PowerDesigner supports all UML1.3 diagrams including use case diagrams, Sequence diagrams, class diagrams, activity diagrams, and component diagrams, and fully supports UML2.0. The object-oriented analysis and Design (OOAD) analysis method is improved and the integration with the development process is enhanced.
PowerDesigner can help you build traditional business and e-business systems adapted to modern IT development, using new technologies such as Java, Object-oriented languages, and XML to merge with our database technologies in physical or virtual ways. Our goal is to provide you with the ability to access information, control business processes, and to give companies a competitive advantage in any market today, based on your needs.
Our analytical methods and design techniques will be diverse, from business process modeling to UML object-oriented analysis and design, and traditional relational modeling. This article will help you learn more about UML, a powerful technology that can help your organization create efficient traditional business and e-business systems.
Object-Oriented analysis
Before you are ready to invest in systems and software for your enterprise, you must first understand the actual needs of the enterprise and how the technology deployed will help your business achieve greater success.
You can use UML to analyze using use case diagrams, sequence diagrams, and activity diagrams. These charts will help you plan your system's scope, dynamic performance, and how it behaves. Regardless of the implementation details, you want to get only the performance of the system that you need to perform.
use case diagram (Diagram)
UML use case diagrams provide a way to model a system environment. It helps you determine the external and internal elements of the system/application as well as the system scope. As a graphical modeling model, it will also be helpful when you need to talk to the system requirements that you collect, and it is important for the development team to work on the finished product. The owner of the enterprise, or the first contact with the SOFTWARE product users also have a great help. A use case diagram can visually express how the system satisfies the collected business rules and specific user needs.
UML use case diagrams can also be used later in the project. You can assist in testing the related functionality of a project through the requirements defined in the use case diagram. Not only can you verify that system performance is error-free (no crashes or obvious illogical responses), but you can also verify that the system runtime executes the specified command as required. This allows you to test whether the system fully meets the requirements to make sure that the finished product is ready for production-that is, it fully meets the needs of the user.
Only by ensuring that reasonable and practical requirements are met can the greater success of IT projects be ensured.
sequence Diagram (the Sequence Diagram)
You can use UML sequence diagrams to refine requirements and link design elements. Sequence diagrams allow for interactive documentation between high-level and low-level objects. The interaction is displayed between the role (the same as the role in the use case diagram) and the class instance (the technical object and detail object that runs in the computer's memory).
With sequence diagrams, you can describe system behavior over time in a precise order of events (messages) in a system-specific scenario. Use sequence diagrams for use case analysis and guided design: You can decide which type of system object will be responsible for the administrative tasks defined by the use case diagram, and decide which object will manage "session" or communication within and outside the system. Because messages have been extracted from a sequence diagram, you can describe some of the key actions (methods) required for classes and interfaces (the code elements that we are finally compiling and deploying).
activity diagram (The activities Diagram)
UML activity diagrams are designed to help you understand the dynamic changes of objects in your system. Used to describe how a particular class or group of classes works together. Unlike a sequence diagram, an activity diagram is not a series of time-related traffic, but a control transfer from one task to another, specifying who (which object) is responsible for the task that occurs.
UML activity diagrams are also technical views of business processes. You can analyze business workflows or work with business process modeling to get an activity diagram.
An activity diagram can also help construct a detailed dynamic view of elements within a system (how EJBS interoperate, and so on).
Drive design through analysis
The analysis model captures system intentions and expected behavior that are independent of implementation details, and is not related to the language used, the deployed application server, or the architecture used. However, after the design phase began, everything changed. You must go into the details of the production environment and build the software into a specific architecture. Design is the implementation of the system.
If the design is based on analysis, you can be more confident of the correctness of the system behavior that you are writing, and confirm that the results you develop will be a demand-built system. You will be highly successful-allowing users to get the systems they need. You can also reduce development time by directly leveraging the information that is analyzed without having to regenerate in the design process, thereby reducing human error because you do not have to "replicate" any work.
Through analysis, what can we get? Using a use case diagram, you can discover objects and facilitate the creation of classes and interfaces. One or more classes and interfaces can implement a role, and you can create classes and interfaces directly in the role definition. You can also link roles to existing classes and interfaces, showing how to use a single code to satisfy multiple elements that are parsed.
