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Pentaho 8 Reporting for Java Developers

Pentaho 8 Reporting for Java Developers

By : Jasmine Kaur, Corti
4 (2)
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Pentaho 8 Reporting for Java Developers

Pentaho 8 Reporting for Java Developers

4 (2)
By: Jasmine Kaur, Corti

Overview of this book

This hands-on tutorial, filled with exercises and examples, introduces the reader to a variety of concepts within Pentaho Reporting. With screenshots that show you how reports look at design time as well as how they should look when rendered as PDF, Excel, HTML, Text, Rich-Text-File, XML, and CSV, this book also contains complete example source code that you can copy and paste into your environment to get up-and-running quickly. Updated to cover the features of Pentaho 8, this book will teach you everything you need to know to build fast, efficient reports using Pentaho. If your interest lies in the technical details of creating reports and you want to see how to solve common reporting problems with a minimum of fuss, this is the book for you.
Table of Contents (18 chapters)
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Functions and expressions


Pentaho Reporting provides many functions and expressions that may be used during report creation. A function in Pentaho Reporting is used to calculate a computed value, while an expression in Pentaho Reporting is a function whose scope is limited to the current dataset row. A function may maintain state, having access to many rows of data.

Functions and expressions in Report Designer

Starting from the Report Designer user interface, functions and expressions live in two different places because their scope is different. Functions can be found in report explorer, in particular, in the Data tab under the Functions group. The following screenshot shows how the report explorer looks with two functions defined:

Expressions, being related to the dataset, live in a different place: in the element properties panel. In particular, expressions live on each property of the panel, in the fourth column of the table showing an icon. There are two possible icons: the green plus...

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