java.lang.UnsupportedOperationException: getRowData (String rowKey) deve essere implementato quando non viene utilizzato l'algoritmo rowKey di base

Question

Ho aggiornato PrimeFaces dalla versione 5.1 alla 5.2 finale (la versione comunità). Ho un <p:dataTable> che viene caricato pigramente come segue (un esempio minimo per riprodurre il problema solo per scopi puramente test).

<p:dataTable var="row" 
       value="#{testManagedBean}" 
       lazy="true" 
       editable="true" 
       rowKey="#{row.fruitId}" 
       selection="#{testManagedBean.selectedValues}" 
       rows="50"> 

    <p:column selectionMode="multiple"/> 

    <p:ajax event="rowEdit" listener="#{testManagedBean.onRowEdit}"/> 

    <p:column headerText="Id"> 
     <h:outputText value="#{row.fruitId}"/> 
    </p:column> 

    <p:column headerText="Fruit Name"> 
     <p:cellEditor> 
      <f:facet name="output"> 
       <h:outputText value="#{row.fruitName}"/> 
      </f:facet> 
      <f:facet name="input"> 
       <p:inputText value="#{row.fruitName}"/> 
      </f:facet> 
     </p:cellEditor> 
    </p:column> 

    <p:column headerText="Price"> 
     <p:cellEditor> 
      <f:facet name="output"> 
       <h:outputText value="#{row.price}"/> 
      </f:facet> 
      <f:facet name="input"> 
       <p:inputText value="#{row.price}"/> 
      </f:facet> 
     </p:cellEditor> 
    </p:column> 

    <p:column headerText="Edit"> 
     <p:rowEditor/> 
    </p:column> 
</p:dataTable> 

La corrispondente bean gestito:

@Named 
@ViewScoped 
public class TestManagedBean extends LazyDataModel<Fruit> implements Serializable { 

    private List<Fruit> selectedValues; // Getter & setter. 
    private static final long serialVersionUID = 1L; 

    public TestManagedBean() {} 

    private List<Fruit> init() { 
     List<Fruit> fruits = new ArrayList<Fruit>(); 

     Fruit fruit = new Fruit(); 
     fruit.setFruitId(1); 
     fruit.setFruitName("Mango"); 
     fruit.setPrice(500D); 
     fruits.add(fruit); 

     fruit = new Fruit(); 
     fruit.setFruitId(2); 
     fruit.setFruitName("Guava"); 
     fruit.setPrice(300D); 
     fruits.add(fruit); 

     fruit = new Fruit(); 
     fruit.setFruitId(3); 
     fruit.setFruitName("Apple"); 
     fruit.setPrice(600D); 
     fruits.add(fruit); 
     return fruits; 
    } 

    @Override 
    public List<Fruit> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) { 
     List<Fruit> fruits = init(); 
     setRowCount(fruits.size()); 
     return fruits; 
    } 

    public void onRowEdit(RowEditEvent event) { 
     System.out.println("id : "+((Fruit)event.getObject()).getFruitId()); 
    } 
} 

Durante la modifica del metodo onRowEdit() dovrebbe essere invocata che è legato,

<p:ajax event="rowEdit" listener="#{testManagedBean.onRowEdit}"/> 

Quando una riga è in una modalità di modifica e il link di aggiornamento contrassegnato da un segno di spunta viene cliccato, fa sì che venga generata la seguente eccezione.

Info: java.lang.UnsupportedOperationException: getRowData(String rowKey) must be implemented when basic rowKey algorithm is not used. 
java.lang.UnsupportedOperationException: getRowData(String rowKey) must be implemented when basic rowKey algorithm is not used. 
    at org.primefaces.model.LazyDataModel.getRowData(LazyDataModel.java:95) 
    at org.primefaces.component.datatable.DataTable.getRowData(DataTable.java:1214) 
    at org.primefaces.component.datatable.feature.SelectionFeature.decodeMultipleSelection(SelectionFeature.java:90) 
    at org.primefaces.component.datatable.feature.SelectionFeature.decode(SelectionFeature.java:48) 
    at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:62) 
    at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:834) 
    at org.primefaces.component.api.UIData.processDecodes(UIData.java:281) 
    at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573) 
    at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183) 
    at org.primefaces.component.api.UIData.visitTree(UIData.java:821) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at javax.faces.component.UIForm.visitTree(UIForm.java:380) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403) 
    at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266) 
    at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:60) 
    at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:930) 
    at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:660) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) 
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167) 
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201) 
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175) 
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235) 
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112) 
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) 
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561) 
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545) 
    at java.lang.Thread.run(Thread.java:745) 

