[jboss-user] [JBoss Seam] - Re: Binding Dropdown To Database Table Using Seam..
johnurban
do-not-reply at jboss.com
Tue Oct 17 16:58:58 EDT 2006
My Code give the "does not reference an Object of type SelectItem, SelectItem[], Collection or Map but of type : null" error message:
JSF:
| <h:selectOneMenu value="#{roomFinder.example.name}"
| converter="#{roomFinder.roomConverter}">
| <f:selectItems value="#{roomListByOrganization}"/>
| </h:selectOneMenu>
|
EJB backer for roomListByOrganization
| ...
|
| private Room example = new Room();
|
| public Room getExample() {
| return example;
| }
| @SelectItems(valueStrategy=SelectItems.Strategy.OBJECT, labelMethod="getname")
| private List<Room> roomListByOrganization;
| ...
|
| @Factory("roomListByOrganization")
| public List getRoomListByOrganization() { // f:selectItems value
| Map<String, Object> parameters = new HashMap<String, Object>();
| StringBuffer queryString = new StringBuffer();
| Users loggedInUser = login.getInstance();
|
| queryString.append(" and room.organizationId = :organizationId");
| parameters.put("organizationId", loggedInUser.getOrganizationId());
|
| if (queryString.length() == 0) {
| queryString.append("select room from Room room");
| } else {
| queryString.delete(0, 4).insert(0,
| "select room from Room room where");
| }
|
| if (order != null) {
| queryString.append(" order by room.").append(order);
| if (descending)
| queryString.append(" desc");
| }
|
| Query query = entityManager.createQuery(queryString.toString());
| for (Entry<String, Object> param : parameters.entrySet()) {
| query.setParameter(param.getKey(), param.getValue());
| }
| roomListByOrganization = (List<Room>) query.setMaxResults(pageSize).setFirstResult(
| pageSize * pageNumber).getResultList();
| return roomListByOrganization;
| }
|
RoomConverter.java
| package testSeam;
|
| import java.io.Serializable;
| import java.util.List;
|
| import javax.faces.component.UIComponent;
| import javax.faces.context.FacesContext;
| import javax.faces.convert.Converter;
| import javax.faces.convert.ConverterException;
|
| public class RoomConverter implements Converter, Serializable {
|
| private static final long serialVersionUID = 3820066884549543875L;
|
| List<Room> roomList;
|
| public RoomConverter(
| List<Room> roomList){
| this.roomList = roomList;
| }
|
| public String getAsString(FacesContext facesContext,
| UIComponent component,
| Object obj) {
|
| if (obj == null) return null;
|
| Room room = (Room) obj;
| String val = String.valueOf(room.getName());
| return val;
| }
|
| public Object getAsObject(FacesContext facesContext,
| UIComponent component,
| String str) throws ConverterException {
|
| if (str == null || str.length()==0) {
| return null;
| }
|
| long id = Long.valueOf(str).longValue();
| for (Room room : roomList){
| if (room.getId() == id) {
| return room;
| }
| }
| return null;
| }
| }
|
|
| 15:49:08,373 INFO [STDOUT] Hibernate: select room0_.ID as ID256_, room0_.Name as Name256_, room0_.OrganizationID as Organiza3_256_, room0_.Capacity as Capacity256_ from checkin.room room0_ where room0_.OrganizationID=? limit ?
| 15:49:08,381 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
| java.lang.IllegalArgumentException: Value binding '#{roomListByOrganization}'of UISelectItems with component-path {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /uQuickPersonAdd.jsp][Class: javax.faces.component.html.HtmlForm,Id: _id2][Class: javax.faces.component.html.HtmlSelectOneMenu,Id: _id7][Class: javax.faces.component.UISelectItems,Id: _id8]} does not reference an Object of type SelectItem, SelectItem[], Collection or Map but of type : null
| at org.apache.myfaces.util.SelectItemsIterator.hasNext(SelectItemsIterator.java:142)
| at org.apache.myfaces.renderkit.RendererUtils.internalGetSelectItemList(RendererUtils.java:485)
| at org.apache.myfaces.renderkit.RendererUtils.getSelectItemList(RendererUtils.java:461)
| at org.apache.myfaces.renderkit.html.HtmlRendererUtils.internalRenderSelect(HtmlRendererUtils.java:272)
| at org.apache.myfaces.renderkit.html.HtmlRendererUtils.renderMenu(HtmlRendererUtils.java:246)
| at org.apache.myfaces.renderkit.html.HtmlMenuRendererBase.encodeEnd(HtmlMenuRendererBase.java:54)
| at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:331)
| at javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:349)
| at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:253)
| at org.apache.jsp.uQuickPersonAdd_jsp._jspx_meth_h_selectOneMenu_0(uQuickPersonAdd_jsp.java:462)
| at org.apache.jsp.uQuickPersonAdd_jsp._jspx_meth_h_form_0(uQuickPersonAdd_jsp.java:302)
| at org.apache.jsp.uQuickPersonAdd_jsp._jspx_meth_f_view_0(uQuickPersonAdd_jsp.java:193)
| at org.apache.jsp.uQuickPersonAdd_jsp._jspService(uQuickPersonAdd_jsp.java:101)
| at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
| at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
| at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
| at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
| at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
| at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
| at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
| at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
| at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
| at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
| at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
| at org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:59)
| at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:45)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| at java.lang.Thread.run(Thread.java:613)
| 15:49:08,384 ERROR [SeamExceptionFilter] uncaught exception handled by Seam
| javax.servlet.ServletException: Value binding '#{roomListByOrganization}'of UISelectItems with component-path {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /uQuickPersonAdd.jsp][Class: javax.faces.component.html.HtmlForm,Id: _id2][Class: javax.faces.component.html.HtmlSelectOneMenu,Id: _id7][Class: javax.faces.component.UISelectItems,Id: _id8]} does not reference an Object of type SelectItem, SelectItem[], Collection or Map but of type : null
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:121)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:45)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| at java.lang.Thread.run(Thread.java:613)
| 15:49:08,386 INFO [SeamExceptionFilter] killing transaction
| 15:49:08,390 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
| javax.faces.FacesException: Value binding '#{roomListByOrganization}'of UISelectItems with component-path {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /uQuickPersonAdd.jsp][Class: javax.faces.component.html.HtmlForm,Id: _id2][Class: javax.faces.component.html.HtmlSelectOneMenu,Id: _id7][Class: javax.faces.component.UISelectItems,Id: _id8]} does not reference an Object of type SelectItem, SelectItem[], Collection or Map but of type : null
| at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421)
| at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
| at org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:59)
| at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:45)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
|
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