[jboss-user] [jBPM] - Cannot instantiate abstract class or interface

dearest555 [http://community.jboss.org/people/dearest555] created the discussion "Cannot instantiate abstract class or interface" To view the discussion, visit: http://community.jboss.org/message/640479#640479 --------------------------------------------------------------   Hi, I 'm newbie in JBPM. I try to do assign handler but I got an error message. Caused by: org.hibernate.InstantiationException   Cannot instantiate abstract class or interface: com.mmm.workflow.bom.Document -file : process.jpdl.xml package com.dear.workflow.task.assigment; import org.apache.commons.lang.StringUtils; import org.jbpm.api.model.OpenExecution; import org.jbpm.api.task.Assignable; import com.dear.common.bom.Employee; import com.dear.workflow.bom.Document; import com.trg.search.Search; public class AssignByOrganization extends AssignmentBase {   public static String ORGANIZATION_TYPE_SUPERVISOR = "supervisor";   public static String ORGANIZATION_TYPE_DIVMGR = "divmgr";   public static String ORGANIZATION_TYPE_DEPTMGR = "deptmgr";   String type; /* (non-Javadoc)   * @see org.jbpm.api.task.AssignmentHandler#assign(org.jbpm.api.task.Assignable, org.jbpm.api.model.OpenExecution)   */ public void assign(Assignable assignable, OpenExecution execution)    throws Exception {   String docRefId = (String)execution.getVariable("docRefId");   Search search = new Search(Document.class);   search.addFilterEqual("docRefId", docRefId);   Document document = (Document)generalDAO.searchUnique(search);   //Document document = (Document)execution.getVariable("document");   Employee author = generalDAO.find(Employee.class, StringUtils.rightPad(document.getAuthor().getEmployeeId(), 10, " ").toUpperCase() ).getSupervisor();   //generalDAO.refresh(author);   if(author != null)   {    if(type.equals(ORGANIZATION_TYPE_SUPERVISOR))     assignable.setAssignee(author.getSupervisor().getEmployeeId());    if(type.equals(ORGANIZATION_TYPE_DIVMGR))     assignable.setAssignee(author.getDivisionManager().getEmployeeId());    if(type.equals(ORGANIZATION_TYPE_DEPTMGR))     assignable.setAssignee(author.getDepartmentManager().getEmployeeId());     } } }  # < task g=++"186,155,123,52"++ name=++"Supervisor Review"++> <assignment-handler auto-wire=++"true"++ class=++"com.dear.workflow.task.assigment.AssignByOrganization"++> <field name=++"type"++> <string value=++"supervisor"++/> </field> </assignment-handler> <notification/> <!--<reminder duedate="2 minutes" repeat="10 seconds"/> --> <transition g=++"464,134:-36,-18"++ name=++"deny"++ to=++"notify deny"++/> <transition g=++"5,-16"++ name=++"approve"++ to=++"Finance Review"++/> </task> - -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/640479#640479] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]