UIXTable is not a concrete class, you should be using CoreTable. You should never use "new ComponentClass" to create a component, but instead should be using the Application to create the component using the component type. This ensures that you get the correct implementation class for the current render kit.
-Andrew On Fri, Mar 12, 2010 at 6:14 AM, Belkom,Gijs G.H.C. van <[email protected]> wrote: > Hello, > > At this moment I am trying to build a Proof of Concept for my graduate > project using Trinidad 2.0 nested grid component. The 'normal' approach for a > grid is declaring the columns in the xhtml page but I want to do this > dynamically in the backing bean. When I create a new UIXTable and add it to > the CorePanelPage, even without any column data, the internet browser > inmediately returns at startup: > > java.lang.NullPointerException > at > org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.table.TableRenderingContext.<init>(TableRenderingContext.java:102) > at > org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.TableRenderer.createRenderingContext(TableRenderer.java:518) > at > org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.TableRenderer.encodeAll(TableRenderer.java:352) > at > org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:364) > at > org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:782) > at > org.apache.myfaces.trinidad.component.UIXCollection.encodeEnd(UIXCollection.java:584) > etc... > > /* -----------------------------------------------------*/ > > My JAVA class: > > package data; > import java.io.Serializable; > import javax.el.ValueExpression; > import javax.faces.bean.ManagedBean; > import javax.faces.bean.SessionScoped; > import javax.faces.context.FacesContext; > import org.apache.myfaces.trinidad.component.core.layout.CorePanelPage; > import org.apache.myfaces.trinidad.component.core.output.CoreOutputText; > import org.apache.myfaces.trinidad.component.core.nav.CoreCommandButton; > import org.apache.myfaces.trinidad.component.UIXColumn; > import org.apache.myfaces.trinidad.component.UIXTable; > /** > * > * @author gvanbelkom > */ > @ManagedBean(name = "Table") > @SessionScoped > public class Table implements Serializable > { > CoreCommandButton button; > CoreOutputText output; > CorePanelPage panel; > UIXColumn column; > UIXTable table; > /** Creates a new instance of Table */ > public Table() > { > } > private void createDynamicObjects() > { > output = new CoreOutputText(); > output.setValueExpression("value", createValueExpression("I am a > Trinidad OutputField", String.class)); > button = new CoreCommandButton(); > button.setValueExpression("I am a Trinidad CommandButton", > createValueExpression("test", String.class)); > table = new UIXTable(); > table.setValueExpression("value", createValueExpression("I am a > Trinidad Table", String.class)); > panel = new CorePanelPage(); > panel.getChildren().add(output); > panel.getChildren().add(button); > panel.getChildren().add(table); > } > public CorePanelPage getPanel() > { > if (panel == null) > { > createDynamicObjects(); > } > return panel; > } > public void setPanel(CorePanelPage panel) > { > this.panel = panel; > } > private ValueExpression createValueExpression(String valueExpression, > Class<?> valueType) > { > FacesContext facesContext = FacesContext.getCurrentInstance(); > return > facesContext.getApplication().getExpressionFactory().createValueExpression( > facesContext.getELContext(), valueExpression, valueType); > } > } > > Do you have any sugestion to solve this problem? > > Thanks in advance, > > Gijs van Belkom >
