Class<?> testClass = classLoader.loadClass("org.jboss.modules.test.TestClass");

// direct (it works)
assertNotNull(testClass.getResource("/file1.txt")); // translates to /file1.txt
assertNotNull(testClass.getResource("file2.txt")); // translates to /org/jboss/modules/test/file2.txt

// relative (it doesn't work)
assertNotNull(testClass.getResource("../../../../file1.txt")); // should translate to /file1.txt
assertNotNull(testClass.getResource("test/../file2.txt")); // should translate to /org/jboss/modules/test/file2.txt