Click here to close now.


Java IoT Authors: Victoria Livschitz, Pat Romanski, AppDynamics Blog, Elizabeth White, Liz McMillan

Related Topics: Eclipse, Java IoT, Open Source Cloud

Eclipse: Article

Developing an Eclipse BIRT Report Item Extension

Architecture and framework

The rotated label report item extension implements the following extension points:

  • registers the graphical user interface (GUI) to use for the report item extension
  • specifies how to represent and persist the report item extension in the Report Object Model (ROM)
  • specifies how to instantiate, process, and render the report item extension
To add an extension point element right-click on an extension point such as Choose New <extension point element> to add the extension element to the project. Figure 4 shows how to select the extension point element, report-ItemLabelUI, specified by the extension point,

An XML schema specifies the following properties that identify each extension point in the runtime environment:

  • ID - Optional identifier of the extension instance
  • Name - Optional name of the extension instance
  • Point - Fully qualified identifier of the extension point
On Extensions, these settings appear in Extension Details when an extension point is selected as shown in Figure 4.

The extension point,, specifies the following extension elements:

  • reportItemLabelUI - The fully qualified name of the Java class that gets the display text for the report item component in the BIRT Report Designer
  • model - ROM report item extension name that maps to this UI component
  • palette - Icon to show and the category in which the icon appears in the Palette
  • editor - Flags indicating whether the editor shows in the MasterPage and Designer UI and is resizable in the Editor
  • outline - Icon to show in the Outline View
  • propertyPage - Optional Property Edit Page to use for the report item extension in the Property Edit View

    The extension point specifies reportItem and the following extension element properties:

  • extensionName - Internal unique name of the report item extension
  • class - Fully qualified name of the Java class that implements the interface
  • defaultStyle - Predefined style to use for the report item extension
  • isNameRequired - Field indicating whether the report item instance name is required
  • displayNameID - Resource key for the display name

    reportItem also specifies the following property extension elements:

  • rotationAngle
  • displayText

    rotationAngle and displayText each specify the following properties:

  • name - Internal unique name of the property extension element
  • type - Data type, such as integer or string
  • displayNameID - Resource key for the display name
  • canInherit - Flag indicating whether the property extension element can inherit properties
  • detailType - Detail data type such as Boolean or string
  • defaultValue - Default value of the property extension element
  • isEncryptable - Flag indicating whether the property is encrypted
  • defaultDisplayName - Display name to use if no localized I18N display name exists

    The extension point specifies the following report Item extension elements:

  • name - Unique name of the report item extension.
  • class - Fully qualified name of the Java class that implements the interface.
  • supportedFormats - Supported rendering formats for this extended item. The value for this attribute is a comma-separated string, such as "HTML, PDF." The string is case-insensitive.
Listing 1 shows the automatically generated manifest file plugin.xml for the rotated label report item extension that describes the plug-in's activation framework to the run-time environment.

After defining the plug-in framework in the Eclipse PDE, the developer makes the code-based extensions required to complete the plug-in development process.

The rotated label report item extension implements the following interfaces and classes:

  • specifies the following interfaces:
    - IPropertyTabUI - Represents a new tab in the Property Editor view, creating the UI, updating property values on request, and notifying the BIRT framework of any UI-based property change. PropertyTabUIAdapter is the adapter class that implements this interface.
    - IReportItemLabelProvider - Defines the interface for the accessor method that provides the label text. ReportItemLabelProvider is the adapter class that implements this interface.
    - IReportItemPropertyEditUI - Provides the interface for defining tabs in the Property Editor.
  • provides accessor methods for processing general property information.
    - IRowSet - Defines the interface to a row set. Provides metadata, grouping level, and row navigation methods.
    - IReportItemPresentation - Defines the interface for presentation of a report item extension. IReportItem-Presentation sets the locale, resolution, output, and image formats and processes the extended item in the report presentation environment. ReportItemPresentationBase is the adapter class that implements this interface.
    - DesignElementHandle - Functions as the base class for all report elements. DesignElementHandle provides a high-level interface to the BIRT report model. The class provides the generic services for all elements. Derived classes provide specialized methods for each element type. DesignElementHandle implements the interface,
    - DesignEngine - Provides an interface to the BIRT design engine. DesignEngine instantiates a session handle to use when creating a new design, opening an existing design, and managing design processing. The session handle contains the report design's state. DesignEngine implements the interface, IDesignEngine interface.
    - ExtendedItemHandle - Provides a handle to an extended item that appears in a section of a report. The extended report item can have properties such as size, position, style, visibility rules, or a binding to a data source. ExtendedItemHandle extends ReportItemHandle, an abstract base class that extends DesignElement-Handle.
  • extends, the base class for report elements with a style, and implements, the interface for storing style element constants.
  • specifies the following interfaces:
    - IMessages - Defines the interface for getting a localized message from a message file using a resource key.
    - IPropertyDefinition - Defines the interface for the accessor methods that describe a property. PropertyDefinition is the adapter class that implements this interface.
    - IReportItem - Defines the interface for an instance of an extended report element. There is a one-to-one correspondence between the BIRT report item and this implementation. ReportItem is the adapter class that implements this interface.
    - IReportItemFactory - Defines the interface for the factory that creates an instance of the extended element, IReportItem. IReportItem stores the model data and serializes the model state. ReportItemFactory is the adapter class that implements this interface.
  • functions as the base class for the metadata of a property type. A property type provides the display name, data validation and conversion methods, XML name, and other processing. PropertyType implements the interface,
  • org.eclipse.core.runtime.Plugin defines the basic methods for starting, managing, and stopping the plug-in instance.

