iBATIS.NET 学习笔记(十)

Data Map (.NET)：
Example：

<? xml version="1.0" encoding="UTF-8"  ?>
   < sqlMap  namespace ="Product"  
xmlns ="http://ibatis.apache.org/mapping"  
xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"   >

   < alias >
     < typeAlias  alias ="Product"  type ="Example.Domain.Product, Example.Domain"   />
   </ alias >

   <!--  keeps the result of the last one thousand of these queries in active memory for up to 24 hours -->
   < cacheModels >
     < cacheModel  id ="productCache"  type ="LRU" >
       < flushInterval  hours ="24" />
       < property  name ="CacheSize"  value ="1000"   />
     </ cacheModel >
   </ cacheModels >

    <!-- maps the columns to our object properties -->
    < resultMaps >
     < resultMap  id ="productResult"  class ="Product" >
       < result  property ="Id"  column ="Product_Id" />
       < result  property ="Description"  column ="Product_Description" />
     </ resultMap >
    </ resultMaps >

   < statements >
     < select  id ="GetProduct"  parameterMap ="productParam"  cacheModel ="productCache" >
      select * from Products where Product_Id = ?
     </ select >
   </ statements >

   <!-- maps the SQL "?" to the product Id property -->
   < parameterMaps >
     < parameterMap  id ="productParam"  class ="Product" >
       < parameter  property ="Id" />
     </ parameterMap >
   < parameterMaps >

</ sqlMap >

Mapped Statements
Mapped Statements can hold any SQL statement and can use Parameter Maps and Result Maps for input and output. (A stored procedure is a specialized form of a statement.）

Statement element syntax
< statement  id ="statement.name"
  [parameterMap ="parameterMap.name" ]
  [parameterClass ="alias" ]
  [resultMap ="resultMap.name" ]
  [resultClass ="class.name|alias" ]
  [listClass ="class.name|alias" ]
  [cacheModel ="cache.name" ]
>
  select * from Products where Product_Id = [?|#propertyName#]
  order by [$simpleDynamic$]
</ statement >

[]中的参数是可选项。
下面是6种Statement-type 元素

Statement Element	Attributes	Child Elements	Methods
<statement>	id parameterClass resultClass listClass parameterMap resultMap cacheModel	All dynamic elements	Insert Update Delete All query methods
<insert>	id parameterClass parameterMap	All dynamic elements <selectKey> <generate>	Insert Update Delete
<update>	id parameterClass parameterMap extends	All dynamic elements <generate>	Insert Update Delete
<delete>	id parameterClass parameterMap extends	All dynamic elements <generate>	Insert Update Delete
<select>	id parameterClass resultClass listClass parameterMap resultMap cacheModel extends	All dynamic elements <generate>	All query methods
<procedure>	id parameterMap resultClass resultMap cacheModel	All dynamic elements	Insert Update Delete All query methods