0 Replies Latest reply on Oct 5, 2011 12:23 PM by larsd

ExtendedDataTable Bug?

larsd Oct 5, 2011 12:23 PM

Hello,

I'm developing an component within a extendedDataTable an get a strange NullPointerException from Richfaces.

The solution with the PageabledDataModel etc. works fine on other pages. I want to simplify the solution and created a component, which produces this Exception while rendering the first row only if I'm not calling findObjects directly.

xhtml code:

<composite:implementation>

<corr:corOverviewBtnGroup

resetFilterBtnID="#{cc.attrs.resetFilterBtnID}"

crudBean="#{cc.attrs.crudBean}"

filterBean="#{cc.attrs.filterBean}"

doSearchBtnID="#{cc.attrs.doSearchBtnID}"

createBtnID="#{cc.attrs.createBtnID}"

createPopUpPanelGroupID="#{cc.attrs.createPopUpPanelGroupID}">

</corr:corOverviewBtnGroup>

<hr />

<rich:extendedDataTable

id="#{cc.attrs.tableId}"

value="#{cc.attrs.tableDataModel}"

(does produce the exception, but findObjects is called (debugging) and delivers the right list of entities), Exception is throw while rendering the first row

value="#{cc.attrs.tableDataModel.findObjects(0,100)}"

(does work)

var="entity"

frozenColumns="1"

rows="#{cc.attrs.tableRows}"

style="width: 100%;">

<rich:column>

<f:facet name="header">

<h:outputText value="#{commonTrans.corOverviewTableComponentActionColumn}" />

</div>

</f:facet>

<a4j:commandLink

id="cl_deleteIcon#{cc.attrs.tableId}"

styleClass="no-decor"

immediate="true"

execute="@this"

action="#{cc.attrs.crudBean.startDelete(entity)}"

render=":#{cc.attrs.deletePopUpPanelGroupID}"

rendered="#{cc.attrs.actionPermission}">

<h:graphicImage

id="img_deleteIcon#{cc.attrs.tableId}"

value="/images/tables/row_delete.gif"

alt="delete"

width="11"

height="11" />

</a4j:commandLink>

<a4j:commandLink

id="cl_editIcon#{cc.attrs.tableId}"

styleClass="no-decor"

immediate="true"

execute="@this"

action="#{cc.attrs.crudBean.startEdit(entity)}"

render=":#{cc.attrs.editPopUpPanelGroupID}"

rendered="#{cc.attrs.actionPermission}">

<h:graphicImage

id="img_editIcon#{cc.attrs.tableId}"

value="/images/tables/row_edit.gif"

alt="edit"

width="11"

height="11" />

</a4j:commandLink>

</div>

</rich:column>

<c:forEach

items="#{cc.attrs.tableListOfColumns}"

var="column">

<rich:column width="#{column.width}px" rendered="true">

<f:facet name="header">

<comp:sortColumnHeader

headerLabel="#{column.headerLabel}"

sortField="#{column.sortField}"

currentDataModel="#{cc.attrs.tableDataModel}"

render="#{cc.attrs.tableId}" />

<br />

<h:inputText rendered="#{not column.dateField}">

<a4j:ajax

event="keyup"

render="#{cc.attrs.tableId}@body"

execute="@form" />

</h:inputText>

<rich:calendar

rendered="#{column.dateField}"

id="cal_#{column.attributeName}DatePicker"

onmousedown="event.stopPropagation()" datePattern="#{lov:getDatePattern('SHORT_DATE')}">

</rich:calendar>

</div>

</f:facet>

<comp:tableText text="#{cc.attrs.tableDataModel.getCurrentColumnValue(entity, column)}" />

</div>

</rich:column>

</c:forEach>

<f:facet name="footer">

<rich:dataScroller

id="ds_#{cc.attrs.tableId}"

for="#{cc.attrs.tableId}"

maxPages="10"

render="#{cc.attrs.tableId}">

</rich:dataScroller>

</f:facet>

</rich:extendedDataTable>

</composite:implementation>

Beans:

public class MyDataModel extends PageableDataModel<Group, Long> implements

MyDatamodelInterface<Group> {

...

@Override

public List<Group> findObjects(int firstRow, int numberOfRows) {

MyDTO groupQueryDTO = new MyDTO();

groupQueryDTO.setStartFrom(firstRow);

groupQueryDTO.setAmount(numberOfRows);

final Map.Entry<String, String> search = getSortFieldOrder();

if (search != null && !StringUtils.isEmpty(search.getKey())

&& !QueryDTO.SORT_UNDEFINED.equals(search.getValue())) {

groupQueryDTO.setSortColumn(search.getKey());

groupQueryDTO.setSortDirection(search.getValue());

}

ListModelDTO<Group> groups =

getGroupAdminService().findGroups(RequestContextStack.getRequestContext(), groupQueryDTO);

resultCount = groups.getCount().intValue();

return groups.getCurrentPayload();

}

@Override

public int getNumRecords() {

return resultCount;

}

@Override

public Group getObjectById(Long identifier) {

return currentGroups.get(identifier);

}

@Override

public Long getId(Group object) {

return object.getId();

}

...

}

public abstract class PageableDataModel<T extends Serializable, U extends Serializable> extends ExtendedDataModel

implements Serializable {

... (works fine in other cases)

}

Exception:

java.lang.NullPointerException

org.richfaces.renderkit.ExtendedDataTableRenderer.encodeRow(ExtendedDataTableRenderer.java:783)

org.richfaces.renderkit.AbstractRowsRenderer.process(AbstractRowsRenderer.java:89)

com.lpsolutions.gui.common.model.PageableDataModel.walk(PageableDataModel.java:203)

org.richfaces.component.UIDataAdaptor.walk(UIDataAdaptor.java:810)

org.richfaces.renderkit.AbstractRowsRenderer.encodeRows(AbstractRowsRenderer.java:99)

org.richfaces.renderkit.ExtendedDataTableRenderer.encodeBody(ExtendedDataTableRenderer.java:438)

org.richfaces.renderkit.ExtendedDataTableRenderer.doEncodeChildren(ExtendedDataTableRenderer.java:642)

org.richfaces.renderkit.RendererBase.encodeChildren(RendererBase.java:157)

javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:848)

com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:287)

com.sun.faces.renderkit.html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:106)

javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:848)

javax.faces.component.UIComponent.encodeAll(UIComponent.java:1613)

com.sun.faces.renderkit.html_basic.CompositeRenderer.encodeChildren(CompositeRenderer.java:75)

javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:848)

javax.faces.component.UIComponent.encodeAll(UIComponent.java:1613)

javax.faces.render.Renderer.encodeChildren(Renderer.java:168)

javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:848)

javax.faces.component.UIComponent.encodeAll(UIComponent.java:1613)

javax.faces.component.UIComponent.encodeAll(UIComponent.java:1616)

com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:380)

com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:126)

javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:273)

org.apache.myfaces.tomahawk.application.ResourceViewHandlerWrapper.renderView(ResourceViewHandlerWrapper.java:93)

com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:127)

com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)

com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)

org.apache.myfaces.extensions.cdi.jsf2.impl.listener.phase.CodiLifecycleWrapper.render(CodiLifecycleWrapper.java:122)

javax.faces.webapp.FacesServlet.service(FacesServlet.java:313)

com.lpsolutions.gui.common.listener.RequestContextSetupFilter.doFilter(RequestContextSetupFilter.java:64)

com.lpsolutions.gui.common.listener.SessionInvalidationFilter.doFilter(SessionInvalidationFilter.java:44)

org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:349)

Thanks in advance.

Lars