content: package act.session;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * Licensed 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
   * 
   *      http://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.
   * #L%
   */
  
  import org.osgl.$;
  import org.osgl.http.H;
  import org.osgl.util.C;
  import org.osgl.util.S;
  
  import java.util.List;
  
  public class CompoundSesssionMapper implements SessionMapper {
  
      private List<SessionMapper> sessionMappers;
  
      public CompoundSesssionMapper(SessionMapper ... mappers) {
          this.sessionMappers = C.listOf(mappers);
      }
  
      public CompoundSesssionMapper(List<SessionMapper> mappers) {
          this.sessionMappers = $.requireNotNull(mappers);
      }
  
      @Override
      public void writeExpiration(long expiration, H.Response response) {
          for (SessionMapper mapper : sessionMappers) {
              mapper.writeExpiration(expiration, response);
              // all mapper shall use the same expiration output logic
              // so we just break it out here
              break;
          }
      }
  
      @Override
      public void write(String session, String flash, H.Response response) {
          for (SessionMapper mapper : sessionMappers) {
              mapper.write(session, flash, response);
          }
      }
  
      @Override
      public String readSession(H.Request request) {
          for (SessionMapper mapper : sessionMappers) {
              String retVal = mapper.readSession(request);
              if (S.notBlank(retVal)) {
                  return retVal;
              }
          }
          return null;
      }
  
      @Override
      public String readFlash(H.Request request) {
          for (SessionMapper mapper : sessionMappers) {
              String retVal = mapper.readFlash(request);
              if (null != retVal) {
                  return retVal;
              }
          }
          return null;
      }
  }
  