Martin Zabel created WICKET-5163:
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Summary: Implementing markup loading by extending
ResourceStreamLocator produces errors with inherited markup
Key: WICKET-5163
URL: https://issues.apache.org/jira/browse/WICKET-5163
Project: Wicket
Issue Type: Bug
Components: wicket
Affects Versions: 6.7.0
Reporter: Martin Zabel
Priority: Minor
Attachments: inheritanceandmarkuploading.zip
According to Wicket wiki it should be possible to implement
application-specific markup loading by extending ResourceStreamLocator
(https://cwiki.apache.org/WICKET/control-where-html-files-are-loaded-from.html).
The method ResourceStreamLocator#locate returns an IResourceStream. Therefore
it should be possible to return a custom
FileResourceStream/StringResourceStream/...
However, whenResourceStreamLocator#locate returns anything else than the
standard implementation this works only as long as no markup inheritance is
involved.
When any markup inherited from other markup is loaded, the following stack
trace is printed:
ERROR - MarkupFactory - Markup not found: Base markup of inherited
markup not found. Component class: my.package.HomePage. Enable debug messages
for org.apache.wicket.core.util.resource.locator.ResourceStreamLocator to get a
list of all filenames tried.
org.apache.wicket.markup.MarkupNotFoundException: Base markup of inherited
markup not found. Component class: my.package.HomePage. Enable debug messages
for org.apache.wicket.core.util.resource.locator.ResourceStreamLocator to get a
list of all filenames tried.
at
org.apache.wicket.markup.loader.InheritedMarkupMarkupLoader.loadMarkup(InheritedMarkupMarkupLoader.java:71)
at
org.apache.wicket.markup.loader.DefaultMarkupLoader.loadMarkup(DefaultMarkupLoader.java:52)
at
org.apache.wicket.markup.MarkupFactory.loadMarkup(MarkupFactory.java:412)
at org.apache.wicket.markup.MarkupCache.loadMarkup(MarkupCache.java:448)
...
ERROR - DefaultExceptionMapper - Unexpected error occurred
org.apache.wicket.markup.MarkupNotFoundException: Can not determine Markup.
Component is not yet connected to a parent. [Page class = my.package.HomePage,
id = 0, render count = 1]
at org.apache.wicket.Component.getMarkup(Component.java:736)
at org.apache.wicket.Component.internalRender(Component.java:2335)
at org.apache.wicket.Component.render(Component.java:2298)
at org.apache.wicket.Page.renderPage(Page.java:1010)
at
org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:116)
...
The attached source shows this issue. HomePage is loaded without any problem.
Clicking the link to view InheritingPage makes the error occur. When exactly
the same html code is loaded from the standard file location there is no
problem at all.
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