You can discover methods and facilitate the creation of class operations through sequence diagrams. If you need to send a message to a class, you can call the method of that class. Messages in a sequence diagram can be used to automatically create an action or link to an existing operation. You can use links to track the functionality of the method, including what is entered and what must be returned, and so on.
What the design contains
You already know what to build, and now you need to express how to build it. You need to determine where the business logic resides: It can be placed in components such as an EJB for an application server, or in a class or component that uses languages such as VB or PowerBuilder, as part of a client application, or as triggers and procedures that are placed in a relational database. You need to make choices based on requirements, including extensibility, security, performance, and accessibility.
UML class Diagrams and component diagrams are used to define detailed technical system static structures.
class Diagram (the Class Diagram)
UML class diagrams, business logic, and all supporting structures are used to define the entire code structure. Since class diagrams are used to simulate the actual code that is maintained in development, it is obvious that it is a general expression of an object language such as Java or PowerBuilder. You can also use UML class diagrams to generalize complex structures in XML to make them easier to develop and understand.
You can generate code from a UML class diagram. You can also edit the code during the development process to refine, test, and deploy the final running application. Because PowerDesigner has a 1:1 mapping function between the object language and UML class diagrams, you can also implement reverse engineering code, read the source file, and create a new class diagram. You can get a deeper understanding of your existing systems and simplify integration and maintenance work.
Component Diagram (the Component Diagram)
UML component diagrams will be used to describe the definition and relevance of advanced objects in the larger black box view. It is still a design model and is a direct generalization of the code. For example, the component identity of an EJB is directly linked to a series of classes and interfaces necessary for implementation and will generate the required code to drive the development of the final bean.
Component diagrams are easier to understand and manage than the code-tier view of a component architecture. You can also share and reuse code by writing the documentation for the component interface, and users need (or rarely) to understand the implementation details of the component to use the code in other projects and systems.
Right-click the customer entitybean_cmp and select Create/update class Diagram to generate the following class Diagram:
Cyclic iterative Engineering
The world is not static, and so is your IT project. When you understand the requirements, by analyzing the design and building some elements of the system, it is inevitable that new changes will be encountered, such as updating definitions, or some errors that need to be corrected in the existing use case diagram, the code is edited in the IDE and text editor, and the database is optimized by DBA. You must manage and master all the details that need to be changed to ensure that the system you build is aligned with your business needs.
One solution to the round-trip project is that the current code needs to be reflected in the class diagram when it is changed during development. Specific details are as follows:
1. Create class diagrams and add business logic elements to the model
2. Generate File System application code
3. Edit code in the IDE or text editor
4. Edit the design, ignoring the changes that occurred in the generated code
5. Reverse-engineer the editorial content until it is consistent with the existing class diagram
6. Synchronize the work completed in the design process with the content edited during development (merge)
7. Generate new code, which is the sum of design code and developer Change code
When you modify a class diagram to reflect new design content, you should use synchronous/merge techniques to prevent the loss of developer work, while allowing designers to accept or reject changes made during the development process. In this way, PowerDesigner enables it to fully control the architecture, which is the key to winning.
The PowerDesigner function is not limited to this. Now that the design model has been updated, you can link these changes to the analysis. It is possible that you have found new requirements in the analysis that can be reflected in the design and written in code. Using the leading Compare/merge technology in PowerDesigner (discussed in September Blueprint), you can get real round-trip synchronization in all models and phases of the development cycle.
Conclusions
All modern IT projects must be able to be implemented at a faster rate, with higher reliability and the ability to effectively promote enterprise development. By using the new UML technology for analysis and design in the OOAD section of your work, you can control the architecture and understand the software in depth.
PowerDesigner leverages the ability to compare/merge technologies, as well as integrated UML modeling techniques that enable you to react quickly to changes. Changes are quickly merged into any layer, including analysis, design, and runtime, wherever they occur. System models and systems are often mirrored and backed up to achieve accurate and predictable development results. These advantages will translate into faster development speed and rapid response to changes in business processes, market conditions and technological innovations. Give IT a unique ability to maintain the company's competitive edge.
