What steps will reproduce the problem? 1. Use ConstructorArgumentConverter with a class who's constructor takes an enum. (I'm really not sure if the enum is the problem. Just a guess.)

What version of the product are you using? On what operating system? 2.4 on Linux, JDK 6.

Please provide any additional information below.

I'm sorry for not providing a detailed example, so I will understand if the issue will be rejected.

Here is my call:

List<GenericPRB> genPrbList = convert(prbList, new ConstructorArgumentConverter<PRB, GenericPRB>(GenericPRB.class, on(PRB.class), az));

The GenericPRB class's constructor takes a PRB and an enum (az in this case).

Here is the stack trace:

FAILED: TestGetAvgPrbList ch.lambdaj.function.argument.ArgumentConversionException: Unable to convert the placeholder AZ in a valid argument at ch.lambdaj.function.argument.ArgumentsFactory.actualArgument(ArgumentsFactory.java:92) at ch.lambdaj.function.convert.ArgumentConverter.<init>(ArgumentConverter.java:29) at ch.lambdaj.function.convert.ConstructorArgumentConverter.<init>(ConstructorArgumentConverter.java:35)

I get the same error if I try to use 'project':

List<GenericPRB> genPrbList = project(prbList, GenericPRB.class, on(PRB.class), az);

Until this is fixed (if it is indeed a bug), I've found a work around by writing my own special converter class.

Is this issue due to the known limitations? http://code.google.com/p/lambdaj/wiki/KnownLimitations

I was hoping since the enum (final class) wasn't being used with on(), it would be okay.

You cannot use the ConstructorArgumentConverter in this way. It is supposed to convert an instance of the class F into an instance of the T by invoking a constructor of the class T passing to it some values taken from the fields of F as in the following example:

new ConstructorArgumentConverter(GenericPRB.class, on(PRB.class).getValue1(), on(PRB.class).getValue2(), ...);

You cannot use in this converter values that are not taken from the F instance.