content: /*****************************************************************
   *   Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   ****************************************************************/
  
  package org.apache.cayenne.access;
  
  import java.util.List;
  
  import org.apache.cayenne.PersistenceState;
  import org.apache.cayenne.ValueHolder;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.query.ObjectSelect;
  import org.apache.cayenne.runtime.CayenneRuntime;
  import org.apache.cayenne.testdo.testmap.Artist;
  import org.apache.cayenne.testdo.testmap.Painting;
  import org.apache.cayenne.unit.di.runtime.CayenneProjects;
  import org.apache.cayenne.unit.di.runtime.RuntimeCase;
  import org.apache.cayenne.unit.di.runtime.UseCayenneRuntime;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotSame;
  import static org.junit.Assert.assertTrue;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class DataContextRollbackIT extends RuntimeCase {
  
      @Inject
      private DataContext context;
  
      @Inject
      private CayenneRuntime runtime;
  
      @Test
      public void testRollbackNew() {
          Artist artist = (Artist) context.newObject("Artist");
          artist.setArtistName("a");
  
          Painting p1 = (Painting) context.newObject("Painting");
          p1.setPaintingTitle("p1");
          p1.setToArtist(artist);
  
          Painting p2 = (Painting) context.newObject("Painting");
          p2.setPaintingTitle("p2");
          p2.setToArtist(artist);
  
          Painting p3 = (Painting) context.newObject("Painting");
          p3.setPaintingTitle("p3");
          p3.setToArtist(artist);
  
          // before:
          assertEquals(artist, p1.getToArtist());
          assertEquals(3, artist.getPaintingArray().size());
  
          context.rollbackChanges();
  
          // after:
          assertEquals(PersistenceState.TRANSIENT, artist.getPersistenceState());
      }
  
      @Test
      public void testRollbackNewObject() {
          String artistName = "revertTestArtist";
          Artist artist = (Artist) context.newObject("Artist");
          artist.setArtistName(artistName);
  
          context.rollbackChanges();
  
          assertEquals(PersistenceState.TRANSIENT, artist.getPersistenceState());
          context.commitChanges();
          // The commit should have made no changes, so
          // perform a fetch to ensure that this artist hasn't been persisted to the db
  
          DataContext freshContext = (DataContext) runtime.newContext();
          assertNotSame(this.context, freshContext);
  
          ObjectSelect<Artist> query = ObjectSelect.query(Artist.class)
                  .where(Artist.ARTIST_NAME.eq(artistName));
          List<Artist> queryResults = query.select(freshContext);
  
          assertEquals(0, queryResults.size());
      }
  
      // Catches a bug where new objects were unregistered within an object iterator, thus
      // modifying the collection the iterator was iterating over
      // (ConcurrentModificationException)
      @Test
      public void testRollbackWithMultipleNewObjects() {
          String artistName = "rollbackTestArtist";
          String paintingTitle = "rollbackTestPainting";
          Artist artist = (Artist) context.newObject("Artist");
          artist.setArtistName(artistName);
  
          Painting painting = (Painting) context.newObject("Painting");
          painting.setPaintingTitle(paintingTitle);
          painting.setToArtist(artist);
  
          context.rollbackChanges();
  
          assertEquals(PersistenceState.TRANSIENT, artist.getPersistenceState());
          context.commitChanges();
  
          // The commit should have made no changes, so
          // perform a fetch to ensure that this artist hasn't been persisted to the db
  
          DataContext freshContext = (DataContext) runtime.newContext();
          assertNotSame(this.context, freshContext);
  
          List<?> queryResults = ObjectSelect.query(Artist.class)
                  .where(Artist.ARTIST_NAME.eq(artistName))
                  .select(freshContext);
  
          assertEquals(0, queryResults.size());
      }
  
      @Test
      public void testRollbackRelationshipModification() {
          String artistName = "relationshipModArtist";
          String paintingTitle = "relationshipTestPainting";
          Artist artist = (Artist) context.newObject("Artist");
          artist.setArtistName(artistName);
          Painting painting = (Painting) context.newObject("Painting");
          painting.setPaintingTitle(paintingTitle);
          painting.setToArtist(artist);
          context.commitChanges();
  
          painting.setToArtist(null);
          assertEquals(0, artist.getPaintingArray().size());
          context.rollbackChanges();
  
          assertTrue(((ValueHolder) artist.getPaintingArray()).isFault());
          assertEquals(1, artist.getPaintingArray().size());
          assertEquals(artist, painting.getToArtist());
  
          // Check that the reverse relationship was handled
          assertEquals(1, artist.getPaintingArray().size());
          context.commitChanges();
  
          DataContext freshContext = (DataContext) runtime.newContext();
          assertNotSame(this.context, freshContext);
  
          List<?> queryResults = ObjectSelect.query(Painting.class)
                  .where(Painting.PAINTING_TITLE.eq(paintingTitle))
                  .select(freshContext);
  
          assertEquals(1, queryResults.size());
          Painting queriedPainting = (Painting) queryResults.get(0);
  
          // NB: This is an easier comparison than manually fetching artist
          assertEquals(artistName, queriedPainting.getToArtist().getArtistName());
      }
  
      @Test
      public void testRollbackDeletedObject() {
          String artistName = "deleteTestArtist";
          Artist artist = (Artist) context.newObject("Artist");
          artist.setArtistName(artistName);
          context.commitChanges();
  
          context.deleteObjects(artist);
          context.rollbackChanges();
  
          // Now check everything is as it should be
          assertEquals(PersistenceState.HOLLOW, artist.getPersistenceState());
  
          context.commitChanges();
          // The commit should have made no changes, so
          // perform a fetch to ensure that this artist hasn't been deleted from the db
  
          DataContext freshContext = (DataContext) runtime.newContext();
          assertNotSame(this.context, freshContext);
  
          List<?> queryResults = ObjectSelect.query(Artist.class)
                  .where(Artist.ARTIST_NAME.eq(artistName))
                  .select(context);
  
          assertEquals(1, queryResults.size());
      }
  
      @Test
      public void testRollbackModifiedObject() {
          String artistName = "initialTestArtist";
          Artist artist = (Artist) context.newObject("Artist");
          artist.setArtistName(artistName);
          context.commitChanges();
  
          artist.setArtistName("a new value");
  
          context.rollbackChanges();
  
          // Make sure the inmemory changes have been rolled back
          assertEquals(artistName, artist.getArtistName());
  
          // Commit what's in memory...
          context.commitChanges();
  
          // .. and ensure that the correct data is in the db
          DataContext freshContext = (DataContext) runtime.newContext();
          assertNotSame(this.context, freshContext);
  
          List<?> queryResults = ObjectSelect.query(Artist.class)
                  .where(Artist.ARTIST_NAME.eq(artistName))
                  .select(freshContext);
  
          assertEquals(1, queryResults.size());
      }
  }
  