Solved

How Do I Pass a Value from a Scriplet Variable to an iReport Parameter?

Posted on 2010-11-12
8
2,363 Views
Last Modified: 2012-05-10
I wrote a scriptlet that executes an Oracle SQL function called "get_bps_rept_gn". It returns a number that I am trying to pass to an iReport 3.5.1 parameter. The parameter is called $P{bps_rept_gn}. Whenever I try to pass the value to this parameter, the parameter displays as null. I can successfully pass the value to a variable of the same name as the parameter ($V{bps_rept_gn}. This value displays in the report. I'm new to scriplets so I may be missing something in the syntax.
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com.BPS_scriptlet_pg;

import net.sf.jasperreports.engine.JRDefaultScriptlet;
import net.sf.jasperreports.engine.JRScriptletException;
/*import net.sf.jasperreports.engine.query.JRQueryExecuter;*/
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.CallableStatement;
import java.util.HashMap;
import java.util.Map;


/**
 *
 * @author 
 */
public class BPS022_scriptlet extends JRDefaultScriptlet {
    
    Connection con;



@Override
    public void afterReportInit() throws JRScriptletException
    {
        con = (Connection)this.getParameterValue("REPORT_CONNECTION");

        try{
        seeCon(con); 


Integer pi_rept_gn2 = 0;

CallableStatement cs4 = con.prepareCall("{? = call get_bps_rept_gn}");

cs4.registerOutParameter(1, java.sql.Types.NUMERIC);

cs4.executeUpdate();

pi_rept_gn2 = cs4.getInt(1);

this.setVariableValue("bps_rept_gn", pi_rept_gn2);

//parametersMap.put("bps_rept_gn", pi_rept_gn2.intValue());
Map parameters = new HashMap();
		parameters.put("bps_rept_gn", pi_rept_gn2);



        } catch (SQLException e){
            System.out.println("Caught SQL Exception: " + e.getErrorCode());
        }


        System.out.flush();
    }
  
    public void seeCon (Connection c) throws SQLException
    {
        System.out.println("Con is closed? :" + c.isClosed());
    }


}

Open in new window

0
Comment
Question by:shellybelly999
  • 4
  • 4
8 Comments
 
LVL 27

Expert Comment

by:mrcoffee365
ID: 34128157
I see where you put the new value into a new HashMap of parameters:
Map parameters = new HashMap();
            parameters.put("bps_rept_gn", pi_rept_gn2);

but I don't see where that is put somewhere that would be visible outside of this method.  And this method doesn't call the report, so it can't help you there.  You create the object in the method, then the method ends and the object goes away.

Where do you want the new parameter value to be used to be sent to iReport?
0
 

Author Comment

by:shellybelly999
ID: 34133725
I've linked the scriptlet to the report so that's why I'm not calling the report. There is a parameter defined in the report that's called $P{bps_rept_gn}. I was hoping that the new parameter value would replace the default value of the parameter. But maybe this is not possible. Maybe the parameter value can only be passed at the time that the report is called rather than after the report is already initialized?
0
 
LVL 27

Accepted Solution

by:
mrcoffee365 earned 500 total points
ID: 34136257
I don't know if you can change a value for the report with the this.setVariableValue call in this scriptlet -- I don't see where the variable is defined, or the report.

But I do know that creating the HashMap will have no effect outside this scriptlet.  So if you need the hashmap, you have to do it differently.
0
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

 

Author Comment

by:shellybelly999
ID: 34142050
I'm sorry. I didn't include the .jrxml report file with the code because that's a separate file. The scriptlet was being called from the .jrxml file. After investigating, I found that I need to call the report in a manner similar to this:

jasperReport = JasperCompileManager.compileReport(
          "reports/jasperreports_demo.jrxml");
      jasperPrint = JasperFillManager.fillReport(
          jasperReport, new HashMap(), new JREmptyDataSource());
      JasperExportManager.exportReportToPdfFile(
          jasperPrint, "reports/simple_report.pdf");

So your answer got me on the right track and I'm not trying to pass the parameter from the scriplet called by the report. Now I'm trying to create a little Java app that will call the report and pass the parameter to it. Thanks for your help and please wish me luck!
0
 

Author Closing Comment

by:shellybelly999
ID: 34142059
I didn't supply all the info that Mr. Coffee needed to give a complete solution. But I'm happy because he straightened out my incorrect approach to the problem.
0
 
LVL 27

Expert Comment

by:mrcoffee365
ID: 34142263
Thanks, and good luck!

Also -- it's great that you posted your final solution.  Was it the this.setVariableValue for the named variable that set the value the way you wanted?  As long as you had the call done correctly, as you've posted?
0
 

Author Comment

by:shellybelly999
ID: 34160098
I successfully passed the parameters in my test! In order to pass the parameter, I first created a parameter called $P{ReportTitle} in my iReport.

Then I created a Java program to run the report. Before the statement to fill the report, I created the statements below which change the value in the $P{ReportTitle} parameter to "Successfully Changed Title":

//Preparing parameters
Map parameters = new HashMap();
parameters.put("ReportTitle", "Successfully Changed Title");

Then I filled the report with this code:

JasperFillManager.fillReportToFile(reportDirectory + "\\" + reportName + ".jasper",
               parameters,connection);  // creates .jrprint file

Now back to my project!
0
 
LVL 27

Expert Comment

by:mrcoffee365
ID: 34161107
Great -- thanks for posting!
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
servlet doXXX methods 3 51
egit plugin on eclipse 8 65
script issue to add permissions to the registry hive 2 39
How to convert from xls to xlsx using java 7 42
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
The viewer will learn how to implement Singleton Design Pattern in Java.
In this fourth video of the Xpdf series, we discuss and demonstrate the PDFinfo utility, which retrieves the contents of a PDF's Info Dictionary, as well as some other information, including the page count. We show how to isolate the page count in a…

832 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question