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