other entities that control, are controlled by, or are under common
      control with that entity. For the purposes of this definition,
      "control" means (i) the power, direct or indirect, to cause the
      direction or management of such entity, whether by contract or
      otherwise, or (ii) ownership of fifty percent (50%) or more of the
      outstanding shares, or (iii) beneficial ownership of such entity.

   * use {@link String#isEmpty()} instead of this method, and you won't need special null-safe forms
   * of methods like {@link String#toUpperCase} either. Or, if you'd like to normalize "in the other
   * direction," converting empty strings to {@code null}, you can use {@link #emptyToNull}.
   *
   * @param string a string reference to check
   * @return {@code true} if the string is null or is the empty string
   */

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.codelibs.core.io.InputStreamUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.lastaflute.web.response.StreamResponse;
import org.lastaflute.web.servlet.request.stream.WrittenStreamOut;

import org.codelibs.fess.app.service.DataConfigService;
import org.codelibs.fess.app.service.FileConfigService;
import org.codelibs.fess.app.service.WebConfigService;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.config.exbhv.DataConfigBhv;
import org.codelibs.fess.opensearch.config.exbhv.FailureUrlBhv;
import org.codelibs.fess.opensearch.config.exbhv.FileConfigBhv;

    addEdge(N1, N2, E12);
    addEdge(N1, N2, E12_A);

    assertThat(network.edgesConnecting(N1, N2)).containsExactly(E12, E12_A);
    // Passed nodes should be in the correct edge direction, first is the
    // source node and the second is the target node
    assertThat(network.edgesConnecting(N2, N1)).isEmpty();
  }

  @Test
  public void edgesConnecting_parallelEdges_undirected() {

   See the License for the specific language governing permissions and
   limitations under the License.
================================================================

github.com/ncw/directio
https://github.com/ncw/directio
----------------------------------------------------------------
Copyright (C) 2012 by Nick Craig-Wood http://www.craig-wood.com/nick/

import org.codelibs.fess.ds.DataStore;
import org.codelibs.fess.ds.DataStoreFactory;
import org.codelibs.fess.ds.callback.IndexUpdateCallback;
import org.codelibs.fess.entity.DataStoreParams;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.opensearch.config.exentity.DataConfig;
import org.codelibs.fess.util.ComponentUtil;

import org.codelibs.fess.crawler.serializer.DataSerializer;
import org.codelibs.fess.crawler.transformer.Transformer;
import org.codelibs.fess.crawler.util.TextUtil;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig;
import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig.ConfigName;
import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig.Param;

import org.codelibs.fess.exception.InvalidQueryException;
import org.codelibs.fess.exception.QueryParseException;
import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.query.QueryFieldConfig;
import org.codelibs.fess.query.parser.QueryParser;
import org.codelibs.fess.score.QueryRescorer;
import org.codelibs.fess.util.ComponentUtil;

import org.codelibs.fess.helper.LabelTypeHelper;
import org.codelibs.fess.helper.PathMappingHelper;
import org.codelibs.fess.helper.PermissionHelper;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig;
import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig.ConfigName;