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Posted to users@wicket.apache.org by "Jablow, Eric R" <Er...@ManTech.com> on 2011/11/17 23:17:05 UTC
Debugging a NPE from a ModelPropertyResolver
I am trying to use Igor's wicket-validation-bean project, and I've managed to make a mistake where I'm getting a NullPointerException from when ValidationForm attempts to add property validators. Unfortunately, I can't tell what property it's trying to attach validators for here, as the exception message does not say. Is there any way I can get a more useful message? The stack trace of the cause is
(The resulting stack trace has proprietary information)
Caused by: java.lang.NullPointerException
at net.ftlines.wicket.validation.bean.ReflectableProperty.init(ReflectableProperty.java:46)
at net.ftlines.wicket.validation.bean.ReflectableProperty.<init>(ReflectableProperty.java:98)
at net.ftlines.wicket.validation.bean.ModelPropertyResolver.resolve(ModelPropertyResolver.java:35)
at net.ftlines.wicket.validation.bean.ValidationContext.resolveProperty(ValidationContext.java:80)
at net.ftlines.wicket.validation.bean.ValidationForm$1.component(ValidationForm.java:170)
at net.ftlines.wicket.validation.bean.ValidationForm$1.component(ValidationForm.java:163)
at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:143)
at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:122)
at org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:908)
at net.ftlines.wicket.validation.bean.ValidationForm.addPropertyValidators(ValidationForm.java:162)
at net.ftlines.wicket.validation.bean.ValidationForm.onBeforeRender(ValidationForm.java:155)
at org.apache.wicket.Component.internalBeforeRender(Component.java:981)
at org.apache.wicket.Component.beforeRender(Component.java:1015)
at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1785)
... 56 more
Respectfully,
Eric Jablow
This communication, along with any attachments, is covered by federal and state law governing electronic communications and may contain company proprietary and legally privileged information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, use or copying of this message is strictly prohibited. If you have received this in error, please reply immediately to the sender and delete this message. Thank you.
Re: Debugging a NPE from a ModelPropertyResolver
Posted by Igor Vaynberg <ig...@gmail.com>.
if you create a testcase and attach it as a pull request i can take a
look. or a quickstart attached elsewhere would also work.
-igor
On Thu, Nov 17, 2011 at 4:35 PM, Jablow, Eric R <Er...@mantech.com> wrote:
> No, we are using only the stock models, I think. In any case, the particular test class uses CompoundPropertyModel.
> ________________________________________
> From: Igor Vaynberg [igor.vaynberg@gmail.com]
> Sent: Thursday, November 17, 2011 7:24 PM
> To: users@wicket.apache.org
> Subject: Re: Debugging a NPE from a ModelPropertyResolver
>
> it seems like there is a buggy implementation of
> IPropertyReflectionAwareModel somewhere. did you implement your own
> model that implements that interface? seems like there is a model
> somewhere that is a IPropertyReflectionAwareModel but it returns null
> for all getSetter/Getter/Field() methods...
>
> i will add an exception so it will be easier to flag where this is
> happenning, maybe you can try with a snapshot....
>
> -igor
> This communication, along with any attachments, is covered by federal and state law governing electronic communications and may contain company proprietary and legally privileged information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, use or copying of this message is strictly prohibited. If you have received this in error, please reply immediately to the sender and delete this message. Thank you.
>
>
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RE: Debugging a NPE from a ModelPropertyResolver
Posted by "Jablow, Eric R" <Er...@ManTech.com>.
No, we are using only the stock models, I think. In any case, the particular test class uses CompoundPropertyModel.
________________________________________
From: Igor Vaynberg [igor.vaynberg@gmail.com]
Sent: Thursday, November 17, 2011 7:24 PM
To: users@wicket.apache.org
Subject: Re: Debugging a NPE from a ModelPropertyResolver
it seems like there is a buggy implementation of
IPropertyReflectionAwareModel somewhere. did you implement your own
model that implements that interface? seems like there is a model
somewhere that is a IPropertyReflectionAwareModel but it returns null
for all getSetter/Getter/Field() methods...
i will add an exception so it will be easier to flag where this is
happenning, maybe you can try with a snapshot....
-igor
This communication, along with any attachments, is covered by federal and state law governing electronic communications and may contain company proprietary and legally privileged information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, use or copying of this message is strictly prohibited. If you have received this in error, please reply immediately to the sender and delete this message. Thank you.
---------------------------------------------------------------------
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Re: Debugging a NPE from a ModelPropertyResolver
Posted by Igor Vaynberg <ig...@gmail.com>.
it seems like there is a buggy implementation of
IPropertyReflectionAwareModel somewhere. did you implement your own
model that implements that interface? seems like there is a model
somewhere that is a IPropertyReflectionAwareModel but it returns null
for all getSetter/Getter/Field() methods...
i will add an exception so it will be easier to flag where this is
happenning, maybe you can try with a snapshot....
-igor
On Thu, Nov 17, 2011 at 2:17 PM, Jablow, Eric R <Er...@mantech.com> wrote:
> I am trying to use Igor's wicket-validation-bean project, and I've managed to make a mistake where I'm getting a NullPointerException from when ValidationForm attempts to add property validators. Unfortunately, I can't tell what property it's trying to attach validators for here, as the exception message does not say. Is there any way I can get a more useful message? The stack trace of the cause is
>
> (The resulting stack trace has proprietary information)
>
> Caused by: java.lang.NullPointerException
> at net.ftlines.wicket.validation.bean.ReflectableProperty.init(ReflectableProperty.java:46)
> at net.ftlines.wicket.validation.bean.ReflectableProperty.<init>(ReflectableProperty.java:98)
> at net.ftlines.wicket.validation.bean.ModelPropertyResolver.resolve(ModelPropertyResolver.java:35)
> at net.ftlines.wicket.validation.bean.ValidationContext.resolveProperty(ValidationContext.java:80)
> at net.ftlines.wicket.validation.bean.ValidationForm$1.component(ValidationForm.java:170)
> at net.ftlines.wicket.validation.bean.ValidationForm$1.component(ValidationForm.java:163)
> at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:143)
> at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:122)
> at org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:908)
> at net.ftlines.wicket.validation.bean.ValidationForm.addPropertyValidators(ValidationForm.java:162)
> at net.ftlines.wicket.validation.bean.ValidationForm.onBeforeRender(ValidationForm.java:155)
> at org.apache.wicket.Component.internalBeforeRender(Component.java:981)
> at org.apache.wicket.Component.beforeRender(Component.java:1015)
> at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1785)
> ... 56 more
>
> Respectfully,
> Eric Jablow
>
> This communication, along with any attachments, is covered by federal and state law governing electronic communications and may contain company proprietary and legally privileged information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, use or copying of this message is strictly prohibited. If you have received this in error, please reply immediately to the sender and delete this message. Thank you.
>
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