The task payload can contain multiple payload message attributes. Since the payload is not well defined until the task definition, the Java object model for the task does not contain strong type objects for the client payload. The task payload is represented by the AnyType Java object. The AnyType Java object is created with an XML element whose root is payload in the namespace

http://xmlns.oracle.com/bpel/workflow/task

The payload XML element contains all the other XML elements in it. Each XML element defines a message attribute.

The code sample below shows how to set a task payload:

import oracle.bpel.services.workflow.task.model.AnyType;
import oracle.bpel.services.workflow.task.model.ObjectFactory;
import oracle.bpel.services.workflow.task.model.Task;
..........

Document document = //createXMLDocument
Element payloadElem = document.createElementNS("http://xmlns.oracle.com/bpel/workflow/
  task", "payload");
Element orderElem = document.createElementNS("http://xmlns.oracle.com/pcbpel/test/order", "order");
Element child = document.createElementNS("http://xmlns.oracle.com/pcbpel/test/order", "id");
  child.appendChild(document.createTextNode("1234567"));
  orderElem.appendChild(child); 
  payloadElem.appendChild(orderElem);
  document.appendChild(payloadElem);

  task.setPayloadAsElement(payloadElem);