TypeCoercion from arbitrary object to Boolean will NPE when the value is null
(should coerce to false)
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Key: TAP5-1141
URL: https://issues.apache.org/jira/browse/TAP5-1141
Project: Tapestry 5
Issue Type: Bug
Components: tapestry-ioc
Affects Versions: 5.2.0
Reporter: Howard M. Lewis Ship
<div t:type="if" test="user.homePhoneNumber"> Home:
${user.homePhoneNumber}</div>
Results in:
Render queue error in BeginRender[PersonalDetails:if_1]: Failure reading
parameter 'test' of component PersonalDetails:if_1: Coercion of null to type
java.lang.Boolean (via Object --> String, String --> Boolean) failed:
java.lang.NullPointerException
org.apache.tapestry5.ioc.services.TapestryIOCModule$15.coerce(TapestryIOCModule.java:255)
org.apache.tapestry5.ioc.services.TapestryIOCModule$15.coerce(TapestryIOCModule.java:252)
org.apache.tapestry5.ioc.services.CoercionTuple$CoercionWrapper.coerce(CoercionTuple.java:51)
org.apache.tapestry5.ioc.internal.services.CompoundCoercion.coerce(CompoundCoercion.java:45)
org.apache.tapestry5.ioc.internal.services.TypeCoercerImpl$TargetCoercion.coerce(TypeCoercerImpl.java:72)
org.apache.tapestry5.ioc.internal.services.TypeCoercerImpl.coerce(TypeCoercerImpl.java:137)
org.apache.tapestry5.internal.transform.ParameterWorker$2$1.readFromBinding(ParameterWorker.java:282)
org.apache.tapestry5.internal.transform.ParameterWorker$2$1.get(ParameterWorker.java:381)
org.apache.tapestry5.corelib.components.If.test(If.java:45)
org.apache.tapestry5.corelib.base.AbstractConditional.beginRender(AbstractConditional.java:59)
org.apache.tapestry5.internal.transform.RenderPhaseMethodWorker$Invoker.invoke(RenderPhaseMethodWorker.java:117)
I think the special case of null -> String needs to allow for a null object
coerced to a (null) String.
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