Tapestry
  1. Tapestry
  2. TAPESTRY-2184

Null pointer exception when creating an action link during a component event request

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 5.0.10
    • Fix Version/s: 5.0.11
    • Component/s: tapestry-core
    • Labels:
      None

      Description

      createActionLink cause exception when it is called in the page class(see onActionFromDelete), but works when it is called from the template, this works in 5.0.6 and 7, but fails in 5.0.9 and 5.0.10, sample code and error follows:

      public class TestPage1 {
      @Inject
      private ComponentResources resources;
      private Object[] _objs;
      public Class onActivate(Object[] obj)

      { _objs = obj; return null; }

      public Object[] onPassivate()

      { return _objs;}

      Link onActionFromDelete(Long id)

      { String x = getTheLink(); // this fails with exception return null; }

      public String getTheLink()

      { Link l = resources.createActionLink("DeleteConfirm", false); return l.toURI(); }

      public Object onDeleteConfirm(Long id)

      { return null; }

      }

      template:

      <body>
      <t:ActionLink t:id="Delete" context="1">Delete me</t:ActionLink><br />
      <p>My Link is : $

      {theLink}

      </p>
      </body>

      errors:

      java.lang.NullPointerException
      Stack trace

      • org.apache.tapestry.internal.services.LinkFactoryImpl.collectActivationContextForPage(LinkFactoryImpl.java:217)
      • org.apache.tapestry.internal.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
      • org.apache.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:156)

        Activity

          People

          • Assignee:
            Howard M. Lewis Ship
            Reporter:
            Angelo Chen
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            Dates

            • Created:
              Updated:
              Resolved:

              Development