INTERVIEW QUESTIONS J2EE ECLIPSE DETAILS

Question: What is EMF?

Answer: The Eclipse Modeling Framework is a Java/XML framework for generating tools and other applications based on simple class models. EMF helps you rapidly turn models into efficient, correct, and easily customizable Java code. It is intended to provide the benefits of formal modeling, but with a very low cost of entry. In addition to code generation, it provides the ability to save objects as XML documents for interchange with other tools and applications.

Models can be created using annotated Java, XML documents, or modeling tools like Rational Rose, then imported into EMF. The code generator turns a model into a set of Java implementation classes. These classes are extensible and regenerable - you can modify them by adding user-defined methods and instance variables. When the model changes, you can regenerate the implementation classes, and your modifications will be retained. This works both ways - changes in the Java code can be used to update the model.

The Eclipse Modeling Framework is a Java/XML framework for generating tools and other applications based on simple class models. EMF helps you rapidly turn models into efficient, correct, and easily customizable Java code. It is intended to provide the benefits of formal modeling, but with a very low cost of entry. In addition to code generation, it provides the ability to save objects as XML documents for interchange with other tools and applications.

Models can be created using annotated Java, XML documents, or modeling tools like Rational Rose, then imported into EMF. The code generator turns a model into a set of Java implementation classes. These classes are extensible and regenerable - you can modify them by adding user-defined methods and instance variables. When the model changes, you can regenerate the implementation classes, and your modifications will be retained. This works both ways - changes in the Java code can be used to update the model. Source: CoolInterview.com

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