In this article we’ll be discussing Jasper Report examples and how to write a Java script that generates reports. A simple example of this is shown below. This script is simply a script that generates a Java report, by using the “aws” sub-expression language. Each part can define a label, a time frame, expression, or more generic property names. The following piece of jaspersript, j Jasper-Report-example, creates a report from a CSV file.
This file contains a list of ten keyword phrases that were used in the original ctree product. We’re going to use these keywords in our example to create a simple and quick report. First of all we have to define our own list of keyword phrases. These include some common ones like “addition”, “modify”, “size” and so on.
Next we have to define some generic functions to build our vocabulary. These are expressions that can be compared against other expressions in the vocabulary list to generate reports. These expressions can be anything like: equals, is less than, is greater than, is equal to, and so on.
Some functions that are commonly implemented are the following: create, drop, duplicate, flatten, compress, resize, and so on. We’ll also need to define a couple of custom functions that will help us run these Jasper Reports. These custom functions can be anything you want to automate. For example, we can use them to create and store custom reports or to implement complex functions.
One function that we will implement is the Partial Value Extractor. The Partial Value Extractor takes a partial value from the eRport and creates a sparse matrix out of it. This will then be used for differentiating between two different data sources. The first thing you will do is download the Jasper Report example from the Jasper Report website and open it in your default editor like Notepad or Wordpad.
Next we will modify the “row” array to use jaspersoft studio’s “row_group” formula from the Jasper Report examples and paste the extracted data into the “row” input. After doing so, close Notepad or whatever other text editor we were using. Save the file and close the editor to save the file. Use the “Open” menu to open the newly saved file.
Another thing we have to implement is to add the “do not use if-else statements” when defining variable expressions in the example above. We are also going to need to add a custom function to add ternary operators in the “if” part. When we run the example, it will print the list of stocks from the eRport in the current date. Then when we select one stock from the list, it will display the full name of the company in the formatted string. We will also determine the maximum price allowed for that stock by clicking on the “max price” option and the list of stocks in the previous date will pop up.
The last thing that we have to implement is the use of the “for” loop to extract multiple results from the “row_group” expression. The last part of the script needs to be modified to handle the case where there are multiple options separated by commas. It simply loops through each of the expressions in the “row” array until it finds a match in the format of “nameof(x)”. If the expression doesn’t end with a comma, it will continue its search from the first to the last option in the array. In the example, the first option would be “firstname(x)” and the last would be “lastname(x)”.