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Posted to dev@tapestry.apache.org by "Howard M. Lewis Ship (JIRA)" <de...@tapestry.apache.org> on 2008/02/23 00:41:20 UTC
[jira] Updated: (TAPESTRY-2184) Null pointer exception when
creating an action link during a component event request
[ https://issues.apache.org/jira/browse/TAPESTRY-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Howard M. Lewis Ship updated TAPESTRY-2184:
-------------------------------------------
Summary: Null pointer exception when creating an action link during a component event request (was: Invoking createActionLink() in code throws an NullPointerException even though using an ActionLink component in the template does not)
> Null pointer exception when creating an action link during a component event request
> ------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2184
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2184
> Project: Tapestry
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.0.10
> Reporter: Angelo Chen
> Assignee: Howard M. Lewis Ship
>
> 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)
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