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Remko Popma commented on GROOVY-8975: ------------------------------------- [~daniel_sun] Thanks for the heads-up, I wasn't aware of this. Taking a look now. > 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 > Assignee: Remko Popma > 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... -- This message was sent by Atlassian JIRA (v7.6.3#76005)