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 Iana Chatalbasheva

Iana Chatalbasheva is a member of the extended BIRT development team at Actuate Corporation and has backgrounds in both computer science and technical writing. She 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.

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.

@ThingsExpo Stories
SYS-CON Events announced today that IBM Cloud Data Services has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IBM Cloud Data Services offers a portfolio of integrated, best-of-breed cloud data services for developers focused on mobile computing and analytics use cases.
Today’s connected world is moving from devices towards things, what this means is that by using increasingly low cost sensors embedded in devices we can create many new use cases. These span across use cases in cities, vehicles, home, offices, factories, retail environments, worksites, health, logistics, and health. These use cases rely on ubiquitous connectivity and generate massive amounts of data at scale. These technologies enable new business opportunities, ways to optimize and automate, along with new ways to engage with users.
The buzz continues for cloud, data analytics and the Internet of Things (IoT) and their collective impact across all industries. But a new conversation is emerging - how do companies use industry disruption and technology enablers to lead in markets undergoing change, uncertainty and ambiguity? Organizations of all sizes need to evolve and transform, often under massive pressure, as industry lines blur and merge and traditional business models are assaulted and turned upside down. In this new data-driven world, marketplaces reign supreme while interoperability, APIs and applications deliver un...
The Internet of Things (IoT) is growing rapidly by extending current technologies, products and networks. By 2020, Cisco estimates there will be 50 billion connected devices. Gartner has forecast revenues of over $300 billion, just to IoT suppliers. Now is the time to figure out how you’ll make money – not just create innovative products. With hundreds of new products and companies jumping into the IoT fray every month, there’s no shortage of innovation. Despite this, McKinsey/VisionMobile data shows "less than 10 percent of IoT developers are making enough to support a reasonably sized team....
Too often with compelling new technologies market participants become overly enamored with that attractiveness of the technology and neglect underlying business drivers. This tendency, what some call the “newest shiny object syndrome,” is understandable given that virtually all of us are heavily engaged in technology. But it is also mistaken. Without concrete business cases driving its deployment, IoT, like many other technologies before it, will fade into obscurity.
Today air travel is a minefield of delays, hassles and customer disappointment. Airlines struggle to revitalize the experience. GE and M2Mi will demonstrate practical examples of how IoT solutions are helping airlines bring back personalization, reduce trip time and improve reliability. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Dr. Sarah Cooper, M2Mi's VP Business Development and Engineering, will explore the IoT cloud-based platform technologies driving this change including privacy controls, data transparency and integration of real time context w...
SYS-CON Events announced today that Sandy Carter, IBM General Manager Cloud Ecosystem and Developers, and a Social Business Evangelist, will keynote at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA.
The IoT market is on track to hit $7.1 trillion in 2020. The reality is that only a handful of companies are ready for this massive demand. There are a lot of barriers, paint points, traps, and hidden roadblocks. How can we deal with these issues and challenges? The paradigm has changed. Old-style ad-hoc trial-and-error ways will certainly lead you to the dead end. What is mandatory is an overarching and adaptive approach to effectively handle the rapid changes and exponential growth.
There will be 20 billion IoT devices connected to the Internet soon. What if we could control these devices with our voice, mind, or gestures? What if we could teach these devices how to talk to each other? What if these devices could learn how to interact with us (and each other) to make our lives better? What if Jarvis was real? How can I gain these super powers? In his session at 17th Cloud Expo, Chris Matthieu, co-founder and CTO of Octoblu, will show you!
Developing software for the Internet of Things (IoT) comes with its own set of challenges. Security, privacy, and unified standards are a few key issues. In addition, each IoT product is comprised of at least three separate application components: the software embedded in the device, the backend big-data service, and the mobile application for the end user's controls. Each component is developed by a different team, using different technologies and practices, and deployed to a different stack/target - this makes the integration of these separate pipelines and the coordination of software upd...
