[jboss-user] [JBoss Seam] - How to access h:datatable row data during its iteration

[terryb]

I want to access row data to do certain computation on some columns as the datatable iterates to populate itself. That computed value then will be displayed in table's footer.

I also want to just access row index to list on the table.

I tried datatable binding to to UIData in the backing bean but I get EntityManager is Null error?

I think I can't use @DataModel for this purpose, since from what I read it works when user selects a row on table manually.


  | 
  | @Name("paymentReconciliation")
  | public class PaymentReconciliation extends EntityQuery {
  | 
  | ...
  | 
  | private UIData tableData = null;
  | 
  | public UIData getTableData() {
  | getTableData");
  | return this.tableData;
  | }
  | 	
  | public void setTableData(UIData uiData) {
  | this.tableData = uiData;
  | }
  | 
  | ...
  | 
  | }
  | 
  | XHTML[\b]
  | 
  | ...
  | <h:dataTable id="paymentReconciliationList" var="paymentRecon" value="#{paymentReconciliation.resultList}" 
  |            rendered="#{not empty paymentReconciliation.resultList}" border="1" binding="#{paymentReconciliation.tableData}">
  | 
  | ...
  | 
  | Exception
  | 11:51:55,077 ERROR [ExceptionFilter] exception root cause
  | java.lang.IllegalStateException: entityManager is null
  |         at org.jboss.seam.framework.EntityQuery.validate(EntityQuery.java:31)
  |         at sun.reflect.GeneratedMethodAccessor542.invoke(Unknown Source)
  |         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:597)
  |         at org.jboss.seam.util.Reflections.invoke(Reflections.java:20)
  |         at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
  |         at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57)
  |         at org.jboss.seam.interceptors.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:34)
  |         at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
  |         at org.jboss.seam.interceptors.TransactionInterceptor$1.work(TransactionInterceptor.java:32)
  |         at org.jboss.seam.util.Work.workInTransaction(Work.java:37)
  |         at org.jboss.seam.interceptors.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:27)
  |         at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
  |         at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
  |         at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
  |         at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
  |         at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:151)
  |         at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:87)
  |         at au.edu.tisc.session.admin.PaymentReconciliation_$$_javassist_97.validate(PaymentReconciliation_$$_javassist_9
  | 7.java)
  | ...
  | 
  | 
  | 

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