![]() Finally, we use MoDAr-WA to apply the proposed approach to the MusicStore system case study and compare the generated code from CIM to the original application code.ĭuring the last few years, the REST architectural style has drastically changed the way web services are developed. In particular, we used QVT rules for transformations between models and Acceleo for generating code from models. For this aim, we present a set of meta-models, QVT and Acceleo transformations, as well as the tools used to develop our Eclipse plug-in, MoDAr-WA. This paper is a continuity of our previous works, where we automate transformation from the CIM level to the PIM level. In this paper, we present a tool support, the model-driven architecture for web application (MoDAr-WA), that implements our proposed approach, aiming to automate transformations from the highest MDA level (CIM) to the lowest one (code) to ensure traceability. However, researchers still meet many constraints-model specifications, transformation automation, and level traceability. In this context, several methods and tools were proposed in the literature and in the industry that aim to automatically generate the source code from the MDA levels. MDA aims to generate source code from abstract models through several model transformations between, and inside the different MDA levels: computation independent model (CIM), platform independent model (PIM), and platform specific model (PSM) before code. Thus, the MDE is particularly based on model-driven architecture (MDA), which is one of the important variants of the Object Management Group (OMG). Model-driven engineering (MDE) uses models during the application development process. The architecture of the generated Web applications respects a variant of the well-known Model-View-Controller (MVC) pattern. A proprietary tool (called xGenerator) performs the transformations up to the Java source code. In our approach, the automatic transformations across the MDA’s levels are based on meta-models for two of the most important constructs of UML, namely Use Cases and classes. Moreover, automatic code generation helps the software designers delivering of the software on time. Automatic translation of UML diagrams to the Object-Oriented code is highly desirable because it eliminates the chances of introducing human errors. UML provides a set of diagrams to model structural and behavioral aspects of the Web applications. We adopt the The Unified Modeling Language (UML), as modeling language. A Model Driven Architecture (MDA) approach is proposed in this paper since it simplifies modeling, design, implementation, and integration of applications by defining software mainly at the model level. Lest expand our banking system use case diagram to show include relationships as well.As Web applications become more and more complex, the development costs are increasing as well. The included use case is mandatory and not optional.The base use case is incomplete without the included use case.Few things to consider when using the > relationship. In some situations, this is done to simplify complex behaviors. The main reason for this is to reuse common actions across multiple use cases. Include relationship show that the behavior of the included use case is part of the including (base) use case. Include Relationship Between Two Use Cases Also, they have their own specific behavior to be modeled as a separate use case. These are not optional but depend on the account ledger entry. This might have extending use cases “Add Tax Ledger Entry” and “Add Payment Ledger Entry”. This mostly happens when your modeling complex behaviors.įor example, in an accounting system, one use case might be “Add Account Ledger Entry”. An extending use case can have non-optional behavior as well. Multiple actors can be associated with a single use case.Īlthough extending use case is optional most of the time it is not a must.An actor can be associated with multiple use cases.An actor must be associated with at least one use case.This one is straightforward and present in every use case diagram. Let’s take a look at these relationships in detail. There can be 5 relationship types in a use case diagram. If you want to draw them while learning you can use our tool to create use case diagrams. To get a deeper understanding of use cases, check out our use case diagram tutorial. This article will look into various use case diagram relationships in detail and explain them using examples. In fact many tend to confuse >, > and generalization. When it comes to drawing use case diagrams one area many struggles with is showing various relationships in use case diagrams.
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