@SuppressWarnings("unchecked")
@Test
public void testOverrideLoad()
throws ClassNotFoundException, SecurityException, InstantiationException,
IllegalAccessException {
pluginLoader.setOverrideLoad(true);
String className = "org.pentaho.test.platform.plugin.pluginmgr.ClassToOverride";
Class clazz = Class.forName(className, true, getClass().getClassLoader());
Object o = clazz.newInstance();
assertEquals("I am the original class from the parent class loader", o.toString());
Class overridenClazz = Class.forName(className, true, pluginLoader);
Object o2 = overridenClazz.newInstance();
assertEquals("I am the overridden class from the plugin class loader", o2.toString());
}
@Test
public void testImplicitLoad()
throws ClassNotFoundException, InstantiationException, IllegalAccessException {
pluginLoader.setOverrideLoad(true);
//
// 1. Implicitly create an instance of ClassToOverride and check that it was loaded by the
// default loader.
//
ClassToOverride cto = new ClassToOverride();
assertNotSame(
PluginClassLoader.class.getName(), cto.getClass().getClassLoader().getClass().getName());
assertEquals(
"failed to load original class",
"I am the original class from the parent class loader",
cto.toString());
// NOTE: implicit loading of a class (i.e. "new" or static method access) is always performed by
// the
// classloader of the enclosing class (the "current" classloader), so if we set
// Thread.currentThread().setContextClassLoader(pluginLoader) and then did a new
// ClassToOverride(),
// the pluginLoader would *not* be asked to load ClassToOverride, rather the current classloader
// will be asked to load it.
//
// 2. Ask a class that we are certain was loaded by the private loader to implicitly create an
// instance
// of ClassToOverride and check that the class was loaded by the private loader
//
Object explicitlyLoadedContainer = getContainerFromPrivateClassLoader();
assertEquals(
PluginClassLoader.class.getName(),
explicitlyLoadedContainer.getClass().getClassLoader().getClass().getName());
assertEquals(
"failed to load override class",
"I am the overridden class from the plugin class loader",
explicitlyLoadedContainer.toString());
}
