Hello!
I just moved over from Tapestry. So, I understand the concept of how
Wicket works, but (1) I'm not yet familiar with the implementation
details, and (2) I'm not able to find detailed component documentation
anywhere...
My question is: how do I link to a target within a page, specifically
from the same page.
For instance, I have a menu at the top that looks like:
<a href="#link1">Link 1</a>
And later in the same page:
<a name="link1></a>
When I wrap the menu link with <wicket:link>, an NullPointerException is
thrown (stack trace below).
Thanks for the advice!
Dave
java.lang.NullPointerException
at wicket.markup.html.PackageResource.get
(PackageResource.java:144)
at wicket.markup.html.PackageResource.get
(PackageResource.java:122)
at wicket.AutoLinkResolver
$CssLink.<init>(AutoLinkResolver.java:368)
at wicket.AutoLinkResolver.resolveAutomaticLink
(AutoLinkResolver.java:224)
at wicket.AutoLinkResolver.resolve(AutoLinkResolver.java:94)
at wicket.MarkupContainer.renderNext(MarkupContainer.java:1139)
at wicket.MarkupContainer.renderComponentTagBody
(MarkupContainer.java:804)
at wicket.MarkupContainer.onComponentTagBody
(MarkupContainer.java:746)
at wicket.Component.renderComponent(Component.java:1886)
at wicket.markup.html.WebMarkupContainer.onRender
(WebMarkupContainer.java:77)
at wicket.Component.render(Component.java:1160)
at wicket.MarkupContainer.autoAdd(MarkupContainer.java:168)
at wicket.markup.html.WicketLinkResolver.resolve
(WicketLinkResolver.java:71)
at wicket.MarkupContainer.renderNext(MarkupContainer.java:1139)
at wicket.MarkupContainer.renderComponentTagBody
(MarkupContainer.java:804)
at wicket.MarkupContainer.onComponentTagBody
(MarkupContainer.java:746)
at wicket.Component.renderComponent(Component.java:1886)
at wicket.markup.html.WebMarkupContainer.onRender
(WebMarkupContainer.java:77)
at wicket.Component.render(Component.java:1160)
at wicket.MarkupContainer.autoAdd(MarkupContainer.java:168)
at wicket.markup.html.BodyOnLoadResolver.resolve
(BodyOnLoadResolver.java:67)
at wicket.MarkupContainer.renderNext(MarkupContainer.java:1139)
at wicket.MarkupContainer.renderAll(MarkupContainer.java:772)
at wicket.Page.onRender(Page.java:788)
at wicket.Component.render(Component.java:1160)
at wicket.Page.doRender(Page.java:251)
at wicket.RequestCycle.respond(RequestCycle.java:883)
at wicket.RequestCycle.request(RequestCycle.java:421)
at wicket.protocol.http.WicketServlet.doGet
(WicketServlet.java:197)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at com.bioscene.web.view.internal.app.BiosceneServlet.service
(BiosceneServlet.java:52)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.mortbay.jetty.servlet.ServletHolder.handle
(ServletHolder.java:358)
at org.mortbay.jetty.servlet.OsgiServletHandler.dispatch
(OsgiServletHandler.java:108)
at org.mortbay.jetty.servlet.ServletHandler.handle
(ServletHandler.java:567)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1807)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1757)
at org.mortbay.http.HttpServer.service(HttpServer.java:879)
at org.mortbay.http.HttpConnection.service
(HttpConnection.java:790)
at org.mortbay.http.HttpConnection.handleNext
(HttpConnection.java:961)
at org.mortbay.http.HttpConnection.handle
(HttpConnection.java:807)
at org.mortbay.http.SocketListener.handleConnection
(SocketListener.java:218)
at org.mortbay.util.ThreadedServer.handle
(ThreadedServer.java:300)
at org.mortbay.util.ThreadPool$PoolThread.run
(ThreadPool.java:511)
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