How to Pass a Variable Parameter List to JasperReports' SQL 'IN' Predicate?

Passing a Variable Parameter List in JasperReports using SQL "IN" Predicate

When working with JasperReports and the SQL "IN" predicate, it is necessary to pass a parameter list to the query dynamically. This article demonstrates how to set the value of a parameter containing a list of integer values in a Java program.

The SQL query below requires a parameter list "roles" containing one or more integer values:

SELECT customer_name AS NAME, 
       id_customer   AS ID 
  FROM customer 
 WHERE customer_role IN ($P{roles})

To dynamically set the value of the "roles" parameter in Java, use the "$X" variable provided by JasperReports:

// Assume the "roles" parameter is a list of integers
List<integer> roles = ...;

// Convert the list to a comma-separated string
String roleString = roles.stream().map(String::valueOf).collect(Collectors.joining(","));

// Set the parameter value using the "$X" variable
parameters.put("roles", "$X{IN,customer-role," + roleString + "}");</integer>

Using the "$X{IN,column-name,parameter-name}" syntax allows you to specify the column to compare, the parameter name, and the list of values.

For example, the following query would use the "roles" parameter to filter a column called "customer_role":

SELECT * 
  FROM customer 
 WHERE $X{IN,customer_role,roles}

This solution allows you to pass a dynamic parameter list to the SQL "IN" predicate in JasperReports, ensuring that the query filters the data correctly based on the provided values.

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