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https://issues.apache.org/jira/browse/WICKET-4121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13125718#comment-13125718
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Dirk Forchel commented on WICKET-4121:
--------------------------------------
I've tested the attached patch. Seems to be fixed and working although there is
another problem with the RecursiveWizardModel and the "cancel"-button in the
attached quickstart application.
> WizardStep$FormValidatorWrapper.isActiveStep(WizardStep.java) causes
> NullPointerException
> -----------------------------------------------------------------------------------------
>
> Key: WICKET-4121
> URL: https://issues.apache.org/jira/browse/WICKET-4121
> Project: Wicket
> Issue Type: Bug
> Components: wicket-extensions
> Affects Versions: 1.5.1
> Reporter: Dirk Forchel
> Assignee: Sven Meier
> Attachments: WICKET-4121.patch, wizardtest.zip
>
>
> Using the Wizard with a nested WizardModel (see RecursiveWizardModel
> implementation at the attached quickstart application) causes a
> NullPointerException. I was able to run the same test application with wicket
> 1.4.18 without any problems.
> Caused by: java.lang.NullPointerException
> at
> org.apache.wicket.extensions.wizard.WizardStep$FormValidatorWrapper.isActiveStep(WizardStep.java:145)
> at
> org.apache.wicket.extensions.wizard.WizardStep$FormValidatorWrapper.getDependentFormComponents(WizardStep.java:109)
> at
> org.apache.wicket.markup.html.form.validation.FormValidatorAdapter.getDependentFormComponents(FormValidatorAdapter.java:47)
> at
> org.apache.wicket.markup.html.form.Form.validateFormValidator(Form.java:1782)
> at
> org.apache.wicket.markup.html.form.Form.validateFormValidators(Form.java:1828)
> at org.apache.wicket.markup.html.form.Form.validate(Form.java:1706)
> at org.apache.wicket.markup.html.form.Form.process(Form.java:773)
> at
> org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:728)
> at
> org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:670)
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