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https://issues.apache.org/jira/browse/WICKET-7151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrea Del Bene updated WICKET-7151:
------------------------------------
Description:
When a Link component is added with wrong id we get a generic and misleading
message about HtmlHeaderContainer and ComponentTag which is null:
{quote}org.apache.wicket.WicketRuntimeException: Exception in rendering
component: [HtmlHeaderContainer [Component id = _header_]]
...
Caused by: java.lang.NullPointerException: Cannot invoke
"org.apache.wicket.markup.ComponentTag.getName()" because "tag" is null
at org.apache.wicket.markup.html.link.Link.appendAnchor(Link.java:295)
at org.apache.wicket.markup.html.link.Link.renderHead(Link.java:403)
at org.apache.wicket.Component.internalRenderHead(Component.java:2663)
at
org.apache.wicket.markup.renderStrategy.ChildFirstHeaderRenderStrategy$1.component(ChildFirstHeaderRenderStrategy.java:85)
at
org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:96)
at
org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:87)
at
org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:51
{quote}
We should catch the original exception and provide a clearer message to the user
was:
When a Link component is added with wrong id we get a generic and misleading
message about HtmlHeaderContainer and ComponentTag which is null:
org.apache.wicket.WicketRuntimeException: Exception in rendering component:
[HtmlHeaderContainer [Component id = _header_]]
...
Caused by: java.lang.NullPointerException: Cannot invoke
"org.apache.wicket.markup.ComponentTag.getName()" because "tag" is null
at org.apache.wicket.markup.html.link.Link.appendAnchor(Link.java:295)
at org.apache.wicket.markup.html.link.Link.renderHead(Link.java:403)
at org.apache.wicket.Component.internalRenderHead(Component.java:2663)
at
org.apache.wicket.markup.renderStrategy.ChildFirstHeaderRenderStrategy$1.component(ChildFirstHeaderRenderStrategy.java:85)
at
org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:96)
at
org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:87)
at
org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:51
We should catch the original exception and provide a clearer message to the user
> Misleading message when a Link component is added with wrong id
> ---------------------------------------------------------------
>
> Key: WICKET-7151
> URL: https://issues.apache.org/jira/browse/WICKET-7151
> Project: Wicket
> Issue Type: Improvement
> Affects Versions: 10.4.0, 9.20.0
> Reporter: Andrea Del Bene
> Priority: Minor
>
> When a Link component is added with wrong id we get a generic and misleading
> message about HtmlHeaderContainer and ComponentTag which is null:
>
> {quote}org.apache.wicket.WicketRuntimeException: Exception in rendering
> component: [HtmlHeaderContainer [Component id = _header_]]
> ...
> Caused by: java.lang.NullPointerException: Cannot invoke
> "org.apache.wicket.markup.ComponentTag.getName()" because "tag" is null
> at org.apache.wicket.markup.html.link.Link.appendAnchor(Link.java:295)
> at org.apache.wicket.markup.html.link.Link.renderHead(Link.java:403)
> at org.apache.wicket.Component.internalRenderHead(Component.java:2663)
> at
> org.apache.wicket.markup.renderStrategy.ChildFirstHeaderRenderStrategy$1.component(ChildFirstHeaderRenderStrategy.java:85)
> at
> org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:96)
> at
> org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:87)
> at
> org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor.visit(DeepChildFirstVisitor.java:51
> {quote}
>
> We should catch the original exception and provide a clearer message to the
> user
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