Why JSF tomahawk dataTable do not show?

StackOverflow https://stackoverflow.com/questions/12260470

  •  30-06-2021
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Question

I am trying to create the world most simple dataTable using JSF tomahawk like this:

<html 
    xmlns="http://www.w3.org/1999/xhtml" 
    xmlns:f="http://java.sun.com/jsf/core" 
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:a4j="http://richfaces.org/a4j"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:t="http://myfaces.apache.org/tomahawk">
<h:head>
  <title></title>
</h:head>
  <h:body>
    <h:form id="theForm">
      <h:outputText value="#{theBean.theList eq null}"/>
        <t:dataTable id="dt1" value="#{theBean.theList}" var="item">
          <t:column>
            <f:facet name="header">
              <t:outputText value="Header A"/>
            </f:facet>
            <t:outputText value="#{item.itemA}"/>
          </t:column>
        </t:dataTable>
    </h:form>
  </h:body>
</html>

The above code was save as XHTML file. The bean class is look like this:

@ManagedBean(name="theBean")
@SessionScoped
public class MyBean {
  private MyData[] theList = new MyData[] {
        new MyData("1111", "", "", "")};

  public MyData[] getTheList() {
    return theList;
  }

  public void setTheList(MyData[] theList) {
    this.theList = theList;
  }
}

public class MyData {

   private String itemA;

   ...
   ...
}

In the output of the screen I don't see a data table, I see a black color false word and white blank screen, this is due to this code <h:outputText value="#{theBean.theList eq null}"/> telling me that the list is not empty.

I see this from the output from the web browser source:

<t:dataTable id="dt1" value="[Lcom.foo.MyData;@1798a6c" var="item">
  <t:column>
    <t:outputText value=""></t:outputText>
  </t:column>
</t:dataTable>

I am just curious to know why the data table doesn't show? How to make it show on the screen?

Was it helpful?

Solution

Sorry for my bad. I didn't include tomahawk jar and other dependencies as well in my classpath. Once I have them inside my classpath, the dataTable is rendered on the web page. And I notice that, the warning on the tomahawk line located on top of the page has been gone.

<html 
    xmlns="http://www.w3.org/1999/xhtml" 
    xmlns:f="http://java.sun.com/jsf/core" 
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:a4j="http://richfaces.org/a4j"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:t="http://myfaces.apache.org/tomahawk">
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