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  package org.apache.cayenne.reflect;
  
  import org.apache.cayenne.ObjectId;
  import org.apache.cayenne.PersistentObject;
  import org.junit.Test;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  public class LifecycleCallbackEventHandlerTest {
  
      @Test
      public void testDefaultListeners() {
  
          LifecycleCallbackEventHandler map = new LifecycleCallbackEventHandler();
          L1 l1 = new L1();
          map.addDefaultListener(l1, "callback");
  
          C1 c1 = new C1();
          c1.setObjectId(ObjectId.of("bogus"));
  
          assertEquals(0, l1.entities.size());
          map.performCallbacks(c1);
          assertEquals(1, l1.entities.size());
          assertTrue(l1.entities.contains(c1));
      }
  
      @Test
      public void testDefaultListenersCallbackOrder() {
  
          LifecycleCallbackEventHandler map = new LifecycleCallbackEventHandler();
          L2 l1 = new L2();
          map.addListener(C1.class, l1, "callback");
  
          L2 l2 = new L2();
          map.addDefaultListener(l2, "callback");
  
          C1 c1 = new C1();
          c1.setObjectId(ObjectId.of("bogus"));
  
          map.performCallbacks(c1);
          assertEquals(1, l1.callbackTimes.size());
          assertEquals(1, l2.callbackTimes.size());
  
          Long t1 = (Long) l1.callbackTimes.get(0);
          Long t2 = (Long) l2.callbackTimes.get(0);
          assertTrue(t2.compareTo(t1) < 0);
      }
  
      @Test
      public void testCallbackOnSuperclass() {
  
          LifecycleCallbackEventHandler map = new LifecycleCallbackEventHandler();
          map.addListener(C1.class, "c1Callback");
  
          C3 subclass = new C3();
          subclass.setObjectId(ObjectId.of("bogusSubclass"));
  
          assertEquals(0, subclass.callbacks.size());
          map.performCallbacks(subclass);
          assertEquals(1, subclass.callbacks.size());
      }
  
      @Test
      public void testCallbackOnSuperclassWithSublcassOverrides() {
  
          LifecycleCallbackEventHandler map = new LifecycleCallbackEventHandler();
          map.addListener(C1.class, "c1Callback");
  
          C4 subclass = new C4();
          subclass.setObjectId(ObjectId.of("bogus"));
  
          assertEquals(0, subclass.callbacks.size());
          map.performCallbacks(subclass);
          assertEquals(1, subclass.callbacks.size());
          assertEquals("c4Callback", subclass.callbacks.get(0));
      }
  
      @Test
      public void testCallbackOrderInInheritanceHierarchy() {
  
          LifecycleCallbackEventHandler map = new LifecycleCallbackEventHandler();
          map.addListener(C2.class, "c2Callback");
          map.addListener(C1.class, "c1Callback");
  
          C2 c = new C2();
          c.setObjectId(ObjectId.of("bogus"));
  
          assertTrue(c.callbacks.isEmpty());
          map.performCallbacks(c);
          assertEquals(2, c.callbacks.size());
  
          // superclass callbacks should be invoked first
          assertEquals("c1Callback", c.callbacks.get(0));
          assertEquals("c2Callback", c.callbacks.get(1));
      }
  
      static class C1 extends PersistentObject {
  
          protected List callbacks = new ArrayList();
  
          void c1Callback() {
              callbacks.add("c1Callback");
          }
      }
  
      static class C2 extends C1 {
  
          void c2Callback() {
              callbacks.add("c2Callback");
          }
      }
  
      static class C3 extends C1 {
  
      }
  
      static class C4 extends C1 {
  
          @Override
          void c1Callback() {
              callbacks.add("c4Callback");
          }
      }
  
      static class L1 {
  
          protected List entities = new ArrayList();
  
          void callback(Object entity) {
              entities.add(entity);
          }
      }
  
      static class L2 {
  
          protected List callbackTimes = new ArrayList();
  
          void callback(Object entity) {
              callbackTimes.add(System.currentTimeMillis());
              try {
                  Thread.sleep(100);
              }
              catch (InterruptedException e) {
                  e.printStackTrace();
              }
          }
      }
  }
  