| Uploader: | JoJojar |
| Date Added: | 2 April 2016 |
| File Size: | 36.50 Mb |
| Operating Systems: | Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X |
| Downloads: | 50473 |
| Price: | Free* [*Free Regsitration Required] |
The BIRT ODA extension point
The method returns true if there are remaining rows and false if there are no other rows to return. The composite that is created calls the DataSourceWizardPage. For the report document ODA, this method closes xl Data Extraction Task's result set iterator and sets all objects to null. The observer method that you must overwrite is the prepare method, which is responsible for preparing the IQuery method for execution.
This task allows an application to use ftp report document as a temporary cache that contains all the bindings, expressions, and aggregations. If you are using the wizard, the Connection object most of the boilerplate code is already written, but you complete the implementations of these methods.
You use the ova method to iterate over each odw in the result set. Sign in or register to add and subscribe to comments. The Driver class is the root observer for the ODA. The open method is one of oa methods observed that you must override. Subscribe me to comment notifications. The SWT designer goes a long way in easing the development of the layouts of views. By writing an ODA that can retrieve data from a report document file, you can write reports against existing reports, opening a whole new set of possibilities for the open source BIRT, such as run-once data sets that you can reuse for multiple reports.
It is responsible for opening the data connection to the data source.
That roughly describes all the objects that are used in the runtime plug-in. These plug-ins are fairly complex, but by referencing the example project, you can extend BIRT's data-retrieval capabilities.
It serves as a factory object that creates the Connection object. Comments Sign in or register to add and subscribe to comments. But what is different about the ODA architecture is that several of the observed calls are actually factory calls, requiring the observer to create new objects that are themselves observers.
However, the Connection object has a few methods oxa you to modify. View a larger version of Figure 8. The complete source for the plug-in is available in Download.
Artifacts using DTP ODA Designer UI Framework Plug In (8)
BIRT's internal data engine serves as the observed object, and the developer is responsible for creating the observer. If you don't create a design time UI plug-in, BIRT provides prompts for the properties that are defined in the plugin.
In the example code, the RptDocPropertyPage.
It calls a separately defined property page. The second method to overwrite is the factory ctp executeQuerywhich returns an IResultSet object. The remaining items to work with are the driverClass and the properties. The report document ODA, contains the name of the data set that is stored inside the report document, which is supplied by the design plug-in and stored in the report design for execution.
Several different extension points are defined in BIRT.
Download the source code For a complete example of a design time plug-in, see the example code available in Download. Likewise, the DataSetWizardPage is the first page that is used in data set creation.
The IQuery method follows this same pattern of being both an observer and a factory. If you followed all of the steps in the wizard, you already set most of the configuration items. Remember that editing a data source editor when you click a data source in the BIRT editor does not call this same set of classes: View image at full size.
The design time UI plug-in is not required, but it is helpful.
No comments:
Post a Comment