
            cloneObj._CourseIds = CourseIdsList; 
            cloneObj._AddressCountry = this.AddressCountry; 
            cloneObj._AddressProvince = this.AddressProvince; 
            cloneObj._AddressStreet = this.AddressStreet; 
            cloneObj._AddressParticular = this.AddressParticular; 
            cloneObj._ContactWay = ((Green.AgileMapper.Test.ContactWayDTO)(this.ContactWay.Clone())); 
            System.Collections.Generic.List<Green.AgileMapper.Test.KeyValuePairDTO> PropertysList; 
            PropertysList = new System.Collections.Generic.List<Green.AgileMapper.Test.KeyValuePairDTO>(); 
            if ((this.Propertys != null)) 
            { 
                int i; 
                for (i = 0; (i < this.Propertys.Count); i = (i + 1)) 
                { 
                    PropertysList.Add(((Green.AgileMapper.Test.KeyValuePairDTO)(this.Propertys[i].Clone()))); 
                } 
            } 
            cloneObj._Propertys = PropertysList; 
            return cloneObj; 
        } 
    } 
}

源代码参加：CodePlex http://agilemapper.codeplex.com/ 

其他相关博文：

1：Green.AgileMapper开源项目的使用(1)

2：Green.AgileMapper项目(2)-新增DO和DTO代码生成

3：代码生成技术-目录