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Posted to notifications@groovy.apache.org by "Mauro Molinari (JIRA)" <ji...@apache.org> on 2019/01/31 14:21:00 UTC
[jira] [Commented] (GROOVY-8975) GroovyCastException on the result
of CliBuilder.parseFromSpec
[ https://issues.apache.org/jira/browse/GROOVY-8975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16757271#comment-16757271 ]
Mauro Molinari commented on GROOVY-8975:
----------------------------------------
I get the same exception if I leave:
{{def hello = cli.parseFromSpec(IHello, argz)}}
but I put {{@CompileStatic}} on my main class.
> GroovyCastException on the result of CliBuilder.parseFromSpec
> -------------------------------------------------------------
>
> Key: GROOVY-8975
> URL: https://issues.apache.org/jira/browse/GROOVY-8975
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 2.5.5
> Reporter: Mauro Molinari
> Priority: Major
>
> I'm trying to follow the tutorial about the use of CliBuilder in Groovy with Groovy 2.5.5. Copying the code at [Annotating methods of an interface|https://github.com/remkop/picocli/wiki/Groovy-2.5-CliBuilder-Renewal#annotating-methods-of-an-interface] paragraph, at runtime I have the following Exception:
> {noformat}
> Exception in thread "main" org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '{help=groovy.cli.picocli.CliBuilder$_extractAttributesFromMethod_closure12@3bb9a3ff}' with class 'java.util.LinkedHashMap' to class 'mypackage.IHello' due to: groovy.lang.GroovyRuntimeException: Could not find matching constructor for: mypackage.IHello(LinkedHashMap)
> at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformation.java:412)
> at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:328)
> at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:242)
> at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.castToType(ScriptBytecodeAdapter.java:617)
> at mypackage.MyMain.main(MyMain.groovy:20)Exception in thread "main" org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '{help=groovy.cli.picocli.CliBuilder$_extractAttributesFromMethod_closure12@3bb9a3ff}' with class 'java.util.LinkedHashMap' to class 'mypackage.IHello' due to: groovy.lang.GroovyRuntimeException: Could not find matching constructor for: mypackage.IHello(LinkedHashMap)
> at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformation.java:412)
> at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:328)
> at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:242)
> at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.castToType(ScriptBytecodeAdapter.java:617)
> at mypackage.MyMain.main(DcsServizi2Sdi.groovy:20){noformat}
> The exception occurs at this line:
> {{IHello hello = cli.parseFromSpec(IHello, argz)}}
> The exception goes away (and all works fine) if I replace it with:
> {{def hello = cli.parseFromSpec(IHello, argz)}}
> I tried to downgrade Groovy down to version 2.5.0 and I always get the exception. So this really puzzles me, since the mentioned tutorial is quite simple and straight to follow...
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