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&lt;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 &lt; 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