binding UIData and Seam

[karthikjboss]

Hi,

From my h:dataTable in the view, I bind to the UIData declared in my Session bean using binding attribute.

<h:dataTable var="listing" value="#{searchListing}" width="100%" rowClasses="lowerborderDashed" binding="#{listingSearchAction.listData}">

I am getting the following exception:
Caused by: java.lang.IllegalStateException: No conversation context active
at org.jboss.seam.ScopeType.getContext(ScopeType.java:127)
at org.jboss.seam.Component.setOutjectedValue(Component.java:1474)
at org.jboss.seam.Component.outjectFields(Component.java:1410)
at org.jboss.seam.Component.outject(Component.java:1210)
at org.jboss.seam.interceptors.BijectionInterceptor.bijectNonreentrantComponent(BijectionInterceptor.java:87)
at org.jboss.seam.interceptors.BijectionInterceptor.bijectComponent(BijectionInterceptor.java:58)
at sun.reflect.GeneratedMethodAccessor5136.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
at org.jboss.seam.interceptors.OutcomeInterceptor.interceptOutcome(OutcomeInterceptor.java:21)
at sun.reflect.GeneratedMethodAccessor5137.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
at org.jboss.seam.interceptors.ConversationInterceptor.endOrBeginLongRunningConversation(ConversationInterceptor.java:52)
at sun.reflect.GeneratedMethodAccessor5135.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
at sun.reflect.GeneratedMethodAccessor5134.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)


I saw this in some other thread without a solution. Is this a bug or I m using the binding attribute wrongly.

Any solutions / work-around for this?

[pmuir]

You can't use bind to conversation scoped Seam components. In fact, we would recommend not using JSF binding unless really really necessary

[karthikjboss]

okay, in such a case, all I need is to get the rowIndex of the DataModel in the view. If it is bound, I can use getRowIndex().

Since I cannot use binding, is there any way I can get the RowIndex in the view?
I do not need the DataModelSelectionIndex.
I need the rowIndex of each row inside the dataTable.

[pmuir]

How about using @DataModel/@DataModelSelection, a page parameter, or even, if searchListing is an implementation of DataModel, @In(#{searchList.rowIndex}) in your backing bean

[christian.bauer]

You can bind it to an EVENT scoped component if you just need the index:

 <h:dataTable value="#{wikiTextAttachments}" var="link" style="width:450px;"
 binding="#{wikiUtil.datatable}"
 styleClass="datatable rightBorder leftBorder topBorder bottomBorder"
 headerClass="regularHeader alignLeft"
 columnClasses="fivePercentColumn alignLeft, defaultColumn alignLeft"
 rowClasses="rowOdd,rowEven"
 cellpadding="0" cellspacing="0" border="0">
 <h:column>
 <f:facet name="header">Attachments:</f:facet>
 <h:panelGrid columns="3" columnClasses="onePercentColumn alignRight, onePercentColumn alignLeft, onePercentColumn alignRight">
 <s:span><a name="attachment#{wikiUtil.datatable.rowIndex + 1}"/></s:span>
 <h:outputText value="# #{wikiUtil.datatable.rowIndex + 1}"/>
 <h:graphicImage value="/themes/#{globalPrefs.themeName}/img/#{fileMetaMap[link.node.contentType].displayIcon}"
 width="18" height="20"/>
 </h:panelGrid>
 </h:column>

@Name("wikiUtil")
public class WikiUtil {


 /**
 * Need to bind UI components to non-conversational backing beans.
 * That this is even needed makes no sense. Why can't I call the UI components
 * in the EL directly? Don't try #{components['id']}, it won't work.
 */
 private UIData datatable;
 public UIData getDatatable() { return datatable; }
 public void setDatatable(UIData datatable) { this.datatable = datatable; }

}