Mobile messaging has been a popular communication channel for more than 20 years. Finnish engineer Matti Makkonen invented the idea for SMS (Short Message Service) in 1984, making his vision a reality on December 3, 1992 by sending the first message ("Happy Christmas") from a PC to a cell phone. Since then, the technology has evolved immensely, from both a technology standpoint, and in our everyday uses for it. Originally used for person-to-person (P2P) communication, i.e., Sally sends a text message to Betty – mobile messaging now offers tremendous value to businesses for customer and empl...
"Matrix is an ambitious open standard and implementation that's set up to break down the fragmentation problems that exist in IP messaging and VoIP communication," explained John Woolf, Technical Evangelist at Matrix, in this interview at @ThingsExpo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
WebRTC converts the entire network into a ubiquitous communications cloud thereby connecting anytime, anywhere through any point. In his session at WebRTC Summit,, Mark Castleman, EIR at Bell Labs and Head of Future X Labs, will discuss how the transformational nature of communications is achieved through the democratizing force of WebRTC. WebRTC is doing for voice what HTML did for web content.
The IoT is upon us, but today’s databases, built on 30-year-old math, require multiple platforms to create a single solution. Data demands of the IoT require Big Data systems that can handle ingest, transactions and analytics concurrently adapting to varied situations as they occur, with speed at scale. In his session at @ThingsExpo, Chad Jones, chief strategy officer at Deep Information Sciences, will look differently at IoT data so enterprises can fully leverage their IoT potential. He’ll share tips on how to speed up business initiatives, harness Big Data and remain one step ahead by apply...
Nowadays, a large number of sensors and devices are connected to the network. Leading-edge IoT technologies integrate various types of sensor data to create a new value for several business decision scenarios. The transparent cloud is a model of a new IoT emergence service platform. Many service providers store and access various types of sensor data in order to create and find out new business values by integrating such data.
The broad selection of hardware, the rapid evolution of operating systems and the time-to-market for mobile apps has been so rapid that new challenges for developers and engineers arise every day. Security, testing, hosting, and other metrics have to be considered through the process. In his session at Big Data Expo, Walter Maguire, Chief Field Technologist, HP Big Data Group, at Hewlett-Packard, will discuss the challenges faced by developers and a composite Big Data applications builder, focusing on how to help solve the problems that developers are continuously battling.
WebRTC services have already permeated corporate communications in the form of videoconferencing solutions. However, WebRTC has the potential of going beyond and catalyzing a new class of services providing more than calls with capabilities such as mass-scale real-time media broadcasting, enriched and augmented video, person-to-machine and machine-to-machine communications. In his session at @ThingsExpo, Luis Lopez, CEO of Kurento, will introduce the technologies required for implementing these ideas and some early experiments performed in the Kurento open source software community in areas ...
There are so many tools and techniques for data analytics that even for a data scientist the choices, possible systems, and even the types of data can be daunting. In his session at @ThingsExpo, Chris Harrold, Global CTO for Big Data Solutions for EMC Corporation, will show how to perform a simple, but meaningful analysis of social sentiment data using freely available tools that take only minutes to download and install. Participants will get the download information, scripts, and complete end-to-end walkthrough of the analysis from start to finish. Participants will also be given the pract...
Internet of Things (IoT) will be a hybrid ecosystem of diverse devices and sensors collaborating with operational and enterprise systems to create the next big application. In their session at @ThingsExpo, Bramh Gupta, founder and CEO of, and Fred Yatzeck, principal architect leading product development at, discussed how choosing the right middleware and integration strategy from the get-go will enable IoT solution developers to adapt and grow with the industry, while at the same time reduce Time to Market (TTM) by using plug and play capabilities offered by a robust IoT ...
“In the past year we've seen a lot of stabilization of WebRTC. You can now use it in production with a far greater degree of certainty. A lot of the real developments in the past year have been in things like the data channel, which will enable a whole new type of application," explained Peter Dunkley, Technical Director at Acision, in this interview at @ThingsExpo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.