Martin Häusler created GROOVY-10654:
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Summary: Cannot pass enum literal to ASTTransformationCustomizer
Key: GROOVY-10654
URL: https://issues.apache.org/jira/browse/GROOVY-10654
Project: Groovy
Issue Type: Bug
Components: Compiler
Affects Versions: 4.0.3
Reporter: Martin Häusler
Please consider the following compiler configuration:
{code:java}
var config = new CompilerConfiguration();
var extensions = new ArrayList<String>()
var timedInterruptParams = new HashMap<String, Object>()
// this works (value is a constant):
timedInterruptParams.put("value", 100);
// this does not work (value is an enum literal):
timedInterruptParams.put("unit", TimeUnit.MILLISECONDS);
config.addCompilationCustomizers(
new ASTTransformationCustomizer(timedInterruptParams, TimedInterrupt.class)
);
{code}
According to the documentation of ASTTransformationCustomizer, it should be
possible to override any property from the annotation (TimedInterrupt in this
case) by storing it into the parameters map (with the name of the annotation
field as key). While this works nicely for numbers and strings, it currently
doesn't seem to work for enum literals. When this configuration is used to
compile a script, the compiler will throw a runtime exception where it claims
that "TimeUnit.MILLISECONDS is not a valid constant". This should be adressed,
as enum literals are perceived as constants by most developers.
The following line is a valid workaround for the time being:
{code:java}
timedInterruptParams.put("unit", propX(classX(TimeUnit.class),
TimeUnit.MILLISECONDS.toString()), {code}
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