Paul Nicolucci created MYFACES-3617:
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Summary: NullPointerException occurs when using an EL Expression
in f:viewParam name attribute
Key: MYFACES-3617
URL: https://issues.apache.org/jira/browse/MYFACES-3617
Project: MyFaces Core
Issue Type: Bug
Components: JSR-314
Affects Versions: 2.0.15
Environment: WebSphere Application Server 8.0 using MyFaces 2.0.15
Reporter: Paul Nicolucci
When using a f:viewParm on a page and using an EL Expression in the name
attribute of the f:viewParm the following NullPointerException occurs:
java.lang.NullPointerException
at
org.apache.myfaces.util.AbstractAttributeMap.get(AbstractAttributeMap.java:94)
at javax.faces.component.UIViewParameter.decode(UIViewParameter.java:84)
at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1377)
at javax.faces.component.UIInput.processDecodes(UIInput.java:188)
at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1371)
at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1365)
at
javax.faces.component.UIViewRoot._processDecodesDefault(UIViewRoot.java:1406)
at javax.faces.component.UIViewRoot.access$400(UIViewRoot.java:74)
at
javax.faces.component.UIViewRoot$ApplyRequestValuesPhaseProcessor.process(UIViewRoot.java:1497)
at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1372)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:759)
at
org.apache.myfaces.lifecycle.ApplyRequestValuesExecutor.execute(ApplyRequestValuesExecutor.java:38)
at
org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:171)
at
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
For example the following will work:
<f:viewParam name="firstName" value="#{userBean.user.firstName}" />
but this would fail:
<f:viewParam name="#{userBean.paramName1}" value="#{userBean.user.firstName}" />
I'm willing to code up a fix for this issue, but I need a bit of help figuring
out where the fix needs to go. It seems the EL expression works fine in the
value attribute just not in the name attribute. However according to the
JavaDocs name can be an EL Expression.
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