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Download Eclipse Modeling Framework by Dave Steinberg, Frank Budinsky, Marcelo Paternostro, Ed PDF

By Dave Steinberg, Frank Budinsky, Marcelo Paternostro, Ed Merks

EMF is a strong framework and code iteration facility for development Java functions according to basic version definitions. Designed to make modeling functional and precious to the mainstream Java programmer, EMF unifies 3 vital applied sciences: Java, XML, and UML. versions can both be outlined utilizing a UML modeling instrument, an XML Schema, or by way of specifying uncomplicated annotations on Java interfaces wherein programmers write the summary interfaces (a small subset of what they'd generally have to write), and the remainder is generated immediately and merged again into their present code. This ebook completely describes EMF and indicates how EMF-based modeling is a beginning for fine-grained interoperability and knowledge sharing between instruments and purposes. The authors supply a simple evaluate of crucial recommendations in EMF and modeling in addition to transparent factors with step by step directions for outlining EMF types. This ebook indicates how the Eclipse Modeling Framework (EMF) has effectively bridged the space among modelers and Java programmers. It serves as a gradual advent to modeling for Java programmers and whilst a reinforcement of the modeler's idea that lots of Java coding could be computerized, given a suitable device.

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Programming So is EMF simply a framework for describing a model and then generating other things from it? Well, basically yes, but there's an important difference. Unlike most tools of this type, EMF is truly integrated with and tuned for efficient programming. " How's that for a quote? With EMF, modeling and programming can be considered the same thing. Instead of forcing a separation of the high-level engineering/modeling work from the low-level implementation programming, it brings them together as two well-integrated parts of the same job.

To understand how it all fits together we need to look at another important interface in the EMF framework: ResourceSet. A ResourceSet, as its name implies, is a set of resources that are accessed together, in order to allow for potential cross-document references among them. It's also the factory for its resources. getAbsolutePath() , it's used to ensure that we start with an absolute URI that will allow any cross document references that we may serialize to use relative URIs, guaranteeing that our serialized document(s) will be location independent.

2. eContainer() and eResource() return the object's containing object and resource. 3. eGet(), eSet(), eIsSet(), and eUnset() provide an API for accessing the objects reflectively. The first and third items are interesting only if you want to generically access the objects instead of, or in addition to, using the type-safe generated accessors. 4. 2. Other than that, EObject has only a few convenience methods. However, there is one more important thing to notice; EObject extends from yet another interface: public interface EObject extends Notifier { The Notifier interface is also quite small, but it introduces an important characteristic to every modeled object; model change notification as in the Observer Design Pattern [5].

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