[
https://issues.apache.org/jira/browse/GROOVY-8645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17118224#comment-17118224
]
Eric Milles commented on GROOVY-8645:
-------------------------------------
One note, if you check {{instanceof}} in an if condition, you do not need to
cast or coerce within the block. Flow typing will see your variable "domain"
as type {{WarningsHolder}} and your method and property references should pass
the type checker.
Coerce translates to the {{asType}} method and there may be more behind that
then you expect.
> ClassCastException after checking of instanceOf
> -----------------------------------------------
>
> Key: GROOVY-8645
> URL: https://issues.apache.org/jira/browse/GROOVY-8645
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 2.4.11
> Reporter: Aram Arabyan
> Priority: Minor
>
> Have grails (version 3.2.11) application (it includes groovy-2.4.11.jar).
> And following code
> {code:groovy}
> @CompileStatic
> def removeAllErrors(DomainClass domainInstance) {
> newAssociationOperationRunnerBuilder(domainInstance)
> .setSkipChain({DomainObjectDetails<DomainObjectDataSingle>
> domainObjectDetails ->
> skipValidation(domainObjectDetails.currentDomain.domainObject,
> domainObjectDetails.associationProp?.name)})
> .build().run({DomainObjectDetails<DomainObjectDataSingle>
> domainObjectDetails ->
> DomainClass domain =
> domainObjectDetails.currentDomain.domainObject
> if (domain instanceof GormValidateable) {
> ((GormValidateable)domain).clearErrors()
> }
> if(domain instanceof WarningsHolder) {
> WarningsHolder warningsHolder = domain as WarningsHolder
> //<--line 120
> Warnings warnings = warningsHolder.getWarnings()
> warnings.clearWarnings(false, true)
> }
> })
> }
> {code}
> And I am getting following exception
> {code}
> java.lang.IllegalArgumentException: java.lang.ClassCastException@58798bfb
> at sun.reflect.GeneratedMethodAccessor5958.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
> at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
> at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
> at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1125)
> at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
> at
> org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:925)
> at
> org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:908)
> at
> org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:168)
> at
> org.codehaus.groovy.runtime.ScriptBytecodeAdapter.asType(ScriptBytecodeAdapter.java:591)
> at
> com.webbfontaine.grails.plugins.validation.rules.DocVerificationService$_removeAllErrors_closure5.doCall(DocVerificationService.groovy:120)
> at sun.reflect.GeneratedMethodAccessor2559.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
> at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325){code}
> Any idea what can be the reason ? Pay attention that I have @CompileStatic
> there also.
> =========================================================================
> Previous version of this code was without @CompileStatic
> {code:groovy}
> def removeAllErrors(def domainInstance) {
> newAssociationOperationRunnerBuilder(domainInstance)
> .setSkipChain({DomainObjectDetails<DomainObjectDataSingle>
> domainObjectDetails ->
> skipValidation(domainObjectDetails.currentDomain.domainObject,
> domainObjectDetails.associationProp?.name)})
> .build().run({DomainObjectDetails<DomainObjectDataSingle>
> domainObjectDetails ->
> domainObjectDetails.currentDomain.domainObject.clearErrors()
> if(domainObjectDetails.currentDomain.domainObject instanceof
> WarningsHolder) {
> Warnings warnings =
> domainObjectDetails.currentDomain.domainObject.getWarnings()
> warnings.clearWarnings(false, true)
> }
> })
> }
> {code}
> And I was getting this exception
> {code}
> com.webbfontaine.sw.sad.ci.Item cannot be cast to
> com.webbfontaine.sw.sad.ci.Item_$$_jvst840_3. Stacktrace follows:
> java.lang.ClassCastException: com.webbfontaine.sw.sad.ci.Item cannot be cast
> to com.webbfontaine.sw.sad.ci.Item_$$_jvst840_3 at
> com.webbfontaine.grails.plugins.validation.rules.DocVerificationService$_removeAllErrors_closure5.doCall(DocVerificationService.groovy:111){code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
