OpenJPA Build-time enhancement warning

[paperclip]

I am using OpenJPA build-time enhancement warning.
When the server starts, I get:

WARN [main] openjpa.Runtime - An error occurred while registering a ClassTransformer with PersistenceUnitInfo: name 'PuName', root URL [file:/.../]. The error has been consumed. To see it, set your openjpa.Runtime log level to TRACE. Load-time class transformation will not be available.

which openjpa documentation (http://openjpa.apache.org/integration.html) says is safe to ignore.

I would like to get rid of the message. I traced the issue down to SpringPersistenceUnitInfo.addTransformer is called, but there is no loadTimeWeaver set.

My solution is to create my own dummy LoadTimeWeaver that does nothing:

public class OpenJPALoadTimeWeaver implements LoadTimeWeaver
{
	public OpenJPALoadTimeWeaver() {
		return;
	}

	public void addTransformer(ClassFileTransformer transformer) {
		// nothing
		return;	
	}

	public ClassLoader getInstrumentableClassLoader() {
		return this.getClass().getClassLoader();
	}

	public ClassLoader getThrowawayClassLoader() {
		return this.getClass().getClassLoader();
	}
}

Seems to work for me. What are the side-effects? And should I return a different ClassLoader?

Any feedback would be appreciate, as I have no idea what I am doing

Thanks