Bug 528014

Description Niko Stotz 2017-12-01 08:36:13 EST

Using Eclipse 4.7.1a (Oxygen.1a) Build id: 20171005-1200

The compiler binds method / constructor calls to protected class members in the same package in a foreign plug-in, even though there would be a public binding.

This leads to IllegalAccessError on execution in an OSGi environment.

Example:

plug-in A (exports package a.b):

package a.b;
public class Target {
	public Target() {}
	
	// this should be bound in Caller.illegalAccessToProtectedConstructor*()
	public Target(Number n) {}
	
	// this is bound in Caller.illegalAccessToProtectedConstructor*()
	protected Target(Integer i) {}
	
	// this should be bound in Caller.illegalAccessToProtectedFunction*()
	public int f(Number n) {
		return 1;
	}
	
	// this is bound in Caller.illegalAccessToProtectedFunction*()
	protected int f(Integer i) {
		return 2;
	}

}

plug-in B (depends on A):

package a.b;

import a.b.Target;
import static org.junit.Assert.assertEquals;
import org.junit.Test;

public class Caller {
	@Test
	public void illegalAccessToProtectedConstructorNull() throws Exception {
		new Target(null);
	}

	@Test
	public void illegalAccessToProtectedConstructor() throws Exception {
		new Target(new Integer(1));
	}
	
	@Test
	public void validAccessToPublicConstructor() throws Exception {
		new Target((Number) new Integer(1));
	}
	
	@Test
	public void validAccessToPublicFunction() throws Exception {
		Target target = new Target();
		assertEquals(1, target.f((Number) null));
	}
	
	@Test
	public void illegalAccessToProtectedFunctionNull() throws Exception {
		Target target = new Target();
		assertEquals(2, target.f((Integer) null));
	}
	
	@Test
	public void illegalAccessToProtectedFunction() throws Exception {
		Target target = new Target();
		assertEquals(2, target.f(new Integer(1)));
	}
}