Rapid Application Development

Transcription

1 Rapid Application Development Chapter 5 : Developing RAD with CASE tool Dr. Orawit Thinnukool College of Arts, Media and Technology, Chiang Mai University

2 Contents - Introduction to CASE tools - What is CASE tools - Components of CASE Tools - Types of CASE tools - What CASE tools are used to? - How the Organization uses CASE tools - Advantages and Disadvantages of CASE Tools - Characteristics of a successful CASE Tool - RAD tools : App Gini - RAD tools :App Inventor

3 Introduction to CASE tools CASE originated in the 1970s when computer companies were beginning to borrow ideas from the hardware manufacturing process and apply them to software development. Some CASE tools supported the concepts of structured programming and similar organized development methods. CASE tools have had to encompass or accommodate visual programming tools and object-oriented programming. Some of the benefits of CASE and similar approaches are that, by making the customer part of the process

4 What is CASE tools Computer-aided software engineering (CASE) is the domain of software tools used to design and implement applications. CASE tools are set of software application programs, which are used to automate SDLC activities. CASE tools are used by software project managers, analysts and engineers to develop software system. CASE tools are similar to and were partly inspired by Computer Aided Design (CAD) tools used to design hardware products. CASE tools are used to develop software that is highquality, defect-free, and maintainable.

5 What is CASE tools CASE software is often associated with methodologies for the development of information systems together with automated tools that can be used in the software development process. Tools that provide automated assistance to simplify software development process: e.g. Design Development Testing

6 Type of CASE Tools

7 Type of CASE Tools

8 Components of CASE Tools

9 Types of CASE tools Classic CASE tools - established software development support tools (e.g. interactive debuggers, compilers, etc.) Real CASE tools - can be separated into three different categories, depending on where in the development process they are most involved in: **Upper - support analysis and design phases, are used in planning, analysis and design stages of SDLC. **Lower - support coding phase, are used in implementation, testing and maintenance. **Integrated - also known as I-CASE support analysis, design and coding phases, are helpful in all the stages of SDLC, from Requirement gathering to Testing and documentation. Note that :CASE tools can be grouped together if they have similar functionality, process activities and capability of getting integrated with other tools.

10 Upper and lower CASE tools

11 What CASE tools are used to?

12 How to uses CASE tools:

13 How the Organization uses CASE tools:

14 Role of CASE tools for Develop RAD

15 Advantages and Disadvantages of CASE Tools Advantages 1. Produce system with longer effective operational life. 2. Produce more flexible system in development process. 3. Produce system with excellent documentation. 4. Produce system that more closely meet user need and requirements. 5. Produce system that need less systems support. Disadvantages 1. Produce initial system is more expensive to build and maintain. 2. Require more extensive and accurate definition of user need and requirements. 3. Difficult to customize. 4. Difficult to use with existing system. 5. Require training of maintenance staff or user.

16 Characteristics of a successful CASE Tool A CASE tool must have the following characteristics in order to be used efficiently (Nipun Tomar,2011) : A standard methodology: A CASE tool must support a standard software development methodology and standard modeling techniques. In the present scenario most of the CASE tools are moving towards UML. Flexibility: Flexibility in use of editors and other tools. The CASE tool must offer flexibility and the choice for the user of editors' development environments. Strong Integration: The CASE tools should be integrated to support all the stages. This implies that if a change is made at any stage, for example, in the model, it should get reflected in the code documentation and all related design and other documents, thus providing a cohesive environment for software development.

17 Characteristics of a successful CASE Tool Integration with testing software: The CASE tools must provide interfaces for automatic testing tools that take care of regression and other kinds of testing software under the changing requirements. Support for reverse engineering: A CASE tools must be able to generate complex models from already generated code. On-line help: The CASE tools provide an online tutorial for access.

18 RAD tools : What is App Gini AppGini was released on 2002 helps user develop and responsive web database applications instantly. User do not need to have any programming background to use it. Just define the database, set some options, click the Generate button, and developer're done! Worked on developing it by adding features, enhancements and fixes. AppGini has become an outstanding data management product essential web developera and network administrators.

