Start process instance with a List of custom objects parameters

[rafael.pino]

Greetings.

I'm trying to start a process instance passing a List of custom objects using a parameter Map. The process instance is started but when I open the Form that uses the List of objects, then the server throws the following exception:

2018-03-15 16:20:33,587 INFO  [stdout] (default task-18) Error showing CreateDynamicObject input javax.servlet.jsp.JspException: java.lang.ClassCastException: java.util.ArrayList cannot be cast to [Ljava.lang.Object;

2018-03-15 16:20:33,601 ERROR [stderr] (default task-18) javax.servlet.jsp.JspException: java.lang.ClassCastException: java.util.ArrayList cannot be cast to [Ljava.lang.Object;

I have attached the .jar file containing the project artifacts.

Here is the code that I'm using to start the process:

import java.net.MalformedURLException;

import java.net.URL;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.junit.Test;

import org.kie.api.runtime.KieSession;

import org.kie.api.runtime.manager.RuntimeEngine;

import org.kie.api.runtime.process.ProcessInstance;

import org.kie.remote.client.api.RemoteRuntimeEngineFactory;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.hardnetics.loader.process.DocumentBO;

import com.hardnetics.loader.process.DocumentValidationRequirementBO;

public class TestRestAPI {

  private void startProcessAndHandleTaskViaRestRemoteJavaAPI(URL instanceUrl, String deploymentId, String user,

  String password) {

  // Setup the factory class with the necessarry information to communicate with

  // the REST services

  RuntimeEngine engine = RemoteRuntimeEngineFactory

  .newRestBuilder()

  .addUrl(instanceUrl)

  .addDeploymentId(deploymentId)

  .addUserName(user)

  .addPassword(password)

  .addExtraJaxbClasses(DocumentBO.class, DocumentValidationRequirementBO.class)

  .build();

  // Create KieSession and TaskService instances and use them

  KieSession ksession = engine.getKieSession();

  // sends a request for the operation to the server side and waits for the

  // response

  // If something goes wrong on the server side, the client will throw an

  // exception.

  try {

  Map<String, Object> params = new HashMap<String, Object>();

  DocumentValidationRequirementBO documents = new DocumentValidationRequirementBO();

  documents.setIdPersona(Long.valueOf(1090366577));

  DocumentBO document = new DocumentBO();

  List<DocumentBO> docs = new ArrayList<>();

  ObjectMapper oMapper = new ObjectMapper();

  document.setEcmId("123456789");

  document.setEcmPath("/var/log/document.pdf");

  document.setIsValid(false);

  docs.add(document);

  documents.setDocuments(docs);

          params.put("input", oMapper.convertValue(documents, Map.class));

  ProcessInstance processInstance = ksession.startProcess("LoaderProcess.ValidateDocumentBP",params);

  } catch (Exception e) {

  e.printStackTrace();

  }

  }

  @Test

  public void test() {

  String deploymentId = "com.hardnetics.loader:process:1.0";

  String user = "admin";

  String password = "admin";

  URL host;

  try {

  host = new URL("http://localhost:8080/jbpm-console");

  startProcessAndHandleTaskViaRestRemoteJavaAPI(host, deploymentId, user, password);

  } catch (MalformedURLException e) {

  // TODO Auto-generated catch block

  e.printStackTrace();

  }

  }

}

Please, anyone can tell me what I'm doing wrong?. How can I pass a List of custom objects as parameter and open it successfully using a Form?.

Thank you.