Spring.NET IoC内建对NHibernate的支持,有个NHibernateTemplate,对应配置文件如下。
<object id="HibernateTemplate" type="Spring.Data.NHibernate.Generic.HibernateTemplate,Spring.Data.NHibernate32"> <property name="SessionFactory" ref="NHibernateSessionFactory" /> <property name="TemplateFlushMode" value="Auto" /> <property name="CacheQueries" value="true" /> </object>
里面会需要一个SessionFactory,这东西的配置如下
<object id="CallCenterSessionFactory" type="Spring.Data.NHibernate.LocalSessionFactoryObject, Spring.Data.NHibernate32"> <property name="DbProvider" ref="CallCenterDBProvider"/> <property name="MappingAssemblies"> <list> <value>ds.callcenter.fire.DataModel</value> </list> </property> ...
但是很遗憾,它里面的MappingAssemblies只支持hbm.xml文件的映射,如何映射ByCode方式的Mapping类呢?
思路是扩展LocalSessionFactoryObject,它很好的考虑了映射的扩展性,提供了PostProcessMappings方法以提供扩展,实现如下:
public class NH32LocalSessionFactoryObject : LocalSessionFactoryObject { public string[] ByCodeMappingAssemblies { set { this.byCodeMappingAssemblies = value; } } public System.Type[] ByCodeMappingTypes { set { this.byCodeMappingTypes = value; } } protected override void PostProcessMappings(Configuration config) { base.PostProcessMappings(config); buildByCodeMappings(config); } private void buildByCodeMappings(Configuration config) { //添加byCode方式的程序集 if (this.byCodeMappingAssemblies != null) { var mapper = new ModelMapper(); foreach (var p in byCodeMappingAssemblies) { mapper.AddMappings(Assembly.Load(p).GetExportedTypes()); } var hbmMapping = mapper.CompileMappingForAllExplicitlyAddedEntities(); config.AddDeserializedMapping(hbmMapping, null); } //添加byCode方式的类型集 if (this.byCodeMappingTypes != null) { var mapper = new ModelMapper(); mapper.AddMappings(byCodeMappingTypes); var hbmMapping = mapper.CompileMappingForAllExplicitlyAddedEntities(); config.AddDeserializedMapping(hbmMapping, null); } } private string[] byCodeMappingAssemblies; private System.Type[] byCodeMappingTypes; }
那新一代的配置文件就是这样的了
<object id="NHibernateSessionFactory" type="ds.gis.user.dal.NH32LocalSessionFactoryObject, ds.gis.user.dal"> <property name="DbProvider" ref="DbProvider"/> <property name="ByCodeMappingAssemblies"> <list> <value>ds.gis.user.dal</value> </list> </property> <property name="ByCodeMappingTypes"> <list> <!--<value>ds.gis.user.dal.mappings.cfg.RegionMap</value>--> </list> </property> ...
里面新增了ByCodeMappingAssemblies和ByCodeMappingTypes的节点,它可以读取ByCode方式的映射类了。