delegation pattern

As a result , we might opt to refactor the convenience layer API by using a delegation design pattern instead of inheritance .

因此，我们重构了便利层API，使用委托设计模式而不是继承。

Delegation : A pattern where one object periodically sends messages to another object that is specified as its delegate .

Delegation：一个模式，其中，一个对象定期发送消息到另一个被指定作为其代理的对象。

Research and Implement of RBAC Model on User Delegation Mechanism in ASP Pattern

ASP模式下基于用户授权代理机制的RBAC模型的研究与实现