content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.
   */
  package com.github.jobson.jobs;
  
  import com.github.jobson.dao.jobs.WritingJobDAO;
  
  import java.util.Optional;
  
  public final class JobOutputPersister implements JobOutputResultVisitorT<Optional<String>> {
  
      private final JobId jobId;
      private final WritingJobDAO jobDAO;
  
      public JobOutputPersister(JobId jobId, WritingJobDAO jobDAO) {
          this.jobId = jobId;
          this.jobDAO = jobDAO;
      }
  
      @Override
      public Optional<String> visit(MissingOutput missingOutput) {
          return missingOutput.isRequired() ?
                  Optional.of(String.format("%s (expected at: %s) was missing", missingOutput.getId(), missingOutput.getExpectedLocation())) :
                  Optional.empty();
      }
  
      @Override
      public Optional<String> visit(JobOutput jobOutput) {
          this.jobDAO.persistOutput(this.jobId, jobOutput);
          return Optional.empty();
      }
  }
  