The Mirror Image and Session Facade patterns are useful for changing actors in use case diagrams into valid abstractions in class diagrams, which ultimately results in a cleaner translation to code.
对于将用例图中的参与者转换成类图中有效的抽象，镜像映象模式和会话虚包模式是很有用的，这样最终将能够更清楚地转换成代码。
This applies to a delegated method on an entity EJB, an entity Home method, a session facade, or (as you call it) a DTO assembler class.
这适合于实体e JB、实体home方法、会话外观或(如您所称)D TO装配器类上的已委托的方法。
A session Facade pattern generates a session bean class to serve as the front end of a set of entity bean classes that model business information.
session Facade模式产生一个session bean类作为针对业务信息建模的bean类实体前端。
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