1. 持久对象映射文件关于持久对象映射文件，这里就不多说了，可参考nhibernate的例子和文档。在nhibernate源代码的根目录里有一个nhibernate-mapping-2.0.xsd文档，这个文档是nhibernate用来对映射文件进行验证的，我们也可以借助相关软件用这个文档来验证映射文件的有效性。2. 映射信息的读取通过Configuration类，可以用多种方式读取映射信息，一些以Add开头的方法就是用来加入映射信息的，这些方法最终将调用Add(XmlDocument doc)。//** Configuration.cs **private Hashtable classes = new Hashtable();classes集合用于存放所有的持久对象映射信息，它的Key为持久类的类型；Value为PermissionClass类的子类。private void Add(XmlDocument doc) {   try {      Binder.dialect = Dialect.Dialect.GetDialect(properties);      Binder.BindRoot( doc, CreateMappings());   }    catch (MappingException me) {      log.Error("Could not compile the mapping document", me);      throw me;   } // end try/catch}AddDocument方法调用Binder的静态方法BindRoot来绑定持久类映射信息。CreateMappings返回一个Mappings对象，此对象是一个简单封装了所有映射信息集合的类。3. 建立对象映射信息Binder类的BindRoot用于绑定映射信息中的所有映射内容。//** Binder.cs **public static void BindRoot(XmlDocument doc, Mappings model) {   // ...   foreach(XmlNode n in hmNode.SelectNodes(nsPrefix + ":class", nsmgr) ) {      RootClass rootclass = new RootClass();      Binder.BindRootClass(n, rootclass, model);      model.AddClass(rootclass);   }   // ...}遍历所有的类映射节点，然后调用BindRootClass来绑定类映射信息，最后将类映射信息加到集合中。其中RootClass为PermissionClass的子类。public static void BindRootClass(XmlNode node, RootClass model, Mappings mappings) {   BindClass(node, model, mappings);   //TABLENAME   XmlAttribute tableNameNode = node.Attributes["table"];   string tableName = (tableNameNode==null)         ? StringHelper.Unqualify( model.PersistentClazz.Name )         : tableNameNode.Value;   XmlAttribute schemaNode = node.Attributes["schema"];   string schema = schemaNode==null ? mappings.SchemaName : schemaNode.Value;   Table table = mappings.AddTable(schema, tableName);   model.Table = table;   // ...   PropertiesFromXML(node, model, mappings);}BindRootClass首先调用BindClass绑定持久类映射信息，然后调用PropertiesFromXML来绑定类属性。public static void BindClass(XmlNode node, PersistentClass model, Mappings mapping) {     string className = node.Attributes["name"] == null ? null : node.Attributes["name"].Value;      // class   try {      model.PersistentClazz = ReflectHelper.ClassForName(className);   }    catch ( Exception cnfe ) {      throw new MappingException( "persistent class not found", cnfe);   }   // ...}BindClass通过反射来取得持久对象的类型。protected static void PropertiesFromXML(XmlNode node, PersistentClass model, Mappings mappings) {   string path = model.Name;   Table table = model.Table;   foreach(XmlNode subnode in node.ChildNodes) {      CollectionType collectType = CollectionType.CollectionTypeFromString(name);      Value value = null;      if (collectType!=null) {         value = new Value(table);         BindValue(subnode, value, true);      }       else if ( "many-to-one".Equals(name) ) {         value = new ManyToOne(table);         BindManyToOne(subnode, (ManyToOne) value, propertyName, true);      }       else if ( "any".Equals(name) ) {         value = new Any(table);         BindAny(subnode, (Any) value, true);      }      else if ( "one-to-one".Equals(name) ) {         value = new OneToOne(table, model.Identifier );         BindOneToOne(subnode, (OneToOne) value, true);      }       else if ( "property".Equals(name) ) {         value = new Value(table);         BindValue(subnode, value, true, propertyName);      }       else if ( "component".Equals(name) ) {         value = new Component(model);         BindComponent(subnode, (Component) value, reflectedClass, subpath, true, mappings);      }       else if ( "subclass".Equals(name) ) {         Subclass subclass = new Subclass(model);         BindSubclass( subnode, subclass, mappings );      }       else if ( "joined-subclass".Equals(name) ) {         Subclass subclass = new Subclass(model);         BindJoinedSubclass( subnode, subclass, mappings);      }      if ( value!=null) {         Property prop = new Property(value);         BindProperty(subnode, prop, mappings);      }   }}

遍历所有子节点，然后根据节点类型对进行绑定。(注: 部分内容已删除)关于属性的映射以后有空再详细研究，只需要知道属性已加入到RootClass的Properties属性就行了。