create dynamic group with javabean datasource

[primoz]

Hi,

I need a report with javaBean datasource and generic groups.

I have created a new JavaBean Datasource and the data are displayed in the report. But I do not know how to use  dynamic groups with data from javabean. I have no problem with dynamic groups when the datasource is database.You can read more about dynamic group and database at http://jasperforge.org/plugins/espforum/view.php?group_id=102&forumid=103&topicid=54915&page=2.

I have done the following steps:

1.create a report with javabean datasource

2.add a new group with group expression $P{REPORT_SCRIPTLET}.evaluateField($P{P_GROUP_COLUMN1})

3.My data is not grouped 

Below is EvaluationScriptlet class. Does anyone know how to modify the report for this kind of usage?

Regards,

Primoz

import net.sf.jasperreports.engine.JRDefaultScriptlet;
import net.sf.jasperreports.engine.JRScriptletException;
import net.sf.jasperreports.engine.fill.JRFillField;

public class EvaluationScriptlet extends JRDefaultScriptlet {
 public Object evaluateField(String fieldName) throws JRScriptletException {
        System.out.println("evaluateField=" + fieldName);
  JRFillField field = (JRFillField)this.fieldsMap.get(fieldName);
        System.out.println("field=" + field);
  if (field == null) {
   throw new JRScriptletException("Field not found : " + fieldName);
  }

  StackTraceElement[] stack = new Exception().getStackTrace();
  if (stack.length < 2) {
   throw new JRScriptletException("Unable to obtain current call stack");
  }

  String evaluateMethod = stack[1].getMethodName();
  Object value;
  if (evaluateMethod.startsWith("evaluateOld")) {
   value = field.getOldValue();
            System.out.println("evaluateOld=" + value);
  }
  else if (evaluateMethod.startsWith("evaluate")) {
   value = field.getValue();
            System.out.println("evaluate=" + value);
  }
  else {
            value = field.getValue();
            System.out.println("EvaluationScriptlet=" + value);
   //throw new JRScriptletException("Unable to determine evaluation type from method name " + evaluateMethod + ".." + fieldName + ".." + field + ".." + field.getDescription() + ".." + field.getValue() + "..." + field.getOldValue());
  }
  return value;
 }

 public String priorityDescription() throws JRScriptletException {
     return "";
 }
}

 

 

 

 

[sousa1981]

To have grouping work, you will need to order at ascending or descending.