Summary Central controller mediates application flow Controller delegates to appropriate handler Handlers are tied to model components Model encapsulates business logic Control forwarded back through…

Hibernate is an open source object/relational mapping tool for Java. Hibernate lets you develop persistent classes following common Java idiom – including association, inheritance, polymorphism,…

J2EE Patterns In software engineering, a design pattern is a general repeatable solution to a commonly-occurring problem in software design. A design pattern isn’t a…

1.Test if the value of a certain node is empty Depends what you mean by empty. Contains no child nodes: not(node()) Contains no text content:…