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  package org.apache.cayenne.dbsync.reverse.dbload;
  
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.cayenne.dba.DbAdapter;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.map.DbAttribute;
  import org.apache.cayenne.map.DbEntity;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  
  public class ExportedKeyLoaderIT extends BaseLoaderIT {
  
      @Inject
      DbAdapter adapter;
  
      @Test
      public void testExportedKeyLoad() throws Exception {
          boolean supportsFK = accessStackAdapter.supportsFKConstraints();
          if(!supportsFK) {
              return;
          }
  
          createEntity(nameForDb("ARTIST"));
          createEntity(nameForDb("GALLERY"));
          createEntity(nameForDb("PAINTING"));
  
          String catalog = connection.getCatalog();
          String schema = connection.getSchema();
  
          DbEntity artist = getDbEntity("ARTIST");
          if(adapter.supportsCatalogsOnReverseEngineering()) {
              artist.setCatalog(catalog);
          }
          artist.setSchema(schema);
          DbAttribute artistId = new DbAttribute("ARTIST_ID");
          artist.addAttribute(artistId);
  
          DbEntity gallery = getDbEntity("GALLERY");
          if(adapter.supportsCatalogsOnReverseEngineering()) {
              gallery.setCatalog(catalog);
          }
          gallery.setSchema(schema);
          DbAttribute galleryId = new DbAttribute("GALLERY_ID");
          gallery.addAttribute(galleryId);
  
          DbEntity painting = getDbEntity("PAINTING");
          if(adapter.supportsCatalogsOnReverseEngineering()) {
              painting.setCatalog(catalog);
          }
          painting.setSchema(schema);
          DbAttribute paintingId = new DbAttribute("PAINTING_ID");
          DbAttribute paintingArtistId = new DbAttribute("ARTIST_ID");
          DbAttribute paintingGalleryId = new DbAttribute("GALLERY_ID");
          painting.addAttribute(paintingId);
          painting.addAttribute(paintingArtistId);
          painting.addAttribute(paintingGalleryId);
  
          ExportedKeyLoader loader = new ExportedKeyLoader(EMPTY_CONFIG, new DefaultDbLoaderDelegate());
          loader.load(connection.getMetaData(), store);
  
          assertEquals(2, store.getExportedKeysEntrySet().size());
  
          ExportedKey artistIdFk = findArtistExportedKey();
          assertNotNull(artistIdFk);
  
          assertEquals("ARTIST", artistIdFk.getPk().getTable().toUpperCase());
          assertEquals("ARTIST_ID", artistIdFk.getPk().getColumn().toUpperCase());
  
          assertEquals("PAINTING", artistIdFk.getFk().getTable().toUpperCase());
          assertEquals("ARTIST_ID", artistIdFk.getFk().getColumn().toUpperCase());
      }
  
      private ExportedKey findArtistExportedKey() {
          for(Map.Entry<String, Set<ExportedKey>> entry : store.getExportedKeysEntrySet()) {
              if(entry.getKey().toUpperCase().endsWith(".ARTIST_ID")) {
                  return entry.getValue().iterator().next();
              }
          }
  
          return null;
      }
  }
  