Welcome!

Open Source Cloud Authors: Liz McMillan, Yeshim Deniz, Elizabeth White, Pat Romanski, Zakia Bouachraoui

Related Topics: Open Source Cloud, Java IoT, Eclipse

Open Source Cloud: Article

How to Develop an Application Using the Eclipse BIRT Design Engine API

Creating a customized report design application

Changing the Data Set Binding of a Report Item
You can also use the report item's setDataSet( ) method to set or change the data set used by a report item. If you change the data set used by a report item, you must ensure that the contents of the report item access only data bindings that are supplied by the new data set. If necessary, you must change the references to data bindings in data elements, text elements, and scripting methods. If the data bindings in the old data set don't match the names or data types of the fields that the new data set provides, you must correct the data bindings before you generate a report from the modified report design. Use the ReportItemHandle method, columnBindingsIterator( ) to iterate over the column bindings that the report item uses. The items in the list are ComputedColumnHandle types. This class provides methods to access the name, expression, and data type of the column binding.

To access the data set column and expression that a data item uses, call the methods, getResultSetColumn( ) and getResultSetExpression( ). You can compare the data type and name with the result set columns that the data set returns.

How To Bind a Data Set to a Table
The code sample in Listing 8 shows you how to check for a particular data set in a report design then changes the data set for a table. The code finds the table and data set by name. Alternatively use slot handles to navigate the report design structure. The variable, design, is a ReportDesignHandle object.

Saving a Report Design Programmatically
After making changes to an existing report design or creating a new report design, you can choose to save the design for purposes of archiving or future use. To overwrite an existing report design to which the application has made changes, use the ReportDesignHandle save( ) method. To save a new report design or to keep the original report design after making changes, use the ReportDesignHandlesaveAs( ) method.

Alternatively, if you don't need to save the changes to the report design, use the ReportDesignHandleserialize( ) method. This method returns an output stream. The report engine can generate a report by opening a stream as an input stream.

If you don't need to make any further changes to the report design, use the ReportDesignHandleclose( ) method to close the report design.

How To Save a Report Design
The code below saves the open report design. The variable, design, is a ReportDesignHandle object:

design.saveAs( "sample.rptdesign" );
design.close( );

Creating a Report Design Programmatically
You can build a report design and generate the report output in an application without using BIRT Report Designer. You use the createDesign( ) method on the session handle class, SessionHandle, to create a report design. You use the other model classes to create its contents.

How To Create a New Report Design
The following code creates a report design:

SessionHandle session = DesignEngine.newSession( null );
ReportDesignHandle design = session.createDesign( );

ABOUT THE BOOK
This article is an excerpt from the book Integrating and Extending BIRT by Jason Weathersby, Don French, Tom Bondur, Jane Tatchell, and Iana Chatalbasheva and published by Addison-Wesley. The book is the second volume in a two-book series about business intelligence and reporting technology. The book introduces programmers to BIRT architecture and the reporting framework. It shows programmers how to build and deploy customized reports using scripting and BIRT APIs. It also describes how to use key extension points to create a customized report item, a rendering extension for generating output other than HTML or PDF, and an Open Data Access (ODA) driver for a new data source. (See Book)

More Stories By Jason Weathersby

Jason Weathersby is a member of the extended BIRT development team at Actuate Corporation and has backgrounds in both computer science and technical writing. He has many years experience in technical consulting, training, writing, and publishing about reporting, business intelligence tools, and database technologies.

More Stories By Tom Bondur

Tom Bondur is a member of the extended BIRT development team at Actuate Corporation and has backgrounds in both computer science and technical writing. He has many years experience in technical consulting, training, writing, and publishing about reporting, business intelligence tools, and database technologies.

More Stories By Jane Tatchell

Jane Tatchell is a content development manager in the Developer Communications group of Actuate Engineering.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


IoT & Smart Cities Stories
Intel is an American multinational corporation and technology company headquartered in Santa Clara, California, in the Silicon Valley. It is the world's second largest and second highest valued semiconductor chip maker based on revenue after being overtaken by Samsung, and is the inventor of the x86 series of microprocessors, the processors found in most personal computers (PCs). Intel supplies processors for computer system manufacturers such as Apple, Lenovo, HP, and Dell. Intel also manufactu...
Darktrace is the world's leading AI company for cyber security. Created by mathematicians from the University of Cambridge, Darktrace's Enterprise Immune System is the first non-consumer application of machine learning to work at scale, across all network types, from physical, virtualized, and cloud, through to IoT and industrial control systems. Installed as a self-configuring cyber defense platform, Darktrace continuously learns what is ‘normal' for all devices and users, updating its understa...
At CloudEXPO Silicon Valley, June 24-26, 2019, Digital Transformation (DX) is a major focus with expanded DevOpsSUMMIT and FinTechEXPO programs within the DXWorldEXPO agenda. Successful transformation requires a laser focus on being data-driven and on using all the tools available that enable transformation if they plan to survive over the long term. A total of 88% of Fortune 500 companies from a generation ago are now out of business. Only 12% still survive. Similar percentages are found throug...
OpsRamp is an enterprise IT operation platform provided by US-based OpsRamp, Inc. It provides SaaS services through support for increasingly complex cloud and hybrid computing environments from system operation to service management. The OpsRamp platform is a SaaS-based, multi-tenant solution that enables enterprise IT organizations and cloud service providers like JBS the flexibility and control they need to manage and monitor today's hybrid, multi-cloud infrastructure, applications, and wor...
Apptio fuels digital business transformation. Technology leaders use Apptio's machine learning to analyze and plan their technology spend so they can invest in products that increase the speed of business and deliver innovation. With Apptio, they translate raw costs, utilization, and billing data into business-centric views that help their organization optimize spending, plan strategically, and drive digital strategy that funds growth of the business. Technology leaders can gather instant recomm...
The Master of Science in Artificial Intelligence (MSAI) provides a comprehensive framework of theory and practice in the emerging field of AI. The program delivers the foundational knowledge needed to explore both key contextual areas and complex technical applications of AI systems. Curriculum incorporates elements of data science, robotics, and machine learning-enabling you to pursue a holistic and interdisciplinary course of study while preparing for a position in AI research, operations, ...
After years of investments and acquisitions, CloudBlue was created with the goal of building the world's only hyperscale digital platform with an increasingly infinite ecosystem and proven go-to-market services. The result? An unmatched platform that helps customers streamline cloud operations, save time and money, and revolutionize their businesses overnight. Today, the platform operates in more than 45 countries and powers more than 200 of the world's largest cloud marketplaces, managing mo...
Trend Micro Incorporated, a global leader in cybersecurity solutions, helps to make the world safe for exchanging digital information. Our innovative solutions for consumers, businesses, and governments provide layered security for data centers, cloud workloads, networks, and endpoints. All our products work together to seamlessly share threat intelligence and provide a connected threat defense with centralized visibility and investigation, enabling better, faster protection. With more than 6,00...
Tapping into blockchain revolution early enough translates into a substantial business competitiveness advantage. Codete comprehensively develops custom, blockchain-based business solutions, founded on the most advanced cryptographic innovations, and striking a balance point between complexity of the technologies used in quickly-changing stack building, business impact, and cost-effectiveness. Codete researches and provides business consultancy in the field of single most thrilling innovative te...
Codete accelerates their clients growth through technological expertise and experience. Codite team works with organizations to meet the challenges that digitalization presents. Their clients include digital start-ups as well as established enterprises in the IT industry. To stay competitive in a highly innovative IT industry, strong R&D departments and bold spin-off initiatives is a must. Codete Data Science and Software Architects teams help corporate clients to stay up to date with the mod...