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  package org.apache.cayenne.query;
  
  import java.util.List;
  
  import org.apache.cayenne.access.DataContext;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.runtime.CayenneRuntime;
  import org.apache.cayenne.test.jdbc.DBHelper;
  import org.apache.cayenne.test.jdbc.TableHelper;
  import org.apache.cayenne.testdo.compound.CompoundFkTestEntity;
  import org.apache.cayenne.testdo.compound.CompoundPkTestEntity;
  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.Before;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  /**
   * Test join on compound primary key
   * @see <a href="https://issues.apache.org/jira/browse/CAY-2137">CAY-2137</a>
   * @since 4.0
   */
  @UseCayenneRuntime(CayenneProjects.COMPOUND_PROJECT)
  public class QueryWithCompoundJoinIT extends RuntimeCase {
  
      @Inject
      private DataContext context;
  
      @Inject
      private CayenneRuntime runtime;
  
      @Inject
      private DBHelper dbHelper;
  
      private TableHelper tCompoundPk;
      private TableHelper tCompoundFk;
  
      @Before
      public void setUp() throws Exception {
          tCompoundPk = new TableHelper(dbHelper, "COMPOUND_PK_TEST");
          tCompoundPk.setColumns("KEY1", "KEY2", "NAME");
  
          tCompoundFk = new TableHelper(dbHelper, "COMPOUND_FK_TEST");
          tCompoundFk.setColumns("F_KEY1", "F_KEY2", "NAME", "PKEY");
  
          createDataSet();
      }
  
      private void createDataSet() throws Exception {
          tCompoundPk.insert("a", "b", "abc");
          tCompoundPk.insert("c", "d", "cde");
  
          tCompoundFk.insert("a", "b", "test", 1);
          tCompoundFk.insert("c", "d", "nottest", 2);
      }
  
      @Test
      public void testEJBQLCompoundJoin() throws Exception {
          EJBQLQuery query = new EJBQLQuery(
                  "select f from CompoundFkTestEntity f inner join f.toCompoundPk p where p.name like 'a%'");
          List res = context.performQuery(query);
          assertEquals(1, res.size());
          assertTrue(res.get(0) instanceof CompoundFkTestEntity);
          assertEquals("test", ((CompoundFkTestEntity)res.get(0)).getName());
      }
  
      @Test
      public void testObjectSelectCompoundJoin() throws Exception {
          List<CompoundFkTestEntity> res = ObjectSelect.query(CompoundFkTestEntity.class)
                  .where(CompoundFkTestEntity.TO_COMPOUND_PK.dot(CompoundPkTestEntity.NAME).like("a%"))
                  .select(context);
          assertEquals(1, res.size());
          assertEquals("test", res.get(0).getName());
      }
  }
  