Warning: java.lang.UnsupportedOperationException: getRowData(String rowKey) must be implemented when basic rowKey algorithm is not used. 
javax.faces.FacesException: java.lang.UnsupportedOperationException: getRowData(String rowKey) must be implemented when basic rowKey algorithm is not used. 
    at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:273) 
    at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:60) 
    at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:930) 
    at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:660) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) 
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167) 
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201) 
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175) 
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235) 
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112) 
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) 
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561) 
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545) 
    at java.lang.Thread.run(Thread.java:745) 
Caused by: java.lang.UnsupportedOperationException: getRowData(String rowKey) must be implemented when basic rowKey algorithm is not used. 
    at org.primefaces.model.LazyDataModel.getRowData(LazyDataModel.java:95) 
    at org.primefaces.component.datatable.DataTable.getRowData(DataTable.java:1214) 
    at org.primefaces.component.datatable.feature.SelectionFeature.decodeMultipleSelection(SelectionFeature.java:90) 
    at org.primefaces.component.datatable.feature.SelectionFeature.decode(SelectionFeature.java:48) 
    at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:62) 
    at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:834) 
    at org.primefaces.component.api.UIData.processDecodes(UIData.java:281) 
    at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573) 
    at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183) 
    at org.primefaces.component.api.UIData.visitTree(UIData.java:821) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at javax.faces.component.UIForm.visitTree(UIForm.java:380) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403) 
    at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266) 
    ... 34 more 

Severe: java.lang.UnsupportedOperationException: getRowData(String rowKey) must be implemented when basic rowKey algorithm is not used. 
    at org.primefaces.model.LazyDataModel.getRowData(LazyDataModel.java:95) 
    at org.primefaces.component.datatable.DataTable.getRowData(DataTable.java:1214) 
    at org.primefaces.component.datatable.feature.SelectionFeature.decodeMultipleSelection(SelectionFeature.java:90) 
    at org.primefaces.component.datatable.feature.SelectionFeature.decode(SelectionFeature.java:48) 
    at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:62) 
    at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:834) 
    at org.primefaces.component.api.UIData.processDecodes(UIData.java:281) 
    at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573) 
    at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183) 
    at org.primefaces.component.api.UIData.visitTree(UIData.java:821) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at javax.faces.component.UIForm.visitTree(UIForm.java:380) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1690) 
    at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403) 
    at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266) 
    at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:60) 
    at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:930) 
    at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:660) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) 
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167) 
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201) 
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175) 
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235) 
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112) 
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) 
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561) 
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545) 
    at java.lang.Thread.run(Thread.java:745) 

Questo non dovrebbe accadere perché rowKey="#{row.fruitId}" viene utilizzato con il dato <p:dataTable>.

L'eccezione scompare solo quando l'attributo rowKey viene rimosso e i metodi getRowKey() e getRowData() vengono implementati nel bean gestito associato come segue.

@Override 
public Object getRowKey(Fruit fruit) { 
    return fruit != null ? fruit.getFruitId() : null; 
} 

@Override 
public Fruit getRowData(String rowKey) { 
    List<Fruit> fruits = (List<Fruit>) getWrappedData(); 
    Integer value = Integer.valueOf(rowKey); 

    for (Fruit fruit : fruits) { 
     if (fruit.getFruitId().equals(value)) { 
      return fruit; 
     } 
    } 

    return null; 
} 

E 'obbligatorio l'ultima versione di primefaces (5.2 finale), che non era necessario nella versione precedente di primefaces (5,1 finale)?

_{Testato su Mojarra 2.3.0-m02. Presumo che non ci dovrebbe essere alcuna rilevanza con questa versione di Mojarra.}

Answer 1

Come accennato in this link che punta alla Community Forum primefaces,

Abbiamo cambiato che parte dalla progettazione causare la movimentazione con un attributo LazyDataModelrowKey non è corretto.

Questi due metodi getRowKey() e getRowData() devono essere attuate nel bean gestito associato quando viene utilizzato LazyDataModel<T> come mostrato in questione.

Da PrimeFaces User Guide (PDF) - (5.1 (pagina 164) e 5.2 (pagina 166)):

caricamento pigro è un approccio a che fare con enormi set di dati in modo efficiente, lavori di impaginazione basate regolare ajax per il rendering solo una particolare ma richiede comunque che tutti i dati vengano caricati in memoria. Lazy caricamento dati visualizzabile una pagina particolare allo stesso modo, ma anche solo carica i dati della pagina in memoria, non l'intero set di dati. Per implementare questo metodo, è necessario eseguire il binding di un valore org.primefaces.model.LazyDataModel come valore e implementare il metodo di caricamento e abilitare l'opzione lazy. Inoltre è necessario implementare getRowData e getRowKey se la selezione è abilitata.

---

L'attributo rowKey possono essere utilizzati, quando lazy è disabilitato - è impostato false (default) e selezione di riga viene abilitata.

Da PrimeFaces User Guide (PDF) - (5.1 (pagina 159) e 5.2 (pagina 161)):

RowKey dovrebbe un identificatore univoco dal vostro modello di dati e utilizzato da DataTable per trovare le righe selezionate. È possibile definire questa chiave per utilizzando l'attributo rowKey o associando un modello di dati che implementa org.primefaces.model.SelectableDataModel.

Come ad esempio,

<p:dataTable var="car" 
      value="#{carBean.cars}" 
      selection="#{carBean.selectedCars}" 
      rowKey="#{car.id}"> 

    <p:column selectionMode="multiple"/> 
    <!--columns--> 
</p:dataTable>