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  package org.apache.cayenne.access;
  
  import org.apache.cayenne.Cayenne;
  import org.apache.cayenne.DataChannel;
  import org.apache.cayenne.ObjectContext;
  import org.apache.cayenne.QueryResponse;
  import org.apache.cayenne.dba.frontbase.FrontBaseAdapter;
  import org.apache.cayenne.dba.mysql.MySQLAdapter;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.event.EventManager;
  import org.apache.cayenne.graph.GraphDiff;
  import org.apache.cayenne.map.EntityResolver;
  import org.apache.cayenne.query.Query;
  import org.apache.cayenne.query.SQLTemplate;
  import org.apache.cayenne.runtime.CayenneRuntime;
  import org.apache.cayenne.testdo.testmap.Artist;
  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 java.util.Map;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertSame;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class DataContextDecoratedStackIT extends RuntimeCase {
  
      @Inject
      private CayenneRuntime runtime;
  
      @Test
      public void testCommitDecorated() {
          DataDomain dd = runtime.getDataDomain();
          DataChannel decorator = new DataChannelDecorator(dd);
          DataContext context = (DataContext) runtime.newContext(decorator);
  
          Artist a = context.newObject(Artist.class);
          a.setArtistName("XXX");
          context.commitChanges();
  
          SQLTemplate query = new SQLTemplate(
                  Artist.class,
                  "select #result('count(1)' 'int' 'x') from ARTIST");
          query.setFetchingDataRows(true);
          query.setTemplate(
                  FrontBaseAdapter.class.getName(),
                  "select #result('COUNT(ARTIST_ID)' 'int' 'x') from ARTIST");
          query.setTemplate(
                  MySQLAdapter.class.getName(),
                  "select #result('COUNT(ARTIST_ID)' 'int' 'x') from ARTIST");
          Map<?, ?> count = (Map<?, ?>) Cayenne.objectForQuery(context, query);
          assertNotNull(count);
          assertEquals(1, count.get("x"));
      }
  
      @Test
      public void testGetParentDataDomain() {
          DataDomain dd = runtime.getDataDomain();
          DataChannel decorator = new DataChannelDecorator(dd);
          DataContext context = (DataContext) runtime.newContext(decorator);
  
          assertSame(dd, context.getParentDataDomain());
      }
  
      class DataChannelDecorator implements DataChannel {
  
          protected DataChannel channel;
  
          protected DataChannelDecorator() {
  
          }
  
          public DataChannelDecorator(DataChannel channel) {
              setChannel(channel);
          }
  
          public EntityResolver getEntityResolver() {
              return channel.getEntityResolver();
          }
  
          public EventManager getEventManager() {
              return channel.getEventManager();
          }
  
          public QueryResponse onQuery(ObjectContext originatingContext, Query query) {
              return channel.onQuery(originatingContext, query);
          }
  
          public GraphDiff onSync(
                  ObjectContext originatingContext,
                  GraphDiff changes,
                  int syncType) {
              return channel.onSync(originatingContext, changes, syncType);
          }
  
          public DataChannel getChannel() {
              return channel;
          }
  
          public void setChannel(DataChannel channel) {
              this.channel = channel;
          }
      }
  
  }
  