Unable to generate records with record component type

[fmbenhassine]

Reported by @vab2048 in #397. Thank you @vab2048 for reporting this and for providing an example.

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If an interface is implemented by a record (with at least 1 field) and scanClasspathForConcreteTypes(true) is set then an exception is thrown.

For example consider:

public interface Dog {
    void bark();
}

with a single implementation:

public record Rottweiler(String name) implements Dog {

    @Override
    public void bark() {
        System.out.println("WOOF WOOF");
    }
}

And we have the following record which has an interface (Dog) as a field:

public record DogOwner(String ownerName, Dog dog) {}

Now with the following test:

    /**
     * Fails... when it should succeed.
     */
    @Test
    void easyRandom_DogOwner() {
        var easyRandom = getInstance();
        // Should not throw.... but does...
        var dogOwner = easyRandom.nextObject(DogOwner.class);
        System.out.println(dogOwner.toString());
    }

    private EasyRandom getInstance() {
        EasyRandomParameters parameters = new EasyRandomParameters()
                .objectFactory(new EasyRandomRecordFactory())
                .scanClasspathForConcreteTypes(true)
                ;
        return new EasyRandom(parameters);
    }

fails with the exception:

org.jeasy.random.ObjectCreationException: Unable to create a random instance of type class com.example.demo.records.DogOwner
	at org.jeasy.random.EasyRandom.doPopulateBean(EasyRandom.java:172)
	at org.jeasy.random.EasyRandom.nextObject(EasyRandom.java:100)
	at com.example.demo.records.Tests.easyRandom_DogOwner(Tests.java:32)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	...
Caused by: org.jeasy.random.ObjectCreationException: Unable to create a random instance of type interface com.example.demo.records.Dog
	at org.jeasy.random.EasyRandom.doPopulateBean(EasyRandom.java:172)
	at org.jeasy.random.EasyRandom.nextObject(EasyRandom.java:100)
	at com.example.demo.records.EasyRandomRecordFactory.createRandomRecord(EasyRandomRecordFactory.java:33)
	at com.example.demo.records.EasyRandomRecordFactory.createInstance(EasyRandomRecordFactory.java:22)
	at org.jeasy.random.EasyRandom.doPopulateBean(EasyRandom.java:147)
	... 67 more
Caused by: java.lang.IllegalAccessException: Can not set final java.lang.String field com.example.demo.records.Rottweiler.name to java.lang.String
	at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.throwFinalFieldIllegalAccessException(UnsafeFieldAccessorImpl.java:76)
	at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.throwFinalFieldIllegalAccessException(UnsafeFieldAccessorImpl.java:80)
	at java.base/jdk.internal.reflect.UnsafeQualifiedObjectFieldAccessorImpl.set(UnsafeQualifiedObjectFieldAccessorImpl.java:79)
	at java.base/java.lang.reflect.Field.set(Field.java:793)
	at org.jeasy.random.util.ReflectionUtils.setFieldValue(ReflectionUtils.java:153)
	at org.jeasy.random.util.ReflectionUtils.setProperty(ReflectionUtils.java:139)
	at org.jeasy.random.FieldPopulator.populateField(FieldPopulator.java:105)
	at org.jeasy.random.EasyRandom.populateField(EasyRandom.java:209)
	at org.jeasy.random.EasyRandom.populateFields(EasyRandom.java:198)
	at org.jeasy.random.EasyRandom.doPopulateBean(EasyRandom.java:165)

I think its because it still attempts to create the record like it was a normal class. I've attached an example project which replicates this (which is attached).

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easy-random-records-bug-example.zip

[scsete]

Hi,
when it is planned to release v6?
The main page states: "As of November 15, 2020, Easy Random is in maintenance mode. This means only bug fixes will be addressed from now on (except for #397 which will be released when Java 16 is out)."

We are (almost) at Java 21 now and we still don't have record support. :)

Thanks for the info in advance.