I have an entity class Container with a parent child relationship with other containers using a setParent method.

public void setParent(Container parent) {
if( parent != null) {
if( this.parent != null)
this.parent.removeChild(this);

parent.addChild(this);
this.parent = parent;
}
}

I use 2 protected methods (addChild and removeChild) to implement polymorphic behaviour, but i get 'java.lang.IllegalArgumentException: Protected method: removeChild(Lexodus/ecentric/model/Node;)V' error. The strange thing is that if I change the visibility to the default package access everything works correctly.

This is strange because the package access is more strict than protected.

Any ideas?

Hibernate version: 3.0 rc1

Full stack trace of any exception that occurs:
java.lang.IllegalArgumentException: Protected method: removeChild(Lexodus/ecentric/model/Node;)V
at net.sf.cglib.proxy.MethodProxy$1.invoke(MethodProxy.java:55)
at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:134)
at exodus.ecentric.model.Container$$EnhancerByCGLIB$$1760e8c5.removeChild(<generated>)
at exodus.ecentric.model.Node.setParent(Node.java:181)
at exodus.ecentric.model.RecycleBin.delete(RecycleBin.java:48)
at exodus.ecentric.test.EntityTest.testMoveToRecycleBin(EntityTest.java:501)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at junit.framework.TestCase.runTest(TestCase.java:154)
at exodus.model.test.TestCase.runTest(TestCase.java:60)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:474)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:342)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:194)

Yes, it can intercept protected method, but it can not delegate. I can patch "CGLIBLazyInitializer" to use "setAccessable" if it doe's not seem too aggresive .

I'd say yes, try to use setAccessible(), it is better than failing without trying at all.

Thanks for the quick reply!

I would be pleased to test again when this fix is applied.

Keep up the good work guys!