19 RAD tools : What is App Gini AppGini greatly saves time by taking care of the routine data management code. AppGini allows you to concentrate on your business logic, and to reduce project finish time. AppGini generates code that has been used by thousands of users for development RAD. App Gini has been refined the code, fixed reported bugs, and enhanced reliability. User don't need to spend days and weeks testing and debugging code. GUI of AppGin

20 RAD tools : What is App Gini AppGini PHP Generator For MySQL enables you to create PHP database applications that allow users to view, search and edit data in your MySQL database. The data can be displayed as text, link, HTML, check boxes or image, and you can customize the output style by editing the CSS and HTML templates. AppGini supports multiple user groups with different access permissions and you can also define fields to be read-only, regardless of access permissions. Other features include cross-table lookup fields, export to CSV, data filtering, detailed logging of all user actions, file uploads, image functions, and more. No PHP coding required.

21 RAD tools : What is App Gini App Gini GUI table App Gini can crate table of database for generating code PHP

22 RAD tools : What is App Gini Generating Code to.php

23 RAD tools : Performance of AppGini AppGini generates 1000s of lines of code, and also providing a rich set of data management features. If the projects hired a programmer to write the same code, it would cost you many man-days of development fees. AppGini saves you that cost, and you can use it over and over in your future projects AppGini generates secure code. You don't need to worry whether your code is vulnerable to SQL injection, XSS, brute force attacks,... etc.

24 RAD tools : Code and Application Structure This forms are pretty basic, but do the job, and there is even a print preview option. The quick search will try to match any field that contains the value you enter, and helpfully highlight the matches. Filters allow you to select one or more field, operators and values with AND and OR to link each strand. There are HTML templates for the grid rows and for the data entry form for tweaking layout. The code is fairly clean and well commented, though generally procedural and may also be a little cryptic for a beginner to hand code. PHP Data Types Variables can store data of different types, and different data types can do different things. PHP supports the following data types: String / Integer/ Float / Boolean / Array / Object / NULL

25 Introduction to App Inventor App Inventor is a free, open source application that permits people with any level of programming background to create software applications for the Android operating system. MIT App Inventor is the fastest way to build apps for Android phones and tablets. Even with no prior experience, you can learn to build apps within hours. Professor David Wolber, who has been teaching beginners programming with App Inventor since its inception in With step-by-step video screencasts, Wolber starts with the basics then leads you through the development of successively more complex apps, teaching you programming concepts as you go.

26 Introduction to App Inventor App Inventor for Android is an open-source web application originally provided by Google which popular in mobile device. It allows newcomers to computer programming to create software applications for the Android operating system (OS). It uses a graphical interface, which allows users to drag-and-drop visual objects to create an application that can run on Android devices.

27 Five Benefits of Using App Inventor by Joseph, & JosephV No knowledge of programming languages is required. You create the design by dragging stuff onto the screen and arranging them however you want. The logic of the app is determined by connecting puzzle pieces together. The service doesn t always allow you to connect the pieces which helps prevent a lot of errors. No coding needed Works very fast Because it runs in your browser and it only requires a lightweight install on your PC it works fast without having to wait for a bulky program to startup. There is an app you can download to your phone that allows you to connect to the site via Wi-Fi or USB. This app allows you to see the changes made to your app on the fly while you create it.

28 Five Benefits of Using App Inventor Automated app creation After the app is working correctly, and you applied the spit and polish the site handles the building, signing, and packaging of your app to give to friends, or distribute in the Google Play marketplace. More Code to develop A common drawback to codeless development is that it is limited in what it s capable of, but since this was originally created by Google, they made it on par with what you would be able to leverage if you wrote actual Java. This includes GPS, SMS, and databases. by Joseph, & JosephV Easy and fun way to learn App inventor is an easy and fun way to learn how apps work, and with the active community you will never be alone in your journey. App inventor uses a lot of common practices that you will encounter on a daily basis while coding so it is a good tool to educate everyone.

29 Introduction to App Inventor GUI of development environments in App Inventor In creating App Inventor, Google drew upon significant prior research in educational computing, as well as work done within Google on online development environments. The blocks editor in the original version ran in a separate Java process, using the Open Blocks Java library for creating visual blocks programming